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Apparatus for determining a number of beams in IMRT

A quantitative and unit-determining technology, applied in radiation therapy, X-ray/γ-ray/particle irradiation therapy, treatment, etc., can solve problems such as non-optimal treatment planning

Inactive Publication Date: 2015-10-07
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, only a rough estimate of the number of beams is provided, which may still lead to non-optimal treatment planning

Method used

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  • Apparatus for determining a number of beams in IMRT
  • Apparatus for determining a number of beams in IMRT
  • Apparatus for determining a number of beams in IMRT

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Experimental program
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Embodiment Construction

[0043] figure 1 An embodiment of an IMRT system for performing an IMRT procedure is shown schematically and exemplarily. The IMRT system 1 comprises: means 4 for determining the number of beams to be used during the IMRT procedure; a treatment plan determination unit 5 for determining a treatment plan for the IMRT procedure based on the determined number of beams; and IMRT applying device 6, used for applying IMRT according to the determined treatment plan.

[0044] The device 4 comprises an objective function providing unit 13 for providing an objective function of the IMRT procedure, wherein said objective function depends, inter alia, on a target dose to be applied during IMRT. The device 4 further comprises a sensitivity determination unit 14 for determining the sensitivity of the objective function with respect to changes in the target dose, and a beam number determination unit 15 for determining the beam number from the determined sensitivity.

[0045] The objective fu...

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Abstract

The invention relates to an apparatus for determining a number of beams in IMRT. An objective function providing unit (13) provides an objective function of an IMRT procedure, wherein the objective function depends on a target dose to be applied during the IMRT procedure. A sensitivity determination unit (14) determines the sensitivity of the objective function with respect to changes of the target dose, and a beam number determination unit (15) determines the number of beams depending on the determined sensitivity. It has been found that the sensitivity of the objective function with respect to changes of the target dose is an accurate measure for reliably determining an optimized number of beams in IMRT, which allows for generating a high quality treatment plan and which in turn leads to an improved IMRT procedure.

Description

technical field [0001] The present invention relates to a device, a method and a computer program for determining the number of beams in intensity modulated radiation therapy (IMRT). The invention also relates to an IMRT system, an IMRT method and an IMRT computer program for performing said IMRT. Background technique [0002] During an IMRT procedure, a planned target volume (PTV) within a person is irradiated with different beams from different directions, wherein the intensity of the beams is spatially modulated by using a multi-leaf collimator (MLC). Before applying IMRT to a person, the treatment plan is calculated, for example, based on: position and shape of the PTV, number of beams, technical characteristics of the MLC, prescribed target radiation dose to be applied to the PTV, organ at risk (OAR ) position and shape etc. The treatment plan should be determined such that the PTV receives the prescribed target radiation dose, while the radiation dose applied to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10
CPCA61N5/1031A61N5/1045A61N5/1036A61N5/1077
Inventor V·兰加纳坦U·S·兰詹
Owner KONINKLJIJKE PHILIPS NV