Adaptive radiation therapy method with target detection

A technique for radiotherapy, radiographs, used in the field of target detection during radiotherapy

Inactive Publication Date: 2008-09-03
CARESTREAM HEALTH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The present invention is based on US Patent Serial No. 11 / 039422, which discloses a method of implementing target detection in radiotherapy, which solves the problem of target detection in 2-D captured radiographic images by: 1) The capture configuration used for radiography at the time of treatment is based on the analysis of digitally reconstructed radiographs (DRR) generated from CT planning images

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  • Adaptive radiation therapy method with target detection
  • Adaptive radiation therapy method with target detection
  • Adaptive radiation therapy method with target detection

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Embodiment Construction

[0024] The following is a detailed description of preferred embodiments of the present invention with reference to the accompanying drawings, in which like reference numerals denote like structural elements.

[0025] figure 1 An exemplary radiation therapy system with automatic target position detection is shown. refer to figure 1 , the patient 130 is on a support member such as a treatment couch 132 . The patient is strapped with two or more external markers 138 . The position of the external markers is monitored by a camera 139 . The treatment radiation source 136 is aimed at the isocenter 134 under treatment.

[0026] The radiographic unit consists of a diagnostic X-ray source 135 and a digital X-ray imaging device 133 images the region of the target 131 . A radiotherapy system would preferably have more of that radiographic unit to enable positioning of targets in three dimensions.

[0027] The system has a method to accurately determine the position and orientation ...

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Abstract

The present invention provides a method for delivering radiation therapy to a patient using a three-dimensional planning image for radiation therapy of the patient wherein the planning image includes a radiation therapy target includes the steps of: determining a digitally reconstructed radiograph from the planning image; identifying a region of the target's projection in the digitally reconstructed radiograph; capturing a radiographic image corresponding to the digitally reconstructed radiograph; identifying a region in the captured radiographic image; comparing the region of the target's projection in the digitally reconstructed radiograph with the identified region in the captured radiographic image; and determining a delivery of the radiation therapy in response to this comparison.

Description

technical field [0001] The present invention relates generally to a radiotherapy system, and more particularly to target detection during radiotherapy, or target detection during radiotherapy without the use of internal markers. Background technique [0002] When radiation therapy is applied to extracranial tumors, the movement of the tumor target results in a decrease in the radiation dose to the tumor and an increase in the radiation dose to normal tissue. This is especially relevant for lung tumors that move due to respiration. [0003] (Large section omitted) [0004] US Patent No. 6731970 discloses the use of metals as markers for target tracking. Metallic markers have high contrast in radiographs relative to human tissue. This makes its location easy to detect manually or automatically. However, this approach has serious drawbacks, including the need for an invasive procedure to implant the markers, and the fact that markers and tumor motility do not correlate perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00A61N5/00
CPCA61N2005/1062A61N5/1065G06T2207/10124A61N5/1049G06T7/0083G06T2207/30096G06T7/0091G06T2207/20152G06T7/0081A61N2005/1059A61N5/1069A61N2005/1061A61N5/1064G06T7/003G06T5/30G06T2207/30061G06T7/337G06T7/11G06T7/12G06T7/155
Inventor J·S·施尔德克劳特S·陈
Owner CARESTREAM HEALTH INC
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