期刊
DIAGNOSTICS
卷 12, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/diagnostics12030612
关键词
computed tomography; catheter ablation; radiation
资金
- European Regional Development Fund [CZ.02.1.01/0.0/0.0/16_019/0000868]
- Medical University of Silesia in Poland [PCN-1-005/N/0/K, PCN-1-073/N/1/K]
- Faculty of Medicine, Masaryk University [MUNI/A/1462/2021]
- Anneliese and Mieczysaw Kowin Foundation Scholarship
This study developed and validated low-dose CT scanning protocols of the left atrium for radiofrequency catheter ablation (RFA) guidance. Optimized scanning protocols significantly reduced radiation dose without affecting contrast media and signal-to-noise ratio.
(1) Background: Computer tomography (CT) is an imaging modality used in the pre-planning of radiofrequency catheter ablation (RFA) procedure in patients with cardiac arrhythmias. However, it is associated with a considerable ionizing radiation dose for patients. This study aims to develop and validate low-dose CT scanning protocols of the left atrium (LA) for RFA guidance. (2) Methods: 68 patients scheduled for RFA of atrial fibrillation were sequentially assigned to four groups of ECG-gated scanning protocols, based on the set tube current (TC): Group A (n = 20, TC = 33 mAs), Group B (n = 18, TC = 67 mAs), Group C (n = 10, TC = 135 mAs), and control Group D (n = 20, TC = 600 mAs). We used a 256-row multidetector CT with body weight-dependent tube voltage of 80 kVp (<70 kg), 100 kVp (70-90 kg), and 120 kVp (>90 kg). We evaluated scanning parameters including radiation dose, total scanning procedure time and signal-to-noise ratio (SNR). (3) Results: The average effective radiation dose (ED) was lower in Group A in comparison to Group B, C and D (0.83 (0.76-1.10), 1.55 (1.36-1.67), 2.91 (2.32-2.96) and 9.35 (8.00-10.04) mSv, p < 0.05). The total amount of contrast media was not significantly different between groups. The mean SNR was 6.5 (5.8-7.3), 7.1 (5.7-8.2), 10.8 (10.1-11.3), and 12.2 (9.9-15.7) for Group A, B, C and D, respectively. The comparisons of SNR in group A vs. B and C vs. D were without significant differences. (4) Conclusions: Optimized pre-ablation CT scanning protocols of the LA can reduce an average ED by 88.7%. Three dimensional (3D) models created with the lowest radiation protocol are useful for the integration of electro-anatomic-guided RFA procedures.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据