:: 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:   (800 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