Real-time in vivo computed optical interferometric tomography.

Real-time in vivo computed optical interferometric tomography.
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DOI:
10.1038/nphoton.2013.71
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发表时间:
2013-06-01
期刊:
影响因子:
35
通讯作者:
--
中科院分区:
物理与天体物理1区
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散射组织的高分辨率实时层析成像对于医学和生物学的许多领域都是重要的。然而,横向分辨率和景深之间的妥协,除了在组织深处的低灵敏度继续阻碍细胞级体积断层摄影的进展。计算机成像有可能解决这些长期存在的局限性。干涉合成孔径显微镜(ISAM)是一种计算机成像技术,能够实现具有空间不变分辨率的高分辨率体积断层扫描。然而,其临床诊断的潜力在很大程度上仍未开发,因为全体积重建需要漫长的后处理,并且相稳定性要求在体内难以满足。在这里,我们演示了如何3-D傅里叶域resspection,结合高速光学相干断层扫描(OCT),可以实现高分辨率的体内断层扫描。在真实的时间上扩展了一个数量级以上的景深,实现了增强的深度灵敏度。这项工作奠定了高速体积细胞级层析成像的基础。
High-resolution real-time tomography of scattering tissues is important for many areas of medicine and biology. However, the compromise between transverse resolution and depth-of-field in addition to low sensitivity deep in tissue continue to impede progress towards cellular-level volumetric tomography. Computed imaging has the potential to solve these long-standing limitations. Interferometric synthetic aperture microscopy (ISAM) is a computed imaging technique enabling high-resolution volumetric tomography with spatially invariant resolution. However, its potential for clinical diagnostics remains largely untapped since full volume reconstructions required lengthy postprocessing, and the phase-stability requirements have been difficult to satisfy in vivo. Here we demonstrate how 3-D Fourier-domain resampling, in combination with high-speed optical coherence tomography (OCT), can achieve high-resolution in vivo tomography. Enhanced depth sensitivity was achieved over a depth-of-field extended in real time by more than an order of magnitude. This work lays the foundation for high-speed volumetric cellular-level tomography.
使用高速 OCT 对人体皮肤病变进行原位结构和微血管造影评估。
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