CN109323855A - Based on the polynary beam limiting device mechanical test device of the radiotherapy of light curtain - Google Patents
Based on the polynary beam limiting device mechanical test device of the radiotherapy of light curtain Download PDFInfo
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- CN109323855A CN109323855A CN201811331834.5A CN201811331834A CN109323855A CN 109323855 A CN109323855 A CN 109323855A CN 201811331834 A CN201811331834 A CN 201811331834A CN 109323855 A CN109323855 A CN 109323855A
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- China
- Prior art keywords
- polynary
- photoreceiver
- blade
- beam limiting
- limiting device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Radiation-Therapy Devices (AREA)
Abstract
The present invention relates to a kind of based on the polynary beam limiting device mechanical test device of the radiotherapy of light curtain, belongs to medical radiotherapy equipment technical field.Including source of parallel light transmitter, photoreceiver, bindiny mechanism, polynary beam limiting device and data transmission set.Bindiny mechanism one end is fixed with parallel light source generator, and the other end installs photoreceiver, to guarantee that the parallel optical screen released by source of parallel light transmitter can be acquired by photoreceiver completely.Polynary beam limiting device is between source of parallel light transmitter and photoreceiver, blade side to be measured is parallel with collimated monochromatic ligth curtain, parallel optical screen is acquired after being blocked by vane end faces to be measured by photoreceiver, is spread out of by transmission device, for calculating the mechanical performance of polynary beam limiting device.Apparatus of the present invention allow non-measured blade arbitrarily to move measuring blade to be measured simultaneously, make measuring state and actual working state as close possible to and having that accuracy is high, easy to operate, the low feature of cost of implementation easy to use.
Description
Technical field
The present invention relates to a kind of based on the polynary beam limiting device mechanical test device of the radiotherapy of light curtain, belongs to doctor
With radiotherapy equipment technical field.
Background technique
Multi-leaf optical grating is the important mechanical part in modern medicine radiotherapy equipment in linear accelerating colimated light system, mainly
For the conformal of cancer target area and adjust strong.With the development of radiation therapy technology, the mechanical performance of polynary beam limiting device is to treatment
The influence that plan executes precision is more and more important.
About the test method of polynary beam limiting device mechanical performance, method both domestic and external has dosage Film Dosimeter, planar detector
The methods of device Array Method, electronic portal imaging device EPID, these methods are all to speculate that polynary limit is got one's things ready by field size dosage distribution
The mechanical performance set not is the direct measurement to leaf position, and all not in rack rotation and blade motion process
Mechanical performance measure.
Summary of the invention
It is filled the purpose of the present invention is to propose to a kind of based on the polynary beam limiting device mechanical test of the radiotherapy of light curtain
It sets, the width of the parallel rays received by photoreceiver obtains the position of blade and corresponding moment, is calculated polynary
The mechanical performance parameter of beam limiting device.
It is proposed by the present invention based on the polynary beam limiting device mechanical test device of the radiotherapy of light curtain, comprising: it is more
Leaf grating, source of parallel light transmitter, photoreceiver, bindiny mechanism and data transmission set；The source of parallel light transmitter
It is co-axially mounted with photoreceiver by bindiny mechanism；The multi-leaf optical grating includes driving device, blade guide housing and blade,
Driving device and blade guide housing are co-axially mounted, the installation axle and source of parallel light transmitter and light of driving device and blade guide housing
The installation axle of quick receiver is mutually perpendicular to, and blade to be tested is after the release of blade guide housing in source of parallel light transmitter and photosensitive
Under parallel optical screen among receiver；Data transmission set is fixed on photoreceiver.
It is proposed by the present invention based on the radiotherapy of light curtain polynary beam limiting device mechanical test device, advantage
It is:
The present invention using light curtain to polynary beam limiting device carry out mechanical performance direct measurement, simultaneously because blade side with
The parallel disposing way of plane where light curtain, can permit non-measured blade and arbitrarily moves, make measuring state and real work shape
State is as close possible to account in range the influence of polynary beam limiting device mechanical performance adjacent blades movement.Together
When measuring system accuracy it is high, easy to operate, significant advantage easy to use, while having cost of implementation low.
Detailed description of the invention
Fig. 1 is proposed by the present invention based on the radiotherapy of the light curtain structure of polynary beam limiting device mechanical test device
Schematic diagram.
Fig. 2 is the schematic shapes of blade.
In Fig. 1,1 is photoreceiver, and 2 be parallel optical screen, and 3 be bindiny mechanism, and 4 be source of parallel light transmitter, and 5 be to be measured
Blade is tried, 6 be driving device, and 7 be blade guide housing, and 8 be data transmission set.
Specific embodiment
It is proposed by the present invention based on the polynary beam limiting device mechanical test device of the radiotherapy of light curtain, structure is such as
Shown in Fig. 1, comprising: multi-leaf optical grating, source of parallel light transmitter 4, photoreceiver 1, bindiny mechanism 3 and data transmission set 8.It is flat
Line light source transmitter 4 and photoreceiver 1 are co-axially mounted by bindiny mechanism 3.Multi-leaf optical grating includes driving device 6, Leaf Conductance
To frame 7 and blade, driving device 6 and blade guide housing 7 are co-axially mounted, the installation axle of driving device 6 and blade guide housing 7 and flat
The installation axle of line light source transmitter 4 and photoreceiver 1 is mutually perpendicular to, and blade 5 to be tested is in after the release of blade guide housing 7
Under parallel optical screen 2 among source of parallel light transmitter and photoreceiver；Data transmission set 8 is fixed on photoreceiver 1.
The structure of blade is as shown in Figure 2.
The testing principle of polynary beam limiting device blade mechanism performance is the displacement of blade and the width that parallel optical screen is blocked
It spends identical.To by the mechanical performance index for calculating available polynary beam limiting device.Pass through polynary beam limiting device blade
The effect of blocking, photoreceiver can only receive the parallel optical screen not being blocked.By receiving the width of parallel optical screen, pass through
Calculate the position that can directly obtain blade.Position based on blade and its it is corresponding at the time of, tracking accuracy, fixed can be calculated
The polynary beam limiting device mechanical performance index such as position precision, repetitive positioning accuracy.
It is proposed by the present invention based on the polynary beam limiting device mechanical test device of the radiotherapy of light curtain, for radiating
The evaluation of polynary beam limiting device mechanical performance in treating, light source emitter therein are used to emitting parallel light curtain.Source of parallel light hair
The light source type of raw device can be monochromatic light, be also possible to polychromatic light.In this example, using green light source come emitting parallel light
Curtain.Meanwhile in order to guarantee the position within the scope of the blade total travel of detection.The height and the width of light curtain are set as 0.5mm
With 80mm.Photoreceiver therein, for detecting the width of parallel optical screen.Photoreceiver receives the precision of light curtain width
It is directly proportional to the number of photosensitive sensor in unit sizes.In order to meet the mechanical performance detection accuracy need of high speed multi-leaf optical grating
It asks, the size of photosensitive sensor should be sensed less than 4 μm, in one embodiment of the invention using 2.5 μm of CMOS
Device is as sensor.Simultaneously in order to guarantee the total travel detection of blade to be measured, the sizes of light sensor arrays be 1mm ×
82mm.Compared to the size of 0.5mm × 80mm of parallel optical screen, extra size is stayed for the error generated in equipment process
Some surpluses.For connecting source of parallel light transmitter and photoreceiver, the installation of bindiny mechanism one end is flat for bindiny mechanism therein
Line light source transmitter, the other end install photoreceiver, it is ensured that the opposite position between source of parallel light transmitter and photoreceiver
It sets, the parallel optical screen that source of parallel light transmitter is issued is received by photoreceiver completely.Connection structure can along hang down
The translation of prismatic blade side surface direction, and adjustable angle.When in use, mobile adjusting connection mechanism is needed, and adjusts its angle, is made
Blade side to be tested and parallel optical screen row, make the optical path of vane end faces partial occlusion parallel optical screen.Polynary limit therein is got one's things ready
It sets, for the test object of the system, polynary beam limiting device, including blade guide housing, blade (including blade to be tested), driving are set
It is standby.Polynary beam limiting device is placed between source of parallel light transmitter and photoreceiver.And blade side to be measured and parallel optical screen
Row.The optical path of vane end faces partial occlusion parallel optical screen.This modes of emplacement may be implemented measuring blade to be measured while allowing
Non-measured blade arbitrarily moves, make measuring state and actual working state as close possible to.Data transmission set and light therein
Quick receiver is connected, width and sampling instant the information outflow of the parallel optical screen for receiving photoreceiver.With after an action of the bowels
It is continuous to calculate.
It is proposed by the present invention based on the polynary beam limiting device mechanical test device of the radiotherapy of light curtain, it is worked
Journey is as follows:
It issues and instructs to the driving equipment of polynary beam limiting device, control polynary beam limiting device blade and transported according to AD HOC
It is dynamic, while controlling remaining non-measured blade free movement so that measuring state and actual working state as close possible to.It is photosensitive to connect
It receives device and acquires the width corresponding moment of each moment parallel rays, and data transmission set is spread out of.According to acquisition
The numerical value such as tracking accuracy, positioning accuracy, repetitive positioning accuracy, maximum speed are calculated in data information.To polynary speed limit
The mechanical performance of device makes assessment.
Claims (1)
1. a kind of polynary beam limiting device mechanical performance detection system of radiotherapy, which is characterized in that the detection system includes: more
Leaf grating, source of parallel light transmitter, photoreceiver, bindiny mechanism and data transmission set；The source of parallel light transmitter
It is co-axially mounted with photoreceiver by bindiny mechanism；The multi-leaf optical grating includes driving device, blade guide housing and blade,
Driving device and blade guide housing are co-axially mounted, the installation axle and source of parallel light transmitter and light of driving device and blade guide housing
The installation axle of quick receiver is mutually perpendicular to, and blade to be tested is after the release of blade guide housing in source of parallel light transmitter and photosensitive
Under parallel optical screen among receiver；Data transmission set is fixed on photoreceiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811331834.5A CN109323855A (en) | 2018-11-09 | 2018-11-09 | Based on the polynary beam limiting device mechanical test device of the radiotherapy of light curtain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811331834.5A CN109323855A (en) | 2018-11-09 | 2018-11-09 | Based on the polynary beam limiting device mechanical test device of the radiotherapy of light curtain |
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| Publication Number | Publication Date |
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| CN109323855A true CN109323855A (en) | 2019-02-12 |
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| CN201811331834.5A Pending CN109323855A (en) | 2018-11-09 | 2018-11-09 | Based on the polynary beam limiting device mechanical test device of the radiotherapy of light curtain |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003925A (en) * | 2010-10-20 | 2011-04-06 | 成都奇林科技有限责任公司 | Motion position precision measuring device of multi-blade grating blades |
| CN104458776A (en) * | 2014-12-30 | 2015-03-25 | 合肥美亚光电技术股份有限公司 | X-ray impurity detecting device and X-ray impurity detecting method |
| CN106345072A (en) * | 2016-09-21 | 2017-01-25 | 山东师范大学 | Real-time detecting method and system for multi-leaf collimator blade position of linear accelerator |
| CN207186926U (en) * | 2017-01-05 | 2018-04-06 | 西安大医数码技术有限公司 | Leaf position monitoring device, multi-leaf optical grating and the therapeutic equipment of a kind of multi-leaf optical grating |
| CN207445358U (en) * | 2016-12-21 | 2018-06-05 | 西安大医数码技术有限公司 | A kind of multi-diaphragm collimator blade locking device |
-
2018
- 2018-11-09 CN CN201811331834.5A patent/CN109323855A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003925A (en) * | 2010-10-20 | 2011-04-06 | 成都奇林科技有限责任公司 | Motion position precision measuring device of multi-blade grating blades |
| CN104458776A (en) * | 2014-12-30 | 2015-03-25 | 合肥美亚光电技术股份有限公司 | X-ray impurity detecting device and X-ray impurity detecting method |
| CN106345072A (en) * | 2016-09-21 | 2017-01-25 | 山东师范大学 | Real-time detecting method and system for multi-leaf collimator blade position of linear accelerator |
| CN207445358U (en) * | 2016-12-21 | 2018-06-05 | 西安大医数码技术有限公司 | A kind of multi-diaphragm collimator blade locking device |
| CN207186926U (en) * | 2017-01-05 | 2018-04-06 | 西安大医数码技术有限公司 | Leaf position monitoring device, multi-leaf optical grating and the therapeutic equipment of a kind of multi-leaf optical grating |
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Application publication date: 20190212 |