[논문]High-speed optical coherence tomography angiography for the measurement of stimulus-induced retrograde vasodilation of cerebral pial arteries in awake mice

Shin, Paul; Yoon, Jin-Hui; Jeong, Yong; Oh, Wang-Yuhl

doi:10.1117/1.NPh.7.3.030502

[해외논문] High-speed optical coherence tomography angiography for the measurement of stimulus-induced retrograde vasodilation of cerebral pial arteries in awake mice 원문보기

Neurophotonics, v.7 no.3, 2020년, pp.030502 -

Shin, Paul (Korea Advanced Institute of Science and Technology, Department of Mechanical Engineering , Daejeon, Republic of Korea) , Yoon, Jin-Hui (Korea Advanced Institute of Science and Technology , KI for Health Science and Technology, Daejeon, Republic of Korea) , Jeong, Yong (Korea Advanced Institute of Science and Technology , KI for Health Science and Technology, Daejeon, Republic of Korea) , Oh, Wang-Yuhl (Korea Advanced Institute of Science and Technology, Department of Mechanical Engineering , Daejeon, Republic of Korea)

Abstract ▼ AI-Helper

Abstract.Significance: Having a clear understanding of functional hyperemia is crucial for functional brain imaging and neurological disease research. Vasodilation induced by sensory stimulus propagates from the arterioles to the upstream pial arteries in a retrograde fashion. As retrograde vasodilation occurs briefly in the early stage of functional hyperemia, an imaging technique with a high temporal resolution is required for its measurement.Aim: We aimed to present an imaging method to measure stimulus-induced retrograde vasodilation in awake animals.Approach: An imaging method based on optical coherence tomography angiography, which enables a high-speed and label-free vessel diameter measurement, was developed and applied for the investigation.Results: The propagation speed of retrograde vasodilation of pial artery was measured in awake mice. Other characteristics of functional hyperemia such as temporal profile and amplitude of the vascular response were also investigated.Conclusions: Our results provide detailed information of stimulus-induced hemodynamic response in the brain of awake mice and suggest the potential utility of our imaging method for the study of functional hyperemia in normal and diseased brain.

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