US 11,670,017 B2
Systems and methods for reprojection and backprojection via homographic resampling transform
Cyril Riddell, Issy-les-Moulineaux (FR); Marion Savanier, Versailles (FR); Emilie Chouzenoux, Paris (FR); and Jean-Christophe Pesquet, Romainvilliers (FR)
Assigned to GE Precision Healthcare LLC, Milwaukee, WI (US)
Filed by GE Precision Healthcare LLC, Milwaukee, WI (US)
Filed on Jul. 31, 2020, as Appl. No. 16/945,539.
Prior Publication US 2022/0036605 A1, Feb. 3, 2022
Int. Cl. G01T 1/00 (2006.01); A61B 6/00 (2006.01); G06T 11/00 (2006.01); A61B 6/03 (2006.01)
CPC G06T 11/005 (2013.01) [A61B 6/032 (2013.01); A61B 6/4208 (2013.01); A61B 6/5217 (2013.01); G06T 11/006 (2013.01); G06T 2210/41 (2013.01); G06T 2211/424 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method, comprising:
acquiring imaging data corresponding to a plurality of divergent X-rays;
assigning a single functional form to the plurality of divergent X-rays;
determining, via a homographic transform, weights of interaction between a plurality of distribution samples and a plurality of X-ray detector bins based on the single functional form;
reconstructing an image based on the weights of interaction; and
sampling the single functional form to obtain a desired level of precision, wherein a set of basis functions are selected for a set of homographic transforms based on the desired level of precision, and wherein a size of the set of basis functions is increased to correspondingly increase the level of precision.