Sixteen-detector Row CT Coronary Angiography: Investigating and Analyzing Reconstructed Images

十六切面電腦斷層冠狀動脈檢查及重組影像偵測分析

李明哲(Ming-Che Lee) ； 林政勳(Cheng-Hsun Lin) ； 何上芸(Shang-Yun Ho) ； 廖瓊櫻(Chiung-Ying Liao) ； 楊良友(Albert D. Yang) ； 張玉君(Yu-Jun Chang) ； 李國維(Kwo-Whei Lee)

《中華放射線醫學雜誌》 31卷4期 (2006/08) Pp. 159-165

摘要

To investigate and analyze reconstructed images of retrospective ECG gating 16–detector row computed tomography for each of the major coronary arteries during the cardiac cycle under 65 heartbeats per minute.
16-detector row coronary artery CT angiographies obtained in 97 patients (63 men, 34 women; mean age, 56 years ±13; age range, 30-82 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 the textbook of de Feyter PJ. The grades were assigned: 1, excellent; 2, good; 3, fair; 4, poor; and 5, very poor.
The three-dimensional reconstructed image score data were statistically analyzed with SPSS software version 10.0. The authors analyzed 97 patients' data with 2-way ANOVA and found the left anterior descending artery, left circumflex artery and right coronary artery all 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 when patients' heart rate is under 65 bpm. 75% of the cardiac phase was the best visualization phase for all coronary arteries in this study.

關鍵字

心週期 ； 多切面電腦斷層 ； 重組

並列摘要

To investigate and analyze reconstructed images of retrospective ECG gating 16–detector row computed tomography for each of the major coronary arteries during the cardiac cycle under 65 heartbeats per minute.
16-detector row coronary artery CT angiographies obtained in 97 patients (63 men, 34 women; mean age, 56 years ±13; age range, 30-82 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 the textbook of de Feyter PJ. The grades were assigned: 1, excellent; 2, good; 3, fair; 4, poor; and 5, very poor.
The three-dimensional reconstructed image score data were statistically analyzed with SPSS software version 10.0. The authors analyzed 97 patients' data with 2-way ANOVA and found the left anterior descending artery, left circumflex artery and right coronary artery all 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 when patients' heart rate is under 65 bpm. 75% of the cardiac phase was the best visualization phase for all coronary arteries in this study.

並列關鍵字

Cardiac cycle ； Multi-detector row CT ； Reconstruction