CN102866415A - Dose monitoring system of medical accelerator - Google Patents
Dose monitoring system of medical accelerator Download PDFInfo
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- CN102866415A CN102866415A CN2012103496423A CN201210349642A CN102866415A CN 102866415 A CN102866415 A CN 102866415A CN 2012103496423 A CN2012103496423 A CN 2012103496423A CN 201210349642 A CN201210349642 A CN 201210349642A CN 102866415 A CN102866415 A CN 102866415A
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Abstract
The invention particularly relates to a dose monitoring system of a medical accelerator, which is used for accurate dose of medical accelerator output dose. The dose monitoring system is characterized in that a power supply assembly (5), a scanning tunneling microscope (STM) main control plate (2) and two dose integration plates (3 and 4) are fixedly arranged in a shell (1) and are electrically connected, the shell (1) is a full-aluminum shielding shell, the input ends of the two dose integration plates (3 and 4) are respectively provided with interfaces and are used for connecting and receiving a current signal generated by a dose monitoring ionization chamber, the output ends of the dose integration plates (3 and 4) are respectively connected with the input end of the STM main control plate (2), the output end of the STM main control plate (2) is connected with a communication interface via a controller area network (CAN) bus and is used for data transmission with a main control system of the medical accelerator by utilizing CAN communication, and the commutation interface is arranged on the shell (1). By the dose monitoring system, the influence of external electromagnetic interference and mutual interference prior to internal components on the dose monitoring system is effectively reduced, the dose monitoring accuracy is improved, and the stability of the main control system of the medical accelerator is improved.
Description
Technical field
The present invention is mainly used in the exact dose to the medical accelerator output dose, particularly a kind of dose monitoring system of medical accelerator.
Background technology
Original sosimetric system, the general current signal that just the dose monitoring ionization chamber is produced is converted into digital pulse signal.These digital pulse signals are counted by the master control system of medical accelerator.Like this, count terminal away from signal generating part on the one hand, increased the unreliability of system; On the other hand, the master control system of medical accelerator go out in addition bundle, motion and and the communication of external unit etc. work, so also can affect the real-time accuracy of dose counting.
Summary of the invention
According to above the deficiencies in the prior art, the technical problem to be solved in the present invention is: provide a kind of can be autonomous carry out dose counting, signal disturbance is few, the dose monitoring system of the medical accelerator that stability is high.
The technical solution adopted for the present invention to solve the technical problems is: a kind of dose monitoring system of medical accelerator, comprise shell, it is characterized in that: enclosure is fixedly installed the power supply module of electrical connection, STM master control borad and two blocks of integrating dose meter plates, shell adopts full aluminum screening can, power supply module arranges the attaching plug of connected with outer casing outside, the output terminal of power supply module connects respectively the power end of STM master control borad and two blocks of integrating dose meter plates, the input end of two blocks of integrating dose meter plates arranges respectively interface, be used for connecting the current signal that receives the generation of dose monitoring ionization chamber, its output terminal connects respectively the input end of STM master control borad, the output terminal of STM master control borad connects the communication interface that is arranged on the shell by the CAN bus, be used for utilizing the CAN communication to carry out data transmission with the master control system of medical accelerator.
The present invention adopts full aluminum screening can, and all parts can effectively reduce external electromagnetic interference all in the enclosure like this on the impact of dosage monitoring system.The multiple advanced radiotherapy technologies such as the present invention can support to transfer strong, sliding window, adjustment with volume are strong.The STM master control borad adopts the STM32 system, because the STM32 system itself has compatibility by force, cost is low, stability is high, support the advantages such as CAN2.0, utilize the dosage monitoring system of STM32 microcontroller technological development, can be connected with the master control system of medical accelerator by the CAN communication.
Wherein preferred version is:
Described data transmission refers to that the master control system of medical accelerator sends and presets quantimeter numerical value to the STM master control borad, STM master control borad and integrating dose meter plate directly are converted into actual dose numerical value with the current signal that the dose monitoring ionization chamber produces, and inform the master control system of medical accelerator by the CAN communication, and when dose counting reaches prevalue, initiatively send and stop the bundle order.
Described power supply module comprises modular power source U4-U7 and filter unit U8, attaching plug connects the input end of filter unit U8 by power lead, the output terminal of filter unit U8 is link block power supply U4-U6 respectively, modular power source U4 adopts LB03-10B03, the output terminal of modular power source U4 connects respectively STM master control borad U1 and integrating dose meter plate U3, modular power source U5 adopts LB03-10A15, the output terminal of modular power source U5 connects respectively dosage counter U3, U4, modular power source U6 adopts LB03-10B24, the output terminal of modular power source U6 connects respectively STM master control borad U1 and modular power source U7, power module U7 adopts DC24-500V, and the output terminal of modular power source U7 connects supplies with the ionization chamber power supply.Adopt the modular power source structure, reduce the impacts such as electromagnetic interference (EMI) mutual between original power supply unit, heat radiation, and minimizing takes up room.
Described integrating dose meter plate comprises low drift integrating dose meter circuit, amplifying circuit, clock circuit, the A/D change-over circuit of electrical connection, and the input end of low drift integrating dose meter circuit connects the current signal that receives the generation of dose monitoring ionization chamber by interface.The present invention has used novel integrating dose meter circuit.Traditional integrating dose meter circuit normal operation high-operational amplifier, but the temperature of working environment, humidity and air pressure change can affect the drift value of integrating circuit, cause the sosimetric system precision to reduce.The present invention has used by low drift amplifier and has consisted of the integrating dose meter circuit, and this circuit has the characteristics of high precision, low drift.So both can satisfy the signal conversion accuracy, unsettled impact is put in the drift that has overcome again system, has increased the reliability of sosimetric system.
Described low drift integrating dose meter circuit adopts OP400 integrated transporting discharging chip.
For further integrated functionality, improve the enclosure utilization rate, on above basis, further propose to improve.
Described enclosure also be provided with Signals Transfer Board U13 and-500V sampling plate U14, the output terminal of power supply module connects respectively the power end of STM master control borad U1, Signals Transfer Board U13, ionization chamber power supply and two integrating dose meter plate U2, U3, the input end of Signals Transfer Board U13 connect respectively two integrating dose meter plate U2, U3 and-output terminal of 500V sampling plate U14, the output terminal of Signals Transfer Board U13 connects the input end of STM master control borad U1, and the input end of-500V sampling plate U14 arranges connection ionization chamber-500V signal.
Signals Transfer Board U13 reduces the parts on the STM master control borad U1, reduces the phase mutual interference, further improves accuracy.-500V sampling plate U14 realizes the collection of multiple standard signal in the ionization chamber, further improves the accuracy of dose monitoring.
Described power supply module comprises modular power source U4-U7, U12 and filter unit U8, attaching plug connects the input end of filter unit U8 by power lead, the output terminal of filter unit U8 is link block power supply U4-U6 respectively, U12, modular power source U4 adopts LB03-10B03, the output terminal of modular power source U4 connects respectively Signals Transfer Board U13 and integrating dose meter plate U2, U3, modular power source U5 adopts LB03-10A15, the output terminal of modular power source U5 connect respectively dosage counter U3 and-500V sampling plate U14, modular power source U6 adopts LB03-10B24, the output terminal of modular power source U6 connects respectively Signals Transfer Board U13 and modular power source U7, modular power source U12 adopts LB03-10B12, the output terminal of modular power source U12 connects STM master control borad U1, modular power source U7 adopts DC24-500V, and the output terminal of power module U7 connects supplies with the ionization chamber power supply.
The beneficial effect that the dose monitoring system of medical accelerator of the present invention has is: by integrated setting and optimization, can reach on the whole:
1, on the basis of the master control system burden that alleviates medical accelerator, further improved the accuracy of dose monitoring, the accident of having avoided dosage to transfinite and cause;
2, improved the stability of the master control system of medical accelerator;
3, effectively reduce external electromagnetic interference and the impact of internal component mutually mutual interference before on the dosage monitoring system, further improve the monitoring accuracy;
4, microprocessor adopt to adopt the STM32 system, so that the dosage monitoring system has is compatible strong, cost is low, and stability is high, supports CAN2.0, and the transfer efficiency advantages of higher can the expanded application support be transferred the multiple advanced radiotherapy technologies such as strong, sliding window, adjustment with volume be strong.
Description of drawings
Fig. 1 is the structural representation of embodiments of the invention 1;
Fig. 2 is the electrical schematic diagram of embodiments of the invention 1;
Fig. 3 is the circuit theory diagrams of the low drift integrating dose meter circuit of embodiments of the invention 1;
Fig. 4 is the electrical schematic diagram of embodiments of the invention 2.
Among the figure: 1, shell 2, U1, STM master control borad 3, U2, integrating dose meter plate 4, U3, integrating dose meter plate 5, power supply module U4-U7, U12, modular power source U8, filter unit U9-U11, amplifier U13, Signals Transfer Board U14 ,-500V sampling plate C1, C2, electric capacity R1-R9, resistance D1, diode.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described further:
Embodiment 1:
As shown in Figure 1, shell 1 inside is fixedly installed power supply module 5, STM master control borad 2 and two blocks of integrating dose meter plates 3,4 of electrical connection, and shell 1 adopts full aluminum screening can.
Two blocks of integrating dose meter plates 3,4 input end arrange respectively interface, be used for connecting the current signal that receives the generation of dose monitoring ionization chamber, its output terminal connects respectively the input end of STM master control borad 2, the output terminal of STM master control borad 2 connects the communication interface that is arranged on the shell 1 by the CAN bus, be used for utilizing the CAN communication to carry out data transmission with the master control system of medical accelerator.
The master control system of medical accelerator sends and presets quantimeter numerical value to STM master control borad 2, STM master control borad 2 and integrating dose meter plate 3,4 current signals that directly the dose monitoring ionization chamber produced are converted into actual dose numerical value, and inform the master control system of medical accelerator by the CAN communication, and when dose counting reaches prevalue, initiatively send and stop the bundle order.
As shown in Figure 2, power supply module 5 comprises modular power source U4-U7 and filter unit U8, and attaching plug connects the input end of filter unit U8 by power lead, and the output terminal of filter unit U8 is link block power supply U4-U6 respectively.
Modular power source U4 adopts LB03-10B03, and the output terminal of modular power source U4 connects respectively STM master control borad U1 and integrating dose meter plate U3.Modular power source U5 adopts LB03-10A15, and the output terminal of modular power source U5 connects respectively dosage counter U3, U4.Modular power source U6 adopts LB03-10B24, and the output terminal of modular power source U6 connects respectively STM master control borad U1 and modular power source U7.Power module U7 adopts DC24-500V, and the output terminal of modular power source U7 connects supplies with the ionization chamber power supply.
Integrating dose meter plate 3 comprises low drift integrating dose meter circuit, amplifying circuit, clock circuit, the A/D change-over circuit of electrical connection, and the input end of low drift integrating dose meter circuit connects the current signal that receives the generation of dose monitoring ionization chamber by interface.
As shown in Figure 3, low drift integrating dose meter circuit adopts OP400 integrated transporting discharging chip.Low drift integrating dose meter circuit comprises amplifier U9-U11, the positive of amplifier U9 and inverting input arrange respectively resistance R 2, R3, capacitor C 1 and diode D1 are set between positive and the inverting input, resistance R 1 is set between the inverting input of amplifier U9 and the output terminal, and the output terminal of amplifier U9 connects amplifier U10 by resistance R 6.The normal phase input end of amplifier U10 connects the 15V signal ground by resistance R 5, and resistance R 4 is set between the inverting input of amplifier U10 and the output terminal.The output terminal of amplifier U10 connects amplifier U11 by resistance R 7.The inverting input of amplifier U11 connects the 15V signal ground by resistance R 8, and normal phase input end connects the 15V signal ground by capacitor C 2, and resistance R 9 is set between inverting input and the output terminal.
Some or all of among the amplifier U9-U11 adopts OP400 integrated transporting discharging chip.
Embodiment 2:
As shown in Figure 4, on the basis of embodiment 1, shell 1 inside also be provided with Signals Transfer Board U13 and-500V sampling plate U14, the output terminal of power supply module 5 connects respectively the power end of STM master control borad U1, Signals Transfer Board U13, ionization chamber power supply and two integrating dose meter plate U2, U3, the input end of Signals Transfer Board U13 connect respectively two integrating dose meter plate U2, U3 and-output terminal of 500V sampling plate U14, the output terminal of Signals Transfer Board U13 connects the input end of STM master control borad U1, and the input end of 500V sampling plate U14 arranges connection ionization chamber-500V signal.
Principle of work and use procedure:
During work, first by the master control system of medical accelerator, utilize the CAN communication to send and preset quantimeter numerical value to STM master control borad U1.After the dosage monitoring system receives and presets quantimeter numerical value, start dose counting, send and allow out the bundle order.Dose monitoring system directly is converted into actual dose numerical value with the current signal that the dose monitoring ionization chamber produces, and informs the master control system of medical accelerator by the CAN communication, and initiatively sends when dose counting reaches prevalue and stop the bundle order.
Experiment effect:
By above setting, atmospheric pressure, humiture are greatly reduced the impact of sosimetric system, and the impact of atmospheric pressure and humiture can be ignored in normal operation circumstances.The repeatability of sosimetric system brings up to 0.3% from 0.7%.
Claims (7)
1. the dose monitoring system of a medical accelerator comprises shell (1), it is characterized in that: shell (1) inside is fixedly installed power supply module (5), STM master control borad (2) and two blocks of integrating dose meter plates (3,4) of electrical connection,
Shell (1) adopts full aluminum screening can,
Power supply module (5) arranges the attaching plug of connected with outer casing outside, and the output terminal of power supply module (5) connects respectively the power end of STM master control borad (2) and two blocks of integrating dose meter plates (3,4),
The input end of two blocks of integrating dose meter plates (3,4) arranges respectively interface, is used for connecting receiving the current signal that the dose monitoring ionization chamber produces, and its output terminal connects respectively the input end of STM master control borad (2),
The output terminal of STM master control borad (2) connects the communication interface that is arranged on the shell (1) by the CAN bus, be used for utilizing the CAN communication to carry out data transmission with the master control system of medical accelerator.
2. the dose monitoring system of medical accelerator according to claim 1, it is characterized in that: described data transmission refers to that the master control system of medical accelerator sends and presets quantimeter numerical value to STM master control borad (2), STM master control borad (2) and integrating dose meter plate (3,4) directly are converted into actual dose numerical value with the current signal that the dose monitoring ionization chamber produces, and inform the master control system of medical accelerator by the CAN communication, and when dose counting reaches prevalue, initiatively send and stop the bundle order.
3. the dose monitoring system of medical accelerator according to claim 1, it is characterized in that: described power supply module (5) comprises modular power source U4-U7 and filter unit U8, attaching plug connects the input end of filter unit U8 by power lead, the output terminal of filter unit U8 is link block power supply U4-U6 respectively, modular power source U4 adopts LB03-10B03, the output terminal of modular power source U4 connects respectively STM master control borad U1 and integrating dose meter plate U3, modular power source U5 adopts LB03-10A15, the output terminal of modular power source U5 connects respectively dosage counter U3, U4, modular power source U6 adopts LB03-10B24, the output terminal of modular power source U6 connects respectively STM master control borad U1 and modular power source U7, power module U7 adopts DC24-500V, and the output terminal of modular power source U7 connects supplies with the ionization chamber power supply.
4. the dose monitoring system of medical accelerator according to claim 1, it is characterized in that: described integrating dose meter plate (3) comprises low drift integrating dose meter circuit, amplifying circuit, clock circuit, the A/D change-over circuit of electrical connection, and the input end of low drift integrating dose meter circuit connects the current signal that receives the generation of dose monitoring ionization chamber by interface.
5. the dose monitoring system of medical accelerator according to claim 4 is characterized in that: described low drift integrating dose meter circuit employing OP400 integrated transporting discharging chip.
6. the dose monitoring system of medical accelerator according to claim 1, it is characterized in that: described shell (1) inside also be provided with Signals Transfer Board U13 and-500V sampling plate U14, the output terminal of power supply module (5) connects respectively the power end of STM master control borad U1, Signals Transfer Board U13, ionization chamber power supply and two integrating dose meter plate U2, U3
The input end of Signals Transfer Board U13 connect respectively two integrating dose meter plate U2, U3 and-output terminal of 500V sampling plate U14, the output terminal of Signals Transfer Board U13 connects the input end of STM master control borad U1,
The input end of 500V sampling plate U14 arranges connection ionization chamber-500V signal.
7. the dose monitoring system of medical accelerator according to claim 6, it is characterized in that: described power supply module (5) comprises modular power source U4-U7, U12 and filter unit U8, attaching plug connects the input end of filter unit U8 by power lead, the output terminal of filter unit U8 is link block power supply U4-U6 respectively, U12, modular power source U4 adopts LB03-10B03, the output terminal of modular power source U4 connects respectively Signals Transfer Board U13 and integrating dose meter plate U2, U3, modular power source U5 adopts LB03-10A15, the output terminal of modular power source U5 connect respectively dosage counter U3 and-500V sampling plate U14, modular power source U6 adopts LB03-10B24, the output terminal of modular power source U6 connects respectively Signals Transfer Board U13 and modular power source U7, modular power source U12 adopts LB03-10B12, the output terminal of modular power source U12 connects STM master control borad U1, modular power source U7 adopts DC24-500V, and the output terminal of power module U7 connects supplies with the ionization chamber power supply.
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| CN201210349642.3A CN102866415B (en) | 2012-07-24 | 2012-09-19 | Dose monitoring system of medical accelerator |
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| CN201220360478 | 2012-07-24 | ||
| CN2012203604781 | 2012-07-24 | ||
| CN201220360478.1 | 2012-07-24 | ||
| CN201210349642.3A CN102866415B (en) | 2012-07-24 | 2012-09-19 | Dose monitoring system of medical accelerator |
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| CN201210349642.3A Active CN102866415B (en) | 2012-07-24 | 2012-09-19 | Dose monitoring system of medical accelerator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103809493A (en) * | 2014-02-25 | 2014-05-21 | 山东新华医疗器械股份有限公司 | Dose output control system of medical accelerator |
| CN104833997A (en) * | 2015-04-30 | 2015-08-12 | 陈立新 | Dosimeter used for detecting rays of medical electron linear accelerator |
| CN108008435A (en) * | 2017-11-27 | 2018-05-08 | 上海联影医疗科技有限公司 | The dose monitoring system and observation circuit of medical accelerator |
| CN110727010A (en) * | 2019-09-25 | 2020-01-24 | 上海联影医疗科技有限公司 | Dose monitoring system and method for linear accelerator |
| CN110992661A (en) * | 2019-11-12 | 2020-04-10 | 中国核电工程有限公司 | Communication method of electronic dosimeter, electronic dosimeter and dosimeter reader |
| CN112370667A (en) * | 2020-11-23 | 2021-02-19 | 山东新华医疗器械股份有限公司 | Medical accelerator upper computer and dosage system |
| CN116390326A (en) * | 2023-03-28 | 2023-07-04 | 北京机械工业自动化研究所有限公司 | Main control box of X-band light accelerator |
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| WO2017151662A1 (en) * | 2016-03-02 | 2017-09-08 | Viewray Technologies, Inc. | Particle therapy with magnetic resonance imaging |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809493A (en) * | 2014-02-25 | 2014-05-21 | 山东新华医疗器械股份有限公司 | Dose output control system of medical accelerator |
| CN104833997A (en) * | 2015-04-30 | 2015-08-12 | 陈立新 | Dosimeter used for detecting rays of medical electron linear accelerator |
| CN108008435A (en) * | 2017-11-27 | 2018-05-08 | 上海联影医疗科技有限公司 | The dose monitoring system and observation circuit of medical accelerator |
| CN108008435B (en) * | 2017-11-27 | 2020-06-19 | 上海联影医疗科技有限公司 | Dosage monitoring system and monitoring circuit of medical accelerator |
| CN110727010A (en) * | 2019-09-25 | 2020-01-24 | 上海联影医疗科技有限公司 | Dose monitoring system and method for linear accelerator |
| CN110727010B (en) * | 2019-09-25 | 2021-10-22 | 上海联影医疗科技股份有限公司 | Dose monitoring system and method for linear accelerator |
| CN110992661A (en) * | 2019-11-12 | 2020-04-10 | 中国核电工程有限公司 | Communication method of electronic dosimeter, electronic dosimeter and dosimeter reader |
| CN110992661B (en) * | 2019-11-12 | 2021-04-02 | 中国核电工程有限公司 | Communication method of electronic dosimeter, electronic dosimeter and dosimeter reader |
| CN112370667A (en) * | 2020-11-23 | 2021-02-19 | 山东新华医疗器械股份有限公司 | Medical accelerator upper computer and dosage system |
| CN116390326A (en) * | 2023-03-28 | 2023-07-04 | 北京机械工业自动化研究所有限公司 | Main control box of X-band light accelerator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN202956489U (en) | 2013-05-29 |
| CN102866415B (en) | 2015-04-08 |
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