:: Volume 16, Issue 2 (4-2018) ::
Int J Radiat Res 2018, 16(2): 225-233 Back to browse issues page
Prospective-triggered high-pitch spiral versus sequential dual-source CT coronary angiography: comparison of image quality and radiation dose
Y. Zhuang , W. Huang , Y. Shi , G. Bo , D. Lu , J. Zhang , D. Kong , Y. Shi , B. Wang Dr.
Binzhou Medical University, No. 346, Guanhai Road, Laishan District, Yantai 264003, Shandong, China , binwang001@aliyun.com
Abstract:   (620 Views)
Background: Prospectively electrocardiography (ECG)-triggered high-pitch spiral coronary computed tomography angiography (CCTA) is a unique scan mode for dual-source CT (DSCT). Our reports aim to compare image quality and radiation dose of CCTA using high-pitch spiral or sequential acquisition mode in patients with low and stable heart rates. Materials and Methods: Patients with low and stable heart rates (HR) (HR ≤ 70 beats per minute [bpm]; heart rate variability [HRV] < 10 bpm) were randomly assigned to high-pitch spiral mode (group A; n = 80) or sequential acquisition mode (group B; n = 80). Image quality scores, image noise, effective radiation dose and influencing factors on image quality were assessed.  Results: Mean image quality scores were 1.51 ± 0.32 and 1.70 ± 0.38 for groups A and B (P < 0.05), respectively. Image noises of the two groups were 19.05±4.70 Hu and 27.21±8.88 Hu (P < 0.05). Contrast media cost in group A was lower than group B (P < 0.05). No statistical difference was found in the rate of diagnostic patients between the two groups (P = 0.416). The estimated radiation dose of group A was 26.0% reduced compared with group B (0.74 ± 0.34 mSv vs. 1.00 ± 0.48 mSv, P < 0.05). Conclusion: In patients with regular and low heart rates, the prospectively high-pitch spiral acquisition mode can reduce radiation dose and contrast media cost while maintaining image quality compared with the prospectively sequential mode.
Keywords: Tomography, X-ray computed, coronary angiography, image quality, radiation dose.
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Type of Study: Original Research | Subject: Radiation Biology

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Volume 16, Issue 2 (4-2018) Back to browse issues page