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Programmable scanning diffuse speckle contrast imaging of cerebral blood flow.
Akbari, Faezeh; Liu, Xuhui; Hamedi, Fatemeh; Mohtasebi, Mehrana; Chen, Lei; Yu, Guoqiang.
Afiliación
  • Akbari F; University of Kentucky, Department of Biomedical Engineering, Lexington, KY, USA.
  • Liu X; University of Kentucky, Department of Biomedical Engineering, Lexington, KY, USA.
  • Hamedi F; University of Kentucky, Department of Biomedical Engineering, Lexington, KY, USA.
  • Mohtasebi M; University of Kentucky, Department of Biomedical Engineering, Lexington, KY, USA.
  • Chen L; University of Kentucky, Spinal Cord and Brain Injury Research Center, Department of Physiology, Lexington, KY, USA.
  • Yu G; University of Kentucky, Department of Biomedical Engineering, Lexington, KY, USA.
ArXiv ; 2024 Aug 22.
Article en En | MEDLINE | ID: mdl-39253639
ABSTRACT

Significance:

Cerebral blood flow (CBF) imaging is crucial for diagnosing cerebrovascular diseases. However, existing large neuroimaging techniques with high cost, low sampling rate, and poor mobility make them unsuitable for continuous and longitudinal CBF monitoring at the bedside.

Aim:

This study aimed to develop a low-cost, portable, programmable scanning diffuse speckle contrast imaging (PS-DSCI) technology for fast, high-density, and depth-sensitive imaging of CBF in rodents.

Approach:

The PS-DSCI employed a programmable digital micromirror device (DMD) for remote line-shape laser (785 nm) scanning on tissue surface and synchronized a 2D camera for capturing boundary diffuse laser speckle contrasts. New algorithms were developed to address deformations of line-shape scanning, thus minimizing CBF reconstruction artifacts. The PS-DSCI was examined in head-simulating phantoms and adult mice.

Results:

The PS-DSCI enables resolving Intralipid particle flow contrasts at different tissue depths. In vivo experiments in adult mice demonstrated the capability of PS-DSCI to image global/regional CBF variations induced by 8% CO2 inhalation and transient carotid artery ligations.

Conclusions:

Compared to conventional point scanning, the line scanning in PS-DSCI significantly increases spatiotemporal resolution. The high sampling rate of PS-DSCI is crucial for capturing rapid CBF changes while high spatial resolution is important for visualizing brain vasculature.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ArXiv Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ArXiv Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos