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Method and system for calibration

一种成像系统、定位系统的技术，应用在用于放射诊断的仪器、应用、放射疗法等方向，能够解决不适合医疗系统使用等问题，达到精确校准的效果

Active Publication Date: 2016-12-21
ELEKTA AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are not suitable for use in medical systems

Method used

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  • Method and system for calibration
  • Method and system for calibration

Examples

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Embodiment Construction

[0045] Description of the preferred embodiment

[0046] refer to figure 1 , the radiation therapy system 1 applicable to the present invention includes a radiation unit 10 and a patient positioning unit 20 . In the radiation unit 10, a radiation source, a radiation source holder, a collimator main body, and an external shielding member are provided. The collimator body includes a number of collimator channels directed at a common focus as is known in the art.

[0047] The collimator body also acts as a radiation shield, preventing radiation from reaching the patient except through the collimator channel. An example of a collimator arrangement applicable in the radiotherapy system of the present invention can be found in WO2004 / 06269 A1, which is hereby incorporated by reference.

[0048] Patient positioning unit 20 includes a rigid frame 22 , a slidable or moveable frame 24 , and a motor (not shown) for moving frame 24 relative to frame 22 . The stand 24 is also provided w...

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Abstract

The present invention relates to the field of radiation therapy. In particular, the invention concerns a method of calibrating a positioning system in a radiation therapy system comprising a radiation therapy unit having a fixed radiation focus. The method comprises the steps of irradiating a calibration tool comprising at least one reference object, capturing at least one two-dimensional image including cross- sectional representations of reference objects of the calibration tool and determining image coordinates of the representation of each reference object. Based on the reference objects image coordinates, positions of the reference objects in the stereotactic coordinate system relative to an origin of the calibration tool and the position of the origin of the calibration tool relative to the imaging unit, a position difference between the position of the calibration tool in the stereotactic coordinate system and a position of the calibration tool in an imaging system coordinate system including a translational and rotational position difference is calculated

Description

field of invention [0001] The present invention relates to the field of radiation therapy. In particular, the invention relates to a method of calibrating a positioning system in a radiation therapy system comprising a radiation therapy unit with a fixed radiation focus. Background of the invention [0002] Over the years, the development of surgical technology has made great progress. For example, for patients requiring brain surgery, non-invasive procedures are now available that are very minimally invasive to the patient. [0003] One system for non-invasive surgery is the Leksell Gamma marketed under the name , which provides such procedures by means of gamma radiation. Radiation is emitted from a multitude of stationary radiation sources and focused by means of collimators, ie passages or channels for obtaining beams of limited cross-section, towards a defined target or treatment zone. Each source delivers a dose of gamma radiation insufficient to damage intervenin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10
CPCA61B6/032A61B6/50A61B6/583A61N5/1075A61N2005/1061A61N2005/1076A61N5/1039
Inventor 简斯·斯约伦德
Owner ELEKTA AB
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