Preparation method and application method of individualized compensation film

Abstract

The invention discloses a preparation method and an application method of an individualized compensation film, which belong to the field of medical auxiliary instruments. The problem that an existingcompensation film is poor in attachment to a body surface curved surface is solved. The method comprises the steps of firstly, fixing a patient's body position capable of being repeatedly operated; then marking an identification ring completely containing a target area; then taking body surface contour data in the acquired identification ring as compensation film bottom surface data; determining contour data of the upper surface of the compensation film according to a ray effective dose range, a patient target area depth range and protected tissue depth; and generating 3D data of the compensation film through 3D modeling. The thickness non-uniform compensation film prepared by the method can further guarantee that important organs and normal tissues are protected from being damaged as muchas possible while residual tumor tissues of the patient are effectively killed. The postoperative recovery time of the patient is shortened.

Description

technical field [0001] The invention belongs to the field of medical auxiliary equipment, and in particular relates to a preparation technology of an individualized tissue compensation membrane suitable for radiotherapy of human superficial tumors. Background technique [0002] In radiation therapy, the maximum percentage dose can only be reached after the radiation passes through a certain thickness of tissue, which is clinically called the built-up effect. For superficial tumors, the radiation dose directly exposed to radiation is low, which cannot meet the treatment requirements. In order to increase the radiation dose of skin and other superficial tissues, clinically, materials with electron density close to water (also known as tissue Compensations, dermal fillers, tissue equivalents) fit the skin so that the built-up area begins on the surface of the compensator. In addition, after the ray intensity reaches the maximum value in the tissue, it will attenuate as it goes...

AI Technical Summary

Problems solved by technology

[0003] The advantages and disadvantages of the routine use of compensators in clinical practice are obvious: the material and thickness of the compensating glue are uniform, the flexibility is good, and the plane fit is good, but the fit to the curved surface of the body is poor, so the compensating glue is only suitable for flat and smooth surfaces. Compensation for body surface parts; rice bags, water bags, oil sand, paraffin and other compensators can be manually shaped to adapt to the contours of the patient’s body surface, so the fit is better than that of compensation glue, but its film thickness cannot be precisely controlled, and the material’s The flexibility and uniformity are poor, and there will still be gaps on the body surface of the large curved surface, and it is not suitable for the vertical parts of the body surface

[0004] The application of 3D printing technology to make individualized compensation film is an ideal solution: it can not only conform to the patient's body surface completely, but also has the characteristics of good material uniformity; at present, there are many reports and patent applications on the production of individualized compensation film by 3D printing technology, However, there is no standard data acquisition and related operation methods for clinical use, only limited to how to prepare a compensation film that is consistent with the contour of the body surface and has a uniform thickness.

However, it is not correct to use 3D individualized compensation film according to the traditional method of compensation film: compensation glue, rice bag, water bag, oil sand, paraffin and other traditional compensation products are conformable products after placement, and can be placed on the patient’s body surface at will Yes, as long as it can cover the treatment area; and the conformability of the individualized compensation film produced by 3D printing comes from the patient's body surface contour data, so its placement position is unique, so it must be obtained after obtaining the patient's body surface contour data Only by marking the boundary of the proposed compensation film on the patient’s body (visible and consistent with the naked eye and images) can it be placed accurately; at the same time, because the difference in the patient’s body posture and respiratory movement may cause changes in the body surface contour, the patient’s body contour is collected. Before displaying the contour data, it is necessary to fix the patient's body position and posture in a way that is easy to repeat, easy to maintain, and the target area is least affected by respiratory movement, otherwise it will affect the fit of the individualized compensation film during the treatment process, thereby affecting Compensation effect and radiotherapy dose accuracy

Therefore, the existing 3D printing technology for making individualized compensation membranes cannot achieve ideal clinical results because the validity of the collected data is not guaranteed, and the accuracy of product installation is not guaranteed.

Images