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Particle beam irradiation device and particle beam therapy device

A particle beam and irradiation device technology, applied in the field of particle beam irradiation devices and particle beam therapy devices, can solve problems such as inability to irradiate the affected part, and achieve the effect of eliminating the influence of magnetic hysteresis and high-precision beam irradiation

Active Publication Date: 2018-04-27
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the invention disclosed in Patent Document 1, there is a problem that the affected part cannot be accurately irradiated due to the influence of the hysteresis of the electromagnet.

Method used

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  • Particle beam irradiation device and particle beam therapy device
  • Particle beam irradiation device and particle beam therapy device
  • Particle beam irradiation device and particle beam therapy device

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0084] figure 1 It is a schematic configuration diagram of the particle beam therapy apparatus in Embodiment 1 of the present invention. The particle beam therapy device includes: a beam generation device 51 ; an accelerator 52 ; a beam delivery device 53 ; a particle beam irradiation device 54 ; a treatment planning device 55 ; In addition, the treatment planning device 55 may not be regarded as a component part of the particle beam therapy device, and the device may be prepared independently. The beam generator 51 accelerates charged particles generated in the ion source to generate a charged particle beam. The accelerator 52 is connected with the beam generator 51 to accelerate the generated charged particle beam. The beam transport device 53 transports the charged particle beam that is accelerated to the energy set in the accelerator 52 and then emitted. The particle beam irradiation device 54 is provided downstream of the beam transport device 53 , and irradiates the i...

Embodiment approach 2

[0147] In Embodiment 1, the charged particle beam is irradiated in the learning irradiation of the main irradiation, but it is also possible to perform learning without irradiating the charged particle beam and optimize the command current I k =(Ix k ,Iy k ). Described below. In the particle beam therapy apparatus according to Embodiment 2, two types of pre-scan scoring methods (the third scoring method and the fourth scoring method) can be used as the pre-scan scoring method for learning irradiation. The third scoring method is to compare the time series data with the measured magnetic field at each sampling period when the pre-scan is actually performed a B k ( a Bx k , a By k ) (a is the number of learning times), and consider the following evaluation function, the above time series data is based on the irradiation position P of each sampling period k (X k , Y k ) (subscript k is the serial number) the estimated value B of the magnetic field corresponding est i....

Embodiment approach 3

[0159] The so-called learning function can be interpreted as "the function of obtaining a solution close to a more ideal one for a problem". In Embodiments 1 and 2, for generating command current I k =(Ix k ,Iy k ) function is described, the above command current I k =(Ix k ,Iy k ) is a current to achieve more ideal irradiation for the problem of how to make the actual irradiation close to one treatment plan data generated by the treatment planning device 55 for each patient.

[0160]In control engineering, the so-called more advanced learning function (or more intelligent learning function) can be interpreted as "the function used to derive a more ideal solution to future unknown problems based on the accumulation of past experience". Therefore, in Embodiment 3, a particle beam irradiation apparatus and a particle beam therapy apparatus having a more advanced learning function to which the learning function described in Embodiments 1 and 2 are further applied will be des...

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Abstract

The invention relates to a particle ray irradiation device which aims at eliminating hysteresis lag influences of a scanning electromagnet, and achieving high-accuracy beam irradiation in raster scanning and mixing scanning. The particle ray irradiation device comprises a scanning power source (4) and an irradiation control device (5), the scanning power source (4) outputs an exciting current of the scanning electromagnet (3), the irradiation control device (5) controls the scanning power source (4) and comprises a scanning electromagnet command value learning generator (37), the scanning electromagnet command value learning generator (37) evaluates a pre-scanning result, an command value (Ik) of the exciting current is updated to execute pre-scanning under the condition that the evaluation result does not meet the specific conditions,, the exciting current command value (Ik) with the evaluated result meeting the specific conditions is output to the scanning power source (4), and pre-scanning is a series of irradiation motions based on the command value (Ik) of the exciting current output by the scanning power source (4).

Description

[0001] This application is a branch of an invention patent application titled "Particle Beam Irradiation Device and Particle Beam Therapy Device", with an international filing date of March 31, 2010, and application number 201080060087.1 (international application number is PCT / JP2010 / 055863). case application. technical field [0002] The present invention relates to a particle beam therapy device used for medical purposes or research purposes, and more particularly to a so-called raster scanning scanning type particle beam irradiation device and particle beam therapy device. Background technique [0003] Generally speaking, a particle beam therapy device includes: a beam generating device, which generates a charged particle beam; an accelerator, which is connected to the beam generating device, and accelerates the generated charged particle beam; a conveying system that conveys a charged particle beam that is emitted after being accelerated to an energy set in the accelera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/10
Inventor 岩田高明
Owner HITACHI LTD
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