Stenosis parameter assessment from contrast medium tracking in cineangiography with an optical flow method

摘要

Abstract: In this paper, we present an optical flow method to infer the blood flow in arteries by tracking the contrast medium in angiography. in our approach, the velocity field is constrained to be parabolic to take into account this particular property of laminar blood flows. With this method, we get several parameters, both hemodynamic and geometric: the artery radius, the maximum velocity, the blood flow, the centerline position of the artery and other related ones. Tests of the algorithm were conducted on simulated cineangiographic images of straight and stenotic vessels and show errors ranging from 1 percent of straight vessels and up to 10 percent for short stenosis. Preliminary results with femoral arteries are also very encouraging. !9