CN217886775U

CN217886775U - Seed implantation dosage verification device

Info

Publication number: CN217886775U
Application number: CN202123287893.7U
Authority: CN
Inventors: 张子健; 程婷婷
Original assignee: Xiangya Hospital of Central South University
Current assignee: Xiangya Hospital of Central South University
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-11-25
Anticipated expiration: 2031-12-24

Abstract

The utility model discloses a seed grain implantation dosage verification device, including the base, establish two tissue simulation box bodies on the base, be equipped with the gap of inserting the film between two tissue simulation box bodies, be equipped with the filler of the human soft tissue of simulation in two tissue simulation box bodies. The utility model discloses an use the method of packing human equivalent silica gel material in the tissue simulation box, both can solve the problem that many grain seed dose distribution was verified, can simulate the process of carrying out grain seed implantation again on the soft tissue, through the analysis to the film, can verify dose and position simultaneously, obtain the verification effect of relatively ideal. The utility model discloses simple structure, convenient to use has not only compensatied the blank that the seed was implanted and is verified the die body, can carry out dosage and position verification simultaneously moreover.

Description

Seed implantation dosage verification device

Technical Field

The utility model belongs to radiotherapy verifies the device, concretely relates to seed implantation dosage verification device.

Background

Malignant tumor is one of the biggest threats to human life and health, and the treatment methods of the tumor comprise operation, radiotherapy, chemotherapy and the like, wherein the operation and the radiotherapy are local treatment methods, and the tumor at some parts is not suitable for surgical excision and is suitable for using brachytherapy. The radioactive particle brachytherapy is suitable for local malignant tumors, has strong lethality, thorough destruction and quick response, can quickly improve the state of the tumor, and can better replace local surgical treatment.

However, in clinical practice, the quality control means for radioactive seeds is very single, and most hospitals directly calculate the radioactive seeds according to the attached files of factories without performing quality control. A small percentage of hospitals use well-type ionization chambers to measure the activity of seeds. Dose distribution of radioactive 125I seed sources in China Radiology Med Prot, december 2006, vol 26, no.6, by Wasteyu et al, a square thermoluminescent dose detector was used to measure the dose distribution of single-particle seeds, and the seeds were placed in previously drilled square or round holes in a mold body to study the influence of different angles on the dose distribution.

However, the above measurements, which only examine the dose activity and dose distribution of the individual seeds per se, are very different from the clinical case of seed implantation.

Thus, two problems arise: firstly, the seeds are clinically implanted into a patient through an implantation needle, and the precision of the device may cause the position of the implanted position, so that the process of implanting the seeds needs to be simulated, and the influence of the implantation process on the clinical position is considered. Secondly, in clinic, a plurality of seeds are often treated, the dose distribution of the seeds is not only the superposition of the dose distribution of single seeds, but also the influence of the seeds on the scattering dose needs to be considered, so the influence of the seeds on the clinical dose distribution when the seeds are irradiated simultaneously needs to be considered.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, convenient to use verifies effectual grain seed implantation dosage verification device.

Realize the utility model discloses the technical scheme that the purpose was adopted as follows:

the utility model provides a dose verifying attachment is implanted to grain seed, including the base, establish two tissue simulation box bodys on the base, be equipped with the gap of inserting the film between two tissue simulation box bodys, the filler of simulation human soft tissue is equipped with in two tissue simulation box bodys.

The tissue phantom box body adopts polylactic acid or organic glass with the density close to that of human soft tissue.

The filler is a silica gel material equivalent to human tissues.

The top of the tissue simulation box body is provided with scales.

The utility model discloses still including covering protection casing on the tissue die body box body.

The base and the protective cover are made of lead or tungsten steel materials.

Advantageous effects

The utility model discloses mainly be applied to the dose verification that brachytherapy grain seed was implanted, place the film between the tissue simulation box body, implant the grain seed in the filler of the human soft tissue of simulation in the tissue simulation box body, treat the film fully exposed back, can obtain the dose distribution that the interpolation was planted between the tissue.

The utility model discloses an use the method of packing human equivalent silica gel material in organizing the simulation box, both can solve the problem that many grain seeds dose distribution was verified, can simulate this process of grain seed implantation again on the soft tissue, through the analysis to the film, can verify dose and position simultaneously, obtain the verification effect of ideal.

The utility model discloses simple structure, convenient to use has not only compensatied the blank that the seed was implanted and is verified the die body, can carry out dosage and position verification simultaneously moreover.

The technical scheme of the utility model is further explained in the following with the attached drawings.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a left side view of fig. 1.

Fig. 4 is another schematic structural diagram of the present invention.

Detailed Description

Example 1

Referring to fig. 1-3, the utility model provides a seed implantation dosage verification device, which comprises a base 1 and two tissue simulation boxes 2 arranged on the base 1, wherein a gap 4 for inserting a film 5 is arranged between the two tissue simulation boxes 2, and fillers for simulating human soft tissues are arranged in the two tissue simulation boxes 2.

The top of the tissue simulation box body 2 is provided with scales 6, so that when an implantation needle is conveniently inserted, the position of the implantation needle is evaluated.

The tissue phantom box body 2 is made of PLA (polylactic acid) or organic glass, the density of the tissue phantom box body is close to the density of human soft tissues, and the attenuation of the dose in a human body can be effectively simulated.

The filler is a silica gel material equivalent to human tissue, can effectively simulate human soft tissue, can accurately simulate the attenuation of dosage, and can also accurately simulate the feedback of soft tissue to seed implantation equipment in the process of implanting seeds into a human body.

Example 2

Referring to fig. 4, in this embodiment, a protective cover 7 capable of covering the tissue phantom case 2 is added on the basis of embodiment 1, and the base 1 and the protective cover 7 are made of lead or tungsten steel, etc., so as to ensure that the film is not radiated to surrounding people for a long time during the exposure process.

The utility model discloses a use method:

1. filling the silica gel material into the two tissue simulation box bodies 2, and curing the silica gel material;

2. inserting a film 5 into a gap 4 between the two tissue simulation box bodies 2 to clamp;

3. according to a seed implantation quality control plan, implanting seeds by using implantation needles at different positions and different depths of a silica gel material in the simulation box bodies 2 organized on two sides of the film 5;

4. covering a protective cover, and standing the seeds in a silica gel material for a period of time until the film is fully exposed;

5. the film 5 is removed and analyzed for dose and position.

After the seed implantation dose verification is completed, the seeds and the silica gel material in the tissue simulation box body 2 are taken out, and the silica gel material is filled again next time, so that the tissue simulation box body can be repeatedly used.

Claims

1. A seed implantation dose verification device is characterized by comprising a base and two tissue simulation box bodies arranged on the base, wherein a gap for inserting a film is arranged between the two tissue simulation box bodies, and fillers for simulating human soft tissues are filled in the two tissue simulation box bodies.

2. The device for verifying the implantation dose of seeds of claim 1, wherein the tissue simulation cassette is made of polylactic acid or plexiglass.

3. The seed implant dose verification device of claim 1 or 2, wherein the filler is a silicone material equivalent to human tissue.

4. The device for verifying the dose of a seed implant as set forth in claim 1, wherein the tissue simulation cassette body has a scale on a top thereof.

5. The seed implant dose verification device of claim 1, further comprising a protective shield that covers the tissue simulation cassette.

6. The seed implant dose verification device of claim 5, wherein the base and shield are made of a lead or tungsten steel material.