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2019年8月19日 · Optical coherence tomography (OCT) is a cross-sectional, micrometre-scale imaging modality with widespread clinical application. Typical OCT systems sacrifice lateral...

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We propose a novel framework, Object-Concept-Relation Triad (OCRT), that enables FMs to extract sparse, high-level concepts and intricate relational structures from raw visual inputs. The key idea is to bind objects in visual scenes and a set of object-centric representations through unsupervised decoupling and iterative refinement.

OCRT is a new computational 3D microscopy technique that incorporates extreme angular diversity to incoherently enhance resolution and reduce speckle of conventional OCT. OCRT registers multi-angle OCT images or volumes by solving an inverse refraction problem, a process that also computationally reconstructs a 3D refractive index map of the ...

光学相干断层扫描技术（光学相干层析技术 [2]，Optical Coherence Tomography, OCT）是近十年迅速发展起来的一种成像技术，它利用弱相干光干涉仪的基本原理，检测生物组织不同深度层面对入射弱相干光的背向反射或几次散射信号，通过扫描，可得到生物组织二维或三维结构图像。 OCT专业全称又叫光学相关断层扫描。 是最近几年应用于眼科的新型技术。 OCT是一种非接触、高分辨率层析和生物显微镜成像设备。 它可用于眼后段结构（包括视网膜、视网膜神经纤维 …

Optical coherence refraction tomography (OCRT) uses images from multiple angles to computationally reconstruct an image with isotropic resolution, solving the problem of image resolution anisotropy in the sub-millimeter imaging depth range.

在这里，我们引入光学相干折射断层扫描（OCRT），它将卓越的轴向分辨率扩展到横向维度，从通过角度多样性获取的多个传统图像合成不失真的横截面图像重建。 在校正折射引起的畸变以配准 OCT 图像时，OCRT 还实现了空间分辨折射率成像。 我们证明组织超微结构成像的横向分辨率和斑点减少提高了三倍以上，与组织学一致。 随着光学设计的进一步优化，将角度多样性纳入临床仪器，OCRT 可以作为传统 OCT 的增强功能得到广泛应用。 光学相干断层扫描（OCT）是一种 …

We have extended optical coherence refraction tomography (OCRT) to 3D by incorporating a parabolic mirror, allowing acquisition of 3D OCT volumes across two rotation axes without moving the sample.

2022年6月7日 · 杜克大学的研究人员改进了光学相干断层扫描（OCT），使用一种三维光学相干折射断层成像（3D OCRT）技术扩大了成像范围、提高了对比度和分辨率。 3D OCRT能够分辨更多细节信息，对生物医学样本成像、以及医疗诊断具有重要应用价值。 本研究目前已发表于Optica。 OCT由于不需要任何造影剂或标记物，所以广泛应用于生物医疗领域的成像，如眼、皮肤、口腔、动脉和胃肠道内部等。 研究人员表示，3D OCRT的特点是将新的硬件设备与新的三维图像重 …