Improving diagnostic viewing of Coronary Cine-angiogrphy through frequency filtering based frame enhancement method

Coronary angiography is an invasive medical image modality which is widely used in Interventional Cardiology to detect luminal obstructions in Coronary Arteries (CA). It has been reported that these recorded Coronary Cine-angiograms (CCA) are suffered from various visual artifacts such as noise, non...

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Bibliographic Details
Main Authors: Wajiramali, W. S., Chathurika, D. W. J., Gunasekara, D. A. N., Ranasinghe, I. A. M. S., Rathnayake, R. R. C. P., Kulathilake, K. A. S. H.
Format: Conference Proceeding
Language:English
Subjects:
angiogram enhancement
Angiography
Discrete Fourier transforms
Filtering
Homomorphic filtering
Lighting
Optical filters
optical flow
Visualization
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Summary:Coronary angiography is an invasive medical image modality which is widely used in Interventional Cardiology to detect luminal obstructions in Coronary Arteries (CA). It has been reported that these recorded Coronary Cine-angiograms (CCA) are suffered from various visual artifacts such as noise, non-uniform illumination, low contrast and epicardial motion. As a consequence of these problems, the diagnostic visualization of the CCA degrades. In this study, it has been proposed a frequency filtering based frame enhancement method for CCA to improve its diagnostic visualization. The proposed method is based on homomorphic butter worth high pass filter and empirically validated contrast stretching technique. In order to correct the epicardial deformations optical flow based frame stabilization method has been applied in later stage of the proposed method. Study results clearly emphasized the visual improvement obtained through this novel method. The resulting enhanced CCA frames produced in this study can be further used to improve the angiography image modality for quantitative stenosis assessment.
ISSN:2472-7598
DOI:10.1109/ICTER.2017.8257792