CN217187509U

CN217187509U - Collimator identification device for radiotherapy equipment

Info

Publication number: CN217187509U
Application number: CN202220102673.8U
Authority: CN
Inventors: 曹学国; 李虎
Original assignee: Jiangsu Ruier Medical Science & Technology Co ltd
Current assignee: Jiangsu Ruier Medical Science & Technology Co ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2022-08-16
Anticipated expiration: 2032-01-17

Abstract

The utility model discloses a collimator identification device for radiotherapy equipment, which comprises a collimator with a groove and a bulge, a printed circuit board and a coding identification mechanism; an annular printed circuit board is arranged above the collimator; processing grooves or bulges at different positions of the top of the collimator, wherein the grooves or bulges form a code of the collimator, and the code recognition mechanism comprises a telescopic probe arranged on an annular printed circuit board and is provided with the positions of the grooves or bulges corresponding to the top of the collimator; when the top position of the collimator below the probe is a groove or a bulge, the probe outputs a logic high level or a logic low level; the signals corresponding to a plurality of different positions and the output logic form a multi-bit code; the device can simply, quickly and accurately identify the type of the collimator according to the multi-bit codes, completely meets the requirements of radiotherapy, has reasonable processing position, does not influence the service performance of the collimator, and improves the accuracy and the reliability of an identification result.

Description

Collimator identification device for radiotherapy equipment

Technical Field

The utility model belongs to the technical field of radiosurgery robot equipment, concretely relates to collimator recognition device for radiotherapy equipment.

Background

Image Guided Radiation Therapy (IGRT) is a new tumor radiotherapy technology developed gradually in the last decade, and performs precise target positioning before therapeutic irradiation and target motion tracking during Therapy to realize precise radiotherapy of tumors.

When using circular collimators on current radiotherapy apparatus, only one collimator is installed at a time. The robotic radiosurgery accelerator system mainly performs stereotactic radiotherapy, usually a treatment plan of which is completed by using a plurality of collimators with different apertures, but for radiotherapy equipment capable of automatically switching collimators, different types of collimators in the treatment process need to be switched, and the switched collimators need to be automatically and accurately identified so as to better perform treatment according to the treatment plan, and no such device exists in the prior art. Thus affecting the efficiency and accuracy of radiation therapy.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, the utility model discloses a collimator recognition device for radiotherapy equipment is applicable to the secondary collimator device that can realize automatic fast switch-over.

The utility model discloses complete technical scheme includes:

a collimator identification device for radiotherapy equipment comprises a collimator with grooves and bosses, a printed circuit board and a code identification mechanism;

an annular printed circuit board is arranged above the collimator;

grooves or bosses are respectively processed at different positions on the top of the collimator, the grooves or bosses form codes of the collimator, and different codes are correspondingly arranged on collimators of different types;

the code recognition mechanism comprises a plurality of telescopic probes provided with pull-up resistors, and the telescopic probes are arranged on the annular printed circuit board and correspond to the positions of the grooves or the bosses arranged at the top of the collimator; a spring is arranged in the probe, when the top end position of the collimator below the probe is a groove, the probe is not in contact with the collimator, a signal is open-circuited and is logic 1, and a logic high level is output; when the top end of the collimator below the probe is a boss, the telescopic probe is contacted with the collimator and compressed, the signal is short-circuited to the ground and is logic 0, and a logic low level is output; the signals corresponding to a plurality of different positions and the output logic form a multi-bit code; and identifying the collimator with the corresponding model according to the multi-bit code.

Preferably, the outer diameter of the printed circuit board is smaller than the outer diameter of the collimator cylinder, and the inner diameter of the printed circuit board is larger than the inner diameter of the collimator cylinder with the largest aperture.

Preferably, grooves or bosses are processed at four different positions on the top of the collimator, the grooves correspond to logic 1, the bosses correspond to logic 0, 16 combination modes are provided, and the collimator corresponds to 16 types of collimators.

Preferably, the top of the collimator is respectively provided with grooves or bosses on the positions of annular surfaces formed by taking phi 32, phi 36, phi 40 and phi 44 as diameter sizes, the radial width size of the grooves or bosses is 2mm, and the axial depth of the grooves or bosses is 2 mm.

Preferably, the collimator is a secondary collimator, is fixed on the collimator fixing mechanism, and can be rotationally positioned under the driving of the rotary driving mechanism.

Preferably, the annular printed circuit board adopts two sets of redundant designs, is connected with 8 retractable probes which are uniformly distributed and fixed, and the thimble is radially and symmetrically distributed in a spiral mode, and each set consists of 4 retractable probes.

Compared with the prior art, the utility model the advantage lie in: aiming at the requirement that the switched collimator needs to be automatically and accurately identified in an automatic switching collimation system, a groove or a boss is processed at the top of the collimator, a multi-bit code is formed according to different contact states of a telescopic probe and the collimator, the collimator with the corresponding model is identified according to the multi-bit code, and the model of the collimator can be identified simply, quickly and accurately; the processing positions of the grooves and the bosses are reasonable, and the performance and the use of the collimator cannot be influenced. The processing parameters are optimized, and the collimators with 16 models can be identified at most, so that the requirements of radiotherapy are completely met. Meanwhile, the circuit board adopts a redundant design, so that the accuracy and the reliability of the identification result are improved.

Drawings

FIG. 1 is a schematic view of the identification device of the present invention;

FIG. 2 is a schematic diagram of a collimator groove coding structure and recognition principle;

FIG. 3 is a schematic diagram of a 10mm collimator encoded as 1001;

fig. 4 is a schematic diagram of a 25mm collimator encoded as 0101.

In the figure, 1-a collimator, 2-a printed circuit board, 3-a code recognition module, 4-a fixing mechanism, 5-a groove, 6-a boss, 7-a telescopic probe and 8-a pull-up resistor.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in figure 1, a collimator identification device for radiotherapy equipment comprises a collimator 1 with grooves and bosses, a printed circuit board 2 and a code identification mechanism;

the collimator is a secondary collimator, is fixed on the collimator fixing mechanism 4 and can be driven by the rotary driving mechanism to rotate and position. The top of the collimator is respectively provided with a groove 5 or a boss 6 on the position of an annular surface formed by taking phi 32, phi 36, phi 40 and phi 44 as diameter sizes, and the groove or the boss forms the code of the collimator, wherein the groove is logic 1, and the boss is logic 0; the radial width of each groove or boss is 2mm, and the axial depth is 2 mm; different types of collimators are provided with different codes.

An annular printed circuit board 2 is arranged above the collimator, the outer diameter of the printed circuit board is smaller than the outer diameter of the collimator cylinder, and the inner diameter of the printed circuit board is larger than the inner diameter of the collimator cylinder with the largest aperture.

The code identification mechanism comprises a

code identification module

3, 4

telescopic probes

7 and 4 pull-up resistors 8. The telescopic probe adopts a gold-plated high-strength elastic telescopic thimble, a spring is arranged in the gold-plated high-strength elastic telescopic thimble, a contact is arranged in the gold-plated high-strength elastic telescopic thimble, the contact current can be continuous 15A, the conduction internal resistance is less than 10m omega, the maximum compression stroke is 2.29mm, and 176g of force is needed when the compression force is reduced by 1.5 mm.

The telescopic probe is arranged on the annular printed circuit board and corresponds to the position of the top groove or the boss of the collimator. Preferably, the annular printed circuit board adopts two sets of redundant designs, is connected with 8 evenly distributed and fixed telescopic probes, and the thimble is radially and symmetrically distributed in a spiral mode. Each group consists of 4 pogo pins.

In this embodiment, grooves or bosses are processed at four different positions on the top of the collimator, the grooves correspond to logic 1, the bosses correspond to logic 0, and 16 combination methods are total: such as 0000,0001, 0010,0011, 1001.. 1110,1111, a maximum of 16 collimators can be identified.

As shown in fig. 2, the collimator groove coding structure and the identification method are that after a rotary driving mechanism drives a certain type of collimator to a designated position, a telescopic probe on an annular printed circuit board is in contact with the top of the collimator, when the top end of the contacted part is a groove, the telescopic probe is in a normal state, the probe is not in contact with the collimator, a signal is open-circuited and is logic 1, and a logic high level is output. When the top end of the collimator is a boss, the telescopic probe is in contact with the collimator and is compressed, the signal is short-circuited to the ground and is logic 0, and a logic low level is output. The four signals corresponding to the four different positions and the output logic form a four-bit code, the printed circuit board sends the output result to the code identification module, the code identification module identifies and confirms the type of the corresponding collimator, for example, the code of the 10mm collimator is 1001, as shown in fig. 3, the code of the 25mm collimator is 0101, as shown in fig. 4.

The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.

Claims

1. A collimator identification device for radiotherapy equipment is characterized by comprising a collimator with grooves and bulges, a printed circuit board and a code identification mechanism;

an annular printed circuit board is arranged above the collimator;

grooves or bulges are respectively processed at different positions on the top of the collimator, the grooves or the bulges form codes of the collimator, and different codes are correspondingly arranged on collimators of different types;

the code recognition mechanism comprises a plurality of telescopic probes and a code recognition module, wherein the telescopic probes are provided with pull-up resistors, and the telescopic probes are arranged on the annular printed circuit board and correspond to the positions of grooves or bulges arranged on the top of the collimator; a spring is arranged in the probe, when the top end position of the collimator below the probe is a groove, the probe is not in contact with the collimator, a signal is open-circuited and is logic 1, and a logic high level is output; when the top end of the collimator below the probe is convex, the telescopic probe is contacted with the collimator and compressed, a signal is short-circuited to the ground and is logic 0, and a logic low level is output; the signals corresponding to a plurality of different positions and the output logic form a multi-bit code; and the code identification module identifies the collimator with the corresponding model according to the multi-bit code.

2. The collimator identification device for a radiation therapy apparatus according to claim 1, wherein said printed circuit board outer diameter is smaller than the collimator cylinder outer diameter and the inner diameter is larger than the inner diameter of the maximum aperture collimator cylinder.

3. The collimator identification device of claim 1, wherein the top of the collimator is formed with grooves or protrusions at four different positions, the grooves corresponding to logic 1 and the protrusions corresponding to logic 0, and 16 combinations of the grooves and the protrusions correspond to 16 types of collimators.

4. A collimator identification device for radiation therapy equipment according to claim 3, wherein the collimator tip is grooved or embossed at the position of the annular surface formed with the diameter sizes Φ 32, Φ 36, Φ 40, Φ 44, respectively.

5. The collimator identification device for a radiation therapy apparatus according to claim 4, wherein the grooves or projections have a radial width dimension of 2mm and an axial depth of 2 mm.

6. The collimator identification device for radiation therapy equipment according to claim 3, wherein said collimator is a secondary collimator fixed on the collimator fixing mechanism and capable of being rotationally positioned by the rotation driving mechanism.

7. The collimator identification device for radiation therapy equipment according to claim 3, wherein said annular printed circuit board is of two redundant designs, and 8 retractable probes are connected and fixed uniformly, said needles are distributed radially and symmetrically in a spiral manner, and each group is composed of 4 retractable probes.