摘要
目的：探讨鼻咽癌动态增强的ＣＴ 特征，材料和方法：８２ 例经病理证实的原发鼻咽癌， 鼻咽部平扫后对兴趣区行同层动态增强扫描。采用ＥＬＳＣＩＮＴ ＣＴ－ Ｔｗｉｎ 双螺旋扫描机，用自动压力注射器注药。分别测量平扫和增强后不同时刻的ＣＴ 值， 统计学处理并描绘其动态增强的时间－ 密度曲线。结果：１．ＮＰＣ 平扫时的ＣＴ 值均数为４２ ．８３ ±４ ．６３ Ｈｕ ，增强后ＣＴ 值呈动态变化，至６０ 秒时达峰值，均数为７９ ．６９ ±９ ．９６Ｈｕ 。２． 平扫与增强后２０ －３００ 秒内各组ＣＴ 值均数比较有显著性差异。３． 鼻咽癌增强后３０ － ３００ 秒内各时刻组间的ＣＴ 值均数比较无显著性差异。结论：鼻咽癌的动态增强ＣＴ 特征曲线为速升缓降型，注射造影剂后６０ 秒左右病变强化最明显。
Purpose:To evaluate the characteristics of the enhanced Density-Time curve of NPC(Nasopharyngeal Carcinoma)by dynamic spiral CT.Materials and Methods:82 cases of primary NPC comfirmed pathologically were examined by spiral CT-Twin.The CT numbers of the regions of interest(ROI) at various acquisition times(0s,20s,30s,40s,50s,60s,90s,120s,180s,210s,240s,270s,300s after the beginning of contrast injection)were collected.The CT number differences of various acquisition times were analysed statistically.The Dynamic CT Density-Time curve was established.Results:1.There were significant differences of CT numbers between the contrast scans and the plain scans.2.The difference of the CT numbers of contrast scans taken from 30s to 300s postcontrastly were not significant for each other. Conclusion:The typical curve of NPC is a rapidly ascending-slowly descending one.The peak CT value is around 60sec postcontrastly at 79.69±9.96Hu.
出处
《中国医学计算机成像杂志》
CSCD
1999年第3期163-165,共3页
Chinese Computed Medical Imaging
关键词
鼻咽癌
螺旋CT
诊断
NPC Spiral CT Dynamic Enhancement
