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Three dimensional localization and tracking for adaptive radiation therapy

A radiotherapy and adaptive filter technology, applied in the system field of three-dimensional tracking of tumors, can solve the problem of 2DMR slices not including tumors, etc.

Active Publication Date: 2018-01-09
ELEKTA AB
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, 2D MR slices are usually acquired at specific locations on the patient's body, and due to target organ or tumor motion, 2D MR slices may not include the tumor / target

Method used

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  • Three dimensional localization and tracking for adaptive radiation therapy
  • Three dimensional localization and tracking for adaptive radiation therapy
  • Three dimensional localization and tracking for adaptive radiation therapy

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Embodiment Construction

[0021] In the present disclosure, a radiotherapy system and a corresponding method for localizing and tracking a tumor in the anatomy of a patient undergoing radiotherapy treatment are presented. Specifically, during radiotherapy treatment planning, multiple 3D magnetic resonance images (MRI) or 4D MRI images are captured. The precise location of a target (eg, a tumor in a patient's anatomy) can be determined by the radiation therapy system using segmentation techniques known in the art. After the location of the tumor is determined, the system can generate multiple image patches and can determine the offset from the center of the image patch to the tumor. Radiation therapy systems can enhance selected features of multiple image patches using methods such as correlation or using appearance modeling techniques, which lead to multiple adaptive filter models. These adaptive filter models can then be used by the radiotherapy system during the actual "online" treatment of the pati...

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Abstract

The present disclosure relates to systems, methods, and computer-readable storage media for segmenting a medical image. Embodiments of the present disclosure may locate and track a moving, three-dimensional (3D) target in a patient undergoing image-guided radiation therapy. For example, an adaptive filter model for a region of interest in the patient may be received, wherein the adaptive filter model is based on the target to be tracked. An image acquisition device may obtain a two-dimensional (2D) slice of a region of interest in the patient. A processor may then apply the adaptive filter model to the 2D slice, wherein the adaptive filter model includes an offset value. The processor may also determine a location of the target in the 2D slice based on the adaptive filter model. The processor may also estimate a potential location of the target based on the offset value. The processor may then repeat one or more of the above steps to track the moving target during image-guided radiation therapy of the patient.

Description

[0001] Cross References to Related Applications [0002] This application is related to 12475.0058-00000 entitled "Three Dimensional Localization and Tracking of a Moving Target for Adaptive Radiation Therapy" filed on January 28, 2015, The entire content of this application is incorporated herein by reference. technical field [0003] The present disclosure generally relates to radiation therapy or radiotherapy. More specifically, the present disclosure relates to systems and methods for three-dimensional tracking of tumors used in planning radiation therapy treatments to be used during radiation therapy. Background technique [0004] Radiation therapy is used to treat cancer or other diseases in the tissues of mammals, such as humans and animals. One such radiotherapy technique is the "Gamma Knife", by which the patient is irradiated with a large number of low-intensity gamma rays focused at a target (eg, a tumor) with high intensity and high precision. In another examp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10G06T7/246
CPCA61N5/1037A61N5/1049G06T7/246G06T2207/30096A61N5/1039G06T2207/10081G06T2207/10088A61N2005/1055
Inventor 韩骁周燕
Owner ELEKTA AB
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