Two-dimensional and three-dimensional medical image registration method and system

A technology for medical images and three-dimensional images, which is applied in image analysis, image data processing, graphic image conversion, etc., and can solve the problems of registration speed, registration accuracy and registration success rate.

Active Publication Date: 2011-10-19
JIANGSU RAYER MEDICAL TECH GO LTD
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AI Technical Summary

Problems solved by technology

[0004] The registration speed, registration accuracy and registration success rate of the existing 2D-3D image registration method used in the image guidance based on X-ray imaging technology are low, and need to be improved

Method used

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  • Two-dimensional and three-dimensional medical image registration method and system
  • Two-dimensional and three-dimensional medical image registration method and system
  • Two-dimensional and three-dimensional medical image registration method and system

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Embodiment Construction

[0141] The core of the present invention is to estimate the in-plane translation parameters, in-plane corner parameters and out-of-plane corner parameters based on the DRR image library generated along the out-of-plane direction, and further based on the DRR images generated along the out-of-plane direction Library to estimate out-of-plane translation parameters.

[0142] Firstly, the X-ray imaging geometry and coordinate system involved in the present invention will be described.

[0143] figure 1 The X-ray imaging geometry and coordinate system are described. Such as figure 1 As shown, the X-rays emitted by the X-ray source penetrate the three-dimensional imaged body (patient), and generate a perspective image on the two-dimensional imaging plane, which is called an X-ray image. figure 1 in, s and o p represent the center of the X-ray source and the center of the imaging plane, respectively.

[0144] figure 1 , the three-dimensional coordinate system (oxyz) is the pati...

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Abstract

The invention relates to a two-dimensional and three-dimensional medical image registration method and a system, wherein the method comprises the steps of: generating a three-dimensional image of a three-dimensional imaged body, and generating a DRR (data receiving register) image library in an offline manner along the direction of a rotating angle outside the plane; acquiring an X-ray image of the three-dimensional imaged body; taking the X-ray image as a registered image, taking the DRR image in the DRR image library generated in an offline manner as a reference image, and respectively carrying out estimation on values such as a transition parameter in the plane, and/or a rotating angle parameter in the plane, and/or a rotating angle parameter outside the plane; taking a newest parameter estimation result as a reference position to carry out adjustment on a three-dimensional image, and generating the DRR image library along the rotating angle directions outside the two planes; taking the X-ray image as the registered image, taking the DRR image in the newest DRR image library generated in an online manner along the rotating angle directions outside the two planes as the reference image, and respectively carrying out estimation on values such as the transition parameter in the plane, and/or the rotating angle parameter in the plane, and/or the rotating angle parameter outsidethe plane.

Description

technical field [0001] The invention relates to a medical image registration method and system, in particular to a 2D-3D (two-dimensional-three-dimensional) medical image registration method and system. Background technique [0002] Image-guided radiation therapy (IGRT) is the latest theory and technology of tumor radiation therapy and tumor radiosurgery developed gradually in the past decade, and is a milestone of modern radiation therapy. IGRT uses advanced imaging equipment and image processing methods to locate and track patients' lesions before and during treatment to achieve precise radiation therapy for tumors, reduce damage to normal tissues around tumors, and improve patient outcomes. IGRT is the basis for all modern emerging radiation therapy techniques such as stereotactic neuroradiosurgery (SRS), stereotactic body radiation therapy (SBRT), image-guided intensity-modulated radiation therapy (IG-IMRT), and image-guided IGRT core technology. [0003] At present, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T3/00
Inventor 付东山
Owner JIANGSU RAYER MEDICAL TECH GO LTD
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