US 12,141,899 B2
Cone beam artifact correction for gated imaging
Kevin Martin Brown, Chardon, OH (US); Thomas Koehler, Norderstedt (DE); and Claas Bontus, Hamburg (DE)
Assigned to KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
Appl. No. 17/442,649
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
PCT Filed Mar. 24, 2020, PCT No. PCT/EP2020/058150
§ 371(c)(1), (2) Date Sep. 24, 2021,
PCT Pub. No. WO2020/193546, PCT Pub. Date Oct. 1, 2020.
Claims priority of provisional application 62/823,154, filed on Mar. 25, 2019.
Prior Publication US 2022/0180576 A1, Jun. 9, 2022
Int. Cl. G06T 11/00 (2006.01)
CPC G06T 11/006 (2013.01) [G06T 2210/41 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An imaging system, comprising:
a reconstructor configured to reconstruct obtained cone beam projection data with a voxel-dependent redundancy weighting such that low frequency components of the cone beam projection data are reconstructed with more redundant data than high frequency components of the cone beam projection data to produce volumetric image data, wherein the reconstructor includes a high pass filter to high pass filter the cone beam projection data and produce high frequency projection data, a low pass filter to low pass filter the cone beam projection data and produce low frequency projection data, a high frequency backprojector configured to backproject the high frequency projection data to produce high frequency volumetric image data, and a low frequency backprojector configured to backproject the low frequency projection data to produce low frequency volumetric image data; and wherein the voxel-dependent redundancy weighting includes a high frequency voxel-dependent redundancy weighting and a low frequency voxel-dependent redundancy weighting.