对冠状动脉分数的光子计数探测器CT的量化准确性:试点研究
Mengzhen Wang1, Xu Zhang1, Jiqang Li1
1Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197 Ruijin Er Road, Shanghai, 200025, China.
The international journal of cardiovascular imaging
|August 7, 2024
概括
光子计数检测器CT (PCD-CT) 准确测量冠状动脉分数 (CACS) 在减少辐射剂量的情况下. 优化设置,如Sn100kV,90kV和120kV在闪电模式下是建议临床使用.
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:
- 冠状动脉分数 (CACS) 对心血管风险评估至关重要.
- 光子计数检测器CT (PCD-CT) 在CT成像中提供了潜在的进步.
- 优化PCD-CT扫描参数对于准确的CACS测量和剂量降低至关重要.
研究的目的:
- 在各种扫描设置中使用PCD-CT验证CACS测量的准确性.
- 为了确定最佳的PCD-CT扫描参数,平衡精度和辐射剂量.
- 将PCD-CT CACS测量结果与参考标准进行比较.
主要方法:
- 一个CACS幻影和12名患者使用PCD-CT扫描,使用各种模式 (序列,闪光) 和管电压 (90kV,120kV,140kV,Sn100kV,Sn140kV).
- 在70keV的PCD-CT收购被重建.
- 在序列模式下的能量整合探测器CT (EID-CT) 作为CACS计算的参考标准 (Agatston,质量,体积得分).
主要成果:
- PCD-CT与CACS的参考标准有很好的一致性 (幻影的ICC> 0.99,患者的ICC> 0.98).
- 与参考相比,PCD-CT在闪光模式下辐射剂量减少了16-75%.
- 在患者扫描中没有发生CACS类别的显著重新分类.
结论:
- 在各种扫描协议中,PCD-CT提供可重复和准确的CACS测量.
- 通过PCD-CT可显著降低辐射剂量,同时保持诊断准确度.
- 对于PCD-CT CACS的推临床设置包括Sn100kV,90kV和120kV在IQ20的闪电模式下.
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