Investigating and Analyzing Reconstructed Images of MDCT Coronary Angiography

多切面電腦斷層冠狀動脈檢查重組影像偵測分析

李明哲(Ming-Che Lee) ； 莊克士(Keh-Shih Chuang) ； 陳秀珠(Hsiu-Chu Chen) ； 何上芸(Shang-Yun Ho) ； 李國維(Kwo-Whei Lee)

《台灣應用輻射與同位素雜誌》 5卷4期 (2009/12) Pp. 743-749

https://doi.org/10.29832/TJARI.200912.0001

摘要

To investigate and analyze reconstructed images of retrospective ECG gating multi-detector row computed tomography (MDCT) for each of the major coronary arteries during the cardiac cycle. Multi-detector row coronary artery CT angiographies obtained in 171 patients (103 men, 68 women; mean age, 55 years ±11; age range, 28-83 years) were reconstructed at 35%-85% of the cardiac cycle in increments of 10%. Two independent reviewers who specialize in cardiac radiology assessed the image quality, obtained with three-dimensional post-processing for segments 1-3 (right coronary artery), segments 5-8 (left main and left anterior descending coronary arteries), and segments 11 and 13 (left circumflex artery). Segments were defined according to American Heart Association (AHA) guidelines. The grades were assigned: 1, excellent; 2, good; 3, fair; 4, poor; and 5, very poor. The three-dimensional reconstructed image data were statistically analyzed with SPSS software version 10.0. The authors analyzed 171 patients' data with 2-way ANOVA and found the left anterior descending artery, left circumflex artery and right coronary artery all were best visualized at 75% of the cardiac cycle (p＜.05). Our results demonstrated that the reconstructed images of coronary arteries usually performed optimally during mid-to-late diastole cardiac cycle. 75% of the cardiac phase was the best visualization phase for all coronary arteries in this study.

關鍵字

多切面電腦斷層 ； 重組 ； 心週期 ； 心電圖

並列摘要

To investigate and analyze reconstructed images of retrospective ECG gating multi-detector row computed tomography (MDCT) for each of the major coronary arteries during the cardiac cycle. Multi-detector row coronary artery CT angiographies obtained in 171 patients (103 men, 68 women; mean age, 55 years ±11; age range, 28-83 years) were reconstructed at 35%-85% of the cardiac cycle in increments of 10%. Two independent reviewers who specialize in cardiac radiology assessed the image quality, obtained with three-dimensional post-processing for segments 1-3 (right coronary artery), segments 5-8 (left main and left anterior descending coronary arteries), and segments 11 and 13 (left circumflex artery). Segments were defined according to American Heart Association (AHA) guidelines. The grades were assigned: 1, excellent; 2, good; 3, fair; 4, poor; and 5, very poor. The three-dimensional reconstructed image data were statistically analyzed with SPSS software version 10.0. The authors analyzed 171 patients' data with 2-way ANOVA and found the left anterior descending artery, left circumflex artery and right coronary artery all were best visualized at 75% of the cardiac cycle (p＜.05). Our results demonstrated that the reconstructed images of coronary arteries usually performed optimally during mid-to-late diastole cardiac cycle. 75% of the cardiac phase was the best visualization phase for all coronary arteries in this study.

並列關鍵字

MDCT ； reconstruction window ； cardiac cycle ； ECG-gated