Title:
METHOD FOR DESIGNING BILATERAL FILTERING-BASED MOTION COMPENSATION HIGH-QUALITY 4D-CBCT IMAGE RECONSTRUCTION
Document Type and Number:
WIPO Patent Application WO/2021/042807
Kind Code:
A1
Abstract:
A method for designing bilateral filtering-based motion compensation high-quality 4D-CBCT image reconstruction, comprising the following steps: 1) building a simultaneous algebraic reconstruction technique (SART)-based 3D-CBCT motion compensation reconstruction model, and reconstructing a high-quality CBCT image of a reference phase (i.e., phase 0%); 2) constructing an iterative optimization process, estimating 4D deformable vector field (4D-DVF) models between phase % and other 4D phase images, and further finding accurate 4D-DVF solutions comprising reverse sliding motion between surfaces of locomotive organs; and 3) sequentially deforming the high-quality phase 0% image according to 4D-DVF optimal solutions to obtain a final high-quality 4D-CBCT image sequence. According to the method, a high-quality 4D-CBCT image is accurately reconstructed without changing the hardware structure of an existing conventional radiotherapy linear accelerator. Therefore, the accuracy of image guided positioning before stereotactic body radiation therapy (SBRT) of lung cancers is further improved.
Inventors:
DANG JUN (CN)
ZHANG TAO (CN)
CHEN XIAOPIN (CN)
ZHANG TAO (CN)
CHEN XIAOPIN (CN)
Application Number:
PCT/CN2020/096443
Publication Date:
March 11, 2021
Filing Date:
June 17, 2020
Export Citation:
Assignee:
FIRST AFFILIATED HOSPITAL OF CHONGQING MEDICAL UNIV (CN)
International Classes:
G06T11/00
Foreign References:
| CN110570489A | 2019-12-13 | |||
| CN104361568A | 2015-02-18 | |||
| US20150221104A1 | 2015-08-06 | |||
| CN107886478A | 2018-04-06 |
Attorney, Agent or Firm:
CHONGQING XINHANG INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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