脑扫描临床应用于颅腑占位性病变的诊断近年来日益广泛。它的诊断原理是根据颅内占位性病变能使正常血脑屏障功能损伤或消失而致在扫描图上能出现病灶部位放射性浓集现象。随着近代科学技术的进步,近十年来,在新的低能量短半衰期同位素药剂发展的同时,新的检查放射性仪器也有很大进展,以及扫描方法的不断改进,使脑扫描对脑肿瘤的阳性准确率大为提高。一般报告为75～84%,小脑幕上特别是 The clinical application of brain scanning in the diagnosis of space-occupying lesions in the brain has become increasingly widespread in recent years. Its diagnostic principle is based on intracranial space-occupying lesions can make the normal blood-brain barrier function damage or disappear caused in the scan can appear on the focal site radioactive concentration phenomenon. With the progress of modern science and technology, new radioactive instruments have been greatly improved in the recent ten years due to the development of new isotopes with low energy and short half-lives. As a result of the continuous improvement of scanning methods, The accuracy is greatly improved. The general report is 75 ~ 84%, especially in the tentorium