US 11,717,241 B2
3D-beam modulation filter for equalizing dose and image quality in breast CT
John M. Boone, Fair Oaks, CA (US); Andrew M. Hernandez, Nevada City, CA (US); and Peymon Gazi, Berkeley, CA (US)
Assigned to The Regents of the University of California, Oakland, CA (US)
Filed by The Regents of the University of California, Oakland, CA (US)
Filed on Jun. 23, 2021, as Appl. No. 17/356,249.
Application 17/356,249 is a continuation of application No. 15/779,342, granted, now 11,076,821, previously published as PCT/US2016/063701, filed on Nov. 23, 2016.
Claims priority of provisional application 62/260,169, filed on Nov. 25, 2015.
Prior Publication US 2021/0393220 A1, Dec. 23, 2021
Int. Cl. A61B 6/00 (2006.01); A61B 6/03 (2006.01); A61B 6/04 (2006.01); G21K 1/10 (2006.01)
CPC A61B 6/4085 (2013.01) [A61B 6/032 (2013.01); A61B 6/0435 (2013.01); A61B 6/405 (2013.01); A61B 6/4035 (2013.01); A61B 6/4078 (2013.01); A61B 6/502 (2013.01); A61B 6/5205 (2013.01); A61B 6/544 (2013.01); A61B 6/582 (2013.01); A61B 6/583 (2013.01); A61B 6/5258 (2013.01); A61B 6/5294 (2013.01); G21K 1/10 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for producing three-dimensional (3D) beam modulation filters for performing cone beam computed tomography (CBCT) breast imaging, comprising:
receiving a plurality of CBCT datasets acquired using a CBCT system from a plurality of persons with different breast shapes and sizes;
selecting a subset of the CBCT datasets to define a breast class, said breast class having a breast class x-ray path length profile; and
fabricating, using the breast class x-ray path length profile, a three-dimensional (3D) beam modulation filter to have a thickness profile that compensates for intensity variations of a measured signal at a detector when a person's breast within said breast class is imaged by a cone beam of the CBCT system,
wherein the cone beam comprises a first beam angle direction and a second beam angle direction, wherein the first beam angle direction is perpendicular to the second beam angle direction, wherein the thickness profile varies as a function of position in both the first beam angle direction and the second beam angle direction.