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旋转的辐射注射模式用于高度敏感的电阻断层扫描人类肺部异常

Oumaima Bader¹, Najoua Essoukri Ben Amara², Oliver G Ernst³

¹Professorship of Measurements and Sensor Technology, Chemnitz University of Technology, Reichenhainerstrasse 70, Chemnitz, 09111, GERMANY.

Physiological measurement

|January 13, 2025

概括

一种新的电阻断层扫描 (EIT) 电流注射模式通过增加异常的电流密度来改善肺部成像. 与传统方法相比,这种新的旋转辐射图案提高了检测肺部异常的灵敏度.

科学领域:

生物医学工程生物医学工程
医疗成像医学成像
计算机建模计算建模

背景情况:

电阻断层扫描 (EIT) 是一种非侵入性的肺成像技术.
重建深胸部区域的图像是具有挑战性的,因为边界电压对内部导电率变化的敏感性较低.
目前的注射模式显著影响EIT对组织变化的敏感性.

研究的目的:

引入和评估EIT使用旋转辐射激发的新型电流注入模式.
将拟议模式的有效性与常见模式进行比较 (相邻,跳过1,相反).
评估肺部异常的检测,包括类似癌症的模型,使用3D计算胸部模型.

主要方法:

开发了一个具有现实的几何和电气性能的人类胸部的3D计算模型.
创建了代表健康和不健康肺部状态的模型,包括各种位置的异常.
使用有限元分析 (FEA) 将新模式与相邻,跳过1和相反模式进行比较.

主要成果:

新的旋转辐射图案在模拟的肺结节中实现了最大的电流密度.
峰值电流密度值因异常位置而异,达到145.24 x 10^-9 A.M.
与传统模式相比,新模式对异常位置的变化具有更高的灵敏度.

结论:

拟议的旋转辐射电流注入模式在检测EIT中的肺异常方面更有效.
这种新型模式为识别胸部内的异常提供了更好的灵敏度.
结果支持这种模式在EIT增强肺部成像方面的潜力.

关键词:

3D建模是什么 3D建模是什么这是EIT的EIT.有限元分析有限元分析有限元素方法的方法.

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