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A Generation Method for Observing the Distribution Image of the Total Dose of Radiation Therapy for Uterine Tumors

A dose distribution, uterine tumor technology, applied in the field of X-ray radiation measurement, can solve problems such as inaccuracy

Inactive Publication Date: 2015-08-26
SOUTHERN MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method can also obtain registration results, and the registration results can be applied to the assessment of radiotherapy radiation dose, but because this method directly uses the image containing the applicator for registration, if the obtained image is used Obviously inaccurate for radiotherapy radiation dose assessment

Method used

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  • A Generation Method for Observing the Distribution Image of the Total Dose of Radiation Therapy for Uterine Tumors
  • A Generation Method for Observing the Distribution Image of the Total Dose of Radiation Therapy for Uterine Tumors
  • A Generation Method for Observing the Distribution Image of the Total Dose of Radiation Therapy for Uterine Tumors

Examples

Experimental program
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Effect test

example 1

[0068] Example 1 (Generation of the distribution image of the total dose of radiotherapy for uterine tumors)

[0069] In this embodiment, the pelvic HDR CT image ( figure 1 ), HDR dose distribution image ( figure 2 ), pelvic IMRT CT images ( image 3 ) and pelvic IMRT dose distribution images ( Figure 4 ) describe the method of the present invention in detail, and its specific steps are as follows:

[0070] Step 1: Read in as figure 1 The resolutions shown are all 256*256*108 pelvic HDR CT images containing applicators and such as figure 2 The HDR dose distribution image shown and as image 3 The resolutions shown are all 256*256*108 pelvic IMRT CT images without applicators and such as Figure 4 Pelvic IMRT dose distribution images shown.

[0071] Step 2: Since the applicator is metal and has a built-in source of X-ray radiation, the applicator is figure 1 The CT value of the corresponding area is greater than 200HU, that is, the pixel value is greater than 1200, a...

example 2

[0085] Example 2 (analysis and comparison of effects)

[0086] The method proposed by the present invention is mainly applied to dose superposition in radiotherapy, so as to evaluate the actual total dose of radiation received by a patient during the entire radiotherapy period. In this embodiment, the dose distributions of HDR brachytherapy internal irradiation and IMRT external irradiation are shown in the attached figure 2 And attached Figure 4 shown. From attached figure 2 It can be seen that there are radiation doses both inside and outside the source applicator. Obviously, the dose inside the source applicator must be removed before dose stacking, because only the patient's tissue exposure dose is considered in the dose evaluation.

[0087] In order to compare the difference between the method of the present invention and existing methods, the present invention and Christensen G E (references Christensen G E, Carlson B, Chao K S, Yin P, Grigsby P W, Nguyen K, Dempse...

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Abstract

The invention relates to measurement of X-ray radiation, in particular to a method for generating a distribution image for observing cervix tumor radiotherapy total dose. The method comprises the following steps: dividing a source applicator area in an image containing a source applicator HDRCT according to the magnitude of pixel point CT value, and conducting binarization processing to obtain a mask image; utilizing the mask image to conduct shrinkage distortion and linear interpolation processing on the HDRCT image, using the processed image as a floating image and using a pelvic cavity IMRTCT image as a reference image to conduct distortion rectification; finally, using an obtained rectification distortion field to conduct distortion on an HDR dose distribution image with source applicator area dose removed, and the distortion result being overlapped with an HDR dose distribution image not containing a source applicator and then being fused with the IMRTCT image not containing the source applicator. The image generated according to the method can be used for accurately commenting the total dose radiated by a cervix tumor patient.

Description

technical field [0001] The invention relates to the measurement of X-ray radiation, in particular to a method for generating images for evaluating radiation doses of uterine tumor radiotherapy. Background technique [0002] In conventional radiotherapy, the patient's computed tomography (CT, Computed Tomography) image acquired for the first time is used as the planning image, and only the planned CT image is used to generate a treatment plan to treat the patient. But in fact, in each fractionated treatment, the patient's internal anatomical structure will change, such as the error of the technician's positioning, the peristalsis of the patient's internal organs, and the tumor will shrink with the progress of radiotherapy. Planning and implementing radiation therapy will inevitably lead to serious dose errors and may involve normal tissue into high-dose areas. Adaptive radiotherapy (ART, Adaptive Radiotherapy) technology can solve the above problems. ART technology obtains ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T11/00A61B6/03
Inventor 甄鑫周凌宏王琳婧陈海斌肖阳胡洁
Owner SOUTHERN MEDICAL UNIVERSITY
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