Imaging of pulmonary vein anatomy using low-dose prospective ECG-triggered dual-source computed tomography
Imaging of pulmonary vein anatomy using low-dose prospective ECG-triggered dual-source computed tomography
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DOI：
10.1007/s00330-010-1744-4
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发表时间：
2010-08-01
影响因子：
5.9
通讯作者：
Pache, Gregor
中科院分区：
文献类型：
--
作者：
Blanke, Philipp;Baumann, Tobias;Pache, Gregor
为了前瞻性地研究可行性，在接受射频消融术的阵发性房颤患者中，使用前瞻性心电图（ECG）触发的连续双源（DS）数据采集在收缩末期进行肺静脉和左心房计算机断层扫描血管造影（CTA）的图像质量和辐射剂量估计。（平均年龄66.2 ± 12.6岁）阵发性房颤患者接受了前瞻性ECG触发的序贯DS-CTA，管电流（250 mAs/转）中心超过R峰250 ms。将管电压调整至BMI（< 25 kg/m（2）：100 kV，> 25 kg/m（2）：120 kV）。评估是否存在运动或阶梯状伪影。根据剂量长度乘积计算有效辐射剂量，所有数据集均可集成到电解剖标测系统中。22例患者（63%）为窦性心律（平均心率69.2 ± 11.1 bpm，变异性1.0 ± 1.7 bpm），13例（37%）显示房颤ECG模式（平均心率84.8 ± 16.6 bpm，变异性17.9 ± 7.5 bpm）。在3名房颤患者（23%）中观察到微小阶跃伪影。平均估计有效剂量分别为1.1 +/- 0.3和3.0 +/- 0.5 mSv，100和120 kV。肺静脉解剖成像是可行的，使用前瞻性心电图触发的连续数据采集在收缩末期，无论心率或心律在低辐射剂量的好处。
To prospectively investigate the feasibility, image quality and radiation dose estimates for computed tomography angiography (CTA) of the pulmonary veins and left atrium using prospective electrocardiography (ECG)-triggered sequential dual-source (DS) data acquisition at end-systole in patients with paroxysmal atrial fibrillation undergoing radiofrequency ablation.Thirty-five patients (mean age 66.2 +/- 12.6 years) with paroxysmal atrial fibrillation underwent prospective ECG-triggered sequential DS-CTA with tube current (250 mAs/rotation) centred 250 ms past the R-peak. Tube voltage was adjusted to the BMI (< 25 kg/m(2): 100 kV, > 25 kg/m(2): 120 kV). Presence of motion or stair-step artefacts was assessed. Effective radiation dose was calculated from the dose-length product.All data sets could be integrated into the electroanatomical mapping system. Twenty-two patients (63%) were in sinus rhythm (mean heart rate 69.2 +/- 11.1 bpm, variability 1.0 +/- 1.7 bpm) and 13 (37%) showed an ECG pattern of atrial fibrillation (mean heart rate 84.8 +/- 16.6 bpm, variability 17.9 +/- 7.5 bpm). Minor step artefacts were observed in three patients (23%) with atrial fibrillation. Mean estimated effective dose was 1.1 +/- 0.3 and 3.0 +/- 0.5 mSv for 100 and 120 kV respectively.Imaging of pulmonary vein anatomy is feasible using prospective ECG-triggered sequential data acquisition at end-systole regardless of heart rate or rhythm at the benefit of low radiation dose.