CBCT image reconstruction method based on compressed sensing

A technology of image reconstruction and compressed sensing, applied in image enhancement, image analysis, image data processing, etc., can solve the problem of increasing radiation dose to normal tissues of patients, and achieve the effect of reducing CBCT scanning time, reconstruction time, and scanning dose
CN109035360APending Publication Date: 2018-12-18WEST CHINA HOSPITAL SICHUAN UNIV
5 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WEST CHINA HOSPITAL SICHUAN UNIV
Publication Date
2018-12-18

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a CBCT image reconstruction method based on compression sensing. The CBCT data to be reconstructed are iteratively computed by using iterative algorithm. In each iteration of the iterative computation, the pre-trained dual dictionary model is used to reconstruct the image of the iterative result. The dual dictionary model includes: low-precision dictionary, high-precision dictionary; a low precision dictionary is used to sparsely express the current iterative results of the iterative computation. High-precision dictionary is used to reconstruct CBCT images using the results of low-precision dictionary sparse representation. The CBCT image reconstructed by high-precision dictionary is used as the input of the next iterative process until the acquired CBCT image reaches the predetermined accuracy, and the iterative calculation is stopped to obtain the final CBCT reconstructed image. The technical proposal provided by the invention can remarkably reduce the X-ray dose received by a patient during a single CBCT scan in image-guided radiotherapy on the premise of ensuring the clinical application of the CBCT reconstructed image, and reduce the CBCT scan time.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of image reconstruction, in particular to a CBCT image reconstruction method based on compressed sensing. Background technique

[0002] As an important means of tumor treatment, radiotherapy has entered the era of precise radiotherapy technology of "precise positioning, precise planning, and precise treatment" with the application of computer technology and the development of medical physics, fully demonstrating its ability to kill tumors to the maximum extent and improve tumor control It has the technical advantages of maximally protecting the normal organs around the tumor and reducing the incidence of serious complications. Image-guided radiotherapy (IGRT), as a technical guarantee for precise radiotherapy, collects images or other signals during the current fractionation treatment setup or treatment to guide this radiotherapy and subsequent fractionation treatments. This can be correcting patient positi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More