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Obtaining an energy spectrum of a focused ion beam technical field

A technology of focusing ion beams and ion beams, applied in X-ray/γ-ray/particle irradiation therapy, radiotherapy, discharge tube, etc., can solve the problems of modeling delivery deviation from the total delivery dose, limited lateral range, non-representation, etc.

Active Publication Date: 2021-05-21
RAYSEARCH LAB
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the limited lateral extent of the Bragg cell, a portion of the dose delivered by a single spot may be lost in the measurement, with the result that the measured IDD does not represent the complete IDD
If this difference is not accounted for, the modeled delivery may deviate significantly from the total delivered dose

Method used

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  • Obtaining an energy spectrum of a focused ion beam technical field
  • Obtaining an energy spectrum of a focused ion beam technical field
  • Obtaining an energy spectrum of a focused ion beam technical field

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Embodiment Construction

[0030] Aspects of the present disclosure now will be described more fully hereinafter with reference to the accompanying drawings, in which certain embodiments of the invention are shown. These aspects may, however, be embodied in many different forms and should not be construed as limiting; rather, these embodiments are provided by way of illustration so that this disclosure will be thorough and complete and incorporate all aspects of the invention The scope fully conveys to those skilled in the art. Throughout the specification, like numerals refer to like elements.

[0031] figure 1 is a schematic diagram illustrating an environment in which embodiments presented herein may be applied. The treatment planning system 1 determines how to deliver a radiation dose to a target volume 3 of a patient. More specifically, the treatment planning system 1 provides a treatment plan 7 to the ion beam therapy delivery system 2 . The treatment plan 7 specifies weights for the plurality...

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Abstract

The invention relates to obtaining an energy spectrum of a focused ion beam technical field. It is provided a method for obtaining an energy spectrum of a focused ion beam when a Bragg peak chamber is used to measure an integrated depth dose, IDD. The method comprises the steps of: simulating doses of a set of nominally mono energetic focused ion beams; determining a lateral extension of a Bragg peak chamber to evaluate; calculating a set of theoretic component IDD curves, CIDDs, by laterally integrating the dose of the simulated set of the nominally mono energetic focused ion beams, over the lateral extension of the Bragg peak chamber; storing calculated CIDDs; obtaining a measured IDD of a focused ion beam with a nominal energy using the Bragg peak chamber; and performing a fit of a linear combination of CIDDs to the measured IDD, to determine an energy spectrum for the focused ion beam with the nominal beam energy.

Description

technical field [0001] The present disclosure relates to the field of radiation therapy, and in particular to generating a radiation therapy plan while being restricted to a subset of fluence elements. Background technique [0002] In ion beam therapy, a beam of ions (eg, protons or heavy ions, such as carbon ions) is directed at a target volume. A target volume may eg represent a cancerous tumor. The ions penetrate tissue and deliver a dose of energy to destroy cancer cells. One advantage of ion beam therapy is the pronounced peak in the dose distribution, known as the Bragg peak. The Bragg peak is the peak of dose delivery that occurs at a certain depth, after which dose delivery drops off rapidly. It can be compared to electron beam therapy or X-ray therapy, where the peak occurs very close to entering the tissue, and the dose drop cannot be controlled with the same steep drop-off as ion therapy. [0003] The depth of the Bragg peak in a patient can be controlled by a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10
CPCA61N5/1065A61N5/1071A61N2005/1087A61N2005/1088A61N5/103H01J37/05H01J37/304
Inventor 马丁·扬松
Owner RAYSEARCH LAB
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