Application of Dual-source Low-dose CT Flash Scanning in 3D Cardiac Imaging_West China Medical Journal

Authors：

 ZouMeng ,  LiZhenlin , PanXuelin , YuanYuan , QianLingling

Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China;

Corresponding?author：

LiZhenlin, Email: lzlcd01@126.com

Keywords：

Flash scanning; Low radiation dose; 3D heart

DOI：

10.7507/1002-0179.201600140

Video：

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Objective To discuss the value of dual-source CT Flash scanning in reducing the dose of radiation in 3D cardiac imaging. Method We collected 60 patients from March to August 2014 who should undergo cardiac 3D CT scanning before radiofrequency ablation. They were randomly divided into group A and B with 30 in each. Patients in group A underwent flash technology scanning, while those in group B accepted conventional retrospective electrocardiography-gated scanning. CARE Dose techniques were used to collect data. Scanning parameters were the same for both groups:collimation was 128×0.6 mm, reconstruction thickness was 0.75 mm, reconstruction interval was 0.7 mm, and field of view was 180-200 mm. After image acquisition, we measured the CT values and noise of left atrium and various branches of the pulmonary veins (upper left, lower left, upper right, and lower right). Statistical software was used for the two groups of images to analyze the carrier noise ratio (CNR), signal noise ratio (SNR), blinded scores, computed tomography dose index (CTDI_vol), and dose-length product (DLP) of the left atrium and pulmonary vein. Results CNR and SNR of the left atrium and various pulmonary veins between the two groups had no significant differences (P>0.05) . Blinded scores between the two groups were not significantly different (P>0.05) . CTDI_vol in group A and group B was respectively (2.92±0.38) and (20.15±12.09) mGy, with a significant difference (t=?7.803, P<0.001) . DLP of group A was (59.30±6.67) mGy·cm, significantly lower than that in group B [(334.43±216.71) mGy·cm] (t=?6.591, P<0.001) . Flash-efficient radiation dose was (0.83±0.94) mSv in group A, far below that in group B [(4.53±3.03) msv], and the difference was statistically significant (t=?6.684, P<0.001) . Conclusions Dual-source CT Flash technology applied in 3D cardiac scanning can reduce radiation dose as well as meet the needs of image diagnosis.

Citation： ZouMeng, LiZhenlin, PanXuelin, YuanYuan, QianLingling. Application of Dual-source Low-dose CT Flash Scanning in 3D Cardiac Imaging. West China Medical Journal, 2016, 31(3): 531-535. doi: 10.7507/1002-0179.201600140 Copy

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10.	Kalra MK, Maher MM, Toth TL, et al. Strategies for CT radiation dose optimization[J]. Radiology, 2004, 230(3) :619-628.
11.	World Health Organization. Technical Report Series, No. 894. Obesity:preventing and managing the global epidemic[R]. Geneva:World Health Organization, 2000.
12.	李爍, 王怡寧, 孔令燕, 等. 雙源CT前瞻性心電觸發螺旋掃描與序列掃描模式冠狀動脈成像的比較[J]. 中國醫學科學院學報, 2010, 32(6) :607-610, 后插3.
13.	佟海濱, 王小玲, 趙青, 等. 第二代雙源CT前門控FLASH掃描與序列掃描冠狀動脈成像比較[J]. 中國中西醫結合影像學雜志, 2011, 9(5) :400-404.
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1. 殷敏敏, 余永強, 錢銀峰, 等. 64層螺旋CT對肺靜脈的形態定量分析[J]. 中國醫學影像技術, 2007, 23(9) :1323-1326.
2. 晏子旭, 徐磊, 楊琳, 等. 320排容積CT低劑量左心房肺靜脈成像[J]. 中國醫學影像技術, 2010, 26(9) :1772-1774.
3. Nakayama Y, Awai K, Funama Y, et al. Lower tube voltage reduces contrast material and radiation doses on 16-MDCT aortography[J]. AJR Am J Roentgenol, 2006, 187(5) :W490-W497.
4. 鄭敏文, 趙宏亮, 徐健, 等. 多層螺旋CT主動脈低劑量與常規劑量掃描的對照研究[J]. 中國醫學影像技術, 2008, 24(3) :443-446.
5. 夏賓, 楊學華, 高劍波, 等. 新雙源CT Flash掃描冠狀動脈CT血管成像對冠狀動脈狹窄的評估效果[J]. 鄭州大學學報:醫學版, 2012, 47(6) :833-836.
6. 王怡寧, 李爍, 孔令燕, 等. 低劑量雙源CT前瞻性心電觸發大螺距掃描冠狀動脈造影的圖像質量和放射劑量[J]. 中國醫學科學院學報, 2010, 32(6) :597-600, 后插1-后插2.
7. 錢萍艷, 方向明, 丁國良, 等. 新雙源CT低劑量Flash心臟掃描技術在低心率患者冠狀動脈成像中的應用[J]. 南京醫科大學學報:自然科學版, 2012, 32(6) :863-865.
8. Ghaye B, Szapiro D, Dacher JN, et al. Percutaneous ablation for atrial fibrillation:the role of cross-sectional imaging[J]. Radiographics, 2003, 23(Suppl 1) :S19-S33; discussion S48-S50.
9. Tsao HM, Yu WC, Cheng HC, et al. Pulmonary vein dilation in patients with atrial fibrillation:detection by magnetic resonance imaging[J]. J Cardiovasc Electrophysiol, 2001, 12(7) :809-813.
10. Kalra MK, Maher MM, Toth TL, et al. Strategies for CT radiation dose optimization[J]. Radiology, 2004, 230(3) :619-628.
11. World Health Organization. Technical Report Series, No. 894. Obesity:preventing and managing the global epidemic[R]. Geneva:World Health Organization, 2000.
12. 李爍, 王怡寧, 孔令燕, 等. 雙源CT前瞻性心電觸發螺旋掃描與序列掃描模式冠狀動脈成像的比較[J]. 中國醫學科學院學報, 2010, 32(6) :607-610, 后插3.
13. 佟海濱, 王小玲, 趙青, 等. 第二代雙源CT前門控FLASH掃描與序列掃描冠狀動脈成像比較[J]. 中國中西醫結合影像學雜志, 2011, 9(5) :400-404.
14. 佟海濱, 趙青, 范洋洋, 等. 第二代雙源CT前門控冠狀動脈成像與冠狀動脈造影比較的初步研究[J]. 中國中西醫結合影像學雜志, 2012, 10(4) :301-304, 310, 封2.

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