Shooting and Verification Method of Intensity Modulated Radiation Field Confirmation Film

Abstract

The invention discloses a shooting method and validation for a validation film of intensity modulated radiation therapy. The method is characterized in that a therapeutic machine MV level image validation device is utilized, a shooting function is used, and a double-exposure, triple-exposure and multi-exposure imaging technology, a therapy interruption field joint technology and a single-frame continuous collection mode are adopted; first, through common confirmation of a physician and a doctor, a therapy plan of a patient is transmitted to an image guide system; points are marked on surface of skin according to three-dimensional coordinate values given by a system in first-time body position arrangement and then triple- or multi-exposure imaging technology is adopted; then a sub field shape is formed by adopting the therapy interruption field joint technology and validation film image information is stored. According to the invention, a problem of a conventional method that a validation film in the actual treatment angle in intensity modulated radiation therapy cannot be acquired is solved, the neighboring relation between the field shape and the exposure range and normal tissuesis confirmed, and the invention has advantages of being accurate in positioning and causing less pain of patients.

Description

technical field [0001] The present invention relates to the field of radiation therapy, and more specifically, to a method for shooting and verifying an intensity-modulated radiotherapy field verification film. Background technique [0002] Radiation therapy for oncology, or radiotherapy for short, is the treatment of cancer with radiation. Radiation therapy has experienced more than a century of development history. After Roentgen discovered X-rays and Marie Curie discovered radium, they were soon used in the clinical treatment of malignant tumors. Up to now, radiotherapy is still an important local treatment method for malignant tumors. About 70% of cancer patients need radiotherapy in the course of cancer treatment, and about 40% of cancers can be cured with radiotherapy. The role and status of radiotherapy in tumor treatment is becoming more and more prominent. Radiation therapy has become one of the main means of treating malignant tumors. Radiation therapy is only ...

AI Technical Summary

Problems solved by technology

Tumor radiation therapy generally adopts double-exposure imaging technology to take radiotherapy field position verification films, which can confirm the shape of the irradiation field, the irradiation range, and the adjacent relationship with normal tissues outside the field, and can compare with the planned DRR film to determine the degree of conformity between the two , to judge the patient's treatment position, to ensure the accuracy of the radiotherapy position, and is mostly used for field verification of conformal radiotherapy; while the field of intensity-modulated radiotherapy is composed of several small sub-fields to form a field consistent with the shape of the tumor (field, middle field and combined field method), and the distribution of dose intensity is uneven; conventional methods cannot be used to take field verification films of the actual treatment angle of intensity-modulated radiotherapy, and to confirm the adjacent relationship between the field shape and the irradiation range and normal tissues

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