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Intra-slice motion correction of intravascular OCT images using deep features
摘要： Intra-slice motion correction is an important step for analyzing volume variations and pathological formations from intravascular imaging. Optical Coherence Tomography (OCT) has been recently introduced for intravascular imaging and assessment of coronary artery disease. 2D cross-sectional OCT images of coronary arteries play a crucial role to characterize the internal structure of the tissues. Adjacent images could be compounded, however they might not fully match due to motion, which is a major hurdle for analyzing longitudinally each tissue in 3D. The aim of this study is to develop a robust tissue matching based motion correction approach from a sequence of 2D intracoronary OCT images. Our motion correction technique is based on the correlation between deep features obtained from Convolutional Neural Network (CNN) for each frame of a sequence. The optimal transformation of each frame is obtained by maximizing the similarity between the tissues of reference and moving frames. The results show a good alignment of the tissues after applying CNN features and determining the transformation parameters.
关键词： Deep Features,Optical Coherence Tomography (OCT),Coronary Artery,Motion Correction,Tissue Characterization
更新于2025-09-23 15:21:01
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Ground-state cooling of mechanical oscillator via quadratic optomechanical coupling with two coupled optical cavities
摘要： A small pilot study was performed to assess feasibility of shearwave elastography during treatment process. Results: The Histogram Width Tissue Characterization (HWTC) between 35 and 50 year age group shows significant difference between the epidermal and subcutaneous fat tissue characterization. The epidermis layer of 50 year old female has less gray scale levels with reduced HWTC rate. Conclusion: Further research is encouraged to include large sample populations. Following collagen filler treatment or other aesthetic methods, follow up sonography and elastography methods may prove to provide a measurable outcome in treatment.
关键词： sonography,elastography,tissue characterization,shearwave elastography
更新于2025-09-12 10:27:22