Feasibility analysis of wide-detector CT coronary angiography using three-low scanning technology(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2025年第3期
- Page:
- 374-380
- Research Field:
- 医学影像物理
- Publishing date:
Info
- Title:
- Feasibility analysis of wide-detector CT coronary angiography using three-low scanning technology
- Author(s):
- ZHANG Zixiong1; 2; QIAO Wenjun2; ZHANG Jingjing2; YANG Manman2; CHEN Jiayi2; ZHOU Meijuan1
- 1. School of Public Health, Southern Medical University, Guangzhou 510515, China; 2. Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
- Keywords:
- coronary artery; three-low scanning; radiation dose; injection rate; contrast agent dosage
- PACS:
- R318R816
- DOI:
- 10.3969/j.issn.1005-202X.2025.03.014
- Abstract:
- Objective To analyze various scanning parameters and contrast agent injection schemes, and explore the feasibility of three-low scanning technology characterized by lower radiation dose, slower injection rate and reduced contrast agent dosage in coronary angiography with wide-detector CT. Methods A total of 210 patients who underwent coronary angiography were recruited and randomly divided into group A (routine group, n=105) and group B (three-low group, n= 105), and all of them were examined using the Revolution CT from the American GE company. Group A and group B adopted 120 and 100 kV tube voltages, respectively. The contrast injection rate and contrast agent dosage were calculated using formulas based on body mass index and beat per minute. Image quality was objectively evaluated using CT number, signal-tonoise ratio and contrast-to-noise ratio, and subjectively scored using Likert 5-point method. Results No statistical differences were found in the basic data between two groups (P>0.05). The CT numbers of the aortic sinus orifice in coronary artery images obtained from group A and group B were (442.70±58.26) and (454.11±62.36) HU, respectively. The differences between two groups in CT number, image score, signal-to-noise ratio, and contrast-to-noise ratio were trivial (P>0.05), while statistically significant differences were noted in injection rate, contrast agent dosage, tube current, and effective radiation dose (P<0.05). Group B reduced the effective radiation dose by 33.89% as compared with group A. Conclusion Based on the patient’s body mass index and beat per minute, a personalized contrast agent injection scheme can be developed. Both routine group and three-low group can obtain image quality that meets imaging diagnosis requirements, and the latter has better image quality, demonstrating that the three-low scheme benefits the patients more for it can reduce the patient’s radiation dose and contrast agent dosage while achieving higher image quality.
Last Update: 2025-03-27