鼻咽癌增强CT扫描癌肿强化时相探讨

Enhanced CT Scan on Nasopharyngeal Carcinoma and Evaluation for Enhancement Occasion

目的:探讨鼻咽癌在CT扫描中的强化规律和选择最佳扫描时机。材料与方法:98例做平扫加增强扫描。在持续观察时,使用单层多次或多层多次扫描技术。计算肿块明显强化的开始时间、持续时间。结果:有85例明显强化。注药后56秒左右开始出现明显强化的有46例,74秒时达到82例,占96%,92秒时85例全部明显强化。明显强化后,持续时间可达250秒以上。其强化时相特点为注药后,癌肿快速强化,强化持续时间较长。结论:选择最佳的扫描时机对癌肿的清晰显示具有重要价值。扫描开始时间应以74秒前后为佳,持续观察时,扫描间隔时间宜长,且不会错过观察时机。

Purpose: To detect the regularity of CT scanning on nasopharyngeal carcinoma and determine the best scanning chance. Materials and Methods: Plain plus enhanced scan on 98 cases, in the continuous observation, mono and multi - layer scanning technology is used. Calculating the accurate time of initiation and lasting time. Results: There was accurate enhancement in 85 cases. The enhancement occurred obviously in 42 cases after injection for about 56 seconds, and that for 83 cases after 74 seconds in 96% . 85 cases were enchanced completely on 92 second. The time for enhancement lasted more than 250 seconds after accurate reinforcement. The charistic of reinforcement was enhanced fastly after injection, and the enhancement lasted a longer time. Conclusion: There is a significant value to determine the best scanning chance for manifesting the mass clearly. The best scanning time is about 74 seconds. On continuing observation, the scanning interval should be a little longer and it will not lose the time of observation.