Implantation guide plate design method and implantation guide plate

Abstract

The invention provides an implantation guide plate design method and an implantation guide plate, and the method comprises the following steps: S1, determining a feasible solution space based on the image information of a patient; S2, based on needle passage optimization factors, screening out multiple groups of needle passage designs from the feasible solution space determined in the step S1; and S3, performing dose optimization on the multiple groups of needle passage designs screened out in the step S2 to select a group of needle passage designs with the optimal dose volume. According to the implantation guide plate design method, the needle passage design of the implantation guide plate is optimized by adopting objective evaluation indexes to replace manual experience, so that the personalized implantation guide plate is obtained, and when the personalized implantation guide plate is applied to an internal irradiation plan, the irradiation dose endangering organs can be reduced to the greatest extent while the irradiation dose of a target region is improved.

Description

technical field [0001] The invention relates to an implanting guide plate for brachytherapy, in particular to a design method of the implanting guide plate and the implanting guide plate. Background technique [0002] Brachytherapy, also known as internal irradiation, corresponds to external irradiation (long-distance irradiation), and is to directly implant a packaged radioactive source into the patient's tumor site through a source applicator or a source catheter for irradiation. The intensity of the radiation source used for brachytherapy is small, the effective treatment distance of the radiation is short, and most of its energy is absorbed by the tumor tissue. The dose distribution around the radioactive source decreases according to the square of the distance from the radioactive source—the inverse square law. Brachytherapy is seldom used alone. It is generally used as an adjuvant therapy for external radiation. It can give higher doses to specific parts to improve th...

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Problems solved by technology

[0006] 1. The perineal template can guide the needle insertion direction and protect the normal tissues around the pelvic cavity. However, Chinese researchers believe that the vaginal template will occupy the vaginal volume and affect the operating field of vision. In addition, the template type is single, and its conformability is poor. Poor, large fixation damage, so more needles are placed with bare hands

[0007] 2. my country adopts freehand implantation under local anesthesia, which is relatively convenient and flexible, and is easy to carry out and popularize. However, because there is no guidance for implantation templates, and the pain response of patients recovers quickly under local anesthesia, it greatly interferes with the implantation operation. Often there will be uneven distribution of insertion and implantation needles. Repeated insertion will increase the pain of the patient, cause damage to surrounding tissues, and increase bleeding. Therefore, freehand insertion and implantation requires clinicians to have rich experience and skilled skills

[0008] 3. In recent years, 3D printing technology has made the positioning of the needle track in brachytherapy more repeatable, but the selection of the needle track still depends on the personal experience of the clinician, and the individual differences are obvious, which limits the follow-up stay The optimal space for point time optimization cannot achieve the optimal target irradiation dose and the protection of organs at risk

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