US 12,131,410 B2
Edge preserving penalized reconstruction for step-and-shoot and motion compensated positron emission tomography (PET) studies
Andriy Andreyev, Willoughby Hills, OH (US); Xiyun Song, Cupertino, CA (US); and Ravindra Mohan Manjeshwar, Solon, OH (US)
Assigned to KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
Appl. No. 17/293,958
Filed by KONINKLIJKE PHILIPS N.V., Eindhoven (NL)
PCT Filed Nov. 15, 2019, PCT No. PCT/EP2019/081515
§ 371(c)(1), (2) Date May 14, 2021,
PCT Pub. No. WO2020/099649, PCT Pub. Date May 22, 2020.
Claims priority of provisional application 62/768,131, filed on Nov. 16, 2018.
Prior Publication US 2022/0012928 A1, Jan. 13, 2022
Int. Cl. G06T 11/00 (2006.01); A61B 6/03 (2006.01)
CPC G06T 11/008 (2013.01) [A61B 6/037 (2013.01); G06T 11/006 (2013.01); G06T 2211/424 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A non-transitory computer-readable medium storing instructions readable and executable by a workstation including at least one electronic processor to perform an imaging method, the method comprising:
receiving imaging data on a frame by frame basis for frames along an axial direction with neighboring frames overlapping along the axial direction wherein the frames include at least a volume (k) and a succeeding volume (k+1) at least partially overlapping the volume (k) along the axial direction; and
generating an image of the volume (k) using an iterative image reconstruction process in which an iteration of the iterative image reconstruction process includes:
computing a local penalty function for suppressing noise over the volume (k), wherein the local penalty function depends on the total coincidence counts passing through the voxel being penalized, and the value of the local penalty function is reduced in an overlap region by an amount compensating for the total coincidence counts passing through the voxel being penalized in the succeeding volume k+1; and
generating an update image of the volume (k) using imaging data from the volume (k) and further using the local penalty function.