US 12,102,466 B2
Pet imaging using multiple organ specific short CT scans
Girish Bal, Knoxville, TN (US); and Frank Kehren, Knoxville, TN (US)
Assigned to Siemens Medical Solutions USA, Inc., Malvern, PA (US)
Appl. No. 17/753,313
Filed by Siemens Medical Solutions USA, Inc., Malvern, PA (US)
PCT Filed Jan. 28, 2020, PCT No. PCT/US2020/015399
§ 371(c)(1), (2) Date Feb. 28, 2022,
PCT Pub. No. WO2021/154213, PCT Pub. Date Aug. 5, 2021.
Prior Publication US 2022/0296194 A1, Sep. 22, 2022
Int. Cl. G06K 9/00 (2022.01); A61B 6/00 (2006.01); A61B 6/03 (2006.01); G06T 11/00 (2006.01)
CPC A61B 6/5235 (2013.01) [A61B 6/032 (2013.01); A61B 6/037 (2013.01); A61B 6/5258 (2013.01); G06T 11/006 (2013.01); G06T 2211/432 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method comprising the steps of:
(a) performing a full axial field of view (FOV) PET scan of a patient and generating a PET data;
(b) performing a truncated FOV CT scan of a volume of interest (VOI) in the patient's body;
(c) generating a truncated mu-map covering the truncated FOV of the CT scan, wherein the truncated FOV of the CT scan is shorter than the full axial FOV of the PET scan;
(d) generating a truncated PET data that corresponds to the truncated mu-map and reconstructing a PET image of the VOI using the truncated PET data;
(e) generating a mu-map for full axial FOV of the PET scan by extending the truncated mu-map generated from the truncated FOV CT scan by estimating the missing mu-map data using the PET data; and
(f) reconstructing a PET image using the mu-map for full axial FOV of the PET scan by allocating different weights to the information content from the different regions in the mu-map.