摘要
目的：探讨鼻咽癌放疗后局部复发和纤维变的 ＣＴ动态增强特征。材料与方法：放疗后纤维发组（ＲＦ组）８６例，男５４例，女３２例。年龄２１－６２岁。放疗后复发组（ＲＮＰＣ组）５２例，男３７例，女１５例．年龄２７岁－６８岁。先行鼻咽部平扫，然后选择“兴趣区”行同层动态增强扫描。采用ＥＬＳＣＩＮＴ ＣＴ－ＦＬＡＳＨ双螺旋ＣＴ扫描机，自动压力注射器注药。分别测量平扫与增强后不同时刻的ＣＴ值，进行统计学处理并描绘密度．时间曲线。结果：（１）ＲＦ组动态增强曲线呈“缓－升－缓降”型。（２）ＲＮＰＣ组动态增强曲线呈“速升－缓升－缓降”型。（３）注射造影剂后４０－３００ｓ期间，ＲＦ组与ＲＮＰＣ组间各对应时刻点ＣＴ值均数均有显著性差异，ＲＮＰＣ组明显高于ＲＦ组。结论：ＲＦ与ＲＮＰＣ的ＣＴ动态增强曲线及病变区ＣＴ值的明显差异可作为两者鉴别诊断的新依据。
Purpose: To evaluate the characteristics of the dynamic enhanced Density-Time curves of recurrent nasopharyngeal carcinoma (RNPC) and the radiofibrosis (RF) on the spiral CT. Materials and methods: 86 cases of RF and 52 cases of RNPC were examined with spiral CT. The CT values of the regions of interest (ROI) at various acquisitions of time (0s, 20s, 30s, 40s, 50s, 60s, 90s, 120s, 150s, 180s, 210s, 240s, 270s, and 300s after the beginning of the contrast injection) were collected. The CT data were analysed statisticaly and the dynamic enhanced density-time curves were established. Results: (1) The typical curve of the RF group was a slowly ascending-slowly descending one. Postcontrast peak of CT values were seen at 210 sec and measured 60.1±2. 57Hu. (2) The typical curve of the RNPC was one of rapidly ascending-slowly ascending-slowly descending; its peak of CT values were seen at 150see and measured 75.4±7.2Hu. (3) The differences of CT values were significant between the RNPC and RF from 40s to 300s postcontrastly (p<0.001). Conclusions: The characteristics of the dynamic enhanced desity-time curves of RF and RNPC may be as the important informations for differential diagnosis.
出处
《中国医学影像学杂志》
CSCD
2000年第1期25-26,47,共3页
Chinese Journal of Medical Imaging
关键词
鼻咽癌
放射治疗
纤维变
CT
鉴别诊断
NPC
radiotherapy
neoplasm recurrence
fibrosis
X-ray computed
differential diagnosis
