Integration of user inputs and correction of deformation vector field in deformable image registration workflow

A vector field, in-image technique used in areas involving graphical user interface details, image enhancement, image analysis, etc., to solve problems such as insufficiently accurate contours

Active Publication Date: 2014-05-07
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the resulting contours are sometimes not precise enough and require manual correction
Also, contours are usually not propagated to all aspects of radiation treatment planning

Method used

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  • Integration of user inputs and correction of deformation vector field in deformable image registration workflow
  • Integration of user inputs and correction of deformation vector field in deformable image registration workflow
  • Integration of user inputs and correction of deformation vector field in deformable image registration workflow

Examples

Experimental program
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Embodiment Construction

[0021] refer to figure 1 , describing an illustrative intensity-modulated radiation therapy (IMRT) system. Intensity modulated radiation therapy is performed as fractionated radiation therapy, ie over a series of radiation therapy sessions. Before radiation therapy begins, planned images of a subject (eg, tumor patient, animal undergoing veterinary radiation therapy, etc.) are acquired. The planning images are typically transmission computed tomography (CT) images, although planning images may be obtained by another imaging modality such as magnetic resonance (MR), such as positron emission tomography (PET) or single photon emission computed tomography ( SPECT) emission mode and so on to obtain. Also, it should be understood that a planning image may require the acquisition of a volumetric (3D) image, a row of planar (2D) images that together define a volumetric image, etc., and that the planning image may use two or more different imaging modalities. As an example of the l...

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Abstract

A deformation vector field (DVF) (22) is computed that relatively spatially registers a first image (16) and a second image (14). A contour (26) delineating a structure in the first image is adapted using the DVF to generate an initial contour (52) for the structure in the second image (14). A final contour (56) is received for the structure in the second image. The DVF is corrected based on the initial and final contours for the structure in the second image to generate a corrected DVF (32).The correction may comprise computing an adjustment DVF (62) relating the initial and final contours and combining the DVF and the adjustment DVF to generate the corrected DVF. The final contour may be received by displaying the second image overlaid with the initial contour, and receiving user adjustments of the overlaid contour with the overlaid contour updated for each received user adjustment.

Description

technical field [0001] The following relates to the field of medical imaging. It relates in particular to image registration of sequential images acquired in connection with the execution of fractionated radiation therapy and is described with particular reference thereto. The following more generally relates to the registration of images with previously acquired and usually segmented images. Background technique [0002] In fractionated radiation therapy, the radiation dose is spread over a series of radiation therapy sessions. Fractionation of radiation doses offers certain benefits, such as allowing patients to recover between courses, and enabling medical staff to assess the effectiveness of radiation therapy from one course to another and make adjustments, for example, to accommodate the presence of malignancies in Decrease in size over time (perhaps due to effectiveness of radiation therapy). [0003] In intensity-modulated radiation therapy (IMRT), radiation beams ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00A61N5/10
CPCA61N5/103G06T2200/24G06T2207/10081G06T2207/10088G06T2207/10104G06T2207/10108G06T2207/20012G06T2207/20104G06T2207/30096G06T7/30G06F3/0481G06F3/04845G06T7/0012
Inventor Y·马尔亚K·A·布兹杜泽克
Owner KONINKLJIJKE PHILIPS NV
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