US 12,131,409 B2
Calibration method for a spectral computerized tomography system
Edward Steven Jimenez, Jr., Albuquerque, NM (US); Srivathsan Prabu Koundinyan, Bordentown, NJ (US); Isabel Gallegos, Albuquerque, NM (US); Adriana Stohn, Chandler, AZ (US); and Gabriella Dalton, Albuquerque, NM (US)
Assigned to National Technology & Engineering Solutions of Sandia, LLC, Albuquerque, NM (US)
Filed by National Technology & Engineering Solutions of Sandia, LLC, Albuquerque, NM (US)
Filed on Dec. 16, 2021, as Appl. No. 17/553,221.
Application 17/553,221 is a division of application No. 16/725,549, filed on Dec. 23, 2019, granted, now 11,263,792.
Prior Publication US 2022/0122300 A1, Apr. 21, 2022
Int. Cl. A61B 6/03 (2006.01); A61B 6/40 (2024.01); A61B 6/58 (2024.01); G01N 23/046 (2018.01); G06T 11/00 (2006.01)
CPC G06T 11/005 (2013.01) [A61B 6/032 (2013.01); A61B 6/4085 (2013.01); A61B 6/586 (2013.01); G01N 23/046 (2013.01); G06T 11/006 (2013.01); G06T 2207/10081 (2013.01); G06T 2211/424 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of tomographic image reconstruction, comprising:
providing projection data generated from an x-ray computerized tomography system as input to an iterative image reconstruction algorithm resident on a digital processing device; and
running the algorithm, wherein:
the projection data are a product of an x-ray tomographic projection system of the tomography system having a field of view (FOV);
the running of the algorithm comprises retrieving a priori system information (APSI) from a computer-accessible storage medium and utilizing the retrieved APSI;
the APSI comprises point spread functions (PSFs) of all voxels in a voxelization of the field of view;
each retrieved PSF is retrieved in the form of a vector of parameters; and
the utilizing of the APSI comprises decompressing each retrieved vector of parameters so as to generate a discretized point spread function to form a tomographic image reconstruction of the projection data generated from the x-ray computerized tomography system.