Objective To probe the minimum dose for trial diagnostic radiation of suspected intracranial germinoma.Methods From May 2003 to Dec 2004,49 patients with suspected intracranial germinoma were enrolled in this study.Thirty patients had solitary lesion and 19 patients had two or more lesions(14 patients had 2 lesions,4 patients had 3 lesions,one patient had 4 lesions with ventricle diffusion),with a total of 74 lesions.The tumor size was measured in three dimensions of MRI/CT before,and after radiation.The do...