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A dynamic grating-based rotary intensity modulation optimization method and radiotherapy equipment

An optimization method, dynamic grating technology, applied in radiation therapy, therapy, X-ray/γ-ray/particle irradiation therapy, etc., to achieve the effect of satisfying the calculation time and the optimization effect

Active Publication Date: 2020-07-21
SUZHOU LINATECH MEDICAL SCI & TECH CO LTD
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Problems solved by technology

It can quickly solve the optimization problem of rotating intensity modulation parameters, and its optimization results can fully meet the requirements of radiotherapy planning, while making the calculation time within the range acceptable to those skilled in the art

Method used

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  • A dynamic grating-based rotary intensity modulation optimization method and radiotherapy equipment
  • A dynamic grating-based rotary intensity modulation optimization method and radiotherapy equipment
  • A dynamic grating-based rotary intensity modulation optimization method and radiotherapy equipment

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Embodiment Construction

[0081] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0082] In the process of actual radiotherapy, the doctor needs to formulate a treatment plan according to the specific conditions of the patient's illness. This treatment plan includes the angles from which the rays will be irradiated, the shape of the field of view at each angle and the irradiation time (dose control), irradiation times and so on. For example, a doctor gives the following treatment plan for a patient: two Arc rays are planned, one starts at 90 degrees and ends at 270 degrees, and the other starts at 270 degrees and ends at 90 degrees; the minimum dose of the given target area is 6000cGy, The maximum dose is 65cGy, and the dose to organs at risk does not exceed the clinical requirement. Initially, after the main frame rotates to a certain angle, it stops to complete the irradiation dose at this angle, and then rotate...

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Abstract

The invention discloses a rotation intensity-modulated optimization method based on a dynamic grating and a radiotherapy device. Compared with the prior art, the method and the device have the advantages that the advantages of rapid optimization of IMRT Sliding Window and a tumor morphological feature algorithm are combined, and the shortcomings thereof are effectively overcome; for rotating field, results based on field intensity distribution and subfield splitting are used; after dynamic conversion, a conjugate gradient method is used to optimize the subfield weight, and a perturbation technology optimizes the subfield shape; the requirement of computing time is met; and requirement of effect optimization is met.

Description

technical field [0001] The invention relates to an accelerator treatment device, in particular to a dynamic grating-based rotary intensity modulation optimization method and radiotherapy equipment. Background technique [0002] As a local treatment of tumors, radiotherapy has been constantly seeking to solve a basic problem: how to better deal with the dose relationship between tumor tissue and surrounding normal tissues, so that the tumor can be controlled locally while the surrounding normal tissues and surrounding normal tissues Radiation damage to organs is minimal. Clinical experience has proved that the local control of tumors has a certain relationship with the radiation damage of normal tissues. In most cases, the tumor control rate is directly proportional to normal tissue damage, that is, increasing the local tumor control rate will inevitably cause more damage to normal tissue. Clinical experience has also proved that by improving the irradiation technique and c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/10
CPCA61N5/10A61N5/1031A61N5/1049A61N5/1071A61N2005/1054A61N2005/1055A61N2005/1092
Inventor 姚毅
Owner SUZHOU LINATECH MEDICAL SCI & TECH CO LTD
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