心血管植入式电子设备的成像利用光子计数探测器进行计算机断层扫描
Simon Schalla1, Joachim E Wildberger, Mitch J F G Ramaekers
1From the Department of Cardiology, Maastricht University Medical Center, Maastricht, the Netherlands (S.S., K.V.); Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, the Netherlands (S.S., J.E.W., M.J.F.G.R., C.M., M.C.M., L.S., T.G.F.); Cardiovascular Research Institute Maastricht (CARIM), Maastricht, the Netherlands (S.S., J.E.W., M.J.F.G.R., C.M., L.S., K.V.); Bayer AG, Berlin, Germany (M.C.M.); and Computed Tomography Division, Siemens Healthineers AG, Forcheim, Germany (T.G.F.).
具有代金属工件减少 (IMAR) 的光子计数检测器CT (PCD-CT) 有效地成像心血管植入式电子设备 (CIED) 线索. 优化的协议减少了金属工件,改善了设备并发症的可视化.
科学领域:
- 医疗成像医学成像
- 放射学 放射学是一门学科.
- 心血管技术的心血管技术
背景情况:
- 心血管植入式电子设备 (CIED) 导线的计算机断层扫描 (CT) 成像受到重大金属工件的挑战.
- 光子计数检测器CT (PCD-CT) 由于其高分辨率和对比能力,为改善成像提供了潜力.
- 减少金属文物对于可视化CIED相关并发症,如穿孔,感染或静脉阻塞至关重要.
研究的目的:
- 为了评估各种扫描和重建参数对CIED使用PCD-CT的可视化效果的影响.
- 开发一个优化的扫描和重建协议,用于成像CIED带有减少金属文物.
- 评估PCD-CT中代金属工件减少算法 (IMAR) 对CIED成像的有效性.
主要方法:
- 在使用双源PCD-CT以标准和超高分辨率 (UHR) 模式的幻影中成像了五个CIED线索.
- 用不同的切片厚度,卷积内核和虚拟单能能量水平重建图像,有和没有IMAR.
- 由三名观察员进行客观文物评估和主观图像质量评估.
主要成果:
- 金属文物随着更利的核和更高的keV水平而增加;切片厚度没有显著影响文物.
- 在所有测试参数中,IMAR有效地减少了工件,而"神经线圈"设置显示了最佳性能.
- 最薄的切片和最尖的芯片改善了细结构的划分,而更软的芯片和更厚的切片有助于可视化一般的外观和相邻的解剖学.
结论:
- 与IMAR相结合的PCD-CT可实现CIED线索的高质量成像,揭示细节而不会掩盖邻近结构.
- 为CIED领先成像,建议采用一个优化的协议,包括UHR采集与两个重建 (0.2mm/Bv56和0.6mm/Bv40,使用IMAR).
- 使用IMAR的PCD-CT显著提高了评估CIED并发症的诊断潜力.
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