CN203443904U - Medical device for measuring specific absorption rate of electromagnetic energy - Google Patents
Medical device for measuring specific absorption rate of electromagnetic energy Download PDFInfo
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- CN203443904U CN203443904U CN201320484953.0U CN201320484953U CN203443904U CN 203443904 U CN203443904 U CN 203443904U CN 201320484953 U CN201320484953 U CN 201320484953U CN 203443904 U CN203443904 U CN 203443904U
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 34
- 238000005259 measurement Methods 0.000 claims abstract description 23
- 230000005855 radiation Effects 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 238000007405 data analysis Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 238000000015 thermotherapy Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 206010028980 Neoplasm Diseases 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001959 radiotherapy Methods 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- 238000002560 therapeutic procedure Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001815 biotherapy Methods 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 238000002512 chemotherapy Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 210000000056 organ Anatomy 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model discloses a medical device for measuring the specific absorption rate of electromagnetic energy. A body model similar to a living body is used for measurement. The device comprises a radio frequency source, a radiator, a temperature measurer, a stepper motor and a control processor, wherein the radiator is connected with the radio frequency source, and is used for radiating the body model; the temperature measurer is provided with temperature sensors; the temperature sensors are distributed in the body model, and are used for measuring the temperature data of the body model; the temperature measurer is used for transmitting the temperature data to the control processor; the stepper motor is connected with the temperature sensors, and drives the temperature sensors to move in the body model; the control processor is connected with the radio frequency source, the stepper motor and the temperature measurer respectively, and is used for receiving the temperature data from the temperature measurer, and analytically determining the specific absorption rate of electromagnetic waves of the body model according to the temperature data. According to the device, the temperature sensors are small in size and high in measurement accuracy, and can be easily placed in the body model; the control processor is used for control, so that the device is easy to operate, low in cost and time consumption and high in performance.
Description
Technical field
The utility model relates to a kind of medicine equipment, specifically, relates to a kind of measurement system of specific absorption rate.
Background technology
Thermotherapy is exactly to utilize artificial technology to make the interior temperature of tumour raise to reach a kind of effective methods for the treatment of of therapeutic purposes, and it is one of current large therapy of malignant tumour base therapy five (operation, radiation therapy, chemicals, biological therapy and thermotherapy).Radiation therapy and chemotherapy can be used separately or combine to thermotherapy, because adding the difference of temperature technique and treatment temperature.To the heating means of tumor focus so that the most conventional with electromagnetic wave irradiation technique, what thermotherapy was used clinically is that electromagnetic radiation belongs to Non-ionizing radiation, that is to say the thermal effect of having utilized electromagenetic wave radiation to produce after people, the local temperature that energy is high will be high, vice versa.
Because the various organs of human body are lossy dielectric, so in body, electromagnetic field will generation current, causes absorbing and dissipation electromagnetic energy.In science, conventional specific absorption rate (SAR, Specific Absorption Rate) represents that human body is subject to the rule of energy absorption after electromagnetic radiation.SAR is the electromagnetic power that tissue absorbed or consumed of unit mass, and unit is W/kg(watt/kilogram).In clinical practice, according to the different parts at tumor focus place, in actual therapeutic, can use different radiators (electromagenetic wave radiation antenna).Measure the rule that various radiators are radiated at electromagnetic energy distribution after human body, be design radiator and use one of the most key technology of radiator, yet have at present good technology, be not applied to this.
Current conventional method is to utilize phantom to carry out SAR mensuration, shows the characteristic of this radiator by the distribution characteristics of SAR.Set up an empirical model close with biosome (being phantom), irradiate after phantom, the one, utilize and be placed on the electromagnetic energy survey sensor in body film, directly read the data that the signal of transmission shows on instrument; The 2nd, utilize temperature sensitive infrared camera or responsive to temperature liquid crystal film, by the variation of different colours, carry out the difference of displays temperature, thereby understand the rule that energy absorption distributes.Above-mentioned measuring method is consuming time extremely long, and method one due to radiator from irradiated object very close to, and the volume of electromagnetic energy sensor is very large, is difficult to be placed in phantom; Method two is because thermometric precision is poor, and just for thicker heat distribution rule research, from medical mensuration requirement, also there is a big difference.
Utility model content
The purpose of this utility model is to provide a kind of short, Medical electromagnetic wave energy measurement system of specific absorption rate that measuring accuracy is high consuming time.
To achieve these goals, the technical scheme that the utility model adopts is as follows:
A kind of Medical electromagnetic wave energy measurement system of specific absorption rate, utilize the phantom close with biosome to measure, comprise radio frequency source, radiator, temperature measurer, stepper motor and control processor, described radiator is connected with described radio frequency source and irradiates described phantom, described temperature measurer is provided with temperature sensor, described temperature sensor is distributed in described phantom and measures its temperature data, described temperature measurer is transferred to described control processor by described temperature data, described stepper motor connects described temperature sensor and drives it in described phantom, to move, described control processor respectively with described radio frequency source, described stepper motor is connected with described temperature measurer, described control processor receives the described temperature data that described temperature measurer transmits, according to the electro-magnetic wave absorption ratio of phantom described in described temperature data Analysis deterrmination.
Further, described radio frequency source is solid-state radio frequency source.
Further, described control processor is controlled the power parameter of described radio frequency source output.
Further, the power parameter of described radio frequency source output comprises that its output power size, the time of power stage are, the time interval of power stage.
Further, described radiator irradiates after described phantom, and the electromagnetic wave energy of setting described phantom absorption is shown as the rising of its temperature.
Further, described control processor is according to certain described electromagnetic wave energy a bit absorbing in phantom described in SAR=4.186xCx △ T/t Analysis deterrmination, wherein, the unit of SAR is W/Kg, 4.186 be Joule heat constant, C is the specific heat of described phantom, and △ T is temperature gap before and after described phantom exposure, and t is the time of irradiating.
Further, keep the time of described radiator radiation constant, the difference of the temperature variation that is changed to described phantom exposure front and back of SAR, i.e. SAR=△ T.
Further, described stepper motor drives described temperature sensor traveling priority in described phantom.
Further, described control processor is controlled the distance that described stepper motor drives described temperature sensor to move in described phantom, and records the coordinate position of described temperature sensor.
Further, described control processor is computing machine.
Compared with prior art, the utility model device degree of accuracy is high, with low cost, and performance is good, simple to operate, consuming time short.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model Medical electromagnetic wave energy measurement system of specific absorption rate is described further.
Refer to Fig. 1, the utility model discloses a kind of Medical electromagnetic wave energy measurement system of specific absorption rate, utilize the phantom 100 close with biosome to measure, described Medical electromagnetic wave energy measurement system of specific absorption rate comprises radio frequency source 1, radiator 2, temperature measurer 3, stepper motor 4 and control processor 5.
Described radio frequency source 1 is solid-state radio frequency source, and described solid-state radio frequency source can instantaneous starting, and power stage is stable, without preheating.Certainly, the utility model is not limited to this, in other embodiments, also can be other radio frequency sources.
Described radiator 2 is connected with described solid-state radio frequency source 1 by concentric cable 6, and irradiates described phantom 100.In the present embodiment, described radiator 2 is radiator for thermotherapy, and certainly, the utility model is not limited to this, in other embodiments, also can be other radiators.
Described temperature measurer 3 is provided with temperature sensor 31, and described temperature sensor 31 distributes and is arranged in described phantom 100, for measuring the temperature data of described phantom 100.Described temperature measurer 3 is transferred to described control processor 5 by the described temperature data of described phantom 100.The volume of temperature sensor described in the utility model 31 is very little, and measuring accuracy is high, is easy to be placed in described phantom 100.
Described stepper motor 4 connects described temperature measurer 3 and is arranged at the described temperature sensor 31 in described phantom 100, and drives described temperature sensor 31 at the interior traveling priority of described phantom 100.Certainly, the utility model is not limited to this, and in other embodiments, described stepper motor 4 also can drive described temperature sensor 31 otherwise to move in described phantom 100.
Described control processor 5 is connected with described radio frequency source 1, described stepper motor 4 and described temperature measurer 3 respectively.Described control processor 5 is controlled the power parameter of described radio frequency source 1 output, comprises that the output power size, the time of power stage of described radio frequency source 1 are, the time interval of power stage.Described control processor 5 is controlled described stepper motor 4 and is driven described temperature sensor 31 in the distance of described phantom 100 interior movements, and records the co-ordinate position information of described temperature sensor 31.
Described control processor 5 receives the described temperature data that described temperature measurer 3 transmits, according to the electro-magnetic wave absorption ratio of phantom 100 described in described temperature data Analysis deterrmination.By reading the described temperature data of described temperature sensor 31 measurements that are placed in described body film 100, according to described phantom 100, be subject to the rule of described radiator 2 electromagenetic wave radiations front and back temperature variation, determine the regularity of distribution of described phantom 100 electromagnetic wave absorption energy.In the present embodiment, described control processor 5 is computing machine, and certainly, the utility model is not limited to this, and in other embodiments, described control processor 5 also can be other.
The utility model is set described radiator 2 and is irradiated after described phantom 100, and the electromagnetic wave energy that described phantom 100 absorbs is shown as the rising of described phantom 100 temperature.In described phantom 100, certain described electromagnetic wave energy a bit absorbing shows with following formula table
SAR=4.186xCx△T/t
Wherein, the unit of SAR is W/Kg(watt/kilogram), the 4.186th, Joule heat constant, C is that the specific heat △ T of described phantom 100 is temperature gaps before and after described phantom 100 exposures, t is the time of irradiating.
Specific heat capacity (specific heat capacity) claim again specific heat capacity, is called for short specific heat (specific heat), is the thermal capacity of unit mass material, the absorption while being unit mass object change unit temperature or the interior energy of release.Specific heat capacity means the physical quantity of material thermal property, and logical conventional sign C represents.
If keep the time t of described radiator 2 radiation constant, because specific heat C is also constant at same Integral mold, the difference that is changed to the temperature variation before and after described phantom 100 exposures of SAR, i.e. SAR=△ T so.While using described Medical electromagnetic wave energy measurement system of specific absorption rate of the present utility model to measure, measuring accuracy is high, with low cost, simple to operate.
The utility model Medical electromagnetic wave energy measurement system of specific absorption rate course of work is as follows:
First, start described radio frequency source 1, described radiator 2 irradiates described phantom 100, described temperature sensor 31 is measured the described temperature data of described phantom 100, described temperature measurer 3 is transferred to described control processor 5 by described temperature data, and described control processor 5 is determined the regularity of distribution of described phantom 100 electromagnetic wave absorption energy according to the described temperature data of described phantom 100.
Described control processor 5 bases
SAR=4.186xCx△T/t
Certain described electromagnetic wave energy a bit absorbing in phantom 100 described in Analysis deterrmination,
Wherein, the unit of SAR is W/Kg, the 4.186th, and Joule heat constant, C is the specific heat of described phantom, and △ T is temperature gap before and after described phantom 100 exposures, and t is the time of irradiating.
Keep the time t of described radiator 2 radiation constant, because specific heat C is also constant at same Integral mold, the difference that is changed to the temperature variation before and after described phantom 100 exposures of SAR, i.e. SAR=△ T so.In described phantom 100 certain to be a bit subject to the variation of the SAR before and after described radiator 2 electromagnetic wave irradiations be exactly the difference of its temperature variation.
Then, described stepper motor 4 drives described temperature sensor 31 at the interior traveling priority of described phantom 100, described temperature sensor 31 is measured the described temperature data of the coordinate position of the described phantom 100 after moving, described temperature measurer 3 is transferred to described control processor 5 by described temperature data, and described control processor 5 is according to certain described electromagnetic wave energy a bit absorbing in phantom 100 described in SAR=4.186xCx △ T/t Analysis deterrmination.Described stepper motor 4 drives described temperature sensor 31 in the interior continuous movement of described phantom 100, repeats said process, until measured.
Finally, described control processor 5, according to the described temperature data construction drawing list file of described temperature sensor 31 measurements, is radiated at the rule of described phantom 100 rear electromagnetic energy distribution with radiator described in Analysis deterrmination 2.
The volume of described temperature sensor 31 of the present utility model is very little, and measuring accuracy is high, is easy to be placed in described phantom 100; And by described control processor 5, control, simple to operate, with low cost, consuming time short, superior performance.
More than describe preferred embodiment of the present utility model in detail, should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without creative work.Therefore, all technician in the art according to the utility model design on prior art basis by logic analysis, reasoning or according to the available technical scheme of limited experiment, all should be among the determined protection domain by these claims.
Claims (10)
1. a Medical electromagnetic wave energy measurement system of specific absorption rate, utilize the phantom close with biosome to measure, it is characterized in that: comprise radio frequency source, radiator, temperature measurer, stepper motor and control processor, described radiator is connected with described radio frequency source and irradiates described phantom, described temperature measurer is provided with temperature sensor, described temperature sensor is distributed in described phantom and measures its temperature data, described temperature measurer is transferred to described control processor by described temperature data, described stepper motor connects described temperature sensor and drives it in described phantom, to move, described control processor respectively with described radio frequency source, described stepper motor is connected with described temperature measurer, described control processor receives the described temperature data that described temperature measurer transmits, according to the electro-magnetic wave absorption ratio of phantom described in described temperature data Analysis deterrmination.
2. Medical electromagnetic wave energy measurement system of specific absorption rate as claimed in claim 1, is characterized in that: described radio frequency source is solid-state radio frequency source.
3. Medical electromagnetic wave energy measurement system of specific absorption rate as claimed in claim 2, is characterized in that: described control processor is controlled the power parameter of described radio frequency source output.
4. Medical electromagnetic wave energy measurement system of specific absorption rate as claimed in claim 3, is characterized in that: the power parameter of described radio frequency source output comprises that its output power size, the time of power stage are, the time interval of power stage.
5. Medical electromagnetic wave energy measurement system of specific absorption rate as claimed in claim 1, is characterized in that: described radiator irradiates after described phantom, and the electromagnetic wave energy of setting described phantom absorption is shown as the rising of its temperature.
6. Medical electromagnetic wave energy measurement system of specific absorption rate as claimed in claim 5, is characterized in that:
Described control processor basis
SAR=4.186xCx△T/t
Certain described electromagnetic wave energy a bit absorbing in phantom described in Analysis deterrmination,
Wherein, the unit of SAR is W/Kg, the 4.186th, and Joule heat constant, C is the specific heat of described phantom, and △ T is temperature gap before and after described phantom exposure, and t is the time of irradiating.
7. Medical electromagnetic wave energy measurement system of specific absorption rate as claimed in claim 6, is characterized in that: keep the time of described radiator radiation constant, the difference of the temperature variation that is changed to described phantom exposure front and back of SAR, i.e. SAR=△ T.
8. Medical electromagnetic wave energy measurement system of specific absorption rate as claimed in claim 1, is characterized in that: described stepper motor drives described temperature sensor traveling priority in described phantom.
9. Medical electromagnetic wave energy measurement system of specific absorption rate as claimed in claim 1, it is characterized in that: described control processor is controlled the distance that described stepper motor drives described temperature sensor to move in described phantom, and record the coordinate position of described temperature sensor.
10. Medical electromagnetic wave energy measurement system of specific absorption rate as claimed in claim 1, is characterized in that: described control processor is computing machine.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345068A (en) * | 2013-08-08 | 2015-02-11 | 广州医科大学附属肿瘤医院 | Medical electromagnetic wave energy ratio absorption rate measurement device |
| CN109856463A (en) * | 2019-02-27 | 2019-06-07 | Oppo广东移动通信有限公司 | Test equipment |
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2013
- 2013-08-08 CN CN201320484953.0U patent/CN203443904U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345068A (en) * | 2013-08-08 | 2015-02-11 | 广州医科大学附属肿瘤医院 | Medical electromagnetic wave energy ratio absorption rate measurement device |
| CN109856463A (en) * | 2019-02-27 | 2019-06-07 | Oppo广东移动通信有限公司 | Test equipment |
| CN109856463B (en) * | 2019-02-27 | 2021-07-27 | Oppo广东移动通信有限公司 | Test equipment |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 |