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A technology for repeated positioning and positioning marking, which is applied in radiation therapy, X-ray/γ-ray/particle irradiation therapy, image data processing, etc. It can solve the problems that the accuracy is difficult to guarantee, and the patient is not solved, so as to reduce the positioning error, The effect of improving treatment accuracy and reducing uncertainty
Inactive Publication Date: 2020-12-15
SHANGHAI PULMONARY HOSPITAL
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It can reduce the movement of patients during positioning, improve patient comfort, reduce positioning errors caused by human factors, and improve work efficiency; however, it still does not solve the problem of fixed patient positions, but provides a space to control the treatment bed position, and replace the marked points on the patient's body surface by recording the marked points in the space, which still has great requirements on the patient's position and body shape, and the accuracy is still difficult to guarantee
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Embodiment 1
[0033] attached figure 1 It is a schematic flow chart of a repeated positioning method of the present invention, such as figure 1 As shown, the method includes at least steps S102-S106:
[0034] Step S102: Construct virtual information of the target object, wherein the target object is an area on the target matrix that cannot be directly located;
[0035] It should be understood that the target object in this embodiment may be the target itself, and may also include a relatively fixed and iconic object near the target object, which is distinguished in its virtual information representation, such as different coloring processes, etc.
[0036] In some optional embodiments, constructing target object virtual information includes:
[0037] Step S1022: Acquiring target object information in the target matrix;
[0038] As in the embodiment, when the target mother body is the patient body surface and the target object is a lesion area, obtaining the target object information in th...
Embodiment 2
[0061] This embodiment will illustrate the present invention in conjunction with specific applications.
[0062] For patients requiring radiotherapy for pleural tumors;
[0063] S2: Acquiring target object information in the target mother body;
[0064] Use CT to take CT images of the patient's chest;
[0065] S4: Constructing target object virtual information according to the target object information:
[0066] Please see attached image 3 , with image 3 It is the three-dimensional model reconstructed in this embodiment; the obtained CT image is imported into Mimics software, and the bone structure is firstly reconstructed by using the software to generate a three-dimensional model of the bone, and then the software is used to reconstruct the tumor in the lesion area, that is, the diseased tissue structure, to generate It should be noted that the above three-dimensional model of the bone and the three-dimensional model of the diseased tissue are constructed on the basis ...
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Abstract
The invention discloses a repeated localization method and system, and relates to the field of radiotherapy positioning. The repeated localization method comprises the steps: constructing virtual information of a target object, wherein the target object is relatively fixed with a target matrix in position, and is located in an area, which cannot be directly localized, on the target matrix; establishing communication: importing the virtual information of the target object into a virtual environment; and performing matching localization: superposing the virtual environment and a real environment, wherein the virtual information of the target object is matched with the target matrix. The invention further discloses a system using the repeated localization method. The system comprises a constructing module used for constructing the virtual information of the target object; a communication module used for importing the virtual information of the target object into the virtual environment; and a matching module used for superposing the virtual environment and the real environment and matching the virtual information of the target object with the target matrix. The method and the system have the advantage that a target which cannot be directly localized can be repeatedly and accurately localized in different spaces at different time, and are especially suitable for radiotherapy positioning localization.
Description
technical field [0001] The invention relates to a positioning method, in particular to a repeated positioning method and system. Background technique [0002] In tumor radiotherapy, positioning accuracy is closely related to the curative effect of treatment. Strict control of positioning error can not only improve the accuracy of tumor treatment, but also reduce the response of normal tissues. [0003] At present, the conventional way to solve the problem of the accuracy of radiotherapy positioning and positioning at home and abroad is to use airborne imaging equipment for image-guided radiotherapy to improve the accuracy of IGRT technology in radiotherapy positioning. Although IGRT technology can improve the accuracy of radiation therapy, the quality of airborne images is generally not high, and the accuracy of identifying tumors in its images is not good; and it can only image the human body at a specific moment, which is different from the planned one. There is a certain...
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