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使用单个体积扫描进行低剂量定量CT心肌流量测量:幻影和动物验证

Logan Hubbard¹, Sabee Molloi¹

¹University of California, Irvine, Department of Radiological Sciences, Irvine, California, United States.

Journal of medical imaging (Bellingham, Wash.)

|November 2, 2023

概括

这项研究验证了一种低剂量,单体积CT技术,用于测量心肌动脉血流. 该方法在幻影和猪模型中准确量化血流,为心脏成像提供了一个有前途的工具.

科学领域:

心血管成像 - 心血管成像
医学物理医学物理

背景情况:

量化心肌流量 (MF) 评估对于诊断和管理冠状动脉疾病至关重要.
传统的基于CT的MF技术通常需要多次扫描或更高的辐射剂量.

研究的目的:

为了验证一种新的低剂量,单体积定量CT心肌流量技术.
在心血管幻影和冠状动脉疾病的猪模型中评估这项技术的准确性.

主要方法:

动态CT成像心血管幻影和六只猪的动态CT成像,诱导冠状动脉狭窄.
施用对比剂,并模拟动态玻尿酸追踪和峰值体积扫描采集.
第一次通过单间模拟以导出定量流量,假设均的前对比心肌衰减.

主要成果:

CT衍生流量测量显示,与幻影中的参考超声波流量 (R2 = 0.96) 和猪中的微球流量 (R2 = 0.93) 有很强的相关性.
每次CT测量的有效辐射剂量低至1.21 mSv.
该技术在休息和腺酸应激条件下都表现出准确性.

结论:

单体积定量CT流量技术提供了准确的心肌流量测量 (mL/min/g).
它只需要玻尿酸追踪数据,均的前对比衰减,以及在峰值前动脉增强附近的单次扫描.
这种方法可以在临床环境中准确,低剂量评估心肌流量.

关键词:

冠状动脉疾病是一种冠状动脉疾病.冠状动脉计算机断层扫描血管图谱动态计算机断层扫描 (Dynamic Computed Tomography) 是一种动态计算机断层扫描.肌肉心脏的流量是什么

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