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Braz. j. oral sci ; 21: e225924, jan.-dez. 2022. ilus
Article in English | LILACS, BBO | ID: biblio-1355003


Aim: To assess the reliability and validity of morphometric features on 3D digital models produced by scanning maxillary dental casts of Malaysian Malay subjects. Methods: Dental casts of 20 subjects were scanned using a 3D laser scanner (Next Engine Inc., Santa Monica, California, USA). The palatal rugae morphometric features were assessed on the resulting 3D models using 3-Matic Research 9.0 software (Materialise NV, Heverlee, Belgium). The assessments were repeated by the first and second authors to assess the intra- and interexaminer reliability, respectively. Rugae morphometric features were also evaluated on the conventional plaster models to assess the validity of the 3D method. Results: Kappa values of the validity ranged from 0.807 to 0.922 for rugae shape, size category and direction. The intraclass correlation coefficient (ICC) for rugae number validity was 0.979. For intra-examiner reliability, kappa values ranged from 0.716-1.000 for rugae shape, size category and direction. The ICC for rugae number intra-examiner reliability was 0.949. Kappa values of interexaminer reliability for rugae shape, size category and direction were 0.723-885, while the ICC of rugae number was 0.896. Conclusion: Palatal rugae analyses on 3D digital models scanned by the 3D Next Engine laser scanner using 3-Matic Research 9.0 software are valid and reliable

Palate , Forensic Anthropology , Imaging, Three-Dimensional , Forensic Dentistry
Braz. j. oral sci ; 21: e227903, jan.-dez. 2022. ilus
Article in English | LILACS, BBO | ID: biblio-1355005


Aim: To evaluate the accuracy and the validity of orthodontic diagnostic measurements, as well as virtual tooth transformations using a generic open access 3D software compared to OrthoAnalyzer (3Shape) software; which was previously tested and proven for accuracy. Methods: 40 maxillary and mandibular single arch study models were duplicated and scanned using 3Shape laser scanner. The files were imported into the generic and OrthoAnalyzer software programs; where linear measurements were taken twice to investigate the accuracy of the program. To test the accuracy of the program format, they were printed, rescanned and imported into OrthAnalyzer. Finally, to investigate the accuracy of editing capabilities, linear and angular transformation procedures were performed, superimposed and printed to be rescanned and imported to OrthoAnalyzer for comparison. Results: There was no statistically significant difference between the two groups using the two software programs regarding the accuracy of the linear measurements (p>0.05). There was no statistically significant difference between the different formats among all the measurements, (p>0.05). The editing capabilities also showed no statistically significant difference (p>0.05). Conclusion: The generic 3D software (Meshmixer) was valid and accurate in cast measurements and linear and angular editing procedures. It can be used for orthodontic diagnosis and treatment planning without added costs

Software , Casts, Surgical , Imaging, Three-Dimensional , Models, Dental
Rev. Bras. Saúde Mater. Infant. (Online) ; 22(1): 147-155, Jan.-Mar. 2022. tab, graf
Article in English | LILACS | ID: biblio-1376210


Abstract Objectives: to verify the agreement among adolescents' perception of their own body image and the health professionals' analysis based on three-dimensional body image and the inter-rater agreement. Methods: a cross-sectional study was carried out with 1,662 adolescents, aged 18 to 19 years old, from the 1997/98 birth cohort in São Luís, Maranhão. Self-perception of body image was assessed using the Stunkard's body image scale. Three nutritionists evaluated the three-dimensional body image obtained by the Photonic Scanner (3D Body Scanner) and classified according to the Stunkard's scale. The agreement between raters was verified by using weighted Kappa. Results: the analysis of agreement between raters in the general group and when stratified by sexwas considered moderate to good by Kappa. Regarding the intraclass correlation (ICC), good and excellent correlation values were observed both in the general group, males and females. There was a greater perception of overweight by all raters, when compared with the adolescents' self-assessments. When stratified by sex, examiner 1 had the same perception as male self-assessments, as for females the perception of overweight was more frequent, as well as raters 2 and 3, for both sexes. Conclusion: agreement between raters and self-assessments was considered weak/moderate in Kappa and good/excellent in ICC.

Resumo Objetivos: verificar a concordância da autopercepção da imagem corporal de adolescentes com a análise de profissionais da saúde a partir de imagem corporal tridimensional e a concordância inter-avaliadores. Métodos: estudo transversal, com 1662 adolescentes, de 18-19 anos, da coorte de nascimento de 1997/98 de São Luís, Maranhão. A autopercepção da imagem corporal foi avaliada pela escala de imagem corporal de Stunkard. Três nutricionistas avaliaram a imagem corporal tridimensional e classificaram conforme Stunkard. A concordância foi verificada utilizando Kappa ponderado. Resultados: a análise de concordância entre os avaliadores no grupo geral e quando estratificada por sexo foi considerada moderada a boa pelo Kappa. Em relação a correlação intraclasse (ICC), observou-se valores de correlação bons e excelentes tanto no grupo geral, quanto no sexo masculino e no feminino. Notou-se maior percepção de excesso de peso por todos os avaliadores, quando comparado às autoavaliações dos adolescentes. Quando estratificado por sexo, o avaliador 1 teve a mesma percepção que as autoavaliações do sexo masculino, enquanto para o sexo feminino a percepção de excesso de peso foi mais frequente, assim como os avaliadores 2 e 3, para ambos os sexos. Conclusão: a concordância entre avaliadores e as autoavaliações foram consideradas fracas/moderadas no Kappa e bons/excelente pela ICC.

Humans , Male , Female , Adolescent , Adult , Self Concept , Body Image , Health Personnel , Imaging, Three-Dimensional , Overweight , Body Dissatisfaction , Brazil , Cross-Sectional Studies
Rev. ADM ; 79(1): 12-19, ene.-feb. 2022. ilus, graf
Article in Spanish | LILACS | ID: biblio-1361307


El objetivo del presente estudio fue medir la curvatura vestíbulo-lingual de los conductos de las raíces mesiales de primeros molares inferiores en personas adultas del estado de Chihuahua, por medio de la técnica de tomografía computarizada de haz cónico (CBCT, por sus siglas en inglés) y usando el software de análisis 3D EndoTM (Dentsply/Sirona USA). Se llevó a cabo la medición por dos observadoras, empleando dos métodos diferentes, Schneider y 3D EndoTM (Dentsply/Sirona USA). Los resultados obtenidos tuvieron valores mayores a los 100 grados con la técnica 3D EndoTM y a los 20 grados con la técnica de Schneider. No se detectó una diferencia estadística significativa al comparar los diferentes conductos entre sí (AU)

The objective of the present study was to measure the vestibule-lingual curvature of the ducts of the mesial roots of lower first molars, of adults from the state of Chihuahua. Using the cone beam computed tomography (CBCT) technique and using the 3D analysis software EndoTM (Dentsply/Sirona USA). The measurement was carried out by two observers using two different methods, Schneider and 3D EndoTM (Dentsply/Sirona USA). The results obtained had values greater than 100 degrees with the 3D EndoTM technique and at 20 degrees with the Schneider technique. No statistically significant difference was detected when comparing the different ducts with each other (AU)

Humans , Dental Pulp Cavity , Cone-Beam Computed Tomography , Molar , Software , Data Interpretation, Statistical , Imaging, Three-Dimensional , Mexico
Neuroscience Bulletin ; (6): 303-317, 2022.
Article in English | WPRIM | ID: wpr-929085


Understanding the connection between brain and behavior in animals requires precise monitoring of their behaviors in three-dimensional (3-D) space. However, there is no available three-dimensional behavior capture system that focuses on rodents. Here, we present MouseVenue3D, an automated and low-cost system for the efficient capture of 3-D skeleton trajectories in markerless rodents. We improved the most time-consuming step in 3-D behavior capturing by developing an automatic calibration module. Then, we validated this process in behavior recognition tasks, and showed that 3-D behavioral data achieved higher accuracy than 2-D data. Subsequently, MouseVenue3D was combined with fast high-resolution miniature two-photon microscopy for synchronous neural recording and behavioral tracking in the freely-moving mouse. Finally, we successfully decoded spontaneous neuronal activity from the 3-D behavior of mice. Our findings reveal that subtle, spontaneous behavior modules are strongly correlated with spontaneous neuronal activity patterns.

Animals , Behavior, Animal , Brain/diagnostic imaging , Imaging, Three-Dimensional/methods , Mice , Neuroimaging , Rodentia
Article in Chinese | WPRIM | ID: wpr-928848


The glasses-free three dimensional(3D) endoscopic display system provides the surgeon with the depth information of the minimally invasive surgery scene obtained from the binocular perspective, which can effectively relieve the surgeon's posture fatigue and visual fatigue during the long-term surgery, and assist in the operation of surgical instruments more accurately to reduce the damage to the surrounding tissues of the operation area. However, the glasses-free 3D display device currently has the problem of a narrow optimal viewing zone and easy crosstalk, especially in the surgical teaching application scenario, which performs poorly. In order to overcome the limitation of the narrower field of view, we introduce deep learning algorithms to detect and locate multiple faces, fine-tune the 3D display grating of the endoscope, rearrange pixels, and change the best view area, so that more people can get the best view. The experimental results show that the face detection accuracy of the method is 97.88%, and the detection time is 135 frames/ms, which achieves high accuracy while maintaining real-time performance.

Endoscopes , Endoscopy , Humans , Imaging, Three-Dimensional , Minimally Invasive Surgical Procedures , Surgical Instruments
Article in Chinese | WPRIM | ID: wpr-928315


OBJECTIVE@#To investigate the effect of internal external fixator assisted O-arm navigation imaging in the treatment of unstable pelvic fractures.@*METHODS@#From May 2019 to November 2019, 15 patients with unstable pelvic fractures were treated by intraoperative O-arm navigation imaging using INFIX technology. There were 6 males and 9 females. The age ranged from 24 to 66 years old. The course of disease ranged from 2 to 14 days. According to Tile classification, there were 1 case of B1 type, 8 cases of B2 type, 3 cases of C1 type, and 3 cases of C2 type. According to Young-Burgess classification, there were 8 cases of LC, 1 case of APC, 4 cases of VS, 2 cases of CM. Preoperative routine pelvic anteroposterior film, entrance position, exit position and pelvic CT three-dimensional reconstruction were performed. Intraoperative O-arm navigation system three-dimensional reconstruction and triplane scanning imaging were used to evaluate the effect of intraoperative reduction. The anterior pelvic ring was fixed with internal external fixator, and the posterior ring was fixed with sacroiliac screw, plate screw or lumbar iliac screw. The operation time, intraoperative bleeding and nail placement were observed and recorded. The quality of fracture reduction was evaluated by Matta standard, and the postoperative function was evaluated by Majeed function score.@*RESULTS@#Wound healing was good in all patients without vascular, nerve and local irritation complications. All the 15 patients were followed up for 10 to 16 months. The fracture reduction was evaluated according to the Matta scoring standard, 9 cases were excellent results, 5 cases were good, and 1 case was medium. The Majeed functional score was 0 to 95 points.@*CONCLUSION@#The built-in external fixator assisted O-arm navigation imaging system in the treatment of unstable pelvic fractures. The reduction effect is evaluated in advance, the operation time is shortened, and the accuracy of internal fixation is improved. The operation is simple, safe and less bleeding. The operation is in line with the principles of minimally invasive medical treatment and precision medical treatment in orthopedics, which is conducive to the recovery of patients' postoperative function and rapid recovery.

Adult , Aged , Bone Plates , Female , Fracture Fixation, Internal/methods , Fractures, Bone/surgery , Humans , Imaging, Three-Dimensional , Male , Middle Aged , Surgery, Computer-Assisted , Tomography, X-Ray Computed , Young Adult
Braz. dent. sci ; 25(3): 1-7, 2022. tab, ilus
Article in English | LILACS, BBO | ID: biblio-1391021


Objective: Compare the palatal volume in children with unilateral cleft lip and palate before and after two surgical protocols. Material and Methods: Retrospective data collection was performed in a specialized hospital. The sample comprised 120 digitized dental models divided into, Group 1 (G1) ­ participants submitted to cheiloplasty at 3 months (Millard technique) and one-step palatoplasty at 12 months (von Langenbeck technique); Group 2 (G2) ­ participants submitted to cheiloplasty (Millard technique) and hard palate closure (Hans Pichler technique) at 3 months and soft palate closure at 12 months (Sommerlad technique). The dental models were evaluated at Time 1 (T1): before primary plastic surgeries, Time 2 (T2): 1st post-surgical phase, and Time 3 (T3): 2nd post-surgical phase. The volume was measured through stereophotogrammetry system software. Parametric and non-parametric statistical tests were applied (α=5%). Results: The intragroup analysis revealed that G1 had a statistically significant increase in volume at T2 followed by a reduction at T3 (p=0.003); G2 showed a statistically significant increase of dental arch volume between T1 and T2 (p=0.001). There was no statistically significant difference in the intergroup and gender analyses (p>0.05). Conclusion: The surgical protocol influenced the palatal volume of children with unilateral cleft lip and palate. This study suggested that two-step palatoplasty protocol has a tendency to be more appropriate.(AU)

Objetivo: Comparar o volume palatino em crianças com fissura unilateral de lábio e palato antes e após dois protocolos cirúrgicos. Material e Métodos: A coleta de dados retrospectiva foi efetuada em um hospital especializado. A amostra foi composta por 120 modelos dentários digitalizados divididos em, Grupo 1 (G1) ­ participantes submetidos a queiloplastia aos 3 meses de vida (técnida de Millard) e a palatoplastia em única etapa aos 12 meses (técnica de von Langenbeck); Grupo 2 (G2) ­ participantes submetidos a queiloplastia (técnica de Millard) e fechamento do palato duro (técnica de Hans Pichler) aos 3 meses de vida e fechamento do palate mole aos 12 meses (técnica de Sommerlad). Os modelos dentários foram avaliados em Tempo 1 (T1): antes das cirurgias plásticas primárias, Tempo 2 (T2):1ª fase pós-cirúrgica e Tempo 3 (T3): 2ª fase pós-cirúrgico. O volume foi mensurado por meio do software do sistema de estereofotogrametria. Testes estatísticos paramétricos e não-paramétricos foram utilizados (α=5%). Resultados: As análises intragrupos indicaram que G1 apresentou aumento estatisticamente significante em T2 seguido de redução em T3 (p=0.003). G2 apresentou crescimento estatisticamente significativo do volume palatino entre T1 e T2 (p=0.001). Não houve diferença estatisticamente significante nas análises intergrupos e entre gêneros (p>0.05). Conclusão: O protocolo cirúrgico influenciou o volume palatino das crianças com fissura unilateral de lábio e palato. Este estudo sugeriu que o protocolo da palatoplastia em duas etapas possui uma tendência de ser mais apropriado.(AU)

Cleft Lip , Cleft Palate , Oral Surgical Procedures , Imaging, Three-Dimensional , Dental Arch
Rev. bras. oftalmol ; 81: e0042, 2022. graf
Article in English | LILACS | ID: biblio-1387970


ABSTRACT Introduction: The use of tridimensional (3D) printing in healthcare has contributed to the development of instruments and implants. The 3D printing has also been used for teaching future professionals. In order to have a good 3D printed piece, it is necessary to have high quality images, such as the ones from Computerized Tomography (CT scan) exam, which shows the anatomy from different cuts and allows for a good image reconstruction. Purpose: To propose a protocol for creating digital files from computerized tomography images to be printed in 3D and used as didactic material in the ophthalmology field, using open-source software, InVesalius®, Blender® and Repetier-Host©. Methods: Two orbit CT scan exam images in the DICOM format were used to create the virtual file to be printed in 3D. To edit the images, the software InVesalius® (Version 3.1.1) was used to delimit and clean the structure of interest, and also to convert to STL format. The software Blender® (Version 2.80) was used to refine the image. The STL image was then sent to the Repetier-Host© (Version 2.1.3) software, which splits the image in layers and generates the instructions to print the piece in the 3D printer using the polymer polylactic acid (PLA). Results: The printed anatomical pieces printed reproduced most structures, both bone and soft structures, satisfactorily. However, there were some problems during printing, such as the loss of small bone structures, that are naturally surrounded by muscles due to the lack of support. Conclusion: Despite the difficulties faced during the production of the pieces, it was also possible to reproduce the anatomical structures adequately, which indicates that this protocol of 3D printing from medical images is viable.

RESUMO Introdução: O uso de impressão em 3-D na área da saúde tem contribuído para o desenvolvimento de instrumentos e próteses. A impressão 3-D tem sido usada para o ensino de futuros profissionais. Para se alcançar uma boa peça em 3-D, é necessário ter imagens de alta qualidade, como aquelas geradas pelo exame de Tomografia Computadorizada (TC), que mostra a anatomia sob diferentes cortes e permite uma boa reconstrução de imagem. Objetivo: Propor um protocolo para a criação de arquivos digitais a partir de imagens de tomografia computadorizada a serem impressas em 3-D e usadas como modelo de material didático oftalmológico usando software de código aberto, InVesalius®, Bender® e Repetier-Host©. Métodos: Foram utilizadas imagens em formato DICOM provenientes de dois exames de tomografia computadorizada de órbitas para a impressão tridimensional. Para manuseio das imagens, foram utilizados o InVesalius®, versão 3.1.1, para delimitar e limpar a estrutura de interesse e também para converter em formato STL. O Blender®, versão 2.80 foi usado para refinamento. A imagem em STL foi então enviada para o programa Repetier-Host, versão 2.1.3, que divide a imagem em camadas e gera as instruções para impressão da peça em ácido polilático na impressora tridimensional. Resultados: As peças anatômicas impressas reproduziram de forma satisfatória a maioria das estruturas ósseas e musculares. No entanto, houve dificuldade durante a impressão das estruturas ósseas menores, como perda de estrutura óssea pequena, que não possuíam sustentação, por serem envoltas pelo músculo. Conclusão: Apesar das dificuldades encontradas na produção dessas peças de estudo, foi possível reproduzir estruturas com fidelidade, indicando que o protocolo proposto viabiliza a impressão de imagens oriundas da tomografia computadorizada para impressão tridimensional.

Humans , Ophthalmology/education , Orbit/anatomy & histology , Orbit/diagnostic imaging , Tomography, X-Ray Computed/methods , Imaging, Three-Dimensional/instrumentation , Printing, Three-Dimensional/instrumentation , Students, Medical , Teaching , Software , Education, Medical/methods , Anatomy/education , Models, Anatomic
Rev. bras. oftalmol ; 81: e0052, 2022.
Article in Portuguese | LILACS | ID: biblio-1387965


RESUMO A manufatura aditiva, mais popularmente conhecida como impressão tridimensional, baseia-se no desenvolvimento de um objeto com a ajuda de um software de desenho assistido por computador seguido de sua impressão por meio da deposição de uma matéria-prima, camada por camada, para a construção do produto desejado. Existem vários tipos de técnicas de impressão tridimensional, e o tipo de processo de impressão escolhido depende da aplicação específica do objeto a ser desenvolvido, dos materiais a serem utilizados e da resolução necessária à impressão do produto final. A impressão tridimensional abriu perspectivas na pesquisa e revolucionou o campo das ciências da saúde, com a possibilidade de criação e de desenvolvimento de produtos personalizados de maneira rápida, econômica e de forma mais centralizada do que no processo de manufatura tradicional. As tecnologias de manufatura aditiva remodelaram os diagnósticos médicos; as medidas preventivas e pré-operatórias; o tratamento e a reabilitação, assim como os processos de engenharia de tecidos nos últimos anos. Na oftalmologia, as aplicações da impressão tridimensional são extensas. Modelos anatômicos para aplicação na área da educação e planejamentos cirúrgicos, desenvolvimento de implantes, lentes, equipamentos para diagnósticos, novas aplicações terapêuticas e desenvolvimento de tecidos oculares já estão em desenvolvimento. Por possuir um campo amplo e ser alvo de pesquisa constante, a área oftalmológica permite que a manufatura aditiva ainda seja amplamente utilizada a favor dos médicos e dos pacientes.

ABSTRACT Additive manufacturing, more popularly known as three-dimensional (3D) printing, is based on the development of an object with the help of computer-aided design software followed by its printing through the deposition of a material, layer by layer, to create the desired product. There are several types of 3D printing techniques and the type of printing process chosen depends on the specific application of the object to be developed, the materials to be used, and the resolution required to print the final product. 3D printing has brought new perspectives to research and revolutionized the field of health sciences, with the possibility of creating and developing customized products in a faster, more economical, and more centralized way than in the traditional manufacturing process. Additive manufacturing technologies have reformulated medical diagnostics, preventive, preoperative, treatment, and rehabilitation, as well as tissue engineering processes in recent years. In ophthalmology, the applications of 3D printing are extensive. Anatomical models for application in education and surgical planning, development of implants, lenses, diagnostic equipment, new therapeutic applications, and development of ocular tissues (3D bioprinting) are already under development. As it has a wide field and is the subject of constant research, the ophthalmic area allows additive manufacturing to still be widely used in favor of doctors and patients.

Humans , Ophthalmology , Imaging, Three-Dimensional , Printing, Three-Dimensional , Polymers , Prostheses and Implants , Biosensing Techniques , Computer-Aided Design , Recycling , Bioprinting , Stereolithography , Models, Anatomic
Braz. j. oral sci ; 20: e219912, jan.-dez. 2021. ilus
Article in English | LILACS, BBO | ID: biblio-1254429


Aim: Evaluation of the reliability of 3D computed tomography (3D-CT) in the diagnosis of mandibular fractures. Methods: A cross-sectional, quantitative and qualitative study was carried out, through the application of a questionnaire for 70 professionals in the area of Oral and Maxillofacial Surgery and Radiology. 3D-CT images of mandibular fractures were delivered to the interviewees along with a questionnaire. Participants answered about the number of traces, the region and the type of fracture. The correct diagnosis, that is, the expected answer, was based on the reports of a specialist in oral and maxillofacial radiology after viewing the images in the axial, sagittal and coronal sections. The resulting data from the interviewees was compared with the expected answer and then, the data was analyzed statistically. Results: In the sample 56.9% were between 22 and 30 years old, 52.8% were oral and maxillofacial surgeons (OMF), 34.7% were residents in OMF surgery and 12.5% OMF radiologists. Each professional answered 15 questions (related to five patients) and 50.8% of the total of these was answered correctly. Specialists in Oral and Maxillofacial Surgery and Traumatology correctly answered 53.9%. Interviewees with experience between 6 and 10 years correctly answered 58.2%. In identifying fracture traces, 46.1% of the questions were answered correctly. In terms of location, 5.6% of interviewees answered wrongly while 14.2% answered wrongly regarding classification. Conclusion: 3D computed tomography did not prove to be a reliable image for diagnosing mandibular fractures when used alone. This made necessary an association with axial, sagittal and coronal tomographic sections

Humans , Male , Female , Diagnostic Imaging , Tomography, X-Ray Computed , Surveys and Questionnaires , Imaging, Three-Dimensional , Mandibular Fractures
Edumecentro ; 13(4): 274-287, 2021.
Article in Spanish | LILACS | ID: biblio-1345962


RESUMEN Introducción: la enfermedad por SARS-Cov-2 refuerza la importancia del uso de las nuevas tecnologías de la información y las comunicaciones en función del desarrollo e implementación de sistemas de inteligencia artificial que favorecen el diagnóstico. Objetivo: describir la posibilidad del uso de la inteligencia artificial como una herramienta en la imagenología para los pacientes positivos a la COVID-19. Métodos: se realizó una revisión de fuentes bibliográficas en Infomed, SciELO, PubMed y Google Académico, comprendidas en los años 2015 al 2020 con el uso de palabras claves: coronavirus, COVID-19, neumonía, radiografía e inteligencia artificial. Se seleccionaron 28 documentos por su pertinencia en el estudio. Desarrollo: la creación de sistemas de inteligencia artificial que ayuden al diagnóstico médico requiere un enfoque interprofesional de la ciencia y constituye una de las líneas de trabajo en Cuba durante la pandemia. Una condición indispensable para la introducción de la inteligencia artificial en el diagnóstico radiológico es la capacitación que deben recibir los médicos para interactuar con ella, a través de un proceso formativo que incluya una evaluación y explicación de la calidad de los datos asociada tanto al aprendizaje como a las nuevas predicciones. Conclusiones: la utilización de inteligencia artificial mejorará el rendimiento del radiólogo para distinguir la COVID-19; la integración de estas tecnologías en el flujo de trabajo clínico de rutina puede ayudar a los radiólogos a diagnosticar con precisión.

ABSTRACT Introduction: SARS-Cov-2 disease reinforces the importance of the use of new information and communication technologies based on the development and implementation of artificial intelligence systems that favor diagnosis. Objective: to describe the possibility of using artificial intelligence as a tool in imaging for COVID-19 positive patients. Methods: a review of bibliographic sources was carried out in Infomed, SciELO, PubMed and Google Scholar, from 2015 to 2020 with the use of keywords: coronavirus, COVID-19, pneumonia, radiography and artificial intelligence. 28 documents were selected for their relevance in the study. Development: the creation of artificial intelligence systems that help medical diagnosis requires an interprofessional approach to science and constitutes one of the lines of work in Cuba during the pandemic. An essential condition for the introduction of artificial intelligence in radiological diagnosis is the training that doctors must receive to interact with it, through a training process that includes an evaluation and explanation of the quality of the data associated with both learning and to new predictions. Conclusions: the use of artificial intelligence will improve the radiologist's performance to distinguish COVID-19; integrating these technologies into routine clinical workflow can help radiologists diagnose accurately.

Radiology , Artificial Intelligence , Coronavirus Infections , Imaging, Three-Dimensional
Rev. Asoc. Odontol. Argent ; 109(3): 177-184, dic. 2021. ilus
Article in Spanish | LILACS | ID: biblio-1372479


Objetivo: Describir en un caso clínico una nueva técni- ca para la localización y la remoción de agujas fracturadas du- rante la anestesia odontológica mediante planificación virtual. Caso clínico: Una paciente de género femenino de 52 años de edad concurre a la Cátedra de Cirugía y Traumatolo- gía Bucomaxilofacial I de la Facultad de Odontología de la Universidad de Buenos Aires y relata que dos meses atrás, durante la atención odontológica, se produjo la fractura de la aguja durante la anestesia troncular mandibular. Se realiza diagnóstico y planificación virtual para conocer la ubicación exacta de la aguja y se confecciona un modelo estereolito- gráfico y una guía quirúrgica individualizada para removerla. El uso de una guía quirúrgica individualizada y confeccio- nada mediante planificación virtual permitió ubicar la aguja tridimensionalmente y con mayor precisión en espacios pro- fundos y disminuir tiempos operatorios (AU)

Aim: To describe in a clinical case a new virtual plan- ning technique for locating and removing a fractured dental anesthetic needle. Clinical case: A 52-year-old patient visited the De- partment of Oral and Maxillofacial Surgery I (School of Dentistry, University of Buenos Aires) with a retained den- tal needle in the pterygomandibular space. The needle had fractured during inferior alveolar nerve block two months previously. Virtual diagnosis and planning were performed to locate the needle and a stereolithographic model and a customized surgical guide were prepared. The use of cus- tomized surgical guides prepared by virtual planning ena- bled precise location of the dental needle in deep spaces and reduced operating times (AU)

Humans , Female , Middle Aged , Needlestick Injuries , Imaging, Three-Dimensional , Cone-Beam Computed Tomography , Foreign Bodies , Anesthesia, Dental/adverse effects , Argentina , Schools, Dental , Oral Surgical Procedures/methods , Stereolithography
Rev. medica electron ; 43(4): 1045-1055, 2021.
Article in Spanish | LILACS, CUMED | ID: biblio-1341534


RESUMEN La cardiopatía isquémica y los accidentes cerebrovasculares son la primera causa de muerte en el mundo. La enfermedad cardiovascular de origen ateroesclerótico es un problema internacional de salud, que constituye una carga social, sanitaria y económica. Se realizó un análisis de las principales guías internacionales sobre dislipoproteinemias y su manejo, como las de la Sociedad Europea de Cardiología y las del Colegio Americano de Cardiología/Asociación Americana del Corazón. También, de los principales artículos publicados en los últimos cinco años sobre el manejo de la hipercolesterolemia, de los cuales se tomaron 20 publicaciones en Medline, Google Académico y SciELO. Las mencionadas guías reúnen las recomendaciones de sus respectivas organizaciones y las combinan con nuevas. Ambas mantienen el uso de scores de riesgo y discrepan sobre la imagenología en la determinación del tratamiento, al igual que en el uso de drogas no estatinas. Se plantea que la mejor intervención para prevenir la enfermedad cardiovascular es la promoción de un estilo de vida saludable (AU).

ABSTRACT Ischemic cardiomyopathy and cerebrovascular stroke are the first causes of death in the world. Cardiovascular disease of atherosclerotic origins is an international health problem that is also a social, sanitary and economic burden. The authors analyzed the main international guidelines on dyslipoproteinemia, like the ones from the European Society of Cardiology and the American College of Cardiology/American Heart Association. They also considered the main articles published in the last five years on the management of hypercholesterolemia and chose 20 of them available in Medline, Google Scholar and SciELO. The before-mentioned guidelines gather the recommendations of their own organizations, and combine them with new ones. They both keep using risk scores on and differ on medical imaging determining the treatment, and also in the use of non-statin drugs. It is stated that the better intervention to prevent cardiovascular disease is the promotion of a healthy lifestyle (AU).

Humans , Male , Female , Cardiovascular Diseases/classification , Hypercholesterolemia/epidemiology , Review Literature as Topic , Hydroxymethylglutaryl-CoA Reductase Inhibitors , Imaging, Three-Dimensional/methods , Hypercholesterolemia/diagnosis , Hypercholesterolemia/therapy
Rev. bras. med. esporte ; 27(4): 381-385, Aug. 2021. tab, graf
Article in English | LILACS | ID: biblio-1288606


ABSTRACT Background: Objective: The study of sports biomechanics in sports medicine usually requires a special image analysis system (software) to obtain 3D kinematics data. Taking the swimming project in sports medicine as an example, 3D water images in water have always been relatively complicated and difficult. As light travels in different media, it will refract and reflect. When testing underwater movements, if only a land camera or an underwater camera is used for testing, the error caused by light refraction will be larger, which will affect the accuracy of the test data even more. Methods: Taking breaststroke movement as an example, a three-dimensional measurement method based on the Kwon3D movement analysis system is introduced. This method is different from the simple underwater camera test. It is a three-dimensional test method combining a land camera and an underwater camera. Two underwater cameras and two land cameras were used to simultaneously calibrate the water and underwater space with the same calibration frame in the experiment after analyzing and verifying the accuracy of 3D reconstruction. Results: The comprehensive reconstruction error is small, and the average relative error is less than 1%. Conclusions: The application of three-dimensional image analysis technology of vision systems in sports medicine is reasonable and worth promoting. Level of evidence II; Therapeutic studies - investigation of treatment results.

RESUMO Antecedente: Objetivo: O estudo da biomecânica do esporte na medicina esportiva geralmente requer o uso de um sistema especial de análise de imagens (software) para a obtenção de dados cinemáticos 3D. Tomando o projeto de natação na medicina esportiva como exemplo, a análise de imagens 3D da água na água sempre foi um teste relativamente complicado e difícil. À medida que a luz viaja em diferentes meios, ela refratará e refletirá. Ao testar movimentos subaquáticos, se apenas uma câmera terrestre ou subaquática for usada para o teste, o erro causado pela refração da luz será maior, o que afetará a precisão dos dados de teste ainda mais. Métodos: Tomando o movimento de nado peito como exemplo, um método de medição tridimensional baseado no sistema de análise de movimento Kwon3D é introduzido. Este método é diferente do teste simples de câmera subaquática. É um método de teste tridimensional que combina uma câmera terrestre e uma câmera subaquática. No experimento, duas câmeras subaquáticas e duas câmeras terrestres foram usadas para calibrar simultaneamente a água e o espaço subaquático com o mesmo quadro de calibração. Depois de analisar e verificar a precisão da reconstrução 3D. Resultados: O erro de reconstrução abrangente é pequeno e o erro relativo médio é inferior a 1% Conclusões: A aplicação da tecnologia de análise de imagem tridimensional do sistema de visão na medicina esportiva é razoável e vale a pena promover. Nível de evidência II; Estudos terapêuticos- investigação dos resultados do tratamento.

RESUMEN Antecedente: Objetivo: El estudio de la biomecánica del deporte en la medicina deportiva generalmente requiere el uso de un sistema de análisis de imágenes especial (software) para obtener datos de cinemática 3D. Tomando como ejemplo el proyecto de natación en medicina deportiva, el análisis de imágenes de agua en 3D en el agua siempre ha sido una prueba relativamente complicada y difícil. A medida que la luz viaja en diferentes medios, se refractará y reflejará. Al probar los movimientos bajo el agua, si solo se utiliza una cámara terrestre o una cámara submarina para realizar la prueba, el error causado por la refracción de la luz será mayor, lo que afectará aún más la precisión de los datos de la prueba. Métodos: tomando como ejemplo el movimiento de la brazada, se introduce un método de medición tridimensional basado en el sistema de análisis de movimiento Kwon3D. Este método es diferente de la simple prueba de cámara subacuática. Es un método de prueba tridimensional que combina una cámara terrestre y una cámara submarina. En el experimento, se utilizaron dos cámaras submarinas y dos cámaras terrestres para calibrar simultáneamente el agua y el espacio submarino con el mismo marco de calibración. Después de analizar y verificar la precisión de la reconstrucción 3D. Resultados: el error de reconstrucción integral es pequeño y el error relativo promedio es inferior al 1%. Conclusiones: La aplicación de la tecnología de análisis de imágenes tridimensionales del sistema de visión en la medicina deportiva es razonable y vale la pena promoverla. Nivel de evidencia II; Estudios terapéuticos- investigación de los resultados del tratamiento.

Humans , Swimming/physiology , Video Recording/methods , Imaging, Three-Dimensional/methods , Biomechanical Phenomena/physiology , Algorithms , Calibration , Water
Rev. bras. med. esporte ; 27(4): 390-394, Aug. 2021. tab, graf
Article in English | LILACS | ID: biblio-1288600


ABSTRACT Introduction: Basketball sports will effect on the morphology and structure of the hand bones and joints. Objective: The article selected nine professional basketball players (basketball group) and 11 non-basketball players (control group) in the provincial youth team. A 64-row spiral computed tomography scan was used to scan the wrist and three-dimensional reconstruction. The volume of each carpal bone and the computed tomography value (bone density) were measured. Methods: To explore the influence of basketball sports on the hand bones and joints' morphological structure, the paper analyzes the structural characteristics of the computed tomography images of young male basketball players' wrist bones. Results: Compared with the carpal bones in the control group, the volume of the right navicular bone and the small polygonal bone, the left-hand navicular bone, the large triangular bone, and the small polygonal bone in the basketball group increased significantly (P<0.05). Conclusions: Basketball can increase the volume of the part of the wrist bones of adolescent male athletes and reduce the bone density; the morphological structure of the non-smashing wrist bones of basketball players has similar changes to that of the spikers. Level of evidence II; Therapeutic studies - investigation of treatment results.

RESUMO Introdução: O basquetebol afetará a morfologia e a estrutura dos ossos e articulações da mão. Objetivo: o artigo selecionou nove jogadores profissionais de basquete (grupo de basquete) e 11 não jogadores de basquete (grupo de controle) da equipe juvenil da província. Uma tomografia computadorizada espiral de 64 linhas foi usada para digitalizar o punho e a reconstrução tridimensional. O volume de cada osso do carpo e o valor da tomografia computadorizada (densidade óssea) foram medidos. Métodos: Para explorar a influência dos esportes de basquete sobre os ossos da mão e a estrutura morfológica das articulações, o artigo analisa as características estruturais das imagens de tomografia computadorizada de ossos do punho de jovens jogadores de basquete do sexo masculino. Resultados: Em comparação com os ossos do carpo no grupo de controle, o volume do osso navicular direito e o osso poligonal pequeno, o osso navicular esquerdo, o osso triangular grande e o osso poligonal pequeno no grupo de basquete aumentaram significativamente (P <0,05). Conclusões: O basquete pode aumentar o volume dos ossos do punho de atletas adolescentes do sexo masculino e reduzir a densidade óssea; a estrutura morfológica dos ossos do pulso que não se quebram em jogadores de basquete tem mudanças semelhantes às dos espigões. Nível de evidência II; Estudos terapêuticos- investigação dos resultados do tratamento.

RESUMEN Introducción: el baloncesto afectará la morfología y la estructura de los huesos y articulaciones de la mano. Objetivo: El artículo seleccionó nueve jugadores de baloncesto profesionales (grupo de baloncesto) y 11 jugadores no baloncesto (grupo de control) en el equipo juvenil provincial. Se utilizó una tomografía computarizada en espiral de 64 filas para escanear la muñeca y la reconstrucción tridimensional. Se midieron el volumen de cada hueso del carpo y el valor de la tomografía computarizada (densidad ósea). Métodos: Para explorar la influencia de los deportes de baloncesto en la estructura morfológica de los huesos de la mano y las articulaciones, el artículo analiza las características estructurales de las imágenes de tomografía computarizada de los huesos de la muñeca de los jóvenes jugadores de baloncesto. Resultados: En comparación con los huesos del carpo en el grupo de control, el volumen del hueso navicular derecho y el hueso poligonal pequeño, el hueso navicular izquierdo, el hueso triangular grande y el hueso poligonal pequeño en el grupo de baloncesto aumentaron significativamente (P <0,05). Conclusiones: El baloncesto puede aumentar el volumen de los huesos de la muñeca de los deportistas varones adolescentes y reducir la densidad ósea; la estructura morfológica de los huesos de las muñecas que no se rompen de los jugadores de baloncesto tiene cambios similares a los de los atacantes. Nivel de evidencia II; Estudios terapéuticos- investigación de los resultados del tratamiento.

Humans , Male , Wrist Joint/diagnostic imaging , Basketball , Carpal Bones/diagnostic imaging , Bone Density/physiology , Athletes , Wrist Joint/growth & development , Algorithms , Adaptation, Physiological , Carpal Bones/growth & development , Tomography, X-Ray Computed/methods , Imaging, Three-Dimensional/methods
Arq. bras. med. vet. zootec. (Online) ; 73(4): 861-867, Jul.-Aug. 2021. ilus
Article in English | LILACS, VETINDEX | ID: biblio-1285260


The aim of this study was to evaluate the anatomical structures of the skulls of peccaries to establish the basis for their clinical study and future preclinical research. Ten skulls of adult peccaries were subjected to tomographic examination. The data obtained were processed via three-dimensional image reconstruction software (3D images). The reconstructions obtained from the neurocranium of the studied specimens allowed the identification and description of the following structures: nasal bone, frontal bone, parietal bones, incisor bone, maxillary bone, zygomatic bone, temporal bone, palatal bone, occipital bone, vomer bone, pterygoid bone, sphenoid bone, paranasal sinuses and orbit. Computed tomography proved to be an important diagnostic tool in the investigation of the skull of this species, allowing the acquisition of anatomical values not yet documented for the species in the literature.(AU)

O objetivo deste estudo foi avaliar as estruturas anatômicas dos crânios de catetos, a fim de se estabelecerem as bases para seu estudo clínico e futuras pesquisas pré-clínicas. Dez crânios de catetos adultos foram submetidos a exame tomográfico. Os dados obtidos foram introduzidos em um software de reconstrução de imagens tridimensionais (imagens em 3D). As reconstruções obtidas do neurocrânio dos espécimes estudados permitiram a identificação e a descrição das seguintes estruturas: osso nasal, osso frontal, ossos parietais, osso incisivo, osso maxilar, osso zigomático, osso temporal, osso palatino, osso occipital, osso vômer, osso pterigoide, osso esfenoide, seios paranasais e órbita. A tomografia computadorizada mostrou-se como uma ferramenta diagnóstica importante na investigação do crânio dessa espécie, permitindo a aquisição de valores anatômicos ainda não documentados para a espécie na literatura.(AU)

Animals , Artiodactyla/anatomy & histology , Skull/anatomy & histology , Skull/diagnostic imaging , Tomography, X-Ray Computed/veterinary , Imaging, Three-Dimensional/veterinary , Printing, Three-Dimensional
Rev. Assoc. Med. Bras. (1992) ; 67(6): 816-821, June 2021. tab, graf
Article in English | LILACS | ID: biblio-1346905


SUMMARY OBJECTIVE: Use Lead-DBS software to analyze stereotactical surgical outcome of an operated population and demonstrate that small target deviations do not compromise the stimulation of desired structures, even with small amperages. METHODS: Image exams of patients submitted to deep brain stimulation for movement disorders treatment were processed in Lead-DBS software. Electrode stereotactic coordinates were subtracted from the planned target and those deviations, compared among different anatomical targets and sides operated firstly and secondly. We also quantified the frequency of relation between the activated tissue volume and the planned target through computer simulations. RESULTS: None of the 16 electrodes were exactly implanted at the planned coordinates. A stimulation of 3 mA reached 62.5% of the times the planned coordinates, rising to 68.75% with a 3,5 mA. No statistical significance was demonstrated in any comparison of laterality and anatomical sites. CONCLUSIONS: The simulation of small amperage fields could reach the intended target even when electrode placement is suboptimal. Furthermore, such a goal can be achieved without overlapping the volume of activated tissue with undesired structures. Software Lead-DBS proved to be a valuable complementary asset for surgical stereotactical result assessment.

Humans , Deep Brain Stimulation , Magnetic Resonance Imaging , Imaging, Three-Dimensional , Electrodes, Implanted , Motivation
Rev. bras. med. esporte ; 27(spe2): 104-107, Apr.-June 2021. tab, graf
Article in English | LILACS | ID: biblio-1280098


ABSTRACT With the rapid development and application of computer technology, the application of computer science knowledge in basketball is also more and more extensive. Based on genetic algorithm and the background subtraction method, video analysis and 3D detection simulation model of shot jump action precision were constructed in this study. According to the genetic algorithm search method, jump shot precision was analyzed, and the problems encountered in the actual shooting process of basketball players were studied and solved. The results show that this study is necessary and feasible.

RESUMO Com o rápido desenvolvimento e aplicação da tecnologia da computação, a aplicação do conhecimento da ciência da computação no basquete também vem crescendo cada vez mais. Com base no algoritmo genético e no método da subtração de fundo, construiu-se um modelo de análise de vídeo e simulação de detecção 3D para a precisão de arremesso. De acordo com o método de busca do algoritmo genético, analisou-se a precisão do arremesso, e os problemas encontrados no processo de arremesso dos jogadores de basquete foram estudados e resolvidos. Os resultados mostram que este estudo é necessário e viável.

RESUMEN Con el rápido desarrollo y aplicación de la tecnología de la computación, la aplicación del conocimiento de la ciencia de la computación en el baloncesto también viene creciendo cada vez más. Basándose en el algoritmo genético y en el método de la sustracción de fondo, se construyó un modelo de análisis de video y simulación de detección 3D para la precisión de lanzamiento. De acuerdo con el método de búsqueda del algoritmo genético, se analizó la precisión del lanzamiento, y los problemas encontrados en el proceso de lanzamiento de los jugadores de baloncesto fueron estudiados y resueltos. Los resultados muestran que este estudio es necesario y viable.

Humans , Basketball , Simulation Exercise/methods , Videotape Recording , Algorithms , Imaging, Three-Dimensional