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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9.	崔國強, 劉鐵鋼, 鄧昉, 等. 64排螺旋CT尿路成像質量與腎臟功能的相關性研究[J]. 實用醫學影像雜志, 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.	陳善錫, 高源統, 嚴志漢, 等. 探討泌尿系影像學檢查對雙腎盂輸尿管畸形與并發癥的診斷差異性研究[J]. 中國臨床醫學影像雜志, 2015, 26(1):59-61.
12.	孫建男, 高麗媛, 劉影, 等. 64排螺旋CT尿路成像的臨床應用價值探討[J]. 中國臨床醫學影像雜志, 2008, 19(9):620-622, 637.
13.	楊培紅, 王健. 16排螺旋CT三維重建技術在泌尿系的應用[J]. 中國CT和MRI雜志, 2010, 8(5):69-71.
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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.
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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, 王成龍, 等. 螺旋CT尿路成像在上尿路梗阻性病變的運用及診斷價值[J]. 華西醫學, 2011, 26(5):702-706.
3. 高永華, 閆曉燕, 楊喜銀, 等. 128層螺旋CT尿路造影對上尿路梗阻性疾病的診斷價值[J]. 醫學影像學雜志, 2012, 22(5):859-860.
4. 楊曉霞, 唐光健, 南喜文, 等. CT尿路成像分泌期圖像診斷泌尿系統病變的價值[J]. 中華放射學雜志, 2015, 49(2):117-120.
5. 孫昊, 薛華丹, 劉煒, 等. 單次團注對比劑雙源雙能量CT泌尿系成像在泌尿系顯影及無痛性血尿診斷中的應用價值[J]. 中國醫學科學院學報, 2014, 36(3):283-290.
6. 朱玉春, 邢偉, 王建良. 基于不同掃描方案下的CTU應用進展[J]. 中國中西醫結合影像學雜志, 2014, 12(3):324-327.
7. 盧向彬, 周鑫, 史浩. CTA、CTU聯合應用在泌尿系統疾病中的應用價值研究[J]. 醫學影像學雜志, 2013, 23(7):1089-1091, 1110.
8. 趙子鳳, 柳澄, 趙寧, 等. Flash雙源CT在小兒低劑量CT尿路成像中的應用[J]. 醫學影像學雜志, 2014, 24(3):451-455.
9. 崔國強, 劉鐵鋼, 鄧昉, 等. 64排螺旋CT尿路成像質量與腎臟功能的相關性研究[J]. 實用醫學影像雜志, 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. 陳善錫, 高源統, 嚴志漢, 等. 探討泌尿系影像學檢查對雙腎盂輸尿管畸形與并發癥的診斷差異性研究[J]. 中國臨床醫學影像雜志, 2015, 26(1):59-61.
12. 孫建男, 高麗媛, 劉影, 等. 64排螺旋CT尿路成像的臨床應用價值探討[J]. 中國臨床醫學影像雜志, 2008, 19(9):620-622, 637.
13. 楊培紅, 王健. 16排螺旋CT三維重建技術在泌尿系的應用[J]. 中國CT和MRI雜志, 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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