单光子发射型CT检测抑郁症患者局部脑血流的变化

背景:抑郁症患者存在着不同程度的脑血流灌注减低区,但范围不尽相同,涉及不同的大脑皮质及皮质下结构区域。目的:观察抑郁症患者局部大脑皮质血流灌注异常类型。设计:以诊断为依据的病例-对照分析。单位:上海交通大学医学院附属瑞金医院核医学科,上海交通大学医学院生物医学工程教研室,上海市普陀区精神卫生中心。对象:于1999-01/2000-12选择在普陀区精神卫生中心门诊就诊未治疗的经CCMD-2-R诊断为抑郁症12例患者为观察对象。正常对照者为与之年龄匹配的医院内工作人员19名。方法:采用SPECT检查抑郁症患者和健康人,进行双半胱乙酯脑显像,使用统计参数图对图像进行分析。首先将所有的SPECT图像转换成DICOM格式或anlysis7格式,以Talairach图谱为模版对图像进行标准化及平滑,用高斯随机理论进行统计分析与推断以评价有显著差异的区域。主要观察指标:抑郁症组与正常对照组大脑特定区域血流灌注的区别和平均局部脑血流图像的变化。结果:抑郁症者12例和正常健康人19名均完成检测,进入结果分析。统计参数图分析显示抑郁症患者的双侧额叶、左侧颞上回、左侧边缘叶钩回(Brodmannarea20)、左侧丘脑乳头体、右侧扣带回、右侧壳核血流灌注下降。抑郁症患者的右侧中间额回,右侧上颞回,右侧枕叶,左侧中间额回血流灌注升高。结论:抑郁症患者额叶、颞叶及边缘系统局部脑血流发生了明显的变化。

Changes of regional cerebral blood flow in patients with depressive disorder detected by single photon emission computerized tomography

BACKGROUND: Decrease of regional cerebral blood flow (rCBF) perfusion of different degree exists in depressive patients, but the decreased ranges were different, different cerebral cortical and subcortical regions are involved.OBJECTIVE: To observe the types of abnormal rCBF perfusion in patients with depressive disorder.DESIGN: A diagnosis-based case-control analysis.SETTINGS: Department of Nuclear Medicine, Ruijin Hospital Affiliated to the Medical College of Shanghai Jiaotong University; Staff Room of Biomedical Engineering, Medical College of Shanghai Jiaotong University;Putuo District Mental Health of Shanghai City.PARTICIPANTS: The patients with depressive disorder were selected from the Putuo District Mental Health Center from January 1999 to December 2000, and 19 normal subjects matched by age were selected from the medical staff of the hospital as normal controls.METHODS: The patients with depressive disorder and healthy subjects were examined by single photon emission computerized tomography (SPECT), ethyl cysteinate dimmer (99Tcm-ECD) was performed, and the images were analyzed with the statistical parametric mapping (SPM). All the SPECT images were converted into DICOM format or ANALYZE-7 format at first, and then the images were standardized by taking MRI template as the template and smoothed, and the significantly different regions were evaluated by the statistical analysis and inferences with the Gaussian random theory.MAIN OUTCOME MEASURES: The differences of the cerebral blood flow perfusion in specific region and the changes of average rCBF images were mainly observed in the depressive disorder group and normal control group.RESULTS: All the 12 patients with depressive disorder and 19 normal healthy subjects entered the analysis of results. The SPM showed that the blood flow perfusion was decreased in bilateral frontal lobes, left superior temporal gyrus, left Brodmann area 20, left mamillary body of thalamus,right cingulated gyrus and right putamen in the patients with depressive disorder. The blood flow perfusion was increased in the right central frontal gyrus, right superior temporal gyrus, right occipital lobe and left central frontal gyrus.CONCLUSION: The rCBF is obviously changed in the frontal lobe, temporal lobe and limbic system of patients with depressive disorder.