System and method for coronary digital subtraction angiography

摘要

A method and system for extracting coronary vessels fluoroscopic image sequences using coronary digital subtraction angiography (DSA) are disclosed. A set of mask images of a coronary region is received, and a sequence of contrast images for the coronary region is received. For each contrast image, a motion estimate is calculated between each of the mask images and a background region of the contrast image and a covariance is calculated for each motion estimate. Multiple background layer predictions are generated by generating a background layer prediction for each mask image based on the calculated motion estimate and covariance. The multiple background layer estimates are combined using statistical fusion to generate a final estimated background layer. The final estimated background layer is subtracted from the contrast image to extract a coronary vessel layer for the contrast image.

主权项

1. A method for extracting coronary vessels from a contrast image, comprising:
calculating a motion field between each of a plurality of mask images and a background region of the contrast image and calculating covariances of motion vectors of each motion field; generating a plurality of background layer predictions by generating a background layer prediction from each of the plurality of mask images based on the motion field and the covariances of the motion field from each of the plurality of mask images; combining the plurality of background layer predictions using statistical fusion to generate a final estimated background layer; and extracting a coronary vessel layer from the contrast image by subtracting the final estimated background layer from the contrast image.