CN103860187B - Cooling system of positron emission tomography scanner - Google Patents
Cooling system of positron emission tomography scanner Download PDFInfo
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- CN103860187B CN103860187B CN201210529729.9A CN201210529729A CN103860187B CN 103860187 B CN103860187 B CN 103860187B CN 201210529729 A CN201210529729 A CN 201210529729A CN 103860187 B CN103860187 B CN 103860187B
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Abstract
The invention discloses a cooling system of a positron emission tomography scanner. The positron emission tomography scanner comprises a peripheral electronics plate, a detector module and a bottom electronics plate; the cooling system comprises a cooling device, a peripheral cooling air channel, an inner chamber cooling air channel and a bottom cooling air channel; the inner chamber cooling air channel is a chamber body and comprises an air inlet channel and an air return channel; the peripheral electronics plate is located in the peripheral cooling air channel; the detector module is located between the air inlet channel and the air return channel; the bottom electronics plate is located in the bottom cooling air channel; the cooling device is used for conveying cooled air flow to the peripheral cooling air channel, the inner chamber cooling air channel and the bottom cooling air channel so as to cool the peripheral electronics plate, the detector module and the bottom electronics plate. According to the cooling system of the positron emission tomography scanner, ventilation cooling is performed on the peripheral electronics plate and the bottom electronics plate, the low-temperature and stable inner chamber cooling air channel is provided for the detector module, and accordingly the stability and the imaging quality of the system are improved.
Description
Technical field
The present invention relates to Medical Instruments technical field, particularly relate to a kind of cooling system of PET (positron emission tomography) scanner.
Background technology
PET (positron emission tomography) scanner plays huge effect in medical diagnosis now.PET (positron emission tomography) scanner utilizes the human metabolites such as positron radionuclide labelled glucose as developer, reflects its metabolic alterations, thus be the clinical biological metabolism information providing disease by the picked-up of detector detection focus to developer.Its image-forming principle is: the free electron of a positron in tissue launched during positron radionuclide decay is combined to be buried in oblivion, and be converted into both direction contrary, energy is respectively the γ photon of 511KeV.When the scintillation probe that subtend is arranged in emitter both sides receives this pair γ photon simultaneously, just determine this nucleic and be positioned on the line (be called and meet line, LOR) of two probes, this detection mode meets detection exactly.By the algorithm for reconstructing of computer, image reconstruction is carried out to the sensing point carrying spatial positional information that all directions detect, obtain the distribution in nucleic space in vivo, just generate the image with positron radionuclide information.In order to obtain steady and audible scanogram, under the detector in PET (positron emission tomography) scanner and electronics need to be operated in a suitable and stable temperature environment.Temperature rising significantly can increase system noise, and temperature fluctuation can cause system drifting, thus reduces picture quality.Therefore cooling system is one of critical component ensureing PET (positron emission tomography) scanner quality.What generally adopt now is common ventilating and cooling, namely the air in direct suction scanning room takes away the heat of machine intimate, this type of cooling is directly by the impact of scanning room temperature fluctuation, be difficult to the stable of keeping system operating temperature, simultaneously easily bring the dust impurity in environment into detector, affect imaging effect and system stability.
Summary of the invention
The present invention proposes a kind of cooling system of PET (positron emission tomography) scanner, described PET (positron emission tomography) scanner comprises ancillary electronics plate, detector module and bottom electronics plate, and described cooling system comprises:
Peripheral cooling airway, described ancillary electronics plate is arranged in described peripheral cooling airway;
Inner chamber cooling airway, it is cavity, comprises air intake passage and return air channel, and described detector module is between described air intake passage and return air channel;
Bottom coohng air flue, described bottom electronics plate is arranged in described bottom coohng air flue; And
Chiller, for described peripheral cooling airway, inner chamber cooling airway and bottom coohng air flue conveying cooling blast, to cool described ancillary electronics plate, detector module and bottom electronics plate.
Wherein, the air intake vent place of described peripheral cooling airway and the air intake vent place of described bottom coohng air flue are provided with wind deflector; The air-flow of the described peripheral blower fan conveying of described wind deflector shunting is in described peripheral cooling airway and bottom coohng air flue.
Wherein, air-flow is blown into from the air intake vent of described peripheral cooling airway, through and flow out from the air outlet of described peripheral cooling airway after cooling described ancillary electronics plate.
Wherein, the air-flow in described inner chamber cooling airway, after cooling, is flow through by described air intake passage and cools described detector module, and described air-flow cools again through described return air channel backflow again.
Wherein, air-flow is blown into from the air intake vent of described bottom coohng air flue, through and air outlet from described bottom coohng air flue after cooling described bottom electronics plate flow out.
Wherein, the both sides of described detector module are equipped with passage; Described passage makes described cooling blast evenly by described detector module.
Wherein, described chiller comprises:
Peripheral blower fan, it is arranged in described bottom coohng air flue; Described peripheral blower fan carries cooling blast to described peripheral cooling airway and described bottom coohng air flue simultaneously, and takes away the heat that condenser distributes;
Inner chamber blower fan, it is arranged in described inner chamber cooling airway; Air-flow in described inner chamber cooling airway is driven by described inner chamber blower fan;
Compressor power, it is connected with described peripheral blower fan and inner chamber fan parallel-connection, and is connected in series with compressor drive, compressor, for powering to described compressor drive, compressor;
Described compressor drive is for driving and regulating the working speed of described compressor;
Described compressor rushes geat successively with condenser, high pressure, expansion valve, vaporizer, low pressure are rushed geat and is communicated with and forms loop; Described compressor improves the pressure of the cold-producing medium of gaseous state, and by the refrigerant transfer of described gaseous state to described condenser;
Described condenser is right against described peripheral blower fan and is arranged in described bottom coohng air flue; The cold-producing medium flowing through the gaseous state of described condenser liquefies by air-cooled impact of described peripheral blower fan, forms liquid cold-producing medium and is transferred to described expansion valve;
Described expansion valve changes the cold-producing medium of described liquid state into vaporific cold-producing medium, and by the refrigerant transfer of described mist to described vaporizer;
Described vaporizer is right against described inner chamber blower fan and is arranged in described inner chamber cooling airway; Described vaporific flow of refrigerant transfers the cold-producing medium of gaseous state to through described vaporizer, the heat in the inner chamber air-flow that the refrigerant suction of described gaseous state is driven by described inner chamber blower fan, the cold-producing medium of described gaseous state is fed back to described compressor afterwards, so circulates.
Wherein, described chiller comprises further: temperature controller and at least one temperature probe;
Described temperature controller is connected with described compressor drive, peripheral blower fan and inner chamber blower fan; Described temperature controller sends compressor control signal to described compressor drive, controls the working speed of described compressor; Described temperature controller regulates the power of described peripheral blower fan and inner chamber blower fan;
Described temperature probe measures the temperature of described inner chamber cooling airway and/or described vaporizer, measurement result is sent in described temperature controller.
Wherein, described chiller comprises device for drying and filtering further; Described device for drying and filtering is arranged on described high pressure and rushes between geat and expansion valve, for the moisture in the cold-producing medium of filtering liquid state and impurity.
Wherein, described inner chamber blower fan drives the air-flow in described inner chamber cooling airway to flow through described vaporizer, and described vaporizer cools described air-flow.
The present invention is on the basis ensureing ancillary electronics plate and bottom electronics plate ventilating and cooling, for detector module creates the lower and very stable inner chamber environment of a temperature, avoid detection noise that detector module causes because of heat accumulation and the system drifting that temperature fluctuation causes, improve stability and the image quality of system.
The present invention is provided with inner chamber cooling airway, peripheral cooling airway.Common ventilation cooling done by peripheral cooling airway instrument, and inner chamber cooling airway is equipped with special refrigeration system, obtains higher temperature control precision, reduce the capacity requirement to refrigeration system simultaneously in the little thermally charged environment of inner chamber.
The inner chamber cooling airway closed circulation that the present invention is arranged, had both been conducive to the stable of inner chamber temperature, also can have prevented external dust contaminating impurity detector.
Peripheral cooling airway of the present invention and bottom coohng air flue share a peripheral blower fan, reduce cost of the present invention and complexity.
Accompanying drawing explanation
Fig. 1 shows the profile of PET (positron emission tomography) scanner according to an embodiment of the invention.
Fig. 2 shows the schematic diagram of the inner chamber cooling airway of cooling system according to an embodiment of the invention.
Fig. 3 shows the structural representation of the chiller of cooling system according to an embodiment of the invention.
Detailed description of the invention
In conjunction with following specific embodiments and the drawings, the present invention is described in further detail.Implement process of the present invention, condition, experimental technique etc., except the following content mentioned specially, be universal knowledege and the common practise of this area, the present invention is not particularly limited content.
1-chiller, 2-diaphragm structure, 3-PET (positron emission tomography) scanner, the peripheral blower fan of 10-, 11-inner chamber blower fan, 12-condenser, 13-high pressure rushes geat, 14-device for drying and filtering, 15-expansion apparatus, 16-vaporizer, 17-low pressure rushes geat, 18-compressor, 181-compressor power, 182-compressor drive, the peripheral cooling airway of 20-, 21-bottom coohng air flue, 22-inner chamber cooling airway, 23-air intake passage, 24-return air channel, 31-ancillary electronics plate, 32-detector module, electronics plate bottom 33-, 34-wind deflector, 35-air vent, 36-air filter, 41-temperature controller, 42-temperature probe.
Wherein, chiller 1 comprises peripheral blower fan 10 and inner chamber blower fan 11.Peripheral blower fan 10 is arranged in bottom coohng air flue 21.Peripheral blower fan 10 simultaneously to the periphery cooling airway 20 and bottom coohng air flue 21 delivery air cool ancillary electronics plate 31 and bottom electronics plate 33.Inner chamber blower fan 11 is arranged in inner chamber cooling airway 22.Air-flow in inner chamber cooling airway 22 is driven by inner chamber blower fan 11, with cooled detector module 32.Wherein, ancillary electronics plate 31 is detector module signal-processing board, for the pre-process of detector module signal.Detector module 32 is γ photon detector, for detecting γ photon.Bottom electronics plate 33 is detector system disposable plates, for machine system signal processing.
Fig. 1 shows the profile of the PET (positron emission tomography) scanner 3 of one embodiment of the invention.PET (positron emission tomography) scanner 3 comprises ancillary electronics plate 31, detector module 32, bottom electronics plate 33.Cooling system comprises three gas channels: peripheral cooling airway 20, inner chamber cooling airway 22 and bottom coohng air flue 21.Wherein the detector rings (PET Ring) of PET (positron emission tomography) scanner is divided into inner chamber cooling airway 22 and peripheral cooling airway 20 by diaphragm structure 2.Inner chamber air flue provides cooling blast for installing detector module 32 wherein.Peripheral airway provides cooling blast for installing ancillary electronics plate 31 wherein.Bottom coohng air flue 21 is positioned at the below of peripheral cooling airway 20 and inner chamber cooling airway 22, and bottom coohng air flue 21 provides cooling blast for installing parts such as bottom electronics plate 33 grade wherein.Cooling system also comprises chiller 1.Chiller 1 to the periphery cooling airway 20, bottom coohng air flue 21 and inner chamber cooling airway provides cooling blast, for cooling ancillary electronics plate 31, detector module 32 and bottom electronics plate 33.
Peripheral cooling airway 20 shares a peripheral blower fan 10 with bottom coohng air flue 21, and peripheral blower fan 10 is arranged in bottom coohng air flue 21, and two gas channel allocation of the amount of airs are completed by wind deflector 34.Peripheral blower fan 10 sucks air from the space outerpace at PET (positron emission tomography) scanner 3 place, and air filter 36 is equipped with in this suction side.
Fig. 2 display be the schematic diagram of inner chamber cooling airway 22.Inner chamber cooling airway 22 is closed cavities, and inner chamber blower fan 11 realizes inner chamber cooling airway 22 inner air and circulates, and the heat of inner chamber air flue is taken out of by vaporizer 16, and is dispelled the heat in bottom coohng air flue 21 by condenser 12.Inner chamber cooling airway 22 comprises air intake passage 23 and return air channel 24, and the detector module 32 of PET (positron emission tomography) scanner 3 is between air intake passage 23 and return air channel 24.In inner chamber cooling airway 22, the both sides of detector module 32 are distributed with air vent 35 equably, to ensure the uniform cooling blast that the detector module 32 of diverse location is subject to.
Fig. 3 display be the schematic diagram of chiller.Cooling system contains chiller 1, to ensure ancillary electronics plate 31, under detector module 32 and bottom electronics plate 33 are operated in lower and stable temperature.Chiller 1 also comprises compressor 18, condenser 12, expansion valve 15, vaporizer 16, peripheral blower fan 10, inner chamber blower fan 11, compressor power 181 and compressor drive 182.Wherein, compressor power 181 is connected in parallel with peripheral blower fan 10 and inner chamber blower fan 11, and is connected in series with compressor drive 182, compressor 18.Compressor 18 rushes geat 13 successively with condenser 12, high pressure, expansion valve 15, vaporizer 16, low pressure are rushed geat 17 and is communicated with and forms loop.High pressure fills mouth 13 and fills mouth 17 for pouring into cold-producing medium with low pressure.Compressor 18 for improving the pressure of the cold-producing medium of gaseous state, and by the refrigerant transfer of gaseous state to condenser 12.Condenser 12 is right against peripheral blower fan 10 and is arranged in bottom coohng air flue 21; The cold-producing medium flowing through the gaseous state of condenser 12 liquefies by air-cooled impact of peripheral blower fan 10, forms liquid cold-producing medium; Liquid refrigerant transfer is to expansion valve 15.Expansion valve 15 changes the cold-producing medium of liquid state into vaporific cold-producing medium, and by the refrigerant transfer of mist to vaporizer 16.Vaporizer 16 is right against inner chamber blower fan 11 and is arranged in inner chamber cooling airway 22; The cold-producing medium that vaporific flow of refrigerant transfers gaseous state to through vaporizer 16 is delivered to hydraulic press 18, so circulates.
Chiller 1 comprises temperature controller 41 and at least one temperature probe 42 further.In the present embodiment, temperature probe 42 is 2.Temperature controller 41 is connected with compressor drive 182, peripheral blower fan 10, inner chamber blower fan 11 and temperature probe 42 respectively.Temperature controller 41 sends compressor control signal to control the working speed of compressor 18 to compressor drive 182.Temperature controller 41 regulates the power of peripheral blower fan 10 and inner chamber blower fan 11.Temperature probe 42 measures the temperature of inner chamber cooling airway 22 and vaporizer 16 respectively, and measurement result is sent in temperature controller 41.
Chiller 1 also comprises device for drying and filtering 14 further.Device for drying and filtering 14 is arranged on high pressure and rushes between geat 13 and expansion valve 15, for the moisture in the cold-producing medium of filtering liquid state and impurity.
In the present embodiment, a temperature probe 42 is arranged on the air outlet of vaporizer 16, and multiple temperature probe 42 is arranged in inner chamber cooling airway 22 equably.Temperature controller 41 controls the rotating speed of compressor 18 by the feedback result of temperature probe 42 and the air quantity of peripheral blower fan 10 and inner chamber blower fan 11 reaches temperature controlled object.
The work process of chiller 1 is as follows: compressor 18, by the refrigerant compression of the gaseous state through evaporator 16, improves pressure (simultaneous temperature also improves), makes cold-producing medium ratio be easier to liquidation exothermic reaction.The cold-producing medium of the gaseous state of high pressure enters condenser 12, and peripheral blower fan 10 makes air by the gap of condenser 12, takes away cold-producing medium liberated heat and makes it liquefy.The cold-producing medium of post liquefaction enters device for drying and filtering 14, filters impurity wherein, moisture, and when the cold-producing medium simultaneously storing appropriate liquid state changes in order to cooling load, cold-producing medium can not stop.From device for drying and filtering 14 flow of refrigerant out to expansion valve 15, form atomized refrigerant from the throttle orifice ejection expansion valve 15.Vaporific cold-producing medium enters vaporizer 16, because the pressure of cold-producing medium sharply declines, evaporate gasification very soon, absorb heat, inner chamber blower fan 11 makes air constantly by the gap of vaporizer 16, its temperature declines, and is blowed by cryogenic gas to inner chamber cooling airway 22 with cooling detector module 32 wherein.The cold-producing medium of the gaseous state that vaporizer 16 flows out enters compressor 18 again and repeats said process.When temperature probe 42 detects variations in temperature, the rotating speed of temperature controller 41 adjustable compressor 18 and the air quantity of peripheral blower fan 10 and inner chamber blower fan 11 reach temperature controlled object.
Peripheral blower fan 10 sucks air by air filter 36 from the space outerpace at PET place, and the air-flow bloated is after wind deflector 34, and a part flow to the opposite side of bottom coohng air flue 21 with cooling sole electronics plate 33, enters space outerpace subsequently.Another part flow to peripheral cooling airway 20 with cooling ancillary electronics plate 31 wherein, and the air outlet by top enters space outerpace.
Inner chamber blower fan 11 drives the air in inner chamber cooling airway 22 flow through vaporizer 16 and cool, and cooled air-flow goes upward to air intake passage 23 and enters uniform air vent 35 with cooling detector module 32 wherein.After this air-flow is pooled to return air channel 24 through the air vent 35 of offside and carries out new cool cycles by inner chamber blower fan 11 suction.
Protection content of the present invention is not limited to above embodiment.Under the spirit and scope not deviating from inventive concept, the change that those skilled in the art can expect and advantage are all included in the present invention, and are protection domain with appending claims.
Claims (10)
1. the cooling system of a PET (positron emission tomography) scanner, described PET (positron emission tomography) scanner (3) comprises ancillary electronics plate (31), detector module (32) and bottom electronics plate (33), it is characterized in that, described cooling system comprises:
Peripheral cooling airway (20), described ancillary electronics plate (31) is arranged in described peripheral cooling airway (20);
Inner chamber cooling airway (22), it is cavity, comprise air intake passage (23) and return air channel (24), described detector module (32) is positioned between described air intake passage (23) and return air channel (24);
Bottom coohng air flue (21), described bottom electronics plate (33) is arranged in described bottom coohng air flue (21); And
Chiller (1), for to described peripheral cooling airway (20), inner chamber cooling airway (22) and bottom coohng air flue (21) conveying cooling blast, to cool described ancillary electronics plate (31), detector module (32) and bottom electronics plate (33).
2. the cooling system of PET (positron emission tomography) scanner as claimed in claim 1, it is characterized in that, the air intake vent place of described peripheral cooling airway (20) and the air intake vent place of described bottom coohng air flue (21) are provided with wind deflector (34); Described wind deflector (34) shunts air-flow that described peripheral blower fan (10) carries to described peripheral cooling airway (20) with bottom coohng air flue (21).
3. the cooling system of PET (positron emission tomography) scanner as claimed in claim 1, it is characterized in that, air-flow is blown into from the air intake vent of described peripheral cooling airway (20), through and flow out from the air outlet of described peripheral cooling airway (20) after cooling described ancillary electronics plate (31).
4. the cooling system of PET (positron emission tomography) scanner as claimed in claim 1, it is characterized in that, air-flow in described inner chamber cooling airway (22) is after cooling, flow through by described air intake passage (23) and cool described detector module (32), described air-flow cools again through described return air channel (24) backflow again.
5. the cooling system of PET (positron emission tomography) scanner as claimed in claim 1, it is characterized in that, air-flow is blown into from the air intake vent of described bottom coohng air flue (21), through and flow out from the air outlet of described bottom coohng air flue (21) after cooling described bottom electronics plate (33).
6. the cooling system of PET (positron emission tomography) scanner as claimed in claim 1, it is characterized in that, the both sides of described detector module (32) are equipped with passage (35); Described passage (35) makes described cooling blast evenly by described detector module (32).
7. the cooling system of PET (positron emission tomography) scanner as claimed in claim 1, it is characterized in that, described chiller (1) comprising:
Peripheral blower fan (10), it is arranged in described bottom coohng air flue (21); Described peripheral blower fan (10) carries cooling blast to described peripheral cooling airway (20) and described bottom coohng air flue (21) simultaneously;
Inner chamber blower fan (11), it is arranged in described inner chamber cooling airway (22); Air-flow in described inner chamber cooling airway (22) is driven by described inner chamber blower fan (11);
Compressor power (181), itself and described peripheral blower fan (10) and inner chamber blower fan (11) are connected in parallel, and be connected in series with compressor drive (182), compressor (18), for powering to described compressor drive (182), compressor (18);
Described compressor drive (182) is for driving and regulating the working speed of described compressor (18);
Described compressor (18) rushes geat (13) successively with condenser (12), high pressure, expansion valve (15), vaporizer (16), low pressure are rushed geat (17) and is communicated with and forms loop; Described compressor (18) improves the pressure of the cold-producing medium of gaseous state, and by the refrigerant transfer of described gaseous state to described condenser (12);
Described condenser (12) is right against described peripheral blower fan (10) and is arranged in described bottom coohng air flue (21); The cold-producing medium flowing through the gaseous state of described condenser (12) liquefies by the air-cooled impact of described peripheral blower fan (10), forms liquid cold-producing medium; The cold-producing medium of described liquid state is transferred to described expansion valve (15);
Described expansion valve (15) changes the cold-producing medium of described liquid state into vaporific cold-producing medium, and by described vaporific refrigerant transfer to described vaporizer (16);
Described vaporizer (16) is right against described inner chamber blower fan (11) and is arranged in described inner chamber cooling airway (22); Described vaporific flow of refrigerant transfers the cold-producing medium of gaseous state to through described vaporizer (16), heat in the inner chamber air-flow that the refrigerant suction of described gaseous state is driven by described inner chamber blower fan (11), the cold-producing medium of described gaseous state is fed back to described compressor (18) afterwards, so circulates.
8. the cooling system of PET (positron emission tomography) scanner as claimed in claim 7, it is characterized in that, described chiller (1) comprises further: temperature controller (41) and at least one temperature probe (42);
Described temperature controller (41) is connected with described compressor drive (182), peripheral blower fan (10) and inner chamber blower fan (11); Described temperature controller (41) sends compressor control signal to described compressor drive (182), controls the working speed of described compressor (18); Described temperature controller (41) regulates the rotating speed of described peripheral blower fan (10) and inner chamber blower fan (11), thus regulates air velocity;
Described temperature probe (42) measures the temperature of described inner chamber cooling airway (22) and/or described vaporizer (16), measurement result is sent in described temperature controller (41).
9. the cooling system of PET (positron emission tomography) scanner as claimed in claim 7, it is characterized in that, described chiller (1) comprises device for drying and filtering (14) further; Described device for drying and filtering (14) is arranged on described high pressure and rushes between geat (13) and expansion valve (15), for the moisture in cold-producing medium liquid described in filtering and impurity.
10. the cooling system of PET (positron emission tomography) scanner as claimed in claim 7, it is characterized in that, described inner chamber blower fan (11) drives the air-flow in described inner chamber cooling airway (22) to flow through described vaporizer (16), and described vaporizer (16) cools described air-flow.
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| CN201210529729.9A CN103860187B (en) | 2012-12-10 | 2012-12-10 | Cooling system of positron emission tomography scanner |
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| CN201210529729.9A CN103860187B (en) | 2012-12-10 | 2012-12-10 | Cooling system of positron emission tomography scanner |
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| CN103860187B true CN103860187B (en) | 2015-05-13 |
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| DE102017208955A1 (en) * | 2017-05-29 | 2018-11-29 | Siemens Healthcare Gmbh | Detector device comprising a cooling air path for cooling an X-ray detector |
| CN109452951A (en) * | 2018-12-30 | 2019-03-12 | 上海联影医疗科技有限公司 | A kind of medical treatment radiator, method and medical system |
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| CN103860187A (en) | 2014-06-18 |
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