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Method and system for positioning soft tissue lesion based on dual-energy X-ray images

An X-ray and soft tissue technology, applied in the field of medical image registration system, can solve inaccurate problems, reduce damage and improve registration speed

Active Publication Date: 2014-07-09
JIANGSU RAYER MEDICAL TECH GO LTD
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Problems solved by technology

[0004] Radiation therapy for patients using existing image-guided X-ray imaging techniques for IGRT (for example, radiation therapy for thoracic tumors) requires surgical implantation of one or more Metal markers, which indirectly estimate tumor movement by detecting the position of metal markers, is an invasive and imprecise method that needs improvement

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  • Method and system for positioning soft tissue lesion based on dual-energy X-ray images
  • Method and system for positioning soft tissue lesion based on dual-energy X-ray images
  • Method and system for positioning soft tissue lesion based on dual-energy X-ray images

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Embodiment Construction

[0054] The core of the present invention is to generate a soft tissue DRR image library along the out-of-plane translation direction, and define a registration window containing a lesion (for example, a tumor) in the DRR image (which can be called a soft tissue DRR image) of the image library; The energy X-ray imaging technique generates a soft tissue X-ray image, and uses the soft tissue X-ray image as a registered image, and estimates the values ​​of the in-plane translation parameter and / or the out-of-plane translation parameter according to the registration window.

[0055] The above-mentioned dual-energy X-ray imaging technology refers to the continuous collection of two X-ray images of the same part of the human body with high and low energy X-rays. Due to the different attenuation coefficients of X-rays of different energies of human tissues, the two images will be different. The optical density distribution of the two images can be weighted and subtracted to give the di...

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Abstract

The invention discloses a method and system for positioning a soft tissue lesion based on dual-energy X-ray images. The method comprises the following steps of: generating a three-dimensional image of a patient and offline generating a soft tissue DRR (Digitally Reconstructed Radiograph) image library along a plane inside translation direction; acquiring high- and low-energy X-ray images of the patient and generating a soft tissue X-ray image of the patient; taking the soft tissue X-ray image as a registered image and estimating values of a plane inside translation parameter and a plane outside translation parameter by using a registering window including the lesion in the DRR image in the soft tissue DRR image library generated offline; adjusting the three-dimensional image by a newest parameter estimation result for the plane outside translation parameter and generating the soft tissue DRR image library along the plane outside translation direction on line; and taking the soft tissue X-ray image as the registered image and further estimating the values of the plane inside translation parameter and the plane outside translation parameter by using the registering window including the lesion in the DRR image in the soft tissue DRR image library generated on line.

Description

technical field [0001] The invention relates to a medical image registration system, in particular to a soft tissue lesion localization system based on a dual-energy X-ray image. 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, so as to achieve precise radiation therapy for tumors, reduce damage to normal tissues around tumors, and improve treatment effects for patients. 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, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/00
Inventor 付东山
Owner JIANGSU RAYER MEDICAL TECH GO LTD
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