大脑镰密度对CT诊断纵裂池出血的影响  

The Effect of Density of Cerebral Falx to CT Diagnosing in Interhemispheric Fissure Hemorrhage

作　　者：程鸣 

机构地区：[1]上海市奉贤区中心医院CT室,201400

出　　处：《中国医学影像学杂志》2006年第3期193-195,共3页Chinese Journal of Medical Imaging

摘　　要：目的：探讨正常大脑镰各段密度的差异及大脑镰密度对CT诊断纵裂池出血的影响.材料和方法：与颞肌密度对比，目测100例正常大脑镰和50例纵裂池出血的密度，并测量其各段CT值.结果：目测93%正常大脑镰密度＜颞肌密度，其中88%胼前段大脑镰密度＜胼后段，100%胼上段大脑镰中部密度＜前、后部;纵裂池出血时82%出血处大脑镰密度＞颞肌密度，18%二者相仿，大脑镰各段的密度改变视纵裂池出血部位和量而异;正常/纵裂池出血时大脑镰各段的平均CT值分别为：胼前段40～54Hu，胼后段45～58 Hu，胼上段前部42～55 Hu，中部36～52 Hu，后部47～65 Hu，颞肌52～53 Hu.46例（92%）出血处密度均＞颞肌.结论：正常大脑镰各段密度有一定差异，熟悉其特点有利于CT诊断纵裂池出血.Purpose： To study the difference of density of segments of the cerebral falx and its effect to CT diagnosis in interhemispheric fissure hemorrhage （IFH）. Materials and Methods： To estimate visually the density of 100 cases with normal cerebral falx and 50 cases of that with IFH, and to measure CT value of each segment respectively, comparing them with the density of temporal muscle. Results： In visual estimation, the density of 93% normal cerebral falxes was lower than that of the temporal muscle, and among normal cases, the density of 88% precallosal segments of falx was lower than that of retrocallosal segments, the density of 100% middle part of superacallosal segments of falx was lower than that of the posterior and anterior part. While the density of 82% of falx with IFH was higher than that of temporal muscle, of 18% both were similar. The density of each segment of the cerebral falx depended on the position and quantity of the blood. Mean value of CT of each segment of cerebral falx which was in normal or IFH was 40 ～ 54Hu at precallosal segment, 45/58Hu at retrocallosal segment, 42 ～ 45Hu at the anterior part of the superacallosal segment, 36 ～ 52Hu at the middle part of that, 47 ～ 65 Hu at posterior part of that. The density of 46（92% ） cases of falx in bleeding areas was higher than that of temporal muscle. Conclusion： It is a feature that the density of each segment of normal cerebral falx has some difference. Acquaintance with this feature may avail to CT diagnosis of IFH.

关 键 词：大脑镰 纵裂池 出血 密度 CT 纵裂池出血 

分 类 号：R816.1[医药卫生—放射医学] R743.34[医药卫生—临床医学]