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双能量计算机断层扫描获得的肺血液体积:与肺血流的相关性

Jakob Wittenstein¹, Rudi Apolle^2,3,4,5, Martin Scharffenberg¹

¹Department of Anaesthesiology and Intensive Care Medicine, Pulmonary Engineering Group, Faculty of Medicine and University Hospital Carl Gustav Carus, TUD Dresden University of Technology, Fetscherstraße 74, Dresden, 01307, Germany.

Respiratory research

|October 22, 2025

概括

双能CT (DECT) 精确测量肺 perfusion,显示机械通风研究的希望. 重复的DECT扫描在没有持续的积累的情况下是可行的,有助于气体交换研究.

科学领域:

肺部生理学肺部生理学
医学成像医学成像
呼吸系统的机械学

背景情况:

肺气交换取决于通风和 perfusion 分布.
为了研究机械通风策略,需要准确,高分辨率的方法.
双能量CT (DECT) 可以导出区域性肺血液体积作为输液的替代品 (PP_DECT).

研究的目的:

为了评估PP_DECT的准确性,与用光标记微球 (PP_FLM) 测量的肺血流相比.
评估重复DECT测量的可行性,以评估肺 perfusion.

主要方法:

在麻醉猪中,PP_FLM和PP_DECT使用回归和布兰德-阿尔特曼分析进行了比较.
在双肺和单肺通风期间进行了测量,有和没有吸入氧化.
在四个小时内,评估了不同肺部区域的肺 perfusion,并监测积累.

主要成果:

在PP_FLM和PP_DECT之间发现了一个良好的整体关联 (R²=0.81).
PP_DECT高估了PP_FLM的高达30%,同意范围从-18%到18%.
同意度在通风的肺部区域最高,在不通风的区域最低;没有观察到持续的增强.

结论:

基于DECT的肺 perfusion 测量显示出有希望的准确性和可行性.
这种技术支持对机械通风策略的翻译研究.
重复测量对于研究通风-透气动态是可行的.

关键词:

双能量CT是双能量CT.有光标记的微球.区域性肺 perfusion 输液区域性肺 perfusion 输液区域性肺 perfusion 区域性肺 perfusion 区域性肺 perfusion 区域性肺 perfusion 阻断了血液的流动,减少了血液的流动.

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