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Abstract

Neuroscience

集成光声、超声和血管造影断层扫描 (PAUSAT) 用于缺血性卒中的无创全脑成像

Published: June 2nd, 2023

DOI:

10.3791/65319

1Department of Biomedical Engineering, Duke University, 2Multidisciplinary Brain Protection Program, Department of Anesthesiology, Duke University School of Medicine

* These authors contributed equally

Abstract

这里介绍的是使用我们新开发的无创成像系统进行的实验性缺血性卒中研究,该系统集成了三种基于声学的成像技术:光声、超声和血管造影断层扫描 (PAUSAT)。结合这三种模式有助于获得脑血氧合的多光谱光声断层扫描 (PAT)、脑组织的高频超声成像和脑血灌注的声学血管造影。多模态成像平台可以研究中风后整个小鼠大脑的脑灌注和氧合变化。评估了两种常用的缺血性脑卒中模型:永久性大脑中动脉闭塞(pMCAO)模型和光血栓(PT)模型。PAUSAT用于对中风前后的相同小鼠大脑进行成像,并定量分析两种中风模型。该成像系统能够清楚地显示缺血性中风后的脑血管变化,包括与未受伤组织(对侧)相比,中风梗死区域(同侧)的血液灌注和氧合显着减少。激光散斑对比成像和三苯基氯化四唑(TTC)染色证实了结果。此外,两种卒中模型中的脑卒中梗死体积均通过TTC染色作为基本事实进行测量和验证。通过这项研究,我们已经证明PAUSAT可以成为缺血性中风无创和纵向临床前研究的有力工具。

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