Title:
CT BEAM HARDENING CORRECTION METHOD, CT BEAM HARDENING CORRECTION DEVICE, AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2023/272929
Kind Code:
A1
Abstract:
Disclosed are a CT beam hardening correction method, a CT beam hardening correction device, and a storage medium. The CT beam hardening correction method includes: scanning a phantom to obtain measured projection data of the phantom; calculating estimated theoretical projection data of the phantom based on an initial estimated position of the phantom by using a theoretical projection data calculation model; calculating an actual position of the phantom based on the measured projection data and the estimated theoretical projection data of the phantom; calculating actual theoretical projection data of the phantom by using the theoretical projection data calculation model according to the actual position; calculating a beam hardening correction factor according to a relationship among expected projection data of a scanned object, measured projection data of the scanned object, and a beam hardening correction factor, the actual theoretical projection data of the phantom, and measured projection data of the phantom; and calculating corrected projection data of a measured object according to the calculated beam hardening correction factor, measured projection data of the measured object, corrected projection data of the measured object, and the relationship.
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Inventors:
ZHANG GUO QING (CN)
WANG YANG (CN)
ZHOU WEI (CN)
CHEN WEN HAO (CN)
WANG YANG (CN)
ZHOU WEI (CN)
CHEN WEN HAO (CN)
Application Number:
PCT/CN2021/116208
Publication Date:
January 05, 2023
Filing Date:
September 02, 2021
Export Citation:
Assignee:
SIEMENS SHANGHAI MED EQUIP LTD (CN)
International Classes:
A61B6/00
Foreign References:
| US20140321608A1 | 2014-10-30 |
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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