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1.
Beijing Da Xue Xue Bao Yi Xue Ban ; 52(5): 959-963, 2020 Oct 18.
Artigo em Chinês | MEDLINE | ID: mdl-33047737

RESUMO

OBJECTIVE: To improve the methods to synthesize and purify of optical-magnetic bimodal molecular probe of Gd-[4, 7-Bis-carboxymethyl-10-(2-fluorescein thioureaethyl)-1, 4, 7, 10-tetraaza-cyclododec-1-yl]-acetic acid complexes. METHODS: Target compound (7), optical-magnetic bimodal molecular molecular probe, was synthesized by the use of 1, 4, 7, 10-tetraazacyclododecane (1) as starting material via substitution reaction, hydrolysis reaction, coupling reaction and complexation reaction with metal. RESULTS: The synthetic route of Gd-[4, 7-Bis-carboxymethyl-10-(2-fluoresceinthioureaethyl)-1, 4, 7, 10-tetraaza-cyclododec-1-yl]-acetic acid complexes was improved. The optical-magnetic bimodal molecular probes were synthesized by substitution reaction, hydrolysis reaction, coupling reaction and complex reaction with metal respectively. For the improved route, the total yield could reach 34.6% which was higher than the original route (18.0%). The structures of those compounds were identified by 1H nuclear magnetic resonance, 13C nuclear magnetic resonance, and mass spectrometry. The improved route could avoid the uncontrollable disadvantage of the substitution reaction, this process could reduce the formation of impurities and made the purification process easier, and in the aspect of purification and separation, the preparative high-performance liquid chromatography with less sample loading and high cost was improved to a column chromatography with many sample loads and being easy to operate. Therefore, the use of column chromatography could be more conducive to mass production of the optical-magnetic bimodal molecular molecular probe. CONCLUSION: The improved synthetic route improves the controllability of the reaction conditions and makes it easier to purify and separate the compounds. At the same time, the improved synthetic route can increase the total yield significantly. The optical-magnetic bimodal molecular probe can combine the living magnetic resonance imaging with the in vitro optical imaging to realize the dual synchronous detection of magneto-optics, so that the detection results of the living magnetic resonance imaging and the in vitro optical imaging are mutually verified. In other words, this synthetic optical-magnetic bimodal molecular probe will make the experimental results more accurate and reliable. In subsequent biological experimental studies, the optical-magnetic bimodal molecular probe can be applied to related research of brain structure and function, and the probe can be used for the brain-related diseases researches, such as brain tumors. after intravenous administration, and thus the optical-magnetic bimodal molecular probe can play an important role in medical treatment of brain tumors and cerebrovascular diseases.


Assuntos
Ácido Acético , Imagem por Ressonância Magnética , Encéfalo , Espectroscopia de Ressonância Magnética , Sondas Moleculares
2.
Ned Tijdschr Tandheelkd ; 127(9): 481-486, 2020 Sep.
Artigo em Holandês | MEDLINE | ID: mdl-33011753

RESUMO

A 63-year-old male checked in 2 days after he had a shoulder MRI with complaints of a swollen and painful left eye. An anteroposterior X-ray of the orbit showed a foreign body of approximately 2.5 cm in de left maxillary sinus and orbit. 11 years ago, patient built a barn using an automatic staple-gun. He recalls having a little wound on his left cheek. His medical history showed that the man had undergone an MRI for his knee 3 years earlier and another for prostate complaints a year ago. Exact localization of the foreign body was confirmed by a CT scan of the orbit. The extraction of the foreign body has been performed by a combined approach, nasal by the otorhinolaryngologist and orbital by the oral and maxillofacial surgeon. This is the first case report on orbital penetration of a luxated foreign body after 3 elective MRI's.


Assuntos
Corpos Estranhos , Ombro , Humanos , Imagem por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Órbita , Tomografia Computadorizada por Raios X
3.
Zhonghua Kou Qiang Yi Xue Za Zhi ; 55(10): 772-777, 2020 Oct 09.
Artigo em Chinês | MEDLINE | ID: mdl-33045790

RESUMO

Objective: To evaluate the MRI and cone beam CT (CBCT) image registration methods of the temporomandibular joint (TMJ), and to explore the clinical application of the registered images and clinical diagnostic data for examining the relationship between the articular disc and condyle. Methods: Three patients with TMJ disc disposition were recruited at the Department of Oral and Maxillofacial Surgery, School of Stomatology, Wuhan University from January to March 2018. One patient was male, aged 30, and the others were females, aged 21 and 26 respectively. Three-dimensional (3D) images of CBCT and MRI of the TMJ were reconstructed and registered by using Mimics software. The images were then evaluated after the registration. The evaluation indicators selected were the area and volume of the articular disc, the position of the articular disc or the distance between the highest point of the condyle (point C) to the center point of the articular disc (point D), the distance between the last point of the joint disc (point P) to point C, as well as the angle between line CD and FH plane (∠DCF) at either opened- or closed-mouth condition. Results: The registration images of TMJ, at the closed- and opened-mouth positions of the 3 patients, showed the anatomical structures and interrelationships of the articular disc, articular nodules, joint fossa and condyle. Combined with clinical diagnosis, the difference of CD distances at the normal articular disc position was the minimum (1.94 mm), the difference of CD distances was small at the anterior disc displacement with non-reduction and larger with reduction. When the joint disc was in the opened-mouth position, ∠DCF angle was minimal (3.81°). The patients with anterior disc displacement with non-reduction showed the largest ∠DCF angle (48.03°). Conclusions: The position of the articular disc relative to the condyle and articular nodules, either at closed- or opened-mouth conditionds, could be accurately displayed after the image registration and fusion. The registration image not only could fully show the shape and position of the articular disc in different status from a 3D perspective, but also might provide basis for clinical study of TMJ disc displacement.


Assuntos
Disco da Articulação Temporomandibular , Transtornos da Articulação Temporomandibular , Adulto , Tomografia Computadorizada de Feixe Cônico , Feminino , Humanos , Imagem por Ressonância Magnética , Masculino , Articulação Temporomandibular/diagnóstico por imagem , Disco da Articulação Temporomandibular/diagnóstico por imagem , Transtornos da Articulação Temporomandibular/diagnóstico por imagem , Adulto Jovem
4.
Zhong Nan Da Xue Xue Bao Yi Xue Ban ; 45(9): 1109-1114, 2020.
Artigo em Inglês, Chinês | MEDLINE | ID: mdl-33051426

RESUMO

OBJECTIVES: To investigate volume changes of subcortical structures in patients with post-hepatitis B cirrhosis. METHODS: Thirty patients with post-hepatitis B cirrhosis (the cirrhosis group) and 24 age- and sex-matched healthy controls (the control group) were enrolled in this prospective study. All subjects underwent neuropsychological tests, blood biochemical determinations, and cerebral MRI. Volumes of 18 selected subcortical structures were automatically segmented and analyzed by the FreeSurfer. In the cirrhosis group, the relationships between abnormal subcortical volumes and clinical index or neurocognitive performance were investigated. The relationships between globus pallidus volumes and pallidal hyperintensity were also examined. RESULTS: Compared with the healthy controls, patients with post-hepatitis B cirrhosis displayed smaller bilateral putamen, amygdala, and nucleus accumbens volumes and larger bilateral globus pallidus volumes (P<0.001 or P=0.001). In the cirrhosis group, the volumes of left putamen and amygdala were negatively correlated with the number connection test-A (NCT-A)(left putamen r=-0.410, P=0.034; left amygdala r=-0.439, P=0.022), and the volumes of bilateral globus pallidus were positively correlated with pallidal index (PI) (left globus pallidus r=0.889, P<0.001; right globus pallidus r=0.900, P<0.001). CONCLUSIONS: Abnormalities of subcortical volumes appear bilaterally symmetrical in patients with post-hepatitis B cirrhosis. Atrophy of left putamen and amygdala might contribute to poor neurocognitive performance, and the manganese deposition might contribute to the increased globus pallidus volumes in patients with post-hepatitis B cirrhosis.


Assuntos
Hepatite B , Imagem por Ressonância Magnética , Hepatite B/complicações , Hepatite B/diagnóstico por imagem , Humanos , Cirrose Hepática/diagnóstico por imagem , Testes Neuropsicológicos , Estudos Prospectivos
5.
Zhong Nan Da Xue Xue Bao Yi Xue Ban ; 45(8): 980-987, 2020 Aug 28.
Artigo em Inglês, Chinês | MEDLINE | ID: mdl-33053542

RESUMO

OBJECTIVES: To evaluate the image quality of magnetic resonance 3D-sampling perfection with application-optimized contrasts by using different filp angle evolutions (3D-SPACE) sequence combined with different fusion methods in image fusion technology and the application value of fusion technology in preoperative evaluation of pituitary macroadenoma. METHODS: We collected MRI data of 43 patients with pituitary macroadenoma confirmed by Xiangya Hospital of Central South University, including collecting conventional MRI scan+enhancement, 3D-SPACE T2WI, and 3D-SPACE T1WI+C image data. 3D-SPACE sequence fusion was used in 6 combinations of 3D-SPACE T2WI/3D-SPACE T1WI+C, which were normal phase+normal phase, reverse phase+normal phase, normal phase+reverse phase, reverse phase+reverse phase, and normal phase pseudo color+normal phase, normal phase+normal phase pseudo color. Two senior radiologists used semi-quantitative methods to evaluate and compare the image quality of different combinations to obtain the best fusion mode. According to the degree of tumor invasion of the optic chiasma, oculomotor nerve, and cavernous sinus vessels, the MRI enhancement, 3D-SPACE T2WI, 3D-SPACE T1WI+C, and 2 3D-SPACE sequence fusion images were performed according to a three-level score system. Taking the intraoperative observation as the gold standard, Fisher probability exact method was used to compare different sequences to show the difference between the degree of invasion of the pituitary macroadenoma to the surrounding tissue and the intraoperative results. RESULTS: The Kruskal-Wallis H rank sum test showed that among the 6 image fusion modes, 3D-SPACE T1WI+C normal phase pseudo-color and 3D-SPACE T2WI normal phase fusion images had the best quality (P<0.05). No significance was observed among the 4 groups in the evaluation of consistency between the intraoperative findings and the graphically displayed extent of tumor invasion into oculomotor nerve (both level I, II, and III, P>0.05). The 3D-SPACE T2WI/3D-SPACE T1WI+C fusion images and the 3D-SPACE T2WI images showed better performance in the evaluation of consistency between the intraoperative findings and the graphically displayed extent of tumor invasion into optic chiasma (level II and III) than that in other two kinds of imaging data of the MRI enhancement group and 3D-SPACE T1WI+C group (P<0.01, P<0.05, respectively), with no significance being observed in level I. The 3D-SPACE T2WI/3D-SPACE T1WI+C fusion images and the 3D-SPACE T1WI+C images showed better performance in the evaluation of consistency between the intraoperative findings and the graphically displayed extent of tumor invasion into cavernous sinus vessels (level II) than that in other two kinds of imaging data of the MRI enhancement group and 3D-SPACE T2WI group (P<0.01, P<0.05, respectively), with no significance being observed in level I and III. CONCLUSIONS: Magnetic resonance 3D-SPACE sequence combined with image fusion technology is better than conventional magnetic resonance sequence for showing pituitary macroadenoma invasion of skull base vascular nerves. The invasion is better than the 3D-SPACE sequence alone, showing that the relationship between tumor and cavernous sinus vascular grade II better than the 3D-SPACE sequence alone. It has good application prospects for preoperative risk assessment and surgical plan.


Assuntos
Aumento da Imagem , Neoplasias Hipofisárias , Humanos , Imageamento Tridimensional , Imagem por Ressonância Magnética , Espectroscopia de Ressonância Magnética , Neoplasias Hipofisárias/diagnóstico por imagem , Neoplasias Hipofisárias/cirurgia
6.
Artigo em Chinês | MEDLINE | ID: mdl-33040499

RESUMO

Objective:To analyze the correlation of the degree of affective disorder and brain function changes by comparing the differences of resting-state functional Magnetic Resonance Imaging(rs-fMRI) between healthy volunteers without tinnitus and patients with tinnitus. Method:A analysis of 19 patients with tinnitus and 15 healthy volunteers without tinnitus. The patients were divided into mild group and severe group according to tinnitus handicap inventory(THI). Rs-fMRI was collected and the regional homogeneity(ReHo) analysis, amplitude of low-frequency fluctuation(ALFF) analysis, and fractional amplitude of low frequency fluctuation(fALFF) analysis of rs-fMRI were performed by DPABI software. Two-sample t-test of the ReHo value, ALFF value and fALFF value between the mild group and the control group, the severe group and the control group, were performed respectively. Result:The fALFF value of the left occipital gyrus in the mild group was higher than that in the control group, the difference was statistically significant(P<0.05), but there is no statistically significant difference of ALFF value and ReHo value between two groups. The ALFF value of the middle temporal gyrus(left), superior frontal gyrus(right), inferior frontal gyrus pars triangularis(left) and caudate nucleus(left) in the severe group were higher than those of the control group. But there was no significant difference in the fALFF value and the ReHo value. Conclusion:Different severity of affective disorder in patients with tinnitus have different areas of brain function abnormalities. Mild group was detected by fALFF analysis and the active brain area was the left middle occipital region. Severe group was detected by ALFF analysis. The active brain regions were left middle temporal gyrus, right superior frontal gyrus, left inferior frontal gyrus pars triangularis, and left caudate nucleus.


Assuntos
Zumbido , Encéfalo/diagnóstico por imagem , Mapeamento Encefálico , Humanos , Imagem por Ressonância Magnética , Transtornos do Humor , Zumbido/diagnóstico por imagem
7.
J Oral Facial Pain Headache ; 34(3): 222-235, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32870951

RESUMO

AIMS: To evaluate the available literature on structural and functional brain abnormalities in trigeminal neuralgia (TN) using several brain magnetic resonance imaging (MRI) techniques to further understand the central mechanisms of TN. METHODS: PubMed and Web of Science databases and the reference lists of identified studies were searched to identify potentially eligible studies through January 2019. Eligible articles were assessed for risk of bias and reviewed by two independent researchers. RESULTS: A total of 17 articles meeting the inclusion criteria were included in this study. The methodologic quality of the included studies was moderate. A total of 10 studies evaluated structural gray matter (GM) changes, and there was reasonable evidence that the GM of some specific brain regions changed in TN patients. In addition, there was a significant change in the root entry zone of the trigeminal nerve and in several regions of white matter. Functional changes in resting state were assessed in 9 studies. TN patients showed increased activation of resting state, and this activation was reduced in specific brain regions. There were several studies that focused on the correlation between functional parameters or strength of functional connectivity and clinical features (eg, visual analog score and pain duration), but each study focused on different brain areas or different functional connectivities within the brain. CONCLUSION: There is moderate evidence that TN patients show structural brain differences in specific cortical and subcortical regions. In addition, TN patients show changes in pain-related functional connections in the resting state. Future research should focus on longitudinal designs and integration of different brain-imaging techniques.


Assuntos
Neuralgia do Trigêmeo , Encéfalo , Substância Cinzenta , Humanos , Imagem por Ressonância Magnética , Neuroimagem
8.
Medicine (Baltimore) ; 99(35): e20932, 2020 Aug 28.
Artigo em Inglês | MEDLINE | ID: mdl-32871859

RESUMO

BACKGROUND: Accurate clinical staging of patients with cholangiocarcinoma (CCA) has a significant impact on treatment decisions. In this study, we aimed to compare the diagnostic value of magnetic resonance imaging (MRI) and 18-fludeoxyglucose positron emission tomography/computed tomography (F-FDG PET/CT) for staging of CCA. METHODS: We performed comprehensive systematic search in Web of Science (including MEDLINE) and Excerpta Medica Database for relevant diagnostic studies in accordance with the preferred reporting items for systematic reviews and meta-analysis statement. Based on data extracted from patient-based analysis, we calculated the pooled sensitivity and specificity with the 95% confidence intervals (CIs). In addition, the publication bias was assessed by Deek funnel plot of the asymmetry test. The potential heterogeneity was explored by threshold effect analysis and subgroup analyses. RESULTS: Thirty-two studies with 1626 patients were included in present analysis. In T stage, the pooled sensitivity and specificity of MRI were 0.90 (95% CI 0.86-0.93), 0.84 (95% CI 0.73-0.91) respectively. The pooled sensitivity and specificity of F-FDG PET/CT were 0.91 (95% CI 0.83-0.95) and 0.85 (0.64-0.95) respectively. In N stage, the pooled sensitivity and specificity of MRI were 0.64 (95% CI 0.52-0.74) and 0.69 (95% CI 0.51-0.87) respectively. The pooled sensitivity and specificity of PET/CT were 0.52 (95% CI 0.37-0.66) and 0.92 (95% CI 0.79-0.97) respectively. In M stage, the pooled sensitivity and specificity of F-FDG PET/CT were 0.56 (95% CI, 0.42-0.69) and 0.95 (95% CI, 0.91-0.97) respectively. The Deek test revealed no significant publication bias. No threshold effect was identified. The subgroup analyses showed that pathological type (extrahepatic cholangiocarcinoma vs hilar cholangiocarcinoma/intrahepatic cholangiocarcinoma), country (Asia vs non-Asia) and type of MRI (1.5T vs. 3.0T) were potential causes for the heterogeneity of MRI studies and country (Asia vs non-Asia) was a potential source for F-FDG PET/CT studies. CONCLUSION: The analysis suggested that both modalities provide reasonable diagnostic accuracy in T stage without significant differences between them. We recommend that both modalities be considered based on local availability and practice for the diagnosis of primary CCA tumors. In N stage, the diagnosis of lymph node metastasis (N) of CCA is still limited by MRI and F-FDG PET/CT, due to unsatisfactory diagnostic accuracy of both. Nevertheless, F-FDG PET/CT can be used to confirm lymph node metastasis while a negative result may not rule out metastasis. Furthermore, F-FDG PET/CT have a low sensitivity and a high specificity for detection of distant metastasis.


Assuntos
Neoplasias dos Ductos Biliares/patologia , Colangiocarcinoma/diagnóstico por imagem , Imagem por Ressonância Magnética/métodos , Tomografia por Emissão de Pósitrons/métodos , Idoso , Colangiocarcinoma/epidemiologia , Feminino , Fluordesoxiglucose F18/administração & dosagem , Humanos , Metástase Linfática/diagnóstico por imagem , Metástase Linfática/patologia , Masculino , Pessoa de Meia-Idade , Imagem Multimodal/métodos , Estadiamento de Neoplasias/métodos , Sensibilidade e Especificidade , Tomografia Computadorizada por Raios X/métodos
9.
Medicine (Baltimore) ; 99(35): e21437, 2020 Aug 28.
Artigo em Inglês | MEDLINE | ID: mdl-32871866

RESUMO

RATIONALE: Osteochondritis dissecans (OCD) lesions involve disruption of the osteochondral unit along articular surfaces, with significant potential for joint deterioration if not managed appropriately. PATIENT CONCERNS: A 15-year-old male presented with persistent and insidious right knee pain, which had worsened following a collision with another player during a basketball game, resulting in episodes of locking. DIAGNOSES: Magnetic resonance imaging revealed a lateral trochlear OCD extending into the anterior lateral femoral condyle. INTERVENTIONS: Chondral fraying was observed along the margins of the OCD. Retrograde drilling ensued with use of a 0.045-inch Kirschner wire throughout the lesion to a depth that would allow for penetration of healthy underlying subchondral bone to create an influx of healing factors. Three resorbable pegs were arthroscopically placed through an accessory portal overlying the lesion to stabilize the fracture and compress the gapped cartilage mantle to reduce flow of synovial fluid behind the lesion. Bipolar radiofrequency coblation was used to stabilize the chondral fraying and seal the gap along the periphery of the lesion. OUTCOMES: The patient was put on a nonweight bearing protocol for 6 weeks, after which crutches and brace were discontinued, but therapy persisted. Repeat imaging at 3 months demonstrated excellent interval healing. The patient was released to slowly engage impact activities. Although he returned at approximately 8 months postoperatively with a contralateral anterior cruciate ligament tear, he reported the operative knee with the OCD was doing extremely well. LESSONS: Radiofrequency coblation appears to be a viable strategy as an adjunct to management for OCD in children.


Assuntos
Articulação do Joelho/patologia , Osteocondrite Dissecante/diagnóstico por imagem , Osteocondrite Dissecante/terapia , Dor/etiologia , Terapia por Radiofrequência/métodos , Adolescente , Assistência ao Convalescente , Artroscopia/métodos , Cartilagem Articular/patologia , Terapia Combinada , Humanos , Traumatismos do Joelho/complicações , Articulação do Joelho/diagnóstico por imagem , Imagem por Ressonância Magnética/métodos , Masculino , Resultado do Tratamento
10.
Arthroscopy ; 36(9): 2401-2402, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32891242

RESUMO

Glenoid bone loss must be recognized when treating patients with shoulder instability to appropriately determine surgical treatment with either a soft-tissue stabilization or bony augmentation procedure. Three-dimensional reconstructions from computed tomography scans currently are the clinical gold standard for accurately evaluating glenoid bone loss. Novel advances in magnetic resonance imaging sequences and processing may allow for obtaining complete bony information from a single preoperative imaging study.


Assuntos
Instabilidade Articular , Articulação do Ombro , Humanos , Imageamento Tridimensional , Imagem por Ressonância Magnética , Escápula , Tomografia Computadorizada por Raios X
11.
Rev Med Liege ; 75(9): 562-564, 2020 Sep.
Artigo em Francês | MEDLINE | ID: mdl-32909404

RESUMO

We report the case of a 28-year-old male admitted to the emergency department for generalized seizure. A brain computed tomography (CT) revealed a ruptured dermoid cyst of the supra-tentorial stage (multiple drop-shaped fat structures were found in the subarachnoid space, basal cisterns and in ventricular system). An additional magnetic resonance imaging (MRI) was conducted to confirm the CT findings.


Assuntos
Cisto Dermoide , Adulto , Humanos , Imagem por Ressonância Magnética , Masculino , Ruptura Espontânea , Espaço Subaracnóideo , Tomografia Computadorizada por Raios X
12.
Zhonghua Yi Xue Za Zhi ; 100(33): 2607-2611, 2020 Sep 08.
Artigo em Chinês | MEDLINE | ID: mdl-32892607

RESUMO

Objective: To investigate the relationship between white matter lesions and spatial navigation ability in patients with mild cognitive impairment (MCI). Methods: A total of 32 MCI patients [age (66±11) years, 16 males and 16 females] who were treated in the Affiliated Drum Tower Hospital of Nanjing University Medical School from January 2015 to February 2018 were selected, and matched with age, gender and education level of 28 healthy controls (NC) [age (70±11) years, 19 males and 9 females] underwent spatial navigation ability test and neuropsychology scale evaluation. In the cross-sectional study, all subjects simultaneously underwent 3.0T magnetic resonance three-dimensional liquid inversion recovery sequence and high-resolution T(1) weighted imaging scan. The Wisconsin White Matter Hyperintensities Segmentation Toolbox (W2MHS) was used to automatically mark and extract the volume of the white matter hyperintensity. Results: The average error distances of egocentric virtual (P=0.002) and allocentric virtual (P=0.039) of MCI patients are greater than that of the control group, but the average error distance of mixed (allocentric-egocentric virtual) navigation had no statistic difference between two groups (P=0.070). The volume of the whole white matter hyperintensity, periventricular white matter hyperintensity, and deep white matter hyperintensity showed no significant differences between two groups (all P>0.05). Partial correlation analysis showed that after controlling for age, gender, education level and whole brain volume, the average error distance of mixed (allocentric-egocentric virtual) navigation in MCI patients was positively correlated to the volume of the whole white matter hyperintensity, deep white matter intensity, and periventricular white matter hyperintensity (r=0.469, 0.434, 0.512, all P<0.05). The average error distance of allocentric virtual navigation is positively correlated with the volume of periventricular white matter hyperintensity (r=0.403, P=0.033). There is no correlation between the average error distance of egocentric virtual navigation and the hyperintensity of white matter. Conclusions: The spatial navigation ability of patients with MCI is related to white matter lesions, which is of great significance for further research on the potential biological mechanisms affecting human spatial navigation ability.


Assuntos
Disfunção Cognitiva , Leucoaraiose , Navegação Espacial , Substância Branca , Idoso , Idoso de 80 Anos ou mais , Estudos Transversais , Feminino , Humanos , Imagem por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Testes Neuropsicológicos
13.
Zhonghua Yi Xue Za Zhi ; 100(33): 2622-2627, 2020 Sep 08.
Artigo em Chinês | MEDLINE | ID: mdl-32892610

RESUMO

Objective: To investigate the prevalence and predictors of intraplaque hemorrhage (IPH) in ischemic stroke patients with intracranial atherosclerosis. Methods: Ischemic stroke patients with intracranial atherosclerosis who were consecutively admitted to Beijing Tsinghua Changgung Hospital from January 2017 to April 2018 were retrospectively analyzed. High-resolution magnetic resonance vessel wall imaging was used to assess atherosclerotic plaque characteristics of intracranial artery. Possible variables correlated with IPH were compared between IPH and no-IPH groups, as well as in symptomatic IPH and no symptomatic IPH groups. Logistic regression analysis was used to determine the predictors of all IPH and symptomatic IPH in intracranial artery. Results: A total of 276 ischemic stroke patients with intracranial atherosclerosis were included, of which, 41.3% (114/276) were IPH-postive, and 28.1%(32/114) of them were symptomatic. In multivariate regression analysis, maximum wall thickness was independently associated with the presence of all IPH and symptomatic IPH (OR=2.15, 95%CI: (1.42-3.24) and OR=3.46, 95%CI: (1.94-6.17), respectively). Conclusion: The prevalence of IPH in ischemic stroke patients with intracranial atherosclerosis is much higher than expected. Moreover, atherosclerosis plaque burden is independently associated with IPH, but it is non-specific in identifying symptomatic IPH.


Assuntos
Estenose das Carótidas , Arteriosclerose Intracraniana , Placa Aterosclerótica , Acidente Vascular Cerebral , Humanos , Imagem por Ressonância Magnética , Prevalência , Estudos Retrospectivos
14.
Eur J Paediatr Dent ; 21(3): 219-226, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32893656

RESUMO

AIM: Asymptomatic TMJ arthritis in juvenile idiopathic arthritis (JIA) patients may cause damage and deformity of the joint. The clinical manifestation of early-stage TMJ arthritis is not characteristic. Clinical findings commonly appear in a late stage of TMJ involvement, but they can also be masked by antirheumatic therapy. The absence of clinical symptoms, and the lack or insufficient clinical signs do not provide reliable information about the TMJ involvement. The aim of the study was to conduct a systematic review of the evidence for clinical symptoms and signs of early-stage TMJ arthritis, as well as for correlation between clinical parameters and TMJ abnormalities imaging in JIA patients. METHODS: Study design: A systematic review of papers published from 1998 to 2019 regarding early clinical and imaging findings of TMJ arthritis in JIA patients. RESULTS: The search resulted in 292 studies. Eleven publications were included in the review. CONCLUSION: Clinical signs and symptoms do not allow to detect the early stage of TMJ arthritis in JIA patients. To monitor individual orofacial development, periodic TMJ clinical examination should be a part of an evaluation of JIA children's growth. There is a need to develop clinical management guidelines, as well as diagnosis standards of clinical and imaging TMJ examination for JIA children, considering their developmental age.


Assuntos
Artrite Juvenil , Transtornos da Articulação Temporomandibular , Criança , Diagnóstico Precoce , Humanos , Imagem por Ressonância Magnética , Articulação Temporomandibular
15.
Zhongguo Yi Xue Ke Xue Yuan Xue Bao ; 42(4): 459-467, 2020 Aug 30.
Artigo em Chinês | MEDLINE | ID: mdl-32895097

RESUMO

Objective To evaluate the correlation between the radiomics signature of hepatobiliary phase imaging of gadolinium-ethoxybenzyl diethylenetriaminepentaacetic acid(Gd-EOB-DTPA)enhanced magnetic resonance imaging(MRI)and Child-Pugh of liver cirrhosis,establish nomogram prediction model,and assess the predictive value of quantitative assessment of liver reserve function of patients with liver cirrhosis. Methods One hundred patients with liver cirrhosis who met the inclusion criteria were divided into 52 patients with Child-Pugh grade A and 48 patients with Child-Pugh grade B+C according to Child-Pugh classification criteria,and were randomly divided into training set and test set at a proportion of 7∶3.The AK software was used to extract the imaging features of the Gd-EOB-DTPA-enhanced MRI hepatobiliary images of the patients in the training set,and the least absolute shrinkage and selection operator feature selection algorithm was used to reduce the dimension of the data,select the features,and construct the radiomics tags.According to the radiomics label Rad-score,a line chart(nomogram)prediction model was established to predict the Child-Pugh B+C level of liver reserve function.The model was applied to the training set and test set respectively,and the diagnostic efficiency was quantitatively evaluated by receiver operating characteristic(ROC)curve. Results After dimension reduction and screening of 396 texture feature parameters extracted by AK software,7 image feature parameters were obtained.According to the above characteristics,the radiomics tag Rad-score was constructed and the nomogram prediction model was created.The differences of Rad-score scores between Child-Pugh A and Child-Pugh B+C groups in training set and test set were statistically analyzed by Wilcoxon rank sum test(P=0.000, P=0.001).The diagnostic efficacy of nomogram prediction model for predicting Child-Pugh B+C grade of liver reserve function in the ROC curve of training set and test set was 0.88 and 0.86 respectively. Conclusions The nomogram prediction model created according to the radiomics tag Rad-score of patients with liver cirrhosis with different liver reserve functions can be used as a more accurate and reliable auxiliary detection tool for liver reserve function.It provides a new means for clinicians to evaluate liver reserve function more accurately.


Assuntos
Imagem por Ressonância Magnética , Meios de Contraste , Gadolínio DTPA , Humanos , Cirrose Hepática
16.
Zhongguo Yi Xue Ke Xue Yuan Xue Bao ; 42(4): 566-569, 2020 Aug 30.
Artigo em Chinês | MEDLINE | ID: mdl-32895113

RESUMO

The ganglioneuroma is a benign tumor originating from sympathetic ganglion cells.It often locates in the posterior mediastinum,retroperitoneum,and adrenal medulla.The intraspinal ganglioneuromas is relatively rare in clinical practice,which mainly locates in the cervical and thoracolumbar segments.A patient with main symptom of cough was examined by magnetic resonance imaging before operation in our center.Intraspinal ganglioneuromas was confirmed in the left intervertebral cavity area.Total resection of the tumor via the posterior median approach was performed.HE staining showed the mature ganglion cells were scattered.The patient was followed up for three months and no tumor recurrence occured.


Assuntos
Tosse/etiologia , Ganglioneuroma , Ganglioneuroma/complicações , Humanos , Imagem por Ressonância Magnética , Neurônios , Coloração e Rotulagem
17.
Bone Joint J ; 102-B(9): 1194-1199, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32862691

RESUMO

AIMS: The purpose of this study was to identify the changes in untreated long head of the biceps brachii tendon (LHBT) after a rotator cuff tear and to evaluate the factors related to the changes. METHODS: A cohort of 162 patients who underwent isolated supraspinatus with the preservation of LHBT was enrolled and evaluated. The cross-sectional area (CSA) of the LHBT on MRI was measured in the bicipital groove, and preoperative to postoperative difference was calculated at least 12 months postoperatively. Second, postoperative changes in the LHBT including intratendinous signal change, rupture, dislocation, or superior labral lesions were evaluated with seeking of factors that were correlated with the changes or newly developed lesions after rotator cuff repair. RESULTS: The postoperative CSA (12.5 mm2 (SD 8.3) was significantly larger than preoperative CSA (11.5 mm2 (SD 7.5); p = 0.005). In total, 32 patients (19.8%) showed morphological changes in the untreated LHBT 24 months after rotator cuff repair. Univariate regression analysis revealed that the factor chiefly related to the change in LHBT status was an eccentric LHBT position within the groove found on preoperative MRI (p = 0.011). Multivariate analysis using logistic regression also revealed that an eccentric LHBT position was a factor related to postoperative change in untreated LHBTs (p = 0.011). CONCLUSION: The CSA of the LHBT inside the biceps groove increased after rotator cuff repair. The preoperative presence of an eccentrically positioned LHBT was associated with further changes of the tendon itself after rotator cuff repair. Cite this article: Bone Joint J 2020;102-B(9):1194-1199.


Assuntos
Artroscopia , Imagem por Ressonância Magnética , Lesões do Manguito Rotador/cirurgia , Tendões/anatomia & histologia , Tendões/diagnóstico por imagem , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
18.
Medicine (Baltimore) ; 99(33): e21690, 2020 Aug 14.
Artigo em Inglês | MEDLINE | ID: mdl-32872041

RESUMO

The clinical outcomes of redundant nerve root syndrome (RNRS) in patients with lumbar foraminal spinal stenosis (LFSS) are currently unknown. The purpose of this study was to evaluate the postprocedural outcomes of RNRS in LFSS after percutaneous lumbar foraminoplasty (PLF) and identify the factors associated with RNRS by comparative analysis between patients with and without RNRS.Patients with LFSS who underwent PLF were retrospectively analyzed. RNRS is defined as the presence of thick, elongated, and tortuous structures in the cauda equine associated with lumbar spinal stenosis. Based on the sagittal or transverse magnetic resonance imaging scans obtained before the PLF, the patients were stratified into 2 groups. Comparative analysis was performed between patients with RNRS (group R) and those without RNRS (group C).From March 2016 to January 2019, 8 of the 21 (38.1%) patients undergoing PLF showed signs of RNRS on magnetic resonance imaging images. PLF showed a tendency for less therapeutic effect with respect to changes in pain intensity in group R as compared to group C, but there were no statistically significant differences between the 2 groups. RNRS correlated with the cross-sectional area (CSA) of the dural sac and LFSS grade (P < .05). The CSA of the dural sac was smaller and the grade of LFSS was higher in group R than in group C.RNRS is commonly associated with lumbar spinal stenosis and could affect the treatment outcomes. Clinical outcomes in group R were not statistically different from those in group C, although group R showed slightly worse outcomes. The independent factors associated with RNRS were CSA of the dural sac and the LFSS grade.


Assuntos
Foraminotomia/métodos , Síndromes de Compressão Nervosa/cirurgia , Estenose Espinal/cirurgia , Estudos de Casos e Controles , Humanos , Vértebras Lombares/diagnóstico por imagem , Imagem por Ressonância Magnética , Síndromes de Compressão Nervosa/complicações , Síndromes de Compressão Nervosa/diagnóstico por imagem , Estudos Retrospectivos , Raízes Nervosas Espinhais/diagnóstico por imagem , Estenose Espinal/complicações , Estenose Espinal/diagnóstico por imagem
19.
Rev Med Suisse ; 16(704): 1554-1559, 2020 Sep 02.
Artigo em Francês | MEDLINE | ID: mdl-32880111

RESUMO

Hepatocellular adenomas (HA) are rare benign liver tumors known to affect mainly women of reproductive age taking oral contraception. They can be complicated by hemorrhage or malignant transformation to hepatocellular carcinoma, especially when the size of the lesion exceeds 5 cm. Magnetic resonance imaging is the most specific tool for the non-invasive characterization of HA. The discovery of mutations underlying different specific HA phenotypes has allowed the establishment of a molecular classification that modified the management of this pathology.


Assuntos
Adenoma de Células Hepáticas , Neoplasias Hepáticas , Adenoma de Células Hepáticas/diagnóstico , Adenoma de Células Hepáticas/genética , Adenoma de Células Hepáticas/patologia , Adenoma de Células Hepáticas/terapia , Feminino , Humanos , Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/patologia , Neoplasias Hepáticas/terapia , Imagem por Ressonância Magnética , Mutação
20.
Orv Hetil ; 161(36): 1514-1521, 2020 09.
Artigo em Húngaro | MEDLINE | ID: mdl-32886626

RESUMO

INTRODUCTION: The gold standard method for shoulder surgery imaging is magnetic resonance imaging (MRI). The sensitivity of the conventional MRI for full thickness tears is way above 85%, for partial rotator cuff lesions this number is less than 40%. Diagnostic accuracy is equally low in detecting different variations of anterior labrum lesion and also in injury of the glenohumeral ligaments. Contrast agent given directly into the joint can improve these diagnostic inaccuracies. METHOD: We made the first shoulder joint related MR arthrography in February 2018 at the Semmelweis University. The studied period lasted for 17 months; during that time 29 examinations were performed. For the injection we used gadolinium-based contrast substance. RESULTS: In the case of 26 patients (89.9%), the contrast substance had a good position and distended well. From all of the shoulder MRI examinations, 9 (31%) surgical interventions were made, and 8 surgical findings had the same diagnosis as the radiologic description. CONCLUSION: The contrast substance given into the intraarticular space makes it easier to identify and detect the structures in the joint. The injection under X-ray screening is safe, it is absorbed from the joint in short time, and so far - based on our experience - there has not been any complication. It can help to identify injuries which are difficult to diagnose with conventional MRI, and helps planning before surgery. Orv Hetil. 2020; 161(36): 1514-1521.


Assuntos
Artrografia/métodos , Imagem por Ressonância Magnética/métodos , Articulação do Ombro/diagnóstico por imagem , Humanos , Articulação do Ombro/cirurgia
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