目的 探讨磁共振弥散张量成 像(DTI)在评估脑梗死患者运动功能康 复治疗效果中的应用价值。方法 医院 36例慢性脑梗死患者运动功能康复治疗 前后均行磁共振成像和DTI检查，处理 图像数据获得各向异性分数(FA)伪彩 图，行双侧皮质脊髓束(CST)重建，对 健侧和患侧相关数据进行统计分析。 结果 本组36例患者中，2级15例，占 41.67%；3级21例，占58.33%；将15例2 级作为A组，21例3级作为B组；A组康复 FA值为(0.612±0.039)显著高于B组；2 组康复后均显著下降，与康复前相比， 差异显著(P＜0.05)；A组康复后FA值为 (0.556±0.064)显著高于B组，具有统 计学意义(P＜0.05)；康复前A组FudlMeyer评分为(57.264±5.821)分显著高 于B组，康复后A组Fudl-Meyer评分为 (85.162±9.861)分显著高于B组，差异 显著(P＜0.05)；康复治疗前后CST FA值 下降百分数与Fudl-Meyer评分上升百分 数呈负相关关系。结论 磁共振DTI技术 可根据CST受损程度评估肢体运动康复训 练效果。

Objective To investigate the application value of magnetic resonance diffusion tensor imaging (DTI) in evaluating the effect of motor function rehabilitation in patients with cerebral infarction. Methods Magnetic resonance imaging (MRI) and DTI examination were performed in 36 cases of patients with chronic cerebral infarction in the hospital before and after the motor function rehabilitation. The image data were processed to obtain fractional anisotropy (FA) pseudo color pictures. The bilateral corticospinal tract (CST) reconstruction was performed and the related data of contralateral healthy side and diseased side were statistically analyzed. Results Among the 36 patients, 15 cases were in grade 2, accounting for 41.67% and 21 cases in grade 3, accounting for 58.33%. 15 cases in grade 2 were taken as group A while 21 cases in grade 3 as group B. The rehabilitation FA value in group A was (0.612±0.039) which was significantly higher than that in group B. After recovery, that in the two groups decreased significantly. Compared with that before recovery, the difference was significant (P＜0.05). After recovery, the FA value in group A was (0.556±0.064) which was significantly higher than that in group B, which was statistically significant (P＜0.05). Before recovery, the Fudl-Meyer score in group A were (85.162±9.861) points which were significantly higher than those in group B, and the difference was significant (P＜0.05). The decreasing percentage of CST FA before and after rehabilitation was negatively correlated with increasing percentage of Fudl-Meyer score. Conclusion Magnetic resonance DTI technique can be used to evaluate the effect of limb motor rehabilitation training according to the extent of CST damage.