实时功能磁共振成像技术对运动皮层的定位探讨

目的：探讨运动皮层实时脑功能的成像技术和Functool,ICA和SPM的后处理技术。方法：15例正常志愿者进行23次对指运动实时脑功能扫描,经Functool,IAC和SPM软件后处理成像,并对3种软件的成像进行分析。结果：Functool处理后,23次实时脑功能成像显示了手指运动对侧初级皮层运动区/感觉区（M1/S1）、辅助运动区（SMA）明显激活,同侧激活区较小或者未见激活区。双侧小脑皮质有明显激活,同侧较大。5次运动前区双侧有激活,4次对侧有较小激活区。12次ICA,SPM所获图像与相应的Functool图像一致。结论：实时脑功能成像能对全脑进行实时扫描,Functool,ICA和SPM后处理能够较好地显示相应的脑运动皮层激活区。

Motor cortex by real-time imaging process functional MRI during finger movements

OBJECTIVE: To explore the techniques of RTIP-fMRI scanning and the correspondence between structure and functional changes of motor cortex during self-paced finger movements by RTIP-fMRI in normal volunteers. METHODS: The 15 healthy volunteers were studied by RTIP-fMRI, and the activation tasks consisted of self-paced finger movements performed with the right and the left hands. Image postprocessing was done on the workstation by "correlation coefficient" algorithm analysis method, IAC and SPM software. RESULTS: There was a good correspondence between the anatomical landmarks of the somatotopical organization of primary motor areas in the 15 volunteers; during the finger tasks, the functional changes occurred in the contralateral primary motor-somatosensory cortex (M1/S1), the supplementary motor area (SMA), and the ipsilateral primary motor cortex. CONCLUSION: RTIP, a promising new technique, can localize the motor cortex accurately. It is superior to any other fMRI techniques, and may be used widely in the function research of the brain.