Prospective Coronary CT Angiography 128-MDCT Versus Retrospective 64-MDCT: Improved Image Quality and Reduced Radiation Dose
Prospective Coronary CT Angiography 128-MDCT Versus Retrospective 64-MDCT: Improved Image Quality and Reduced Radiation Dose
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DOI：
10.1016/j.hlc.2010.09.005
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发表时间：
2011-02-01
影响因子：
2.6
通讯作者：
Costa, Joao C.
中科院分区：
文献类型：
--
作者：
Duarte, Ricardo;Fernandez, Gabriel;Costa, Joao C.
目的：计算机断层扫描冠状动脉成像的新技术旨在降低辐射剂量，同时保持图像质量。我们研究的目的是比较放射剂量和图像质量参数的冠状动脉计算机断层扫描血管造影（CCTA）进行回顾性64-MDCT和前瞻性128-MDCT. Patients和Methods：一系列的77例连续患者首先随机分为回顾性64-MDCT（n = 37）或前瞻性128-MDCT（n = 40）CCTA。回顾性64-MDCT组中的所有患者均采用管电流调制作为降低剂量的策略进行扫描。记录有关采集时间和辐射剂量的数据。两名设盲放射科医生使用四分量表（1，优; 4，差）独立评估所有冠状动脉节段的图像质量。结果：性别、年龄、体重、心率差异无统计学意义。前瞻性和回顾性ECG门控MDCT组的CTTA有效辐射剂量分别为2.1 +/-0.9和8.2 +/-4 mSv。前瞻性128-MDCT组的平均图像质量评分为2.2 ± 0.9分，回顾性64-MDCT组为1.4 ± 0.7分，平均差异为0.8分（置信区间：0.9至0.7）。在选定的患者中，与使用回顾性ECG门控的64-MDCT相比，使用前瞻性ECG门控的128-MDCT的CCTA提供了更高的图像质量和显著更低的辐射剂量。（Heart，Lung and Circulation 2011; 20：119 - 125）（C）2010年澳大利亚心胸外科医师学会和澳大利亚和新西兰心脏学会。爱思唯尔公司出版All rights reserved.
Objective: New technologies for computed tomography coronary arteries imaging aim to reduce the radiation dose whilst maintaining image quality. The purpose of our study was to compare radiation dose and image quality parameters of Coronary Computed Tomography Angiography (CCTA) performed with retrospective 64-MDCT and prospective 128-MDCT.Patients and Methods: A series of 77 consecutive patients were first randomised to either retrospective 64-MDCT (n = 37) or prospective 128-MDCT (n = 40) for CCTA. All patients in the retrospective 64-MDCT group were scanned with tube current modulation as strategy for reduction dose. Data regarding acquisition time and radiation dose were recorded. Two blinded radiologists independently assessed image quality of all coronary segments by using a four-point scale (1, excellent; 4, poor). Discrepancies were settled by consensus.Results: No significant differences were found regarding sex, age, body weight and heart rate. CTTA effective radiation dose was 2.1 +/- 0.9 vs. 8.2 +/- 4 mSv in prospective and retrospective ECG-gating MDCT groups, respectively. Mean image quality score was 2.2 +/- 0.9 for prospective 128-MDCT group and 1.4 +/- 0.7 points for retrospective 64-MDCT representing a mean difference of 0.8 points (CI: 0.9 to 0.7).Conclusion: In selected patients, CCTA using a 128-MDCT with prospective ECG-gating provides higher image quality with significant lower radiation dose when compared to 64-MDCT using retrospective ECG-gating. (Heart, Lung and Circulation 2011;20:119-125) (C) 2010 Australasian Society of Cardiac and Thoracic Surgeons and the Cardiac Society of Australia and New Zealand. Published by Elsevier Inc. All rights reserved.