Patent ID: 11879856
Assignee: CANON MEDICAL SYSTEMS CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  A | IPC A  G

Claim 0:
1. A method for calibrating a response of a photon counting detector (PCD) for material decomposition in a photon counting computed tomography (CT) system, the method comprising:
(1) at each pixel of the PCD, performing a plurality of low flux scans comprising phantom scans to obtain counts for each of a plurality of energy bins;
(2) estimating first parameters, which are dependent on energy, based on the counts;
(3) estimating second parameters which are dependent on total counts of all energy bins, based on the first parameters; and
(4) performing a material decomposition in object/patient scans to estimate the basis material based on the first parameters and the second parameters.