用光谱光子计数CT对假体心脏门进行超高分辨率和K-Edge成像:一个幻影研究
Sara Boccalini1, Charles Mayard, Hugo Lacombe
1From the University of Lyon, INSA-Lyon, University Claude Bernard Lyon 1, Villeurbanne, France (S.B., F.D.); Department of Cardiovascular and Thoracic Radiology, Louis Pradel Hospital, Hospices Civils de Lyon, Bron, France (S.B., C.M., S.S.-M., L.B., P.D.); University Lyon, INSA-Lyon, University Claude Bernard Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS UMR 5220, Villeurbanne, France (H.L., S.S.-M., L.B., P.D.); Philips Healthcare, Suresnes, France (M.V.); Department of Cardiology, Louis Pradel Hospital, Hospices Civils de Lyon, Bron, France (F.D.); Department of Radiology and Nuclear Medicine, Erasmus Medical Center, Rotterdam, the Netherlands (R.B.); and Department of Cardiac Surgery, Louis Pradel Hospital, Hospices Civils de Lyon, Bron, France (M.P.).
光子计数检测器CT (PCD-CT) 显著提高了假体心脏膜成像质量,而不是双能量双层CT (DEDL-CT),减少了人工物并提高了病变的可见性. 然而,即使使用PCD-CT,小病变仍然具有挑战性,尽管K边缘成像进一步减少了文物.
科学领域:
- 医疗成像医学成像
- 放射学 放射学是指放射学
- 心血管成像 - 心血管成像
背景情况:
- 心脏计算机断层扫描 (CT) 器件的局限性阻碍了人造心脏门 (PHV) 并发症评估.
- 光子计数检测器CT (PCD-CT) 具有克服这些局限性的潜力.
研究的目的:
- 使用PCD-CT与双能量双层CT (DEDL-CT) 的假心 (PHV) 的图像质量进行比较.
主要方法:
- 用DEDL-CT和PCD-CT与匹配的获取参数在幻影中扫描金属和生物PHV.
- 病变被附着在门上,并重复扫描,并没有延伸环.
- 专家读者进行了客观 (厚度,工件) 和主观 (协同性,度) 的分析.
主要成果:
- 与DEDL-CT相比,PCD-CT显示金属结构厚度降低和艺术品开花.
- 用PCD-CT显著减少金属文物 (11%与40%的voxels相比).
- 对于门结构和病变,PCD-CT提供了卓越的可见性和清晰度,而的K边缘成像进一步减少了工件.
结论:
- 与DEDL-CT相比,PCD-CT显著提高了PHV的客观和主观图像质量.
- 门结构上的毫米小的病变仍然是PCD-CT的一个挑战.
- K边缘成像提供了额外的工件减少好处.
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