Rotating intensity modulated optimization method based on dynamic grating and radiotherapy equipment

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

Active Publication Date: 2018-06-29
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

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  • Rotating intensity modulated optimization method based on dynamic grating and radiotherapy equipment
  • Rotating intensity modulated optimization method based on dynamic grating and radiotherapy equipment
  • Rotating intensity modulated optimization method based on dynamic grating and radiotherapy equipment

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Embodiment Construction

[0105] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0106] In the process of actual radiotherapy, the doctor needs to formulate a treatment plan according to the specific conditions of the patient's disease. This treatment plan includes the angles from which the rays will be irradiated, the shape of the field of each angle and the irradiation time (dose control), the 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 rotates to...

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Abstract

The invention discloses a rotating intensity modulated optimization method based on dynamic grating and radiotherapy equipment. In comparison with the prior art, the optimization method and the radiotherapy equipment provided by the invention have the advantages that advantages of IMRT Sliding Window rapid optimization and tumor morphology characteristic algorithm are combined, and disadvantages of the two means are effectively overcome. Treatment efficiency of Conformal type Arc is used, and meanwhile, dosage contribution of the Conformal Arc to an overall plane is taken into full consideration in an optimizing process; the entire plan is optimized; a result obtained from radiation field intensity distribution and sub-field division is converted into a dynamic result; and finally, a sub-field weight is optimized through a conjugate gradient method. Therefore, a requirement on computation time can be satisfied, and meanwhile, a requirement on optimization result can be satisfied; and at the same time, a radiation field utilization rate is greatly improved.

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 Applications(China)
IPC IPC(8): A61N5/10
CPCA61N5/103A61N5/1047
Inventor 姚毅
Owner SUZHOU LINATECH MEDICAL SCI & TECH CO LTD
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