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1.
Zhonghua Yi Xue Za Zhi ; 101(21): 1566-1571, 2021 Jun 08.
Artigo em Chinês | MEDLINE | ID: mdl-34098683

RESUMO

Objective: To evaluate the transcranial sonographic characteristics in patients with Parkinson's disease (PD) with symptoms of restless legs syndrome (RLS). Methods: Patients with diagnosis of definite PD from the Second Affiliated Hospital of Soochow University and 3 other participating hospitals between September 2018 and December 2019 were consecutively enrolled. Concurrent RLS symptoms were determined using Non-motor Symptoms Questionnaire. Transcranial sonography (TCS) and clinical assessments were performed during the same time and the related variables were compared between the two groups using t-test, non-parametric test, Chi-square test and Spearman correlation analysis, respectively. Results: Among 349 patients with PD, the prevalence of RLS symptoms was 22.6%. Compared to patients without RLS symptoms, those with RLS had longer disease duration (43.0 (24.0, 91.0) months vs 37.0 (20.0, 60.0) months, P<0.05) and higher Hoehn-Yahr stage (2.5 (2.0, 3.0) vs 2.0 (1.5, 2.5), P<0.01).TCS revealed that patients with RLS symptoms were more likely to have abnormality in the raphe nucleus (21.50% vs 7.78%, χ²=15.9, P<0.001) and increased third ventricle width ((6.22±1.97) mm vs (5.16±1.90) mm, P<0.001). No significant differences were found regarding parameters of substantia nigra. Conclusions: Concurrent RLS symptoms are common in PD patients. Abnormal echogenicity of raphe nucleus and increased third ventricle width could be characteristics of TCS in PD patients with RLS symptoms.


Assuntos
Doença de Parkinson , Síndrome das Pernas Inquietas , Humanos , Doença de Parkinson/diagnóstico por imagem , Síndrome das Pernas Inquietas/diagnóstico por imagem , Substância Negra , Inquéritos e Questionários , Ultrassonografia
2.
Pan Afr Med J ; 38: 241, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34104289

RESUMO

Ganglioneuromas are benign slow-growing lesions that arise from sympathetic ganglion cells. They are usually found incidentally. Ultrasound and magnetic resonance imaging (MRI), provides only an unspecified diagnosis and it has to be confirmed by pathologic studies. Complete surgical excision is believed to be the curative treatment for symptomatic lesions. In the literature, the pelvic location reported is exceptional. We report a case of laparoscopic assisted excision of a retrorectal presacral ganglioneuroma for 22-year-old female patient.


Assuntos
Ganglioneuroma/cirurgia , Laparoscopia , Neoplasias Retais/cirurgia , Feminino , Ganglioneuroma/diagnóstico por imagem , Ganglioneuroma/patologia , Humanos , Imageamento por Ressonância Magnética , Neoplasias Retais/diagnóstico por imagem , Neoplasias Retais/patologia , Ultrassonografia , Adulto Jovem
3.
Sensors (Basel) ; 21(10)2021 May 19.
Artigo em Inglês | MEDLINE | ID: mdl-34069613

RESUMO

As a well-known medical imaging methodology, intravascular ultrasound (IVUS) imaging plays a critical role in diagnosis, treatment guidance and post-treatment assessment of coronary artery diseases. By cannulating a miniature ultrasound transducer mounted catheter into an artery, the vessel lumen opening, vessel wall morphology and other associated blood and vessel properties can be precisely assessed in IVUS imaging. Ultrasound transducer, as the key component of an IVUS system, is critical in determining the IVUS imaging performance. In recent years, a wide range of achievements in ultrasound transducers have been reported for IVUS imaging applications. Herein, a comprehensive review is given on recent advances in ultrasound transducers for IVUS imaging. Firstly, a fundamental understanding of IVUS imaging principle, evaluation parameters and IVUS catheter are summarized. Secondly, three different types of ultrasound transducers (piezoelectric ultrasound transducer, piezoelectric micromachined ultrasound transducer and capacitive micromachined ultrasound transducer) for IVUS imaging are presented. Particularly, the recent advances in piezoelectric ultrasound transducer for IVUS imaging are extensively examined according to their different working mechanisms, configurations and materials adopted. Thirdly, IVUS-based multimodality intravascular imaging of atherosclerotic plaque is discussed. Finally, summary and perspectives on the future studies are highlighted for IVUS imaging applications.


Assuntos
Doença da Artéria Coronariana , Ultrassonografia de Intervenção , Doença da Artéria Coronariana/diagnóstico por imagem , Desenho de Equipamento , Humanos , Transdutores , Ultrassonografia
5.
Zhonghua Wei Zhong Bing Ji Jiu Yi Xue ; 33(5): 638-640, 2021 May.
Artigo em Chinês | MEDLINE | ID: mdl-34112310

RESUMO

In recent years, point of care ultrasound (POCUS) has developed rapidly in the fields of anesthesia and critical care. POCUS is widely used in clinic to monitor the function of human tissues and organs such as the heart, lungs, and diaphragm due to its visual, non-invasive, portable, and repeatable characters at the bedside. Diaphragm is an important structure to maintain respiratory function. Diaphragm paralysis or dysfunction can cause a significant decrease in inspiratory function. The patient's diaphragm function can be assessed through monitoring diaphragm thickness and activity by POCUS, and combined with other clinical indicators, the patient's recovery of respiratory function can be comprehensively evaluated, and rapidly identify the pathological conditions, such as diaphragm paralysis, diaphragm atrophy, diaphragmatic hypoplasia and amyotrophic lateral sclerosis. Dynamic evaluation of the process from diaphragmatic dysfunction to recovery can provide guidance for weaning and extubation, and real-time feedback on the treatment effect. This article reviews the ultrasound evaluation methods and clinical applications to the diaphragm, in order to guide clinicians to use relevant indicators to comprehensively evaluate the structure and function of the diaphragm, and then diagnose and treat diaphragm dysfunction, which may help making clinical decision.


Assuntos
Diafragma , Respiração Artificial , Extubação , Cuidados Críticos , Diafragma/diagnóstico por imagem , Humanos , Ultrassonografia
6.
Medicina (Kaunas) ; 57(5)2021 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-34065340

RESUMO

Background and Objectives: Ultrasound echo intensity (EI) of the lumbar multifidus muscle (LMM) could offer valuable insights regarding muscle quality in people with low back pain (LBP). However, whether the rater's experience noticeably influences the reliability and precision of LMM EI measurements has not been established. The aims of this study were to investigate the intra-rater and inter-rater reliability of LMM EI measurements, and to compare the reliability and SEM between a novice and an experienced rater. Materials and Methods: Twenty athletes (10 females, 10 males) with a history of LBP were included in this study. Transverse ultrasound images of LMM were taken at L5 in prone. LMM EI measurements were obtained bilaterally by tracing the maximum ROI representing the LMM cross-sectional area (CSA), avoiding the inclusion of bone or surrounding fascia. All measurements were performed by two novice raters and an experienced researcher. Each measurement was acquired by each rater three times for each side on three different images, and the average was used in the analyses. Raters were blinded to each other's measurements and the participant's clinical information. Intra-class correlation coefficients (ICCs) were obtained to assess the intra-rater and inter-rater reliability. Results: The intra-rater ICC values for the LMM measurements for the experienced rater were excellent (ICC all > 0.997). The inter-rater reliability ICC values showed moderate to excellent reliability (0.614 to 0.994) and agreement between the novice raters and the experienced rater, except for Novice 1 for the right LMM, which revealed lower ICCs and a wider 95% CI. Intra-rater and inter-rater reliability results were similar when separately looking at the right and left side of the muscle and participant gender. Conclusions: Our findings support the clinical use of ultrasound imaging for the assessment of LMM EI in individuals with LBP.


Assuntos
Dor Lombar , Músculos Paraespinais , Feminino , Humanos , Dor Lombar/diagnóstico por imagem , Região Lombossacral/diagnóstico por imagem , Masculino , Músculos Paraespinais/diagnóstico por imagem , Reprodutibilidade dos Testes , Ultrassonografia
7.
Sensors (Basel) ; 21(9)2021 May 06.
Artigo em Inglês | MEDLINE | ID: mdl-34066343

RESUMO

The objective of this study was to evaluate the reliability of four methods of assessing vastus lateralis (VL) stiffness, and to describe the influence of structural characteristics on them. The stiffness of the dominant lower-limb's VL was evaluated in 53 healthy participants (28.4 ± 9.1 years) with shear wave elastography (SWE), strain elastography (SE), myotonometry and tensiomyography (TMG). The SWE, SE and myotonometry were performed at 50%, and TMG was assessed at 30%, of the length from the upper pole of the patella to the greater trochanter. The thickness of the VL, adipose tissue and superficial connective tissue was also measured with ultrasound. Three repeated measurements were acquired to assess reliability, using intraclass correlation coefficients (ICC). Pearson's correlation coefficients were calculated to determine the relationships between methodologic assessments and between structural characteristics and stiffness assessments of the VL. Myotonometry (ICC = 0.93; 95%-CI = 0.89,0.96) and TMG (ICC = 0.89; 95%-CI = 0.82,0.94) showed excellent inter-day reliability whereas with SWE (ICC = 0.62; 95%-CI = 0.41,0.77) and SE (ICC = 0.71; 95%-CI = 0.57,0.81) reliability was moderate. Significant correlations were found between myotonometry and VL thickness (r = 0.361; p = 0.008), adipose tissue thickness (r = -0.459; p = 0.001) and superficial connective tissue thickness (r = 0.340; p = 0.013). Myotonometry and TMG showed the best reliability values, although myotonometry stiffness values were influenced by the structural variables of the supra-adjacent tissue.


Assuntos
Técnicas de Imagem por Elasticidade , Músculo Quadríceps , Objetivos , Humanos , Músculo Quadríceps/diagnóstico por imagem , Reprodutibilidade dos Testes , Ultrassonografia
8.
BMJ Case Rep ; 14(6)2021 Jun 02.
Artigo em Inglês | MEDLINE | ID: mdl-34083186

RESUMO

A 52-year-old woman was referred to our department with multiple discharging sinuses and swelling in the right flank and iliac region for the past year. Ultrasound revealed a large collection in the right psoas muscle with the sinus tract reaching up to the skin in the right iliac region. Despite repeated attempts at drainage, the collection continued to increase in size. CT was requested and revealed a large heterogeneous irregular collection in the right psoas with fistulous communication with the cecum and skin with the erosion of the overlying ilium. Because of lack of vertebral involvement, enhancing internal septations, non-visualisation of the appendix and feculent material admixed with mucinous discharge from the sinus, pseudomyxoma retroperitonei secondary to ruptured mucinous neoplasm of the appendix was suspected. Mucoid material at the local site was sent for histopathology, which confirmed our suspicion. Our treatment plan after ileostomy was cytoreductive surgery along with adjuvant radiotherapy (40 Gy in 20 fractions) with chemotherapy (5-fluorouracil and folinic acid given for 30 weeks, once a week). However, after ileostomy, the patient refused further treatment, citing financial reasons.


Assuntos
Apêndice , Pseudomixoma Peritoneal , Abscesso do Psoas , Feminino , Fluoruracila , Humanos , Leucovorina , Pessoa de Meia-Idade , Pseudomixoma Peritoneal/diagnóstico , Abscesso do Psoas/diagnóstico por imagem , Ultrassonografia
10.
Zhonghua Yi Xue Za Zhi ; 101(22): 1690-1694, 2021 Jun 15.
Artigo em Chinês | MEDLINE | ID: mdl-34126718

RESUMO

Objective: To evaluate the safety, short- and mid-term outcomes of percutaneous balloon mitral valvuloplasty (PBMV) guided by the ultrasound. Methods: In this retrospective study, medical data of 15 patients [9 males and 6 females, with an age of (53±13) years] with PBMV under the guidance of ultrasound in Heart Center of Henan Provincial People's Hospital between December 2016 and January 2019 were collected and reviewed. The short-and mid-term outcomes were analyzed. Results: PBMV was successfully performed in all the patients. One patient underwent surgical valve replacement due to severe mitral regurgitation, and the other 14 patients were all followed up successfully. The average follow-up time was (13.8±4.6) months. Comparisons of preoperative and postoperative data showed significant differences in valve area [(1.84±0.43) cm2 vs (0.89±0.24) cm2], left atrial pressure [(11.9±4.5) mmHg (1 mmHg=0.133 kPa) vs (21.9±6.0) mmHg] and mean mitral valve pressure gradient [(10.9±3.2) mmHg vs (20.1±3.6) mmHg](all P<0.01), with no significant differences in mitral regurgitation area (P=0.67). Postoperative follow-up showed that there were no significant differences in mitral valve area, regurgitation area and N-terminal pro-B-type natriuretic peptide (NT-proBNP) between short-and mid-term postoperatively (all P>0.05). There was no secondary operation due to mitral stenosis in 14 patients, and 3 patients with moderate or severe tricuspid regurgitation showed significant improvement, with gradually recovered cardiac function, and there were no deaths in these patients. Conclusion: PBMV guided by the ultrasound is feasible and effective, and exhibits favorable short-and mid-term outcomes.


Assuntos
Procedimentos Cirúrgicos Cardíacos , Estenose da Valva Mitral , Adulto , Idoso , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Valva Mitral/diagnóstico por imagem , Valva Mitral/cirurgia , Estenose da Valva Mitral/diagnóstico por imagem , Estenose da Valva Mitral/cirurgia , Estudos Retrospectivos , Resultado do Tratamento , Ultrassonografia
11.
Medicine (Baltimore) ; 100(19): e25412, 2021 May 14.
Artigo em Inglês | MEDLINE | ID: mdl-34106588

RESUMO

ABSTRACT: Pre-operative status of axillary lymph node (ALN) in early breast cancer is usually initially assessed by pre-operative ultrasound, followed by ultrasound-guided needle biopsy (UNB) confirmation. Patients with positive nodal status will undergo axillary lymph node dissection (ALND), while those with negative nodal status will have sentinel lymph node biopsy. ALND is associated with higher morbidity than Sentinel lymph node biopsy. The objective of this study is to determine if axillary ultrasound alone without UNB is predictive enough to assign patients to ALND and to identify ultrasound features that are significantly associated with pathologically positive ALN.383 newly diagnosed primary breast cancer patients between 2012 and 2014, and who had undergone pre-operative axillary ultrasound in University Malaya Medical Centre with a complete histopathology report of the axillary surgery were retrospectively reviewed. ALN was considered positive if it had any of these features: cortical thickening > 3 mm, loss of fatty hilum, hypoechoic solid node, mass-like appearance, round shape and lymph node size > 5 mm. Post-operative histopathological reports were then analyzed for nodal involvement.The overall sensitivity, specificity, and accuracy of pre-operative axillary ultrasound in detecting diseased nodes were 45.5%, 80.7%, and 60.3% respectively. The positive (PPV) and negative predictive values were 76.5% and 51.8%. Round shape, loss of fatty hilum and mass-like appearance had the highest PPVs of 87%, 83% and 81.6% respectively and significant odds ratios (ORs) of 5.22 (95% confidence interval [CI]: 1.52 - 17.86), ORs of 4.77 (95% CI: 2.62 - 8.70) and ORs of 4.26 (95% CI: 2.37 - 7.67) respectively (P-value < .05). Cortical thickness of > 3 mm was identified to have low PPV at 69.1%, ORs of 1.71 (95% CI: 0.86 - 3.41, P = .126).There are features on axillary ultrasound that confer high PPV for axillary involvement i.e. round shape, loss of fatty hilum, and mass-like appearance. In a low resource setting, these features may benefit from ALND without further pre-operative biopsies. However, pre-operative UNB for features with low PPV that is, cortical thickness > 3 mm should be considered to obviate the unnecessary morbidity associated with ALND.


Assuntos
Axila/diagnóstico por imagem , Neoplasias da Mama/diagnóstico por imagem , Neoplasias da Mama/patologia , Excisão de Linfonodo , Ultrassonografia , Feminino , Humanos , Biópsia Guiada por Imagem , Malásia , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Estudos Retrospectivos
12.
Rev Med Suisse ; 17(743): 1183-1185, 2021 Jun 16.
Artigo em Francês | MEDLINE | ID: mdl-34133097

RESUMO

Point-of-care ultrasound is a diagnostic tool that is gaining increasingly more ground in general and emergency practice; it allows the clinician to answer certain precise questions, including the presence of a small bowel occlusion. For this indication, ultrasound is useful in rapidly establishing a diagnosis and planning further work up.


Assuntos
Serviço Hospitalar de Emergência , Sistemas Automatizados de Assistência Junto ao Leito , Emergências , Humanos , Atenção Primária à Saúde , Ultrassonografia
13.
Nan Fang Yi Ke Da Xue Xue Bao ; 41(5): 649-656, 2021 May 20.
Artigo em Chinês | MEDLINE | ID: mdl-34134950

RESUMO

OBJECTIVE: To investigate the effect and safety of Escherichia coli (E.coli) expressing gas vesicle (GVs) for enhancing the efficacy of tumor ablation by high intensity focused ultrasound (HIFU) in tumor-bearing mice. OBJECTIVE: Thirty-two female BALB/c mice were used to establish mouse models bearing 4T1 tumor, which were randomized into GVs group [E.coli BL21 (AI)-PET28a-Arg1] and control group (PBS), and the efficacy of HIFU ablation was evaluated by examining coagulative necrotic volume and pathology of the tumors. Another 104 BALB/c mice were also randomly divided into GVs group and control group, and body weight changes of the mice were recorded on days 1, 4 and 15 after intravenous injection of E.coli containing GVs or PBS. White blood cells, red blood cells, hemoglobin and platelet counts and liver and renal function parameters of the mice were detected, and serum levels of TNF-α and IL-1ß were examined using ELISA. The pathological changes in the liver and spleen were evaluated using HE staining to assess the safety of the treatments. OBJECTIVE: HIFU ablation resulted in a significantly greater volume of coagulative necrosis and severer tissue damage in GVs group than in the control group (P < 0.001). In the 104 BALB/c mice without tumor cell inoculation, intravenous injection of E.coli expressing GVs, as compared with PBS, did not significantly affect body weight or cause changes in white blood cell, red blood cell and platelet counts or hemoglobin level (P1=0.59, P2=0.27, P3=0.76, P4=0.81). The liver and kidney function parameters (P1=0.12, P2=0.46, P3=0.62, P4=0.86) and serum levels of TNF-α and IL-1ß (P1=0.48, P2=0.56) were all comparable between GVs group and control group. No obvious pathological changes were detected in the liver and spleen tissues in either GVs group or the control group. OBJECTIVE: E.coli expressing GVs is safe for enhancing the ablation effect of HIFU in tumor-bearing mice.


Assuntos
Ablação por Ultrassom Focalizado de Alta Intensidade , Neoplasias , Animais , Escherichia coli , Feminino , Ablação por Ultrassom Focalizado de Alta Intensidade/efeitos adversos , Camundongos , Camundongos Endogâmicos BALB C , Ultrassonografia
14.
Nan Fang Yi Ke Da Xue Xue Bao ; 41(5): 767-774, 2021 May 20.
Artigo em Chinês | MEDLINE | ID: mdl-34134966

RESUMO

OBJECTIVE: To establish a 3D ultrasound imaging system based on pulse-triggered image acquisition using the linear probe on the VerasonicsTM vantage 128 platform and evaluate its performance in scanning standard phantom and human carotid artery. OBJECTIVE: The 3D ultrasound imaging system included 3 modules for probe motion control, image acquisition and storage, and 3D image reconstruction and display. To improve the precision of image acquisition, we used fixed frequency pulses to control the external trigger function combined with mechanical scanning. Voxel-based 3D reconstruction was used for image reconstruction and display. The user interface was designed to allow direct operations of the platform. We carried out scanning tests of standard ultrasound phantom and human carotid artery to evaluate the performance of this imaging system. OBJECTIVE: We successfully constructed a 3D ultrasound imaging system based on pulse-triggered image acquisition. The results of standard phantom and human carotid scanning tests showed that each module of the system was fully functional. The self-designed user interface of this ultrasound imaging system allowed full control of the system functions for original image acquisition, 3D image reconstruction, and display of cross-sections in 3 different views. OBJECTIVE: This 3D ultrasound imaging system achieves high-quality 3D ultrasound imaging and provides the basis for further study and clinical application of 3D ultrasound imaging.


Assuntos
Artérias Carótidas , Imageamento Tridimensional , Artérias Carótidas/diagnóstico por imagem , Humanos , Processamento de Imagem Assistida por Computador , Movimento (Física) , Imagens de Fantasmas , Ultrassonografia
15.
BMC Musculoskelet Disord ; 22(1): 537, 2021 Jun 12.
Artigo em Inglês | MEDLINE | ID: mdl-34118902

RESUMO

BACKGROUND: Before the role of shear wave elastography (SWE) and B mode ultrasound (US) in the diagnosis of different forms of idiopathic inflammatory myopathies (IIM) can be investigated, normative data is required. This study aimed to describe and then compare normative SWE and B mode ultrasound metrics of muscles in healthy controls and patients with IIM. METHODS: Twenty nine healthy adult controls and 10 IIM patients (5 with inclusion body myositis and 5 with necrotising autoimmune myopathy) underwent a full clinical examination, laboratory investigations, SWE and US measurements of selected proximal and distal limb muscles. Shear wave speed (SWS) and multiple US domains [echogenicity, fascial thickness, muscle bulk and power Doppler (PD)] were measured in both groups. RESULTS: In healthy controls (n = 29; mean age 46.60 ± 16.10; 44.8 % female), age was inversely correlated with SWS at the deltoid (stretch) (Rs. -0.40, p = 0.030) and PD score at the deltoid (rest) (Rs. -0.40, P = 0.032). Those ≥ 50 years old had a lower SWS at the deltoid (stretch) compared to the < 50 year group (2.92 m/s vs. 2.40 m/s, P = 0.032). Age correlated with increased echogenicity in the flexor digitorum profundus (Rs. 0.38, P = 0.045). Females had a smaller muscle bulk in the deltoid (P = 0.022). Body mass index (BMI) was inversely associated with SWS in the deltoid (stretch) (Rs - 0.45, P = 0.026), and positively correlated with echogenicity in the deltoid (Rs. 0.69, P = 0.026). In patients ≥50 years of age, patients with IIM (mean age 61.00 ± 8.18; females 20.0 %) had a higher proportion of abnormal echogenicity scores at the flexor digitorum profundus (FDP) (40.00 % vs. 14.30 %, P = 0.022) and tibialis anterior (TA) (80.00 % vs. 28.60 %, P = 0.004). Fascial thickness was lower in the FDP (0.63mm vs. 0.50mm, p = 0.012) and TA (0.58mm vs. 0.45mm, P = 0.001). CONCLUSIONS: Our findings suggest there is scope for US techniques to be useful for diagnostic screening of affected muscles in patients with IIM, especially in those with suspected inclusion body myositis or necrotising autoimmune myopathy. We provide normative data for future studies into SWE and US techniques in skeletal muscle. The differences between IIM patients and controls warrant further study in a broader IIM patient cohort.


Assuntos
Técnicas de Imagem por Elasticidade , Miosite , Adulto , Idoso , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Músculo Esquelético/diagnóstico por imagem , Miosite/diagnóstico por imagem , Ultrassonografia , Ultrassonografia Doppler
16.
Niger J Clin Pract ; 24(6): 892-895, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-34121738

RESUMO

Objective: The primary aim of this study was to assess the effects of a combination of the passive leg raising (PLR) and Trendelenburg positions on the cross-sectional area (CSA) of the right internal jugular vein (RIJV) using ultrasound measurement in awake patients. Methods: This prospective observational cross-over study measured the CSA of RIJV in patients in supine (Supine-I), Trendelenburg, Trendelenburg with passive leg raising (T + PLR position), and repeated supine position (Supine-II). The CSA and vertical and horizontal diameters of the RIJVs were compared before and after each position. Results: A total of 120 adult patients were enrolled in the study. The mean CSA of the RIJV significantly increased from 91.2 ± 31.7 mm2 to 110.4 ± 38.2 mm2 in the Trendelenburg position compared to the supine position (P < 0.05). However, there were no statistically significant differences in CSA were observed between the Trendelenburg and Trendelenburg + PLR positions. Conclusion: Although the PLR + Trendelenburg position increased the jugular vein diameter relative to the supine position, its clinical usefulness is limited as this increase was still lower than that achieved with the Trendelenburg position alone.


Assuntos
Veias Jugulares , Perna (Membro) , Adulto , Estudos Cross-Over , Decúbito Inclinado com Rebaixamento da Cabeça , Humanos , Veias Jugulares/diagnóstico por imagem , Decúbito Dorsal , Ultrassonografia
17.
Medicina (Kaunas) ; 57(6)2021 May 24.
Artigo em Inglês | MEDLINE | ID: mdl-34074037

RESUMO

Background and Objectives: Thyroid nodules are lumps of solid or liquid-filled tumors that form inside the thyroid gland, which can be malignant or benign. Our aim was to test whether the described features of the Thyroid Imaging Reporting and Data System (TI-RADS) could improve radiologists' decision making when integrated into a computer system. In this study, we developed a computer-aided diagnosis system integrated into multiple-instance learning (MIL) that would focus on benign-malignant classification. Data were available from the Universidad Nacional de Colombia. Materials and Methods: There were 99 cases (33 Benign and 66 malignant). In this study, the median filter and image binarization were used for image pre-processing and segmentation. The grey level co-occurrence matrix (GLCM) was used to extract seven ultrasound image features. These data were divided into 87% training and 13% validation sets. We compared the support vector machine (SVM) and artificial neural network (ANN) classification algorithms based on their accuracy score, sensitivity, and specificity. The outcome measure was whether the thyroid nodule was benign or malignant. We also developed a graphic user interface (GUI) to display the image features that would help radiologists with decision making. Results: ANN and SVM achieved an accuracy of 75% and 96% respectively. SVM outperformed all the other models on all performance metrics, achieving higher accuracy, sensitivity, and specificity score. Conclusions: Our study suggests promising results from MIL in thyroid cancer detection. Further testing with external data is required before our classification model can be employed in practice.


Assuntos
Nódulo da Glândula Tireoide , Colômbia , Diagnóstico por Computador , Humanos , Aprendizado de Máquina , Sensibilidade e Especificidade , Nódulo da Glândula Tireoide/diagnóstico por imagem , Ultrassonografia
18.
Wiad Lek ; 74(5): 1158-1163, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34090283

RESUMO

OBJECTIVE: The aim: Studying the features of the structure and function of the heart in athletes and identifying the factors that influence the development of these changes. PATIENTS AND METHODS: Materials and methods: The study included 54 athletes, 29 men and 25 women. The ultrasound study was performed according to standard methods with determining the size of the main structures of the heart, indicators normalized to body surface area, height. RESULTS: Results: The heart of dilatation and hypertrophy of the left ventricular myocardium were found in 25.93% of the athletes. When comparing the diameter of the left ventricle of individual athletes with the average values of the norm, their excess was found in 94.44% of athletes. The Odds ratio (OR) of the relationship between left ventricle diameter (LVd) and time of the exercise less than 10 y was 16.13, time of the exercise less than 5 y - 0.17 (p <0.05). OR of increase LVd to age less than 20 years was 3.56 units (p <0.05). The ejection fraction was above the normative mean in 75.93%, as well as the ratio of the periods of filling of the ventricles. CONCLUSION: Conclusions: The most common sign of an athlete's heart development was left ventricular dilatation, which occurred at a rate of 25 percent. Age less than 20 years and the duration of sports activities from 5 to 10 years is associated with a higher frequency of the athlete's heart.


Assuntos
Cardiomegalia Induzida por Exercícios , Esportes , Adulto , Feminino , Coração/diagnóstico por imagem , Ventrículos do Coração/diagnóstico por imagem , Humanos , Masculino , Ultrassonografia , Adulto Jovem
19.
J Pak Med Assoc ; 71(5): 1508-1510, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-34091648

RESUMO

The use of intra-operative ultrasound remains a largely underutilized option in brain tumour surgeries. The widespread availability of neuronavigation may be the reason why such a useful modality has become less popular even though recent advances in ultrasound technology have greatly improved its utility. The available literature also clearly shows that it offers additional advantages especially when used with neuronavigation. Herein the authors have briefly touched upon the available literature on the role of intraoperative ultrasound in brain tumour surgeries.


Assuntos
Neoplasias Encefálicas , Cirurgia Assistida por Computador , Neoplasias Encefálicas/diagnóstico por imagem , Neoplasias Encefálicas/cirurgia , Humanos , Neuronavegação , Procedimentos Neurocirúrgicos , Ultrassonografia
20.
Medicine (Baltimore) ; 100(22): e26238, 2021 Jun 04.
Artigo em Inglês | MEDLINE | ID: mdl-34087909

RESUMO

RATIONALE: Acute acalculous cholecystitis (AAC) is an extremely rare manifestation of systemic lupus erythematous (SLE). In previous reports, most of the patients were already diagnosed cases of SLE upon confirmation of AAC. PATIENT CONCERNS: A 24-year-old female who initially presented with fever and acute right upper quadrant abdominal pain. She had no medical history. DIAGNOSES: Abdominal ultrasonography and computed tomography (CT) showed gallbladder thickening with pericholecystic edema without gallstones or sludge, demonstrating acalculous cholecystitis. She revealed discoid rash on the both shin. Laboratory tests revealed pancytopenia. The titer of antinuclear antibody (ANA) was 1:1280. Anti-dsDNA antibody, anti-phospholipid antibody, anti-Sm antibody test, and proteinuria in 24 hours were positive. Both C3 and C4 were low. Echocardiography and chest CT showed pericardial effusion and pleural effusion. Using the 2019 European League Against Rheumatism/American College of Rheumatology (EULAR/ACR) classification criteria, the score was 31. We thought AAC of this case that was one of the initial manifestations of SLE. INTERVENTIONS: The patient was treated with high-dose prednisolone (1 mg/kg) and hydroxychloroquine 400 mg. OUTCOMES: After 4 days of administration of high-dose corticosteroid therapy, symptoms rapidly improved. After 35 days of the treatment, her symptoms and disease activity of SLE were markedly improved. LESSONS: Although AAC being the initial manifestation of SLE is very rare, prompt diagnosis and management with corticosteroids precluded surgical intervention. Physicians need to be cognizant of AAC as a disease flare and as a rare initial manifestation of SLE.


Assuntos
Colecistite Acalculosa/etiologia , Vesícula Biliar/patologia , Lúpus Eritematoso Sistêmico/complicações , Colecistite Acalculosa/diagnóstico , Doença Aguda , Adulto , Idoso , Anticorpos Antinucleares/sangue , Antirreumáticos/administração & dosagem , Antirreumáticos/uso terapêutico , Criança , Quimioterapia Combinada , Ecocardiografia/métodos , Feminino , Vesícula Biliar/diagnóstico por imagem , Glucocorticoides/administração & dosagem , Glucocorticoides/uso terapêutico , Humanos , Hidroxicloroquina/administração & dosagem , Hidroxicloroquina/uso terapêutico , Lúpus Eritematoso Sistêmico/sangue , Lúpus Eritematoso Sistêmico/diagnóstico , Lúpus Eritematoso Sistêmico/tratamento farmacológico , Derrame Pericárdico/diagnóstico , Derrame Pleural/diagnóstico , Prednisolona/administração & dosagem , Prednisolona/uso terapêutico , Proteinúria/diagnóstico , Proteinúria/etiologia , Tomografia Computadorizada por Raios X/métodos , Resultado do Tratamento , Ultrassonografia/métodos , Adulto Jovem
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