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Patent Searching and Data


Title:
METHOD AND DEVICE FOR IMPLEMENTING SUBFIELD OPTIMIZATION-BASED ORTHOGONAL DOUBLE-LAYER GRATING ROTATION INTENSITY MODULATION
Document Type and Number:
WIPO Patent Application WO/2020/248489
Kind Code:
A1
Abstract:
Provided are a method and a device for implementing subfield optimization-based orthogonal double-layer grating rotation intensity modulation, relating to the technical field of medical treatment. The method comprises: discretizing a rotating arc into multiple equally spaced fields; calculating a field intensity matrix by using a conjugate gradient method; calculating subfields of each field through a double-layer grating static segmentation algorithm so as to obtain the first predetermined number of subfields with the largest contribution for each field; selecting two subfields with similar shapes from the first predetermined number of subfields with the largest contribution, and distributing them to the rotating arc, and performing interpolation to obtain discrete subfields; calculating a deposition matrix; iteratively calculating the shape and weight of the subfields; and calculating the intensity modulation dose distribution by using a Monte Carlo dose algorithm. By applying the conjugate gradient method to the field intensity matrix calculation and iteratively calculating the shape and weight of each discrete subfield, the optimization calculation process is prevented from falling into a local optimal solution, the planned quality is ensured, and the treatment efficiency is improved.

Inventors:
WEN HU ER (CN)
JU YAO (CN)
YAO JONATHAN YI (CN)
Application Number:
PCT/CN2019/117278
Publication Date:
December 17, 2020
Filing Date:
November 12, 2019
Export Citation:
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Assignee:
SUZHOU LINATECH MEDICAL SCIENCE AND TECH (CN)
International Classes:
A61N5/10
Foreign References:
CN110215623A2019-09-10
CN108175953A2018-06-19
CN104318122A2015-01-28
CN105709341A2016-06-29
CN105031820A2015-11-11
US6907282B22005-06-14
Attorney, Agent or Firm:
SUZHOU HUABO INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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