Offline dose verification method based on improved CBCT (cone beam computed tomography) images

A CT image and dose verification technology, applied in the field of off-line dose verification of CBCT images, can solve problems such as no longer applicable, achieve the effects of improving accuracy, precise adaptive radiotherapy and individual radiotherapy, and avoiding imaging differences between individuals

Inactive Publication Date: 2014-09-10
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Aiming at the defect that the shape of the patient's target area changes with the progress of the treatment in the existing radiation therapy technology, the original plan is no longer applicable. The present

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  • Offline dose verification method based on improved CBCT (cone beam computed tomography) images
  • Offline dose verification method based on improved CBCT (cone beam computed tomography) images
  • Offline dose verification method based on improved CBCT (cone beam computed tomography) images

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Embodiment Construction

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] figure 1 A flow chart of an offline dose verification method based on an improved CBCT image provided by an embodiment of the present invention. Such as figure 1 As shown, the offline dose verification method based on the improved CBCT image of this embodiment may specifically include the following steps:

[0033] 100. Perform scatt...

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Abstract

The invention discloses an offline dose verification method based on improved CBCT (cone beam computed tomography) images. The offline dose verification method includes: subjecting the CBCT images of an individual patient to scatter correction on the basis of Monte-Carlo simulation to acquire a first CBCT image; rectifying the first CBCT image with a planned CT (computed tomography) image to acquire target-region deformation field information; verifying outline information of the planned CD image according to the target-region deformation field information, transplanting the verified outline information to the CBCT images to acquire a second CBCT image; establishing HU-ED calibration curves of the CBCT images according to average HU value of a particular tissue area of the individual patient in the second CBCT image and ED value of a particular tissue area of the planned CT image; performing dose calculation and planned validation on the basis of the second CBCT image, the HU-ED calibration curves, the planned CT and standard CT-ED calibration curves. By the technical scheme, treatment time and cost of the patient can be saved, and accurate adaptive radiation therapy and individual radiation therapy are realized.

Description

technical field [0001] The invention relates to the technical field of radiotherapy, in particular to an off-line dose verification method based on an improved CBCT image. Background technique [0002] Image-guided Radiotherapy (IGRT) technology is used to collect patient image data before or during treatment, automatically track the target, and automatically adjust the positioning error during radiotherapy and the error caused by the movement of the target area in time to ensure Accurately administer the prescribed dose to a specific treatment area to achieve precise radiotherapy. At present, cone beam computed tomography (ConeBeam computed tomography; cone beam CT; CBCT) equipment is mostly used clinically to obtain patient image information before treatment to verify the patient's setup and monitor changes in the target area. [0003] As the course of treatment progresses, tumor regression or growth, and patient weight loss will occur, that is, the position and shape of ...

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Application Information

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IPC IPC(8): A61B6/03A61N5/00G06T7/00
Inventor 王玉曹瑞芬陈朝斌胡丽琴吴宜灿
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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