Apparatus and method for removing scatter from an x-ray image using two- dimensional detectors and a single-energy spectrum x-ray source

摘要

An apparatus and method for removing scatter from x-ray images acquired by two-dimensional digital detectors. The apparatus consists of, in physical order, an x-ray source, a front two-dimensional x-ray detector, a beam selector, and a rear two-dimensional x-ray detector. The subject is located between the x-ray source and front detector. There two types of beam selectors, one allowing only primary x-rays to reach selected locations of the rear detector, and the other allowing primary x- rays and scatter to reach selected locations of the rear detector while allowing only scatter x-rays to reach shadowed locations of the rear detector. The method includes determining a low-resolution primary x-ray rear detector image, calculating an approximate low- resolution primary x- ray front detector image, calculating a high- resolution primary image at the front detector, and applying one or more of several correction procedures for achieving higher accuracy from the approximations.