目的应用动态磁敏感增强MR灌注成像(DSC-PI)技术对Sturge-Weber综合征(SWS)受累白质区的血流灌注进行定量测量,并和各种癫痫状态指标进行相关性分析,以期合理的解释SWS血流动力学与癫痫状态的关系。材料与方法 14例临床确诊为SWS的患儿...目的应用动态磁敏感增强MR灌注成像(DSC-PI)技术对Sturge-Weber综合征(SWS)受累白质区的血流灌注进行定量测量,并和各种癫痫状态指标进行相关性分析,以期合理的解释SWS血流动力学与癫痫状态的关系。材料与方法 14例临床确诊为SWS的患儿进行MRI检查,其中男6例,女8例,平均年龄4.0岁(0.8～10.0岁)。所有患儿的病变部位均为单侧大脑半球。MR扫描序列包括:矢状面及轴面T1WI、轴面FSET2WI、DSC-PI及增强后轴面T1WI。观察所有图像以确认脑内病变位置及范围;利用SPIN(signal process in neuroimage)软件分别测量病变白质区域及相应对侧位置的脑血流量(CBF)、脑血容量(CBV)和平均通过时间(MTT),并计算出灌注比值(CBFr、CBVr及MTTr)。根据CBFr值将患儿分为高灌注组(HP)及低灌注组(LP)。记录每例患儿的临床资料,尤其有无癫痫发作以及反映发作的各项参数:首次癫痫发作年龄、癫痫发作频率(SSF)及癫痫持续时间。对高、低灌注组病变侧与对侧的CBF、CBV及MTT值进行配对秩和检验;对癫痫状态的各临床参数与各项灌注参数进行Spearman相关分析。结果 14例SWS患者中,9例受累白质区CBF及CBV较对侧明显减低(CBFr值为-0.37±0.24,CBVr=-0.22±0.25,P值均<0.01),为LP组;5例脑内病变侧白质区CBF及CBV较对侧显著增高(CBFr值为0.31±0.05,CBVr值为0.40±0.17,P值均<0.01),为HP组。LP组年龄及癫痫发作频率得分(SSF)较HP组有增大趋势(年龄=63.80月,48.83月;SSF=2.50,1.33),但这差异缺乏统计学意义(P值分别为0.36、0.12)。病变侧CBFr值和CBV值与癫痫持续时间呈明显负相关(CBFr:r=-0.58;CBV:r=-0.55,P值均<0.05)。CBFr和CBVr与癫痫发作频率呈负相关,即癫痫发作越频繁,CBFr和CBVr越低(CBFr:r=-0.56;CBVr:r=-0.63,P值均<0.05)。结论 SWS受累白质区域的血流灌注并非持续降低,而存在相对高灌注状态;灌注异常与癫痫发作的频率和癫痫持续时间有关。展开更多
Carpal tunnel syndrome(CTS) is the most commonly diagnosed disabling condition of the upper extremities. It is the most commonly known and prevalent type of peripheral entrapment neuropathy that accounts for about 90%...Carpal tunnel syndrome(CTS) is the most commonly diagnosed disabling condition of the upper extremities. It is the most commonly known and prevalent type of peripheral entrapment neuropathy that accounts for about 90% of all entrapment neuropathies. This review aims to provide an outline of CTS by considering anat-omy, pathophysiology, clinical manifestation, diagnostic modalities and management of this common condition, with an emphasis on the diagnostic imaging evaluation.展开更多
Beckwith-Wiedemann syndrome(BWS) is an overgrowth syndrome associated with increased risk to develop malignancies including adrenocortical carcinoma. Ovarian thecal metaplasia of the adrenal gland is a rare tumorlike ...Beckwith-Wiedemann syndrome(BWS) is an overgrowth syndrome associated with increased risk to develop malignancies including adrenocortical carcinoma. Ovarian thecal metaplasia of the adrenal gland is a rare tumorlike mesenchymal lesion in BWS patients that lacks detailed radiological description. We report a 17-yearold female patient with BWS, associated with bilateral Wilms tumor, hepatic hemangiomatosis, pancreatic neuroendocrine tumor, and a phyllodes tumor of the right breast. Surveillance abdominal ultrasound identified a right adrenal mass that was further characterized by computed tomography and magnetic resonance imaging. Radiologically, this mass displayed features that overlap with adrenocortical carcinoma and pheochromocytoma but after pathological examination this proved to be an ovarian thecal metaplasia of the adrenal gland. Adrenal masses in BWS should raise the suspicion for adrenocortical carcinoma though other adrenal tumors including ovarian thecal metaplasia can be seen in these patients.展开更多
Turner syndrome(TS)is a rare disorder affecting 25–50 in 100000 female newborns.Bicuspid aortic valve(BAV)is assumed to be the most common congenital heart defect(CHD)in TS.In literature,reported BAV prevalence in TS...Turner syndrome(TS)is a rare disorder affecting 25–50 in 100000 female newborns.Bicuspid aortic valve(BAV)is assumed to be the most common congenital heart defect(CHD)in TS.In literature,reported BAV prevalence in TS ranges between 14%and 34%.The specific BAV prevalence in TS is still unknown.The aim of this study was to give a more precise estimation of BAV prevalence in TS by conducting a meta-analysis of TS-studies,which detected BAV by either cardiac magnetic resonance imaging(MRI)or cardiac computed tomography(CT).We searched PubMed,Cochrane Library,and Web of Science databases to collect observational studies including the prevalence of BAV identified by cardiac MRI or cardiac CT in TS patients up to June 4th,2021.After screening for inclusion,data extraction,and quality assessment by two independent reviewers,the meta-analysis was performed with R 4.1.1 software.Results are shown as proportion and weighted mean difference with 95%confidence intervals(95%CI).In total,11 studies involving 1177 patients were included.Pooled data showed that the prevalence of BAV in TS patients was 23.7%(95%CI:21.3%to 26.1%).No high heterogeneity was found between the included studies.The current meta-analysis reveals that BAVcan be detected in 23.7%of TS patients receiving cardiac MRI or cardiac CT.Therefore,BAV can be considered as the most common CHD in TS.Compared to TTE,cardiac MRI and cardiac CT might represent superior imaging modalities in BAV assessment of adult TS patients.展开更多
The introduction of coronavirus disease-2019(COVID-19)as a global pandemic has contributed to overall morbidity and mortality.With a focus on understanding the immunology and pathophysiology of the disease,these featu...The introduction of coronavirus disease-2019(COVID-19)as a global pandemic has contributed to overall morbidity and mortality.With a focus on understanding the immunology and pathophysiology of the disease,these features can be linked with the respective findings of imaging studies.Thus,the constellation between clinical presentation,histological,laboratory,immunological,and imaging results is crucial for the proper management of patients.The purpose of this article is to examine the role of imaging during the particular stages of severe acute respiratory syndrome coronavirus 2 infection–asymptomatic stage,typical and atypical COVID-19 pneumonia,acute respiratory distress syndrome,multiorgan failure,and thrombosis.The use of imaging methods to assess the severity and duration of changes is crucial in patients with COVID-19.Radiography and computed tomography are among the methods that allow accurate characterization of changes.展开更多
文摘目的应用动态磁敏感增强MR灌注成像(DSC-PI)技术对Sturge-Weber综合征(SWS)受累白质区的血流灌注进行定量测量,并和各种癫痫状态指标进行相关性分析,以期合理的解释SWS血流动力学与癫痫状态的关系。材料与方法 14例临床确诊为SWS的患儿进行MRI检查,其中男6例,女8例,平均年龄4.0岁(0.8～10.0岁)。所有患儿的病变部位均为单侧大脑半球。MR扫描序列包括:矢状面及轴面T1WI、轴面FSET2WI、DSC-PI及增强后轴面T1WI。观察所有图像以确认脑内病变位置及范围;利用SPIN(signal process in neuroimage)软件分别测量病变白质区域及相应对侧位置的脑血流量(CBF)、脑血容量(CBV)和平均通过时间(MTT),并计算出灌注比值(CBFr、CBVr及MTTr)。根据CBFr值将患儿分为高灌注组(HP)及低灌注组(LP)。记录每例患儿的临床资料,尤其有无癫痫发作以及反映发作的各项参数:首次癫痫发作年龄、癫痫发作频率(SSF)及癫痫持续时间。对高、低灌注组病变侧与对侧的CBF、CBV及MTT值进行配对秩和检验;对癫痫状态的各临床参数与各项灌注参数进行Spearman相关分析。结果 14例SWS患者中,9例受累白质区CBF及CBV较对侧明显减低(CBFr值为-0.37±0.24,CBVr=-0.22±0.25,P值均<0.01),为LP组;5例脑内病变侧白质区CBF及CBV较对侧显著增高(CBFr值为0.31±0.05,CBVr值为0.40±0.17,P值均<0.01),为HP组。LP组年龄及癫痫发作频率得分(SSF)较HP组有增大趋势(年龄=63.80月,48.83月;SSF=2.50,1.33),但这差异缺乏统计学意义(P值分别为0.36、0.12)。病变侧CBFr值和CBV值与癫痫持续时间呈明显负相关(CBFr:r=-0.58;CBV:r=-0.55,P值均<0.05)。CBFr和CBVr与癫痫发作频率呈负相关,即癫痫发作越频繁,CBFr和CBVr越低(CBFr:r=-0.56;CBVr:r=-0.63,P值均<0.05)。结论 SWS受累白质区域的血流灌注并非持续降低,而存在相对高灌注状态;灌注异常与癫痫发作的频率和癫痫持续时间有关。
文摘Carpal tunnel syndrome(CTS) is the most commonly diagnosed disabling condition of the upper extremities. It is the most commonly known and prevalent type of peripheral entrapment neuropathy that accounts for about 90% of all entrapment neuropathies. This review aims to provide an outline of CTS by considering anat-omy, pathophysiology, clinical manifestation, diagnostic modalities and management of this common condition, with an emphasis on the diagnostic imaging evaluation.
文摘Beckwith-Wiedemann syndrome(BWS) is an overgrowth syndrome associated with increased risk to develop malignancies including adrenocortical carcinoma. Ovarian thecal metaplasia of the adrenal gland is a rare tumorlike mesenchymal lesion in BWS patients that lacks detailed radiological description. We report a 17-yearold female patient with BWS, associated with bilateral Wilms tumor, hepatic hemangiomatosis, pancreatic neuroendocrine tumor, and a phyllodes tumor of the right breast. Surveillance abdominal ultrasound identified a right adrenal mass that was further characterized by computed tomography and magnetic resonance imaging. Radiologically, this mass displayed features that overlap with adrenocortical carcinoma and pheochromocytoma but after pathological examination this proved to be an ovarian thecal metaplasia of the adrenal gland. Adrenal masses in BWS should raise the suspicion for adrenocortical carcinoma though other adrenal tumors including ovarian thecal metaplasia can be seen in these patients.
文摘Turner syndrome(TS)is a rare disorder affecting 25–50 in 100000 female newborns.Bicuspid aortic valve(BAV)is assumed to be the most common congenital heart defect(CHD)in TS.In literature,reported BAV prevalence in TS ranges between 14%and 34%.The specific BAV prevalence in TS is still unknown.The aim of this study was to give a more precise estimation of BAV prevalence in TS by conducting a meta-analysis of TS-studies,which detected BAV by either cardiac magnetic resonance imaging(MRI)or cardiac computed tomography(CT).We searched PubMed,Cochrane Library,and Web of Science databases to collect observational studies including the prevalence of BAV identified by cardiac MRI or cardiac CT in TS patients up to June 4th,2021.After screening for inclusion,data extraction,and quality assessment by two independent reviewers,the meta-analysis was performed with R 4.1.1 software.Results are shown as proportion and weighted mean difference with 95%confidence intervals(95%CI).In total,11 studies involving 1177 patients were included.Pooled data showed that the prevalence of BAV in TS patients was 23.7%(95%CI:21.3%to 26.1%).No high heterogeneity was found between the included studies.The current meta-analysis reveals that BAVcan be detected in 23.7%of TS patients receiving cardiac MRI or cardiac CT.Therefore,BAV can be considered as the most common CHD in TS.Compared to TTE,cardiac MRI and cardiac CT might represent superior imaging modalities in BAV assessment of adult TS patients.
文摘The introduction of coronavirus disease-2019(COVID-19)as a global pandemic has contributed to overall morbidity and mortality.With a focus on understanding the immunology and pathophysiology of the disease,these features can be linked with the respective findings of imaging studies.Thus,the constellation between clinical presentation,histological,laboratory,immunological,and imaging results is crucial for the proper management of patients.The purpose of this article is to examine the role of imaging during the particular stages of severe acute respiratory syndrome coronavirus 2 infection–asymptomatic stage,typical and atypical COVID-19 pneumonia,acute respiratory distress syndrome,multiorgan failure,and thrombosis.The use of imaging methods to assess the severity and duration of changes is crucial in patients with COVID-19.Radiography and computed tomography are among the methods that allow accurate characterization of changes.
