The Value of Selecting Appropriate Delay Time in Computed Tomography Urography Based on the Type of Delayed Imaging_West China Medical Journal

Authors：

 WANGJian-qiu ¹ , QIXin ¹ , NingYan ²

1. Department of Radiology, the First People's Hospital of Yibin City, Yibin, Sichuan 644000, P. R. China;
2. Department of General Internal Medicine, the First People's Hospital of Yibin City, Yibin, Sichuan 644000, P. R. China;

Corresponding author：

Keywords：

Computed tomography urography; Multi-slice computed tomography; Delayed imaging development

DOI：

10.7507/1002-0179.20150479

Video：

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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. Method 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), levelⅠ (light development), levelⅡ (partial development) and levelⅢ (full development). LevelⅢ was not included in this study. For level 0 to levelⅡ, we delayed scan for 15 to 1 440 minutes. Results As the imaging development degree decreased, the delay time obviously extended. LevelⅡ could be fully displayed after 15 to 150 minutes of delayed scan. LevelⅠ 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. Conclusions 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.

Citation： WANGJian-qiu, QIXin, NingYan. The Value of Selecting Appropriate Delay Time in Computed Tomography Urography Based on the Type of Delayed Imaging. West China Medical Journal, 2015, 30(9): 1683-1686. doi: 10.7507/1002-0179.20150479 Copy

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8.	赵子凤, 柳澄, 赵宁, 等. Flash双源CT在小儿低剂量CT尿路成像中的应用[J]. 医学影像学杂志, 2014, 24(3):451-455.
9.	崔国强, 刘铁钢, 邓昉, 等. 64排螺旋CT尿路成像质量与肾脏功能的相关性研究[J]. 实用医学影像杂志, 2013, 14(5):325-326.
10.	Kekelidze M, Dwarkasing RS, Dijkshoorn ML, et al. Kidney and urinary tract imaging:triple-bolus multidetector CT urography as a one-stop shop——protocol design, opacification, and image quality analysis[J]. Radiology, 2010, 255(2):508-516.
11.	陈善锡, 高源统, 严志汉, 等. 探讨泌尿系影像学检查对双肾盂输尿管畸形与并发症的诊断差异性研究[J]. 中国临床医学影像杂志, 2015, 26(1):59-61.
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13.	杨培红, 王健. 16排螺旋CT三维重建技术在泌尿系的应用[J]. 中国CT和MRI杂志, 2010, 8(5):69-71.
14.	Stacul F, Rossi A, Cova MA. CT urography:the end of IVU?[J]. Radiol Med, 2008, 113(5):658-669.
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1. Townsend BA, Silverman SG, Mortele KJ, et al. Current use of computed tomographic urography:survey of the society of uroradiology[J]. J Comput Assist Tomogr, 2009, 33(1):96-100.
2. 李亭, 郭春梅, 王成龙, 等. 螺旋CT尿路成像在上尿路梗阻性病变的运用及诊断价值[J]. 华西医学, 2011, 26(5):702-706.
3. 高永华, 闫晓燕, 杨喜银, 等. 128层螺旋CT尿路造影对上尿路梗阻性疾病的诊断价值[J]. 医学影像学杂志, 2012, 22(5):859-860.
4. 杨晓霞, 唐光健, 南喜文, 等. CT尿路成像分泌期图像诊断泌尿系统病变的价值[J]. 中华放射学杂志, 2015, 49(2):117-120.
5. 孙昊, 薛华丹, 刘炜, 等. 单次团注对比剂双源双能量CT泌尿系成像在泌尿系显影及无痛性血尿诊断中的应用价值[J]. 中国医学科学院学报, 2014, 36(3):283-290.
6. 朱玉春, 邢伟, 王建良. 基于不同扫描方案下的CTU应用进展[J]. 中国中西医结合影像学杂志, 2014, 12(3):324-327.
7. 卢向彬, 周鑫, 史浩. CTA、CTU联合应用在泌尿系统疾病中的应用价值研究[J]. 医学影像学杂志, 2013, 23(7):1089-1091, 1110.
8. 赵子凤, 柳澄, 赵宁, 等. Flash双源CT在小儿低剂量CT尿路成像中的应用[J]. 医学影像学杂志, 2014, 24(3):451-455.
9. 崔国强, 刘铁钢, 邓昉, 等. 64排螺旋CT尿路成像质量与肾脏功能的相关性研究[J]. 实用医学影像杂志, 2013, 14(5):325-326.
10. Kekelidze M, Dwarkasing RS, Dijkshoorn ML, et al. Kidney and urinary tract imaging:triple-bolus multidetector CT urography as a one-stop shop——protocol design, opacification, and image quality analysis[J]. Radiology, 2010, 255(2):508-516.
11. 陈善锡, 高源统, 严志汉, 等. 探讨泌尿系影像学检查对双肾盂输尿管畸形与并发症的诊断差异性研究[J]. 中国临床医学影像杂志, 2015, 26(1):59-61.
12. 孙建男, 高丽媛, 刘影, 等. 64排螺旋CT尿路成像的临床应用价值探讨[J]. 中国临床医学影像杂志, 2008, 19(9):620-622, 637.
13. 杨培红, 王健. 16排螺旋CT三维重建技术在泌尿系的应用[J]. 中国CT和MRI杂志, 2010, 8(5):69-71.
14. Stacul F, Rossi A, Cova MA. CT urography:the end of IVU?[J]. Radiol Med, 2008, 113(5):658-669.
15. Dahlman P, Van Der Molen AJ, Magnusson M, et al. How much dose can be saved in three-phase CT urography? A combination of normal-dose corticomedullary phase with low-dose unenhanced and excretory phases[J]. AJR Am J Roentgenol, 2012, 199(4):852-860.
16. Juri H, Matsuki M, Itou Y, et al. Initial experience with adaptive iterative dose reduction 3D to reduce radiation dose in computed tomographic urography[J]. J Comput Assist Tomogr, 2013, 37(1):52-57.

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West China Medical Journal

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

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