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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。
Objective: To investigate the CT features, materials and methods of dynamic enhancement of nasopharyngeal carcinoma: 82 cases of primary nasopharyngeal carcinoma confirmed by pathology. Using the ELSCINT CT-Twin double helix scanner, inject the drug with an automatic pressure syringe. The CT values at different time after plain scan and post-scan were measured, and the time-density curve with dynamic enhancement was statistically processed. Results: 1. NPC mean CT value of 42 when scanning. 83 ± 4. 63 Hu, enhanced CT value showed a dynamic change to 60 seconds when the peak, averaging 79. 69 ± 9. 96Hu. 2. The mean CT values of all groups within 20-300 seconds after plain scan and enhancement were significantly different. 3. There was no significant difference in mean CT values between groups at all time points within 30 - 300 seconds after nasopharyngeal carcinoma enhancement. CONCLUSIONS: The characteristic curve of dynamic contrast-enhanced CT in nasopharyngeal carcinoma is ascending-descending type. The most obvious lesion enhancement is about 60 seconds after injecting contrast agent.