Method of selecting a preferred difference image
First Claim
Patent Images
1. A method of selecting one or more x-ray difference images from a group of x-ray images, which comprises the steps of:
- (a) obtaining first and second pluralities of x-ray images of a patient or subject, each x-ray image being obtained at a different time;
(b) obtaining a sample difference image representing the difference between one of the images of the first plurality of images and one of the images of the second plurality of images;
(c) selecting a region of the sample difference image, the region being less than the entire area of the sample difference image;
(d) pairing images selected from the first plurality of images with images selected from the second plurality of images;
(e) obtaining a plurality of difference images each representing the difference between the images of one of the pairs of images;
(f) searching regions of the difference images, the searched regions corresponding, respectively, to the selected region of the sample difference image; and
(g) selecting one or more difference images, the selected difference images having searched regions that satisfy a predetermined condition or index.
0 Assignments
0 Petitions
Accused Products
Abstract
In a radiographic digital subtraction system utilizing a contrast agent for enhancing a difficult-to-image anatomic region of interest, a method of selecting a superior difference image. The difference image selected represents the differential between a pair of digitized radiographic images selected from a series of such images acquired before and after the contrast appears in the region of interest during a dynamic imaging study.
-
Citations
8 Claims
-
1. A method of selecting one or more x-ray difference images from a group of x-ray images, which comprises the steps of:
-
(a) obtaining first and second pluralities of x-ray images of a patient or subject, each x-ray image being obtained at a different time; (b) obtaining a sample difference image representing the difference between one of the images of the first plurality of images and one of the images of the second plurality of images; (c) selecting a region of the sample difference image, the region being less than the entire area of the sample difference image; (d) pairing images selected from the first plurality of images with images selected from the second plurality of images; (e) obtaining a plurality of difference images each representing the difference between the images of one of the pairs of images; (f) searching regions of the difference images, the searched regions corresponding, respectively, to the selected region of the sample difference image; and (g) selecting one or more difference images, the selected difference images having searched regions that satisfy a predetermined condition or index. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification