US 12,141,898 B2
Continuous bed motion acquisition with axially short phantom for PET imaging system setup and quality control
Vladimir Panin, Knoxville, TN (US); Mehmet Aykac, Knoxville, TN (US); Shikui Yan, Knoxville, TN (US); and Brian Kelly, 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 Feb. 23, 2024, as Appl. No. 18/585,354.
Application 18/585,354 is a division of application No. 17/596,829, granted, now 11,961,164, previously published as PCT/US2020/070589, filed on Sep. 29, 2020.
Claims priority of provisional application 62/912,817, filed on Oct. 9, 2019.
Prior Publication US 2024/0273783 A1, Aug. 15, 2024
Int. Cl. G06T 11/00 (2006.01); A61B 6/03 (2006.01); G16H 30/40 (2018.01)
CPC G06T 11/003 (2013.01) [A61B 6/037 (2013.01); G06T 11/006 (2013.01); G16H 30/40 (2018.01)] 7 Claims
OG exemplary drawing
 
1. A method for time alignment in continuous bed motion (CBM) positron emission tomography (PET) scanner using an axially short phantom to cover long axial PET scanner's field of view, the method comprising:
(a) receiving list mode data from PET scan of the axially short phantom in CBM mode;
(b) generating CBM non-time of flight (TOF) projection data, scanner efficiency normalization array n, and attenuation factor a;
(c) reconstructing image f from the CBM non-TOF projection data, corrected for scanner efficiency by the normalization array n, and for attenuation by the attenuation factor a;
(d) modeling motion blurred non-TOF and TOF scatter S and motion blurred non-TOF and TOF projections p;
(e) for each line of response, estimating TOF center-of-mass (COM) of true coincidence distribution acquired in a stationary system of coordinates from zero order and first order moments M0 and M1 of the modeled TOF data;
(f) for each line of response, computing measured TOF COM; and
(g) determining TOF time offsets, to, by taking the difference between the measured TOF COM and the modeled TOF COM.