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本文研究了37例脑瘤CT片上所示水肿剖面和水肿的不同原因.其中8例多形性胶质母细胞瘤,13例转移瘤、8例脑膜瘤、7例星形细胞瘤(II～Ⅲ级),2例为脑脓肿.按肿瘤周围脑水肿半径分为0～20mm、21～40mm和>40mm三组.均行普通及增强CT扫描.按两个方向测量:(1)从肿瘤边缘向白质的半卵圆中心,(2)从肿瘤边缘向脑室.测量两半球对应部位的CT值,取其差代表移入水肿区水分的近似值.根据以往文献,水肿局部CT值和局部组织水含量有显著的线性关系.因此可借水肿区CT值的降低行人体脑水肿量的测量.研究发现:水肿长度<20mm多为环形水肿;20mm以上则多为不规则形且常有指状突起.瘤周区水含量和水肿长度有关.两者的关系在半对数坐
This paper studied the different causes of edema profile and edema on CT images of 37 brain tumors. Among them, 8 cases of glioblastoma multiforme, 13 cases of metastases, 8 cases of meningiomas, and 7 cases of astrocytomas (II~ Grade III), 2 cases of brain abscess. According to the cerebral edema radius around the tumor is divided into 0 ~ 20mm, 21 ~ 40mm and> 40mm three groups. All normal and enhanced CT scan. Measurement in two directions: (1) from the tumor Half-oval center with marginal white matter, (2) from tumor margin to ventricle. Measure the CT values of the corresponding parts of the hemispheres, and use the difference to represent the approximate value of the water transferred into the edema area. According to previous literature, local CT values of edema and local tissue water The content has a significant linear relationship. Therefore, the amount of brain edema can be measured by decreasing the CT value of the edema region. The study found that: edema length <20mm mostly annular edema; more than 20mm is irregular and often refers to the protrusion The water content in the peritumoral area is related to the edema length. The relationship between the two is in semi-logarithmic