Stent Fitting using Cylindrical Affine Transformation Model for Pulmonary Artery

Abstract

The stents are becoming widely used as percutaneous interventions of pulmonary artery are progressively replacing conventional open heart surgeries. Presently, X-ray images of pulmonary artery i.e. angiograms are visually inspected by physician to determine the proper stent size. The size estimation of stent done preoperative which has not been assessed so far, is studied in this paper. A reliable method to determine the size of stent using a deformation model before performing angioplasty is proposed. A cylindrical affine transformation model is used to predict the expected deformation of the stent to fit it as closely as possible into artery. The method was evaluated on artery data set of 5 cases in which the patient was suffering from stenosis of pulmonary artery to obtain satisfactory results.