根据延迟显影类型合理选择CT尿路成像延迟时间的应用价值  

The Value of Selecting Appropriate Delay Time in Computed Tomography Urography Based on the Type of Delayed Imaging

作　　者：王建秋[1] 齐鑫[1] 宁燕[2] 

机构地区：[1]宜宾市第一人民医院放射影像科,四川宜宾644000 [2]宜宾市第一人民医院综合内科,四川宜宾644000

出　　处：《华西医学》2015年第9期1683-1686,共4页West China Medical Journal

摘　　要：目的 分析 CT 尿路成像（CTU）检查中不同延迟显影类型与延迟时间的关系，探讨合理选择 CTU延迟时间的应用价值，以期得到最佳的延迟显影图像。方法 收集 2010 年 1 月－ 2014 年 5 月进行多层螺旋 CTU检查，共纳入 8 min 不能完全显影患者 62 例，其中单侧延迟显影 35 例，双侧延迟显影 27 例，共计 89 例次。根据初次延迟 8 min 后患者双侧尿路显影程度划分为 4 级，分别为 0 级：不显影，Ⅰ级：显影浅淡，Ⅱ级：部分显影，Ⅲ级：完全显影，Ⅲ级不纳入本次研究范围，对 0 ～Ⅱ级进行 15 ～ 1 440 min 延迟扫描。结果 ①随着显影级数递减延迟时间明显延长；②Ⅱ级延迟 15 ～ 150 min 内可以显影；Ⅰ级延迟 150 ～ 720 min 可以显影；③ 0 级显影延迟 120min 后未显影，不需再延迟。结论 根据不同延迟显影级数选择最佳延迟时间，可以避免盲目多次延迟扫描，而且可以获得最佳显影图像、判断肾脏排泄功能的高低，进而更准确诊断泌尿系统相关疾病。Objective To analyze the relationship between image development types and delay time in computed tomography urography （CTU） examination and to investigate the value of choosing reasonable delay time to get the best images. Methods We collected the data of 62 patients who underwent multi-slice CTU examination without fully developed images within 8 minutes from January 2010 to May 2014. There were 35 unilateral and 27 bilateral delayed imaging patients with a total of 89 cases. According to the degree of imaging development after the delayed 8 minutes, we divided it into 4 levels as follows： level 0 （no development）, level Ⅰ （light development）, level Ⅱ （partial development） and level Ⅲ （full development）. Level Ⅲ was not included in this study. For level 0 to level Ⅱ , we delayed scan for 15 to 1 440 minutes. Results As the imaging development degree decreased, the delay time obviously extended. Level Ⅱ could be fully displayed after 15 to 150 minutes of delayed scan. Level Ⅰ could be fully displayed after 150 to 720 minutes. Level 0 still had no imaging development after 120 minutes, so there was no need to continue scanning. Conclusion Selecting appropriate delay time of CTU based on the type of delayed imaging development can avoid unnecessary repeated delay scans, get the best development images, and estimate the kidney secretion functions, which is most helpful for accurate diagnosis of urinary system related diseases.

关 键 词：CT 尿路成像 多层螺旋 CT 延迟显影 

分 类 号：R816.7[医药卫生—放射医学]