中文说明：脑瘤分割由分离正常脑组织中的不同肿瘤组织（固体或活性肿瘤，水肿，和坏死）的：灰质（GM），白质（WM）和脑脊髓液（CSF）。在脑肿瘤研究中，异常组织的存在可以容易地检测到的大部分时间。然而，准确，重复性分割和异常特征并不简单。
English Description：
Brain tumor segmentation consists of separating the different tumor tissues (solid or active tumor, edema, and necrosis) from normal brain tissues: gray matter (GM), white matter (WM), and cerebrospinal fluid (CSF). In brain tumor studies, the existence of abnormal tissues may be easily detectable most of the time. However, accurate and reproducible segmentation and characterization of abnormalities are not straightforward.