Pre-and postsurgical location and evaluation of the motor hand area with functional MR imaging in patients with intracranial lesions involving motor cortex / 中华放射学杂志

ABSTRACT

Objective To examine the intracranial lesions before and after operation by functional MRI with BOLD technique, and to map the brain activation images of the patients on general MR images. Methods Thirty one patients had lesions involving the frontal and/or parietal lobes in one side of the cerebral hemispheres, and the lesions included 29 tumors (11 gliomas; 13 metastases; 5 meningiomas) and 2 infections. MSEPI technique was performed with four scan planar parallel AC PC. During each scan series, the patients were asked to perform repetitive finger thumb opposition movement in the same period of active and rest duration. All the scanning data were transferred to a workstation and dealt with statistical method. The patients had been examined again by the same sequence protocol postoperatively, and the fMRI images were analyzed and compared with that of the preoperation fMRI. Results The motor cortex of both cerebral hemisphere was asymmetrical, and the border between the motor cortex and lesions could be clearly identified in all of the patients preoperatively. After operation, both sites of the motor cortex were nearly replaced. Conclusion fMRI was very useful in evaluating the surgical planning and the prognosis of the patients.