Quantitative Assessment of Image Quality in 64-Slice-Computed Tomography of Coronary Arteries in Subjects Undergoing Screening for Coronary Artery Disease

六十四切面電腦斷層攝影篩檢冠狀動脈影像品質之參數定量分析

楊麗華(Li-Hwa Yang) ； 吳定國(Ding-Kwo Wu) ； 陳巧雲(Chiao-Yun Chen) ； 劉金昌(Gin-Chung Liu) ； 謝賜吉(Tsyh-Jyi Hsieh) ； 趙垂勳(Twei-Shiun Jaw) ； 黃淑媛(Shu-Yuan Huang) ； 林倩仲(Chien-Chung Lin) ； 許瑞昇(Jui-Sheng Hsu)

《The Kaohsiung Journal of Medical Sciences》 26卷1期 (2010/01) Pp. 21-29

摘要

Faculty of Medicine, 3Graduate Institute of Medicine College of Medicine, and 4Department of Medical Imaging, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan. Accurate and consistent visualization of the entire coronary system with high-grade imaging quality is crucial for routine applications of multi-detector-computed tomography (MDCT) coronary angiography. To determine the imaging quality of 64-slice-MDCT coronary angiography, we respectively explored the quantitative parameters of imaging quality in 105 consecutive subjects (71 men, 34 women; aged 58.66 ± 10.62 years) who underwent 64-slice-MDCT coronary angiography to screen for coronary disease. The interobserver agreement for semi-quantitative image quality, visible length, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of the coronary arteries was good. The SNR and CNR of the proximal segments of the coronary arteries were superior to that of the distal segments of coronary arteries (p＜0.001). The visible length of the stenosed right coronary artery was significantly shorter than that of the non-stenosed right coronary artery (p=0.03). The SNR and CNR of the stenosed and non-stenosed coronary arteries revealed no significant difference (p＞0.05). Body weight and body mass index were inversely related to the SNR and CNR of the aorta (p＜0.001). In conclusion, 64-slice-MDCT coronary angiography can provide excellent imaging quality of coronary arteries in subjects undergoing screening for coronary disease, although the SNR and CNR were relatively low at the distal segments of coronary arteries.

關鍵字

電腦斷層攝影 ； 冠狀動脈

並列摘要

Faculty of Medicine, 3Graduate Institute of Medicine College of Medicine, and 4Department of Medical Imaging, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan. Accurate and consistent visualization of the entire coronary system with high-grade imaging quality is crucial for routine applications of multi-detector-computed tomography (MDCT) coronary angiography. To determine the imaging quality of 64-slice-MDCT coronary angiography, we respectively explored the quantitative parameters of imaging quality in 105 consecutive subjects (71 men, 34 women; aged 58.66 ± 10.62 years) who underwent 64-slice-MDCT coronary angiography to screen for coronary disease. The interobserver agreement for semi-quantitative image quality, visible length, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of the coronary arteries was good. The SNR and CNR of the proximal segments of the coronary arteries were superior to that of the distal segments of coronary arteries (p＜0.001). The visible length of the stenosed right coronary artery was significantly shorter than that of the non-stenosed right coronary artery (p=0.03). The SNR and CNR of the stenosed and non-stenosed coronary arteries revealed no significant difference (p＞0.05). Body weight and body mass index were inversely related to the SNR and CNR of the aorta (p＜0.001). In conclusion, 64-slice-MDCT coronary angiography can provide excellent imaging quality of coronary arteries in subjects undergoing screening for coronary disease, although the SNR and CNR were relatively low at the distal segments of coronary arteries.

並列關鍵字

computed tomography ； coronary artery