阅读说明：本技术 一种多叶光栅控制系统、方法、装置及存储介质 (Multi-leaf grating control system, method, device and storage medium ) 是由 叶绍强 于 2019-10-18 设计创作，主要内容包括：本发明实施例公开了一种多叶光栅控制系统、方法、装置及存储介质,该系统包括：测量模块,用于触发光耦开关的光束遮挡信号,其中,测量模块包括至少一个带通孔的测量组件；光耦开关,光耦开关包括光束发生器和光束接收器,其中,光束接收器用于接收产生的光束遮挡信号；编码器,用于生成并记录测量模块的位置信息；驱动器,用于驱动测量模块移动；控制器,与光耦开关、编码器和驱动器通信连接,用于控制驱动器按预设移动规则驱动测量模块移动,相应的,还用于获取编码器生成的测量模块的位置信息,并基于位置信息对叶片进行零位校准。本发明实施例通过预设移动规则得到叶片组件的位置信息,使得叶片组件的零位校准位置更加精确。(The embodiment of the invention discloses a multi-leaf grating control system, a method, a device and a storage medium, wherein the system comprises: the measuring module is used for triggering a light beam shielding signal of the optical coupling switch, wherein the measuring module comprises at least one measuring component with a through hole; the optical coupling switch comprises a light beam generator and a light beam receiver, wherein the light beam receiver is used for receiving the generated light beam shielding signal; the encoder is used for generating and recording the position information of the measuring module; the driver is used for driving the measuring module to move; and the controller is in communication connection with the optical coupling switch, the encoder and the driver, is used for controlling the driver to drive the measuring module to move according to a preset moving rule, is corresponding to the preset moving rule, is also used for acquiring the position information of the measuring module generated by the encoder, and is used for carrying out zero calibration on the blade based on the position information. According to the embodiment of the invention, the position information of the blade assembly is obtained through the preset moving rule, so that the zero calibration position of the blade assembly is more accurate.)

1. A multi-leaf raster control system, comprising:

the measuring module is used for triggering a light beam shielding signal of the optical coupling switch, wherein the measuring module comprises at least one measuring component with a through hole;

the optical coupling switch comprises a light beam generator and a light beam receiver, wherein the light beam receiver is used for receiving a generated light beam blocking signal;

the encoder is used for generating and recording the position information of the measuring module;

the driver is used for driving the measuring module to move;

the controller, with opto-coupler switch, encoder with the driver communication connection is used for controlling the driver is according to predetermineeing the drive of removing the rule the measuring module removes, and is corresponding, still be used for acquireing the encoder generates measuring module's positional information, and based on positional information is right the blade carries out the zero calibration.

2. The system of claim 1, wherein the perforated measurement assembly comprises a perforated blade or a perforated assembly, wherein the perforated assembly is secured to the blade or the housing.

3. The system of claim 2, wherein the controller is to:

controlling the driver to drive the measuring module to move along the direction close to the light beam, acquiring first position information of the encoder when a light beam shielding signal is generated, and determining first position data of the measuring module;

and controlling the driver to drive the measuring module to continuously move along the direction close to the light beam, controlling the measuring module to move along the opposite direction when the light beam blocking signal disappears, and acquiring second position information of the encoder and determining second position data of the measuring module when the light beam blocking signal is generated again.

4. The system of claim 3, wherein the controller is to:

subtracting the first position data and the second position data and then taking an absolute value to obtain first calibration position data;

acquiring a horizontal distance between a position point of the measuring module corresponding to the first position data and a position point of the through hole corresponding to the second position data;

and subtracting the horizontal distance from the first calibration position data, and then taking an absolute value to obtain the width data of the light beam.

5. The system of claim 4, wherein the controller is to:

and performing zero calibration on the blade according to the width data of the preset proportion.

6. The system of claims 1-5, wherein the size of the through hole is larger than the size of the light beam, the through hole and the light beam being in the same horizontal plane.

7. A method for controlling a multi-leaf raster, comprising:

moving a measuring module in a direction close to a light beam, and determining first position data of the measuring module when a light beam blocking signal is generated;

controlling the measuring module to continuously move along the direction close to the light beam, controlling the measuring module to move along the opposite direction when the light beam blocking signal disappears, and determining second position data of the measuring module when the light beam blocking signal is generated again;

acquiring a horizontal distance between a position point of the measuring module corresponding to the first position data and a position point of the through hole corresponding to the second position data;

determining width data of the light beam according to the first position data, the second position data and the horizontal distance;

and performing zero calibration on the blade according to the width data.

8. The method of claim 7, wherein said zero calibration of the blade based on said width data comprises:

and performing zero calibration on the blade according to the width data of the preset proportion.

9. A multileaf raster control apparatus, comprising:

the first position data determining module is used for moving the measuring module along the direction close to the light beam, and determining first position data of the measuring module when a light beam blocking signal is generated;

the second position data determining module is used for controlling the measuring module to continuously move along the direction close to the light beam, controlling the measuring module to move along the opposite direction when the light beam blocking signal disappears, and determining second position data of the measuring module when the light beam blocking signal is generated again;

a horizontal distance acquisition module for acquiring a horizontal distance between a position point of the measurement module corresponding to the first position data and a position point of the through hole corresponding to the second position data;

a width data determination module for determining width data of the light beam according to the first position data, the second position data and the horizontal distance;

and the zero calibration module is used for performing zero calibration on the blade according to the width data.

10. A storage medium containing computer executable instructions for performing the multi-leaf raster control method of claim 7 or 8 when executed by a computer processor.

Technical Field

The embodiment of the invention relates to the technical field of medical instruments, in particular to a multi-leaf grating control system, a method, a device and a storage medium.

Background

The medical linear accelerator is a large medical device which kills tumor cells by high-energy X rays generated by bombarding a tungsten target by high-speed electron beams to achieve the purpose of treatment. Multi-leaf grating systems (MLC) are key core components of medical electron linear accelerators, and are the basis for implementing various modern treatment modes such as three-dimensional conformal radiotherapy, volume intensity modulated radiotherapy and image-guided radiotherapy.

In the treatment process, the MLC replaces an irregular lead stop block made by hands, and the computer controls the movement of each leaf of the MLC to form an irregular-shaped field required clinically for irradiation. In the process, the manufacturing precision and the control precision of the multi-leaf grating have important influence on the treatment effect. In the prior art, a method of leaf pair collision or an optical coupling switch is adopted to carry out zero calibration on the MLC.

Based on foretell prior art scheme, carry out the zero position calibration through the mode of blade to each other and can cause wearing and tearing to blade or striking subassembly, and because the striking effect, the blade is to having certain gap after the zero position calibration. When the optical coupling switch is used for mechanically calibrating or initializing the MLC, the blades cannot be guaranteed to move to the zero position due to the problems of uneven response width data or light distribution and the like of the optical coupling switch, and gaps may still exist between the blade pairs.

Disclosure of Invention

The invention provides a multi-leaf grating control system, a method, a device and a storage medium, which are used for realizing the accurate positioning of the zero position of a leaf of a multi-leaf grating system.

In a first aspect, an embodiment of the present invention provides a multi-leaf grating control system, including:

the measuring module is used for triggering a light beam shielding signal of the optical coupling switch, wherein the measuring module comprises at least one measuring component with a through hole;

the optical coupling switch comprises a light beam generator and a light beam receiver, wherein the light beam receiver is used for receiving a generated light beam blocking signal;

the encoder is used for generating and recording the position information of the measuring module;

the driver is used for driving the measuring module to move;

the controller, with opto-coupler switch, encoder with the driver communication connection is used for controlling the driver is according to predetermineeing the drive of removing the rule the measuring module removes, and is corresponding, still be used for acquireing the encoder generates measuring module's positional information, and based on positional information is right the blade carries out the zero calibration.

In a second aspect, an embodiment of the present invention further provides a method for controlling a multi-leaf grating, where the method includes:

moving a measuring module in a direction close to a light beam, and determining first position data of the measuring module when a light beam blocking signal is generated;

controlling the measuring module to continuously move along the direction close to the light beam, controlling the measuring module to move along the opposite direction when the light beam blocking signal disappears, and determining second position data of the measuring module when the light beam blocking signal is generated again;

acquiring a horizontal distance between a position point of the measuring module corresponding to the first position data and a position point of the through hole corresponding to the second position data;

determining width data of the light beam according to the first position data, the second position data and the horizontal distance;

and performing zero calibration on the blade according to the width data.

In a third aspect, an embodiment of the present invention further provides a multi-leaf grating control apparatus, where the apparatus includes:

the first position data determining module is used for moving the measuring module along the direction close to the light beam, and determining first position data of the measuring module when a light beam blocking signal is generated;

the second position data determining module is used for controlling the measuring module to continuously move along the direction close to the light beam, controlling the measuring module to move along the opposite direction when the light beam blocking signal disappears, and determining second position data of the measuring module when the light beam blocking signal is generated again;

a horizontal distance acquisition module for acquiring a horizontal distance between a position point of the measurement module corresponding to the first position data and a position point of the through hole corresponding to the second position data;

a width data determination module for determining width data of the light beam according to the first position data, the second position data and the horizontal distance;

and the zero calibration module is used for performing zero calibration on the blade according to the width data.

In a fourth aspect, embodiments of the present invention also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform any of the multi-leaf raster control methods referred to above.

According to the embodiment of the invention, the width data of the light beam is obtained by the measuring module according to the preset moving rule, so that the problem that gaps exist among blades in a multi-blade grating system is solved, and the precision of zero calibration of the blades is improved.

Drawings

Fig. 1 is a schematic structural diagram of a multi-leaf grating control system according to an embodiment of the present invention.

Fig. 2a is a schematic structural diagram of a measurement module according to an embodiment of the present invention.

Fig. 2b is a schematic structural diagram of another measurement module according to an embodiment of the present invention.

Fig. 2c is a schematic diagram of a horizontal distance according to an embodiment of the present invention.

Fig. 3 is a flowchart of a multi-leaf grating control method according to a second embodiment of the present invention.

Fig. 4 is a schematic diagram of a measurement module movement rule according to a second embodiment of the present invention.

Fig. 5 is a schematic diagram of a multi-leaf grating control device according to a third embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.