治疗前男性精神分裂症内囊前肢的DTI研究

目的：应用磁共振扩散张量成像（DTI）探讨男性精神分裂症患者治疗前两侧内囊前肢神经纤维束的微观结构改变。方法：对13例治疗前（病程〈5年）的男性精神分裂症患者（病例组）和11例年龄相匹配的男性健康志愿者（对照组）行DTI检查,在12个方向施加扩散梯度磁场,采用小兴趣区（ROI）法测量并比较两组受试者内囊前肢各向异性分数（FA）值和表观扩散系数（ADC）值的差异。结果：病例组左、右侧内囊前肢的FA值分别为0.587±0.034和0.620±0.042,ADC值分别为（7.349±0.414）和（7.359±0.340）×10-4mm2/s,对照组左、右侧内囊前肢的FA值分别为0.627±0.032和0.639±0.045,ADC值分别为（7.186±0.302）和（7.243±0.389）×10-4mm2/s。病例组左侧内囊前肢FA值低于对照组,差异有显著性意义（t=2.297,P〈0.05）,两组右侧内囊前肢FA值和双侧内囊前肢ADC值的差异均无显著性意义（P〉0.05）。结论：治疗前男性精神分裂症患者白质微观结构发生改变,提示左侧丘脑与前额叶、扣带回前部相互联系的白质功能障碍,可以解释男性精神分裂症的一些临床症状和认知缺陷。

Diffusion Tensor Imaging of the Anterior Limb of Internal Capsule in Male Schizophrenic Patients before Neuroleptic Therapy

Objective:To evaluate the micro-structural changes of fibrous tract in anterior limb of bilateral internal capsules in male schizophrenic patients before neuroleptic therapy with diffusion tensor imaging (DTI).Methods:13 male schizophrenic patients (with the course <5 years) before neuroleptic therapy and 11 age-matched male healthy controls were studied with DTI in 12 different directions and small region of interest (ROI) were used.Fractional anisotropy (FA) and average diffusion coefficient (ADC) of the ...