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Optical Flow Method for Blood Flow Velocimetry Based on Digital X-Ray Subtraction Angiography: A Brief Review

Zifeng Yang

Detailed blood flow information has been recognized as the key information for diagnosis of vascular diseases, such as vascular stenosis and aneurysms. Optical flow method (OFM) is an emergent technique as a tool to analyze the digital x-ray subtraction angiographic images of blood vessels to obtain the detailed blood flow distribution in vascular systems. A brief review is constructed to discuss the status, applicability, accuracy and future direction of the optical flow technique in the physical study of vascular flow.