US 11,986,337 B2
Dose reduction for cardiac computed tomography
Francisco Contijoch, La Jolla, CA (US); Brendan Colvert, La Jolla, CA (US); and Elliot McVeigh, La Jolla, CA (US)
Filed by The Regents of the University of California, Oakland, CA (US)
Filed on Jul. 14, 2021, as Appl. No. 17/375,895.
Claims priority of provisional application 63/219,337, filed on Jul. 7, 2021.
Claims priority of provisional application 63/051,782, filed on Jul. 14, 2020.
Prior Publication US 2022/0022836 A1, Jan. 27, 2022
Int. Cl. A61B 6/00 (2006.01); A61B 6/03 (2006.01); A61B 6/40 (2024.01); A61B 6/50 (2024.01); G16H 10/60 (2018.01); G16H 20/40 (2018.01); H05G 1/30 (2006.01)
CPC A61B 6/542 (2013.01) [A61B 6/032 (2013.01); A61B 6/4035 (2013.01); A61B 6/503 (2013.01); G16H 10/60 (2018.01); G16H 20/40 (2018.01); H05G 1/30 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of reducing radiation dose in computed tomography (CT) imaging, comprising:
positioning a region of interest of an imaging target proximate to an isocenter of a CT scanner; and
adjusting a fluence of X-ray radiation produced by an X-ray source of the CT scanner using a beam-shaping filter,
wherein the beam-shaping filter is disposed between the X-ray source of the CT scanner and the region of interest, and
wherein the beam-shaping filter is configured to attenuate the X-ray radiation on areas of the imaging target located outside of the region of interest and simultaneously transmit the X-ray radiation to the areas of the imaging target located outside of the region of interest to provide a fluence of the X-ray radiation on the areas of the imaging target located outside of the region of interest at a level less than a predetermined fraction of a fluence of the X-ray radiation within the region of interest, and
wherein the beam-shaping filter has a first part including a first material and a second part including a second material different from the first material.