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The aim of this study is to automatically detect the boundary of vessel walls in optical coherence tomography (OCT) sequences. We developed a new method to eliminate guide-wire shadow artifacts and accurately estimate the vessel wall. The estimation of the position of the guide-wire is the key concept for the elimination of guide-wire shadow artifacts. After identification of the artifacts we propose...
Optical Coherence Tomography (OCT) is a recent modality, which measures the intensity of back-reflected infrared light. The main advantage of OCT is its high resolution at the cost of a decreased penetration depth. OCT can differentiate between typical constituents of atherosclerotic plaques, such as lipid, calcium, and fibrous tissue better than intravascular ultrasound as shown by recent studies,...
Choroidal Neo-Vascularization (CNV) is a form of Age related Macular Degeneration (AMD) which leads to severe central vision loss. Therefore, it is needed to analyze the alterations that occur during CNV by quantification of the changing parameters. In CNV, the Retinal Pigment Epithelium (RPE) layer undergoes many changes and could be recorded by Optical Coherence Tomography (OCT). The highly reflective...
The aim of this study is to interactively assess reendothelialization of stents at an accuracy of down to a few micrometer by analyzing endovascular optical coherence tomography (OCT) sequences. Vessel wall and stent struts are automatically detected by using morphological, gradient, and symmetry operators coupled with active contour models; alerts are issued to ask for user supervision over some...
Optical coherence tomography (OCT) is a rapidly emerging imaging modality that can non-invasively provide cross-sectional, high-resolution images of tissue morphology in situ and in real-time. Previous studies have demonstrated that OCT is capable of accurately visualizing the pathological changes in the living kidney in vivo using the Munich-Wistar rat model. In this work, we establish, for the first...
We report a method for improving the accuracy in determining blood flow rate and small vessel size by implementing a delay line filter when processing real-time spectral domain optical coherence tomography images of flow.
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