CN201253214Y - Device for stereo positioning tumor in radiotherapy - Google Patents

Abstract

The utility model belongs to the field of medical equipment and auxiliary devices, and relates to a device for three-dimensional positioning of tumors in radiotherapy, in particular to a positioning bed board for stereotaxic positioning of radiotherapy tumors, which consists of a flat plate 1, a beam 2 and a small arc-shaped groove 3. The flat plate is made of carbon fiber or glass fiber material, and a beam is installed on the back of the plate, and arc-shaped small grooves are respectively arranged at both ends of the beam. The clinical trial of the utility model shows that the planar bed board of the device can be well fastened with the concave bed surface of the CT machine. The bed board has a simple structure, extremely convenient and accurate installation, and good repeatability.

Description

A device for stereotaxic positioning of radiotherapy tumors

technical field

The utility model belongs to the field of medical equipment and auxiliary devices, and relates to a device for three-dimensional stereotaxic positioning of radiotherapy tumors, in particular to a positioning bed board for stereotaxic positioning of radiotherapy tumors.

Background technique

At present, radiation therapy for tumors is one of the main methods of tumor treatment. In order to achieve the maximum lethality of radiation on tumor tissue and at the same time protect the normal tissues around the tumor to the greatest extent, before radiation therapy, a CT machine must be used for three-dimensional positioning of the tumor. Therefore, the three-dimensional stereotaxic positioning of tumors is the basic technical requirement of tumor radiation therapy and the basic guarantee for achieving precise radiation therapy and improving curative effect.

The whole process of stereotaxic above is generally divided into the following three steps:

1. Scan the patient's tumor on the CT machine;

2. According to the obtained CT images, use the radiotherapy planning system (TPS) to formulate the corresponding radiotherapy plan;

3. The patient returns to the CT machine again, and one or several radiotherapy irradiation centers determined in the treatment plan are reset to the patient's body surface or the corresponding phantom.

The positioning scan and reset in the above steps are all completed on the CT machine, which is also called the CT simulation positioning of the tumor (that is, simulating the position of the patient during radiotherapy on the linear accelerator). It can be seen that in order to make the carefully planned TPS plan be implemented accurately and completely, it is first necessary to require the patient's body position at the time of reset to be precisely coincident with the body position at the time of scanning positioning.

The special bed board for tumor stereotaxic positioning in radiotherapy is a device for assisting tumor patients in performing three-dimensional stereotaxic positioning of tumors on a computerized tomography imaging system (hereinafter referred to as CT machine). Advantages, and can be used with a variety of CT machines of different models.

To achieve the above-mentioned precise coincidence, the bed surface of the CT machine must be flat, while the existing CT machine tools all have a concave arc-shaped surface. For this reason, it is necessary to cover a flat bed board on the original CT machine bed, and the bed board must be able to meet the following conditions:

1. The flat bed board should be able to fully buckle with the original CT machine arc-shaped bed surface, and when the CT machine board runs along the Y-axis or Z-axis direction, there should be no displacement in any direction between the two bed boards;

2. The flat bed board should be able to be installed and disassembled flexibly, and must have very good repeatability.

However, there are currently two types of flat bed boards provided in the market: one is that the front and back sides are flat bed boards, which are only placed on the shoulders on both sides of the curved bed of the CT machine during installation, and cannot be well matched with it. Fastening, when the arc-shaped bed surface of the CT machine moves up, down, forward, and backward (that is, along the Y-axis or Z-axis direction), the followability of this flat bed board is poor. The front side of another kind of bed board is a plane, and the back side is a convex arc, which coincides with the concave arc-shaped bed of the CT machine. When this kind of bed board is installed, the two arc surfaces may be rotated and misaligned with each other, so that the levelness of the bed board must be checked and adjusted every time it is installed, so the installation is time-consuming and laborious, and the repeatability is poor.

Contents of the invention

The purpose of the utility model is to overcome the defects in the prior art and provide a device for three-dimensional stereotaxic positioning of radiotherapy tumors, in particular to a positioning bed board for radiotherapy tumor stereotaxic positioning.

The utility model provides a special flat bed board, which can be well fastened with the concave bed surface of a CT machine. The key of the planar bed board structure of the utility model is: the left and right sides of the back of the bed board are provided with arc-shaped small grooves, and its specific position corresponds to the curvature of the small grooves on the left and right sides of the arc-shaped bed surface of the CT machine. Consistent with the curvature of the shoulder process.

The utility model adopts carbon fiber or glass fiber material with high ray transmittance to make a plane plate 1 with a length of 180-200 cm and a width of 55 cm. The back of the plate is equidistantly installed with 3-6 beams 2 ( Depending on the structural strength needs of the board), an arc-shaped small groove 3 is respectively arranged at the two ends of each beam. The distance L between the small grooves at both ends of the beam is 40-43 cm, and L is consistent with the distance between the shoulders 5 on both sides of the CT machine tool surface 4. The arc radius R of the small grooves is 4-8 mm, which is consistent with the arc of the shoulders. The R phase is consistent, and the arc-shaped small groove is buckled with the shoulder process of the arc-shaped bed surface of the CT machine.

The plane plate of the utility model is suitable for different CT machines.

The bed board of the utility model has the advantages of simple structure, extremely convenient installation and good repeatability, and the installation accuracy is guaranteed by the mechanical structure of the bed board. Has the following advantages:

1. The flat bed board of the utility model can always be tightly buckled with the curved bed board of the CT machine, and maintain the same horizontal state without any longitudinal and lateral displacement;

2. The flat bed board of the utility model can be installed and disassembled flexibly, and has very good repeatability.

Description of drawings

Fig. 1 is a structural representation of the utility model,

Among them, 1: Flat plate, 2: Beam, 3: Small circular groove, 4CT machine surface: 5: Shoulder.

Fig. 2 is the actual situation that the small groove of the utility model is engaged with the shoulder process of the curved bed surface of the CT machine when the utility model is installed.

Detailed ways

In conjunction with the accompanying drawings of the description, the utility model is further described.

Example 1

A planar plate 1 with a length of 180 cm and a width of 55 cm is made of carbon fiber material. Three beams 2 are equidistantly installed on the back of the plate along the long axis direction, and an arc-shaped small groove 3 is arranged at both ends of each beam. The spacing L of the small grooves at the two ends of the crossbeam is set to 40cm, and L is consistent with the distance between the shoulders 5 on both sides of the CT machine tool surface 4. The arc radius R of the small grooves is 4mm, which is consistent with the arc R of the shoulders. , the arc-shaped small groove is fastened with the shoulder process of the curved bed surface of the CT machine.

The clinical trial results show that the bed board of the utility model has the advantages of simple structure, convenient installation, high precision and good repeatability.

Example 2

A planar plate 1 with a length of 200 cm and a width of 55 cm is made of glass fiber material. Six beams 2 are installed equidistantly along the long axis on the back of the plate. An arc-shaped small groove 3 is arranged at both ends of each beam. The distance L between the small grooves at both ends is 43cm, and L is consistent with the distance between the shoulders 5 on both sides of the CT machine tool surface 4. The arc radius R of the small grooves is 8mm, which is consistent with the arc R of the shoulders. The small arc-shaped groove is fastened with the shoulder process of the arc-shaped bed surface of the CT machine.

The clinical trial of the utility model shows that the flat bed board of the device can be well fastened with the concave bed surface of the CT machine. The bed board has a simple structure, extremely convenient and accurate installation, and good repeatability.

The CT machine that the utility model experiment adopts is purchased from American GE company or Phillips company.

Claims (5)

1, a kind of device that radiotherapy tumor stereotaxic is used, it is characterized in that is made up of planar plate (1), crossbeam (2) and arc-shaped small groove (3), described planar plate adopts carbon fiber or glass fiber material The beam is installed on the back of the plate, and the two ends of the beam are respectively provided with arc-shaped small grooves. 2. The device for stereotaxic positioning of radiotherapy tumors according to claim 1, characterized in that the length of the plane plate is 180-200 cm, and the width is 55 cm. 3. The device for stereotaxic positioning of radiotherapy tumors according to claim 1, characterized in that 3 to 6 beams are installed equidistantly along the long axis of the plane plate. 4. The device for stereotaxic positioning of radiotherapy tumors according to claim 1, characterized in that the distance between the arc-shaped small grooves is 40-43 cm, and the arc radius of the small grooves is 4-8 mm. 5. The device for stereotaxic positioning of radiotherapy tumors according to claim 1, characterized in that the arc-shaped small groove is engaged with the shoulder process of the arc-shaped bed surface of the CT machine.

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