US 11,816,763 B2
3D scatter distribution estimation
Harshali Bal, Knoxville, TN (US); and Vladimir Panin, Knoxville, TN (US)
Assigned to Siemens Medical Solutions USA, Inc., Malvern, PA (US)
Filed by Siemens Medical Solutions USA, Inc., Malvern, PA (US)
Filed on Apr. 28, 2021, as Appl. No. 17/302,240.
Prior Publication US 2022/0351430 A1, Nov. 3, 2022
Int. Cl. G06T 11/00 (2006.01); G01T 1/29 (2006.01)
CPC G06T 11/005 (2013.01) [G01T 1/2985 (2013.01); G06T 2210/41 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system comprising:
a positron emission tomography scanner to perform a scan of an object and generate first time-of-flight (TOF) data describing true coincidences detected within direct axial planes and oblique planes during the scan; and
a processing unit to:
determine second TOF data from the first TOF data, the second TOF data describing the true coincidences detected within the direct axial planes during the scan and true coincidences detected within a subset of the oblique planes during the scan;
determine first estimated scatter based on the second TOF data;
reconstruct a first estimated image based on the first estimated scatter and the second TOF data;
determine attenuated unscattered true coincidences based on the first estimated image;
determine second estimated scatter based on the first TOF data and the attenuated unscattered true coincidences; and
reconstruct an image of the object based on the first TOF data and the second estimated scatter.