CN216571251U

CN216571251U - Miniature radiation source heat source position precision detector

Info

Publication number: CN216571251U
Application number: CN202122794331.5U
Authority: CN
Inventors: 王管奇
Original assignee: BEIJING KE-LIN-ZHONG MEDICAL TECHNIQUE INSTITUTE
Current assignee: Beijing Kelinzhong Medical Technology Co.,Ltd.
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-05-24
Anticipated expiration: 2031-11-16

Abstract

The utility model discloses a miniature radiation source heat source position precision detector which comprises a reticle 3, a slide rail 1 and a microspur camera 2, wherein the reticle 3, the slide rail 1 and the microspur camera 2 are assembled together; the slide rail 1 and the graduated scale 3 are installed in parallel, the microspur camera 2 is installed on the slide rail 1 just opposite to the graduated scale 3, and the microspur camera 2 is driven by a motor 4 on the slide rail to move on the slide rail through a transmission mechanism. The utility model can solve the technical problems that the repeatability precision consistency of the reaching position of the radioactive source and the precision of the treatment position can be conveniently observed, and the bracket for fixing the camera and the graduated scale is enlarged because the full scale of the traditional device needs to be seen.

Description

Miniature radiation source heat source position precision detector

Technical Field

The utility model belongs to an accessory of medical equipment, and mainly relates to an accessory of short-range radiotherapy equipment.

Background

The micro radioactive source is used to deliver the micro radioactive source to the periphery of pathological change (mainly cancer) tissue or the interior of pathological change of human body, and the radioactive ray kills cancer cells to achieve the aim of treating tumor. This technique requires high precision in the position of the radiation source to reach the diseased tissue in the body. The cells killed by the radiation in vivo are not diseased cancer cells or good cells of normal tissues. This requires that the radiation source must be delivered to the prescribed location in the body as required by the physician. The machine for conveying the radioactive source is called a rear loading machine. The repeatability precision of the afterloader delivering the radiation source to the prescribed location and the precision of the treatment position are detected and calibrated using the hospital after each replacement of a new radiation source. Because the radioactive source is on the emission line at any time, the detection personnel can not observe the consistency of the arrival position of the radioactive source and the repeat accuracy of the treatment position in a short distance. Currently, there are two methods for detecting the consistency of the radiation source reaching the position and the repeatability of the treatment position. One is a film exposure method. The slow photosensitive film is put in advance at the position where the radioactive source is to arrive, the radioactive source stays for a certain time when arriving at the position, then stays for a certain time at each treatment position to leave an exposure point on the film, and the accurate condition of the running precision of the machine is determined according to the central position of the exposure point. This method is time consuming to wash and has some error in finding the center of the exposure spot. The second method is to horizontally place a reticle (with the precision of 1mm) which is larger than 300mm at the middle position of a support similar to a cross, then fix a camera at the top end of the cross support, and align a lens downwards to the reticle. During detection, the machine running radioactive source moves in the graduated scale, and a detector can observe the repeatability precision consistency of the position reached by the radioactive source and the precision of the treatment position at the far end through shooting. This method is much more convenient than the first exposure method, which is what you see is what you get, but to see the full scale through the camera, the distance between the camera and the scale is increased, and the distance is increased, which increases the bracket for fixing the camera and the reticle. There is inconvenience.

Disclosure of Invention

The utility model aims to provide a miniature radiation source heat source position precision detector, which can be used for solving the technical problems that the repeatability precision consistency of the reaching position of a radiation source and the precision of a treatment position can be conveniently observed, and the technical problem that a bracket for fixing a camera and a reticle scale is enlarged due to the fact that the scale of a full scale needs to be seen in the existing device can be solved.

In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model is as follows:

a position precision detector for a heat source of a miniature radioactive source comprises a reticle ruler (3), a slide rail (1), a motor (4) and a microspur camera (2); assembling the reticle ruler (3), the slide rail (1) and the microspur camera (2) together; the sliding rail (1) and the ruling ruler (3) are installed in parallel, the microspur camera (2) is installed on the sliding rail (1) opposite to the ruling ruler (3), a toothed wheel is installed on the motor (4), a bracket provided with the microspur camera (2) is fixed on the toothed belt, and when the motor (4) rotates, the toothed belt meshed with the toothed wheel is driven to rotate, so that the rotary motion of the motor (4) is converted into the horizontal movement of the microspur camera (2) on the sliding rail (1).

The scribing ruler 3 is a 300mm scribing ruler, the precision is 0.5mm, and the motor drives the camera to move on the sliding rail in a range covering the whole course of the 300mm scribing ruler.

The utility model has the advantages that:

the radioactive source to be detected is guided to the reticle ruler by the guide tube, and the detection personnel can easily see the repeated precision consistency of the position of the radioactive source reaching the reticle of the reticle ruler and the precision of the treatment position. Although the observation scope of the macro camera is 120mm, the whole range of 300mm can be seen by driving the camera to move on the sliding rail through the motor. The utility model discloses an improve the precision that detects, improved 0.5mm from 1 mm. And greatly reduce the volume and is very convenient to use.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a left side view of the present invention.

Numbering in the figures: 1. slide rail, 2, microspur camera, 3, groove chi, 4, motor.

Detailed Description

The specific structure of the utility model is shown in figures 1, 2 and 3. A position precision detector for a heat source of a miniature radioactive source comprises a graduated scale 3, a slide rail 1, a motor 4 and a microspur camera 2, wherein the graduated scale 3, the slide rail 1 and the microspur camera 2 are assembled together; the slide rail 1 and the ruling ruler 3 are installed in parallel, and the microspur camera 2 is installed on the slide rail 1 just opposite to the ruling ruler 3.

The macro camera 2 is driven by a motor 4 through a transmission mechanism to move on the slide rail. The specific mode is that a tooth-shaped wheel is arranged on a motor 4, a bracket provided with a macro camera 2 is fixed on a tooth-shaped belt, and when the motor 4 rotates, the tooth-shaped belt meshed with the tooth-shaped wheel is driven to rotate, so that the rotary motion of the motor 4 is converted into the horizontal movement of the macro camera 2 on a sliding rail 1.

According to the utility model, a 300mm reticle ruler (with the precision of 0.5mm)3 and a macro camera 2 with a slide rail 1 are assembled together, the slide rail 1 and the reticle ruler 3 are installed in parallel, and the macro camera 2 is installed on the slide rail 1 opposite to the reticle ruler 3. The scale and the precision which are amplified by more than five times on the graduated scale can be clearly seen by detection personnel at the far end through camera shooting, the scale of the graduated scale is increased to the precision of 0.5mm, and the detection personnel can clearly see the gap between half millimeters. The radioactive source to be detected is guided to the reticle ruler by the guide tube, and the detection personnel can easily see the repeated precision consistency of the position of the radioactive source reaching the reticle of the reticle ruler and the precision of the treatment position. Although the observation scope of the microspur camera is 120mm, the whole range of the 300mm ruler can be seen by driving the camera to move on the slide rail through the motor. The device is placed in a box with the length, width and height of 320mmX120mmX120 mm. The utility model discloses an improve the precision that detects, improved 0.5mm from 1 mm. And greatly reduce the volume and is very convenient to use.

Claims

1. A position precision detector for a heat source of a miniature radioactive source is characterized by comprising a reticle ruler (3), a slide rail (1), a motor (4) and a microspur camera (2); assembling the reticle ruler (3), the slide rail (1) and the microspur camera (2) together; the sliding rail (1) and the graduated scale (3) are installed in parallel, the microspur camera (2) is installed on the sliding rail (1) just opposite to the graduated scale (3), a toothed wheel is installed on the motor (4), a support provided with the microspur camera (2) is fixed on the toothed belt, and when the motor (4) rotates, the toothed belt meshed with the toothed wheel is driven to rotate, so that the rotary motion of the motor (4) is converted into the horizontal movement of the microspur camera (2) on the sliding rail (1).

2. The apparatus according to claim 1, wherein the reticle (3) is a 300mm reticle with a precision of 0.5mm, and the motor drives the camera to move on the slide rail over the whole range of the 300mm reticle.