Noninvasive label-free imaging of microhemodynamics by optical-resolution photoacoustic microscopy.

Noninvasive label-free imaging of microhemodynamics by optical-resolution photoacoustic microscopy.
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DOI:
10.1364/oe.17.007688
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发表时间:
2009-04-27
期刊:
影响因子:
3.8
通讯作者:
Wang LV
Wang LV
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Hu S;Maslov K;Wang LV

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体内微循环成像有助于对许多重大疾病的基本了解。然而,现有技术通常需要侵入性程序或外源性造影剂,这扰乱了微循环的内在生理学。在这里,我们报告光学分辨率光声显微镜(OR-PAM)的非侵入性无标记微循环成像在细胞水平。OR-PAM首次展示了在单个微血管中直至毛细血管的血红蛋白浓度和氧合的定量。使用这种技术,我们成像几个重要的,但难以捉摸的微血流动力学活动,包括血管舒缩和血管舒张,在小动物体内。OR-PAM能够对完整的微循环进行功能性体积成像,从而为广泛的生物学和临床应用提供大大提高的准确性和多功能性。
In vivo microcirculatory imaging facilitates the fundamental understanding of many major diseases. However, existing techniques generally require invasive procedures or exogenous contrast agents, which perturb the intrinsic physiology of the microcirculation. Here, we report on optical-resolution photoacoustic microscopy (OR-PAM) for noninvasive label-free microcirculatory imaging at cellular levels. For the first time, OR-PAM demonstrates quantification of hemoglobin concentration and oxygenation in single microvessels down to capillaries. Using this technique, we imaged several important yet elusive microhemodynamic activities—including vasomotion and vasodilation—in small animals in vivo. OR-PAM enables functional volumetric imaging of the intact microcirculation, thereby providing greatly improved accuracy and versatility for broad biological and clinical applications.
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