周冠状动脉脂肪衰减指数的个体内差异 光子计数和能量整合探测器计算机断层扫描之间的测量
Giuseppe Tremamunno1, Milan Vecsey-Nagy2, Muhammad Taha Hagar3
1Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC (G.T., M.V-N., M.T.H., J.O., A.V-S., T.E., D.K.); Department of Medical Surgical Sciences and Translational Medicine, Sapienza University of Rome - Radiology Unit - Sant'Andrea University Hospital, Via di Grottarossa, 1035-1039, 00189 Rome, Italy (G.T.).
光子计数探测器 (PCD) -CT和能量整合探测器 (EID) -CT在周冠状脂肪组织 (PCAT) 脂肪减弱指数 (FAI) 中显示出差异. 代重建可以最大限度地减少这些差异,确保扫描仪之间的可比性.
科学领域:
- 医疗成像医学成像
- 放射学 放射学是一门学科.
- 心血管成像 - 心血管成像
背景情况:
- 冠周脂肪组织 (PCAT) 脂肪减弱指数 (FAI) 是心血管风险的标志物.
- 光子计数探测器 (PCD) -CT为心血管成像提供了与能量整合探测器 (EID) -CT相比的潜在优势.
研究的目的:
- 为了比较PCAT FAI测量的PCD-CT和EID-CT之间的个体内差异.
- 评估重建参数对PCAT FAI测量的影响.
主要方法:
- 预计将在30天内招募40名患者进行EID-CT和PCD-CT扫描.
- 使用相同的内核和切片厚度的重建,有或没有代重建.
- 使用已确定的值,自动测量冠状动脉PCAT FAI.
主要成果:
- 在所有容器和重建中,在EID-CT和PCD-CT之间观察到绝对PCAT FAI的显著差异 (p <.001).
- 当代重建关闭时,FAI从EID-CT降低到PCD-CT.
- 代重建使扫描仪之间的FAI差异最小化 (p > 0.06).
结论:
- 在EID-CT和PCD-CT之间,个人内PCATFAI测量有很大的差异.
- 代重建对于最大限度地减少FAI差异和确保扫描器之间的可比性至关重要.
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