RESUMO
Objective To investigate the applied value of diffusion tensor tractography(DTT) and visual evoked potential(VEP) for monitoring lumpectomy of lesion adjacent to the optic radiation.Methods Six patients with intracranial lesions adjacent to the optic radiation performed MRI DTT before operation in order to know relationship between the optic radiation and lesion.Neuronavigation was performed and VEP was recorded continuously during the operation.Results Pathological results of specimens showed that 2 cases were astrocytoma(WHOⅡ),1 case was oligodendroglioma(WHOⅡ),1 case was oligodendro-astrocytoma(WHOⅡ),1 case was anaplastic astrocytoma(WHOⅢ～Ⅳ),1 case was cavernous angioma.No patients were found visual deficit and VEP of 6 cases were normal postoperatively.Conclusions Combination neuronavigation with optic radiation DTT preoperatively and neuronavigation with real-time VEP intraoperatively are reliable to monitor the visual function and is helpful to perform neurosurgical planning near the visual pathway to avoid vision postoperative dysfunction.