摘要
目的 研究MR灌注成像 (PWI)在脑星形细胞肿瘤术前分级中的应用价值。方法 对 2 8例脑星形细胞肿瘤病人行MRPWI ,低级别星形细胞瘤 9例 ,间变型星形细胞瘤 12例 ,胶质母细胞瘤 7例。依次行常规MRI及MRPWI ,首先得到信号强度 时间曲线 ,并合成相对脑血流容积 (rCBV)图 ,计算出最大rCBV比率。结果 三组最大rCBV比率分别为 (3 .2 3± 0 .97) ,(5 .2 3± 0 .3 3 ) ,(6.0 9± 0 .70 ) ,三组之间比较均有显著性差异。结论 MRPWI能有效地在术前评价星形细胞肿瘤的病理级别。
Objective To study the value of the MR perfusion-weighted imaging (PWI) in preoperative assessment of histological grade of astrocytoma. Methods Twenty-eight patients with astrocytomas underwent contrast material-enhanced MR PWI. All cases were divided into three groups. The final diagnoses were 9 low-grade astrocytomas, 12 anaplastic astrocytomas and 7 glioblastomas. The signal over time curve were described and relative cerebral blood volume (rCBV) maps were produced.Then,the maximal rCBV ratios were calculated. Results The maximal rCBV ratios were (3.23±0.97) in low grade astrocytomas, (5.23±0.33) in anaplastic astrocytomas, (6.09±0.70) in glioblastomas.The differences in rCBV ratio between low grade astrocytomas, anaplastic astrocytomas and glioblastomas were significant. Conclusion MR PWI is very useful in preoperative assessing astrocytomas of histological grades.
出处
《中国医学影像技术》
CSCD
2004年第3期381-383,共3页
Chinese Journal of Medical Imaging Technology
关键词
星形细胞肿瘤
磁共振成像
灌注
病理
Astrocytoma
Magnetic resonance imaging
Perfusion
Pathology
