Precise positioning and posing system and method for radiation treatment of cancer patient

Abstract

The invention relates to a precise positioning and posing system for the radiation treatment of a cancer patient, and the system comprises an imaging device, a positioning bed and an image processingsystem. The imaging device is used for projecting an optical signal to a body surface area of a patient on the positioning bed or a treatment bed and receiving the optical signal, and converting the optical signal into an electrical signal. The image processing system performs image reconstruction and image matching of the received electric signal and moves the position of the treatment bed according to the matching result. The invention also relates to a method for accurately positioning and posing for radiation treatment of the cancer patient by using the system, thereby solving a problem that a current cancer positioning and posing method cannot meet the requirements of precise radiotherapy for position accuracy, repeatability and retrospectability.

Description

technical field [0001] The invention relates to the field of medical equipment, and relates to a system and method for precise positioning and positioning of radiation therapy for tumor patients. Background technique [0002] Radiation therapy (hereinafter referred to as "radiotherapy") is one of the main methods for the treatment of malignant tumors. With the development of radiotherapy-related hardware and software, especially the introduction of fusion technology of multimodal images (PET-CT, MRI, SPET-CT, PET-MR, etc.) Continuous optimization and updating make the delineation of tumor target area more accurate, the calculation of radiotherapy dose is more accurate, the curative effect of tumor control is significantly improved, and the toxicity related to radiotherapy is reduced to varying degrees, so that the position of radiotherapy is further consolidated, and the indications are expanded. The range is further extended. [0003] The improvement of irradiation target...

AI Technical Summary

Problems solved by technology

However, in the positioning of body tumors, including tumors in the chest, abdomen, pelvis, and limbs, the reliability of positioning and positioning based on the "cross" line is relatively poor, and tumor patients in these parts constitute 80% of radiotherapy patients. %, including common breast cancer, lung cancer, esophageal cancer, gastric cancer, liver cancer, pancreatic cancer, colorectal cancer, cervical cancer, prostate cancer, etc.

For example, the positioning "ten" marking line is mostly drawn on the patient's body surface skin, which is greatly affected by the patient's skin deformation, especially in the elderly and obese patients, and sometimes the treatment positioning deviation is even as high as 10 mm

[0006] The traditional positioning and positioning technology based on the body surface auxiliary line method ("ten" line) has been used for nearly a century. Although it is simple and easy to implement, it obviously cannot meet the position accuracy requirements of modern precise radiotherapy, and it has many limitations. Including: (1) The marking line is greatly affected by the patient's skin deformation, especially in the elderly and obese patients; (2) There is currently no specific and unified standard for the water pen used as a positioning mark, and the staff of various medical units even The marking lines drawn by the same radiotherapy technician each time are different in thickness, depth, and straightness

(3) It is not conducive to discovering and correcting the rotation offset of the patient's position, especially when the lines are short and thick

(4) Affected by the patient's skin sweating, oil, clothing friction and other factors, the epidermal marking line is easy to fade and become blurred, and the marking line is deformed, thickened, mixed and difficult to identify after adding color; There are different degrees of allergies to ink, which increases the medical cost and psychological burden of patients, and even affects the progress of treatment

(6) The current model does not have the function of real-time position detection during treatment, so it is impossible to make real-time judgments on the patient's discomfort or autonomous subjective changes during treatment, which constitutes one of the factors that affect the risk of radiotherapy efficacy

(7) The current treatment positioning process is mainly carried out by the therapist alone, lacking effective real-time recording supervision and positioning review and tracking analysis mechanism, so there are positioning deviations caused by human factors, especially in the evening shift treatment easy to happen

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