The Effect of Snapshot Freeze on Improving Image Quality of Coronary CT Angiography in Patients with High Heart Rate_West China Medical Journal

Authors：

 ZHOUYing , CHENJiao ,  HEChuan-dong , LIUQi-yu

Department of Radiology, Mianyang Central Hospital, Mianyang, Sichuan 621000, P. R. China;

Corresponding?author：

HEChuan-dong, Email: hecd735@163.com

Keywords：

Snapshot freeze; Coronary CT angiography; Image quality; Motion-corrected

DOI：

10.7507/1002-0179.20150588

Video：

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Objective To explore the effect of snapshot freeze (SSF) on the image quality of coronary artery in 64 multislice spiral CT for patients with high heart rate. Methods We retrospectively analyzed the clinical data of 98 patients with an mean heart rate of ≥ 70 beats/min who underwent coronary CT angiography examination between August 2013 and February 2014. According to the inclusion criteria, 60 patients were included in our study. The image quality of standard reconstruction (STD) and motion-corrected (MC) reconstruction based on SSF platform were analyzed. The image quality was classified into 4 grades, and the image quality of coronary segments named according to AHA standard was evaluated. Then, we compared the image quality between the two different reconstruction methods. Results Altogether 180 coronary arteries and 795 coronary segments were evaluated. Before MC reconstruction, there were 133 (73.89%) arteries and 287 (36.10%) segments had pseudomorph, while after MC reconstruction, those two numbers were 89 (49.44%) and 150 (18.87%) (P<0.05). The right coronary artery (RCA) had a higher rate of pseudomorph and a lower image quality score[91.67% (55/60), 3.32±0.40] than left anterior descending artery[60.00% (36/60), 3.69±0.42] and left circumflex artery[70.00% (42/60), 3.44±0.55], especially the S2[90.00% (54/60), 2.45±0.85]. Overall image quality was higher with the use of MC reconstruction on per-artery level (P<0.05) and most of the per-segment level (P<0.05) compared with STD, especially for RCA and its segments (P<0.05). Conclusion SSF improves image quality of coronary artery in patients with high heart rate, especially for RCA.

Citation： ZHOUYing, CHENJiao, HEChuan-dong, LIUQi-yu. The Effect of Snapshot Freeze on Improving Image Quality of Coronary CT Angiography in Patients with High Heart Rate. West China Medical Journal, 2015, 30(11): 2076-2080. doi: 10.7507/1002-0179.20150588 Copy

1.	Hsieh J, Londt J, Vass M, et al. Step-and-shoot data acquisition and reconstruction for cardiac X-ray computed tomography[J]. Med Phys, 2006, 33(11):4236-4248.
2.	Tang Q, Cammin J, Srivastava S, et al. A fully four-dimensional, iterative motion estimation and compensation method for cardiac CT[J]. Med Phys, 2012, 39(7):4291-4305.
3.	Nagatani Y, Takahashi M, Takazakura R, et al. Multidetector-row computed tomography coronary angiography:optimization of image reconstruction phase according to the heart rate[J]. Circ J, 2007, 71(1):112-121.
4.	劉斌, 趙紅, 吳興旺, 等. 64層螺旋CT冠狀動脈成像圖像質量的相關影響因素分析(心臟體模模擬實驗)[J]. 中華放射學雜志, 2006, 40(9):980-983.
5.	Sun G, Li M, Jiang XS, et al. 320-detector row CT coronary angiography:effects of heart rate and heart rate variability on image quality, diagnostic accuracy and radiation exposure[J]. Br J Radiol, 2012, 85(116):e388-e394.
6.	Ritchie CJ, Godwin JD, Crawford CR, et al. Minimum scan speeds for suppression of motion artifacts in CT[J]. Radiology, 1992, 185(1):37-42.
7.	Pontone G, Andreini D, Bartorelli AL, et al. Feasibility and accuracy of a comprehensive multidetector computed tomography acquisition for patients referred for balloon-expandable transcatheter aortic valve implantation[J]. Am Heart J, 2011, 161(6):1106-1113.
8.	Husmann L, Leschka S, Desbiolles L, et al. Coronary artery motion and cardiac phases:dependency on heart rate ——implications for CT image reconstruction[J]. Radiology, 2007, 245(2):567-576.
9.	Ropers U, Ropers D, Pflederer T, et al. Influence of heart rate on the diagnostic accuracy of dual-source computed tomography coronary angiography[J]. J Am Coll Cardiol, 2007, 50(25):2393-2398.
10.	Flohr TG, Mccollough CH, Bruder H, et al. First performance evaluation of a dual-source CT (DSCT) system[J]. Eur Radiol, 2006, 16(2):256-268.
11.	錢萍艷, 方向明, 陳宏偉, 等. 雙源CT自適應前瞻性心電門控序列掃描技術在高心率患者低劑量冠狀動脈成像中的應用價值[J]. 臨床放射學雜志, 2013, 32(7):1039-1043.
12.	陳文靜, 劉文亞, 王海濤, 等. 心率、扇區重組、時相重建對64層螺旋CT冠狀動脈成像質量的影響[J]. 中國醫學影像技術, 2008, 24(5):785-788.
13.	Schroeder S, Kopp AF, Kuettner A, et al. Influence of heart rate on vessel visibility in noninvasive coronary angiography using new multislice computed tomography:experience in 94 patients[J]. Clin Imaging, 2002, 26(2):106-111.
14.	Leipsic J, Labounty TM, Hague CJ, et al. Effect of a novel vendor-specific motion-correction algorithm on image quality and diagnostic accuracy in persons undergoing coronary CT angiography without rate-control medications[J]. J Cardiovasc Comput Tomogr, 2012, 6(3):164-171.
15.	Rohkohl C, Bruder H, Stierstorfer K, et al. Improving best-phase image quality in cardiac CT by motion correction with MAM optimization[J]. Med Phys, 2013, 40(3):031901.

1. Hsieh J, Londt J, Vass M, et al. Step-and-shoot data acquisition and reconstruction for cardiac X-ray computed tomography[J]. Med Phys, 2006, 33(11):4236-4248.
2. Tang Q, Cammin J, Srivastava S, et al. A fully four-dimensional, iterative motion estimation and compensation method for cardiac CT[J]. Med Phys, 2012, 39(7):4291-4305.
3. Nagatani Y, Takahashi M, Takazakura R, et al. Multidetector-row computed tomography coronary angiography:optimization of image reconstruction phase according to the heart rate[J]. Circ J, 2007, 71(1):112-121.
4. 劉斌, 趙紅, 吳興旺, 等. 64層螺旋CT冠狀動脈成像圖像質量的相關影響因素分析(心臟體模模擬實驗)[J]. 中華放射學雜志, 2006, 40(9):980-983.
5. Sun G, Li M, Jiang XS, et al. 320-detector row CT coronary angiography:effects of heart rate and heart rate variability on image quality, diagnostic accuracy and radiation exposure[J]. Br J Radiol, 2012, 85(116):e388-e394.
6. Ritchie CJ, Godwin JD, Crawford CR, et al. Minimum scan speeds for suppression of motion artifacts in CT[J]. Radiology, 1992, 185(1):37-42.
7. Pontone G, Andreini D, Bartorelli AL, et al. Feasibility and accuracy of a comprehensive multidetector computed tomography acquisition for patients referred for balloon-expandable transcatheter aortic valve implantation[J]. Am Heart J, 2011, 161(6):1106-1113.
8. Husmann L, Leschka S, Desbiolles L, et al. Coronary artery motion and cardiac phases:dependency on heart rate ——implications for CT image reconstruction[J]. Radiology, 2007, 245(2):567-576.
9. Ropers U, Ropers D, Pflederer T, et al. Influence of heart rate on the diagnostic accuracy of dual-source computed tomography coronary angiography[J]. J Am Coll Cardiol, 2007, 50(25):2393-2398.
10. Flohr TG, Mccollough CH, Bruder H, et al. First performance evaluation of a dual-source CT (DSCT) system[J]. Eur Radiol, 2006, 16(2):256-268.
11. 錢萍艷, 方向明, 陳宏偉, 等. 雙源CT自適應前瞻性心電門控序列掃描技術在高心率患者低劑量冠狀動脈成像中的應用價值[J]. 臨床放射學雜志, 2013, 32(7):1039-1043.
12. 陳文靜, 劉文亞, 王海濤, 等. 心率、扇區重組、時相重建對64層螺旋CT冠狀動脈成像質量的影響[J]. 中國醫學影像技術, 2008, 24(5):785-788.
13. Schroeder S, Kopp AF, Kuettner A, et al. Influence of heart rate on vessel visibility in noninvasive coronary angiography using new multislice computed tomography:experience in 94 patients[J]. Clin Imaging, 2002, 26(2):106-111.
14. Leipsic J, Labounty TM, Hague CJ, et al. Effect of a novel vendor-specific motion-correction algorithm on image quality and diagnostic accuracy in persons undergoing coronary CT angiography without rate-control medications[J]. J Cardiovasc Comput Tomogr, 2012, 6(3):164-171.
15. Rohkohl C, Bruder H, Stierstorfer K, et al. Improving best-phase image quality in cardiac CT by motion correction with MAM optimization[J]. Med Phys, 2013, 40(3):031901.

West China Medical Journal

The Effect of Snapshot Freeze on Improving Image Quality of Coronary CT Angiography in Patients with High Heart Rate

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