CN108541201B - A kind of dehumidification device and system for positron emission tomography - Google Patents
A kind of dehumidification device and system for positron emission tomography Download PDFInfo
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- CN108541201B CN108541201B CN201810739571.5A CN201810739571A CN108541201B CN 108541201 B CN108541201 B CN 108541201B CN 201810739571 A CN201810739571 A CN 201810739571A CN 108541201 B CN108541201 B CN 108541201B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
Abstract
The present invention relates to a kind of dehumidification devices for positron emission tomography, can have dehumidification function without increasing active dehumidifier and respective line.The dehumidification device includes the shell of encapsulated detector, and shell includes annular profile face and the end face with annular profile face cooperation, and annular profile face is made of the splicing of multiple minor structures, offers through-hole in each minor structure；The dehumidifying component of built-in desiccant is installed, dehumidifying component is passive device, and dehumidifying component is connected to adsorb the intracorporal vapor of shell with the through-hole in each minor structure.
Description
Technical field
The present invention relates to a kind of dehumidification device for positron emission tomography and positron emission fault at
As system.
Background technique
In field of medical imaging, positron emission tomography (Positron Emission Tomography, letter
Claim PET) it is playing an increasingly important role as a kind of functional imaging equipment.PET be a kind of hurtless measure show human body
The imaging technique of organ dysfunction and metabolism, its working principle is that by biological life be metabolized in necessary substance, such as: glucose, egg
White matter, nucleic acid, fatty acid, short-life radionuclide (such as 18F, 11C etc.) on label inject human body, utilize human body different
The metabolism state of tissue is different, for example glucose metabolism is vigorous in the malignant tumor tissue of hypermetabolism, and aggregation is more, by these
The feature of reflection vital metabolic activity is reflected by image, to achieve the purpose that early diagnose the diseases such as tumour.PET system
Most crucial component is detector in system, and the signal amplifier part that traditional pet detector uses is photomultiplier tube
Photomultipliers (abbreviation PMT), temperature drift are the fundamental characteristics of PMT, based on the PET of photomultiplier tube for work
Absolute temperature it is of less demanding, major requirement is the harmony and stability of internal system temperature.As technology develops,
Silicon Photomultipliers (abbreviation SiPM) is a kind of completely new highly sensitive silicon photodetector part, and SiPM makees
For a kind of novel semiconductor detector, compared to Traditional photovoltaic multiplier tube (PMT) have it is many a little, such as detection efficient is more
Height, under low pressure, and under unconventional high pressure, insensitive to magnetic field, these all help to obtain higher-quality detection for work
Signal, to improve picture quality.Say there is that small volume structure is compact from structure and price, price is lower,
The application of SiPM technology, represents the developing direction of PET technology, and domestic and international producer is all researching and developing the PET detection based on SiPM technology
Device and PET system.
Not high for the temperature requirement of work based on the PET system of Traditional photovoltaic multiplier tube, major requirement is internal system
The stability of temperature, the PET based on Traditional photovoltaic multiplier tube is using air-cooled radiating mode in existing business equipment.But
It is for the PET system based on SiPM, due to the self-characteristic of SiPM, determining it, light output is more at low temperatures
Sensitive, therefore, the performance of SiPM detector can be improved in the operating temperature for reducing SiPM chip, so currently based on SiPM's
PET system mostly uses the mode of water cooling to radiate it, and it is vapour-set that the maximum challenge of cooling system is that low temperature is lauched
Problem, the condensation trouble being just known as, moisture condensation risk can be reduced by reducing humidity, and existing way is to use water cooling
When system, system uses the dehumidifier of an active profession simultaneously, is in this way reduced to system centainly by dehumidifier
Corresponding humidity, then guarantee water cooling unit work in lower temperature, about 1~4 degree Celsius.It is solved by the effect of dehumidifier
The condensation trouble of system.The shortcomings of doing so: first, increase individual dehumidifier and dehumidifier pipeline, make system at
This and complexity increase；Second, dehumidifier is individual active equipment, needs to occupy certain area, and have outdoor unit, is increased
The space occupied and installation complexity of equipment are added.
Summary of the invention
(1) technical problems to be solved
The present invention provide it is a kind of without increase active dehumidifier and respective line can have dehumidification function for just
The dehumidification device of positron emission tomography system.
(2) technical solution
The first purpose of the invention is to provide a kind of dehumidification device for positron emission tomography, packets
Include: the shell of encapsulated detector, the shell include annular profile face and the end face with annular profile face cooperation, the ring
Shape outer peripheral surface is made of the splicing of multiple minor structures, offers through-hole in each minor structure；
The dehumidifying component of built-in desiccant is installed, the dehumidifying component is passive device, and institute in each minor structure
Dehumidifying component is stated to be connected to the through-hole to adsorb the intracorporal vapor of the shell.
Optionally, all minor structures in the annular profile face are identical, and each minor structure is surface plate, each is flat
Panel installs the dehumidifying component in the one side of the detector.
Optionally, the dehumidifying component includes: the desiccant cartridge and end cap net for accommodating bagged dryer；
The end cap net is mounted on the open area of the desiccant cartridge, and the bagged dryer is limited in the dehumidifying
In box；And the mesh of the end cap net of the dehumidifying component is corresponding with the through-hole of the surface plate.
Optionally, the edge of the desiccant cartridge open area is sealed by sealing strip and the surface plate；
And/or the desiccant cartridge is the cylindrical structure of transparent material；
And/or the desiccant cartridge is the cylindrical structure of nonmetallic materials preparation.
Optionally, it is used to carry the spy in each surface plate and the positron emission tomography PET
It surveys between the installation foundation plate of device and is sealed using sealing strip,
The end face includes the polygonal outer edge adjacent with each surface plate in annular profile face, outside the polygon
It is sealed between each side and each surface plate at edge using sealing strip.
Optionally, each surface plate in the annular profile face is rectangular parallelepiped structure；
And/or each surface plate is the rectangular parallelepiped structure of aluminium sheet material；
And/or the length of each surface plate is 321.5mm, width 260mm, all surface plates are spliced to form interior
Cutting diameter of a circle is 1200mm；
And/or the diameter of through-hole is 160mm on each surface plate.
Optionally, the quantity of the surface plate is 12,8 or 6.
Optionally, the bagged dryer is under normal temperature environment: when envionmental humidity is 20%RH, hydroscopicity is greater than etc.
In 25%.
Optionally, the end face is made of multiple mutually isostructural back shroud splicings, and each back shroud has the end face
Polygonal outer edge a side.
A second object of the present invention is to provide a kind of positron emission tomographies, comprising: outer cover, and be located at outer
Any dehumidification device as above in cover.
(3) beneficial effect
It can completely dispensed with using active using the dehumidification device for positron emission tomography of the invention
Industrial dehumidifier in the case where reduce inner annular space humidity, reduce the cost of system, reduce the installation space of system
It is required that reducing the complexity of system, the stability of system operation is improved.
Detailed description of the invention
Fig. 1 is the part-structure of the dehumidification device provided in an embodiment of the present invention for positron emission tomography
Schematic diagram；
Fig. 2 is the schematic front view of the dehumidification device in Fig. 1, wherein end face is eliminated, preferably to show inner annular space；
Fig. 3 A is the simplified structure diagram of the dehumidifying component and sealing strip in Fig. 1；
Fig. 3 B is the enlarged diagram of part-structure in Fig. 3 A；
Fig. 4 is the structural schematic diagram for the back shroud that dehumidification device uses in Fig. 1；
Fig. 5 is the schematic diagram for the D type sealing strip that dehumidification device uses in Fig. 1；
Fig. 6 is the schematic diagram of cylindrical inner；
Fig. 7 is the schematic diagram of PET in the embodiment of the present invention.
[description of symbols]
1: installation foundation plate；2: dehumidifying component；3: surface plate；4: sealing strip；5: back shroud；6: cylindrical inner；7: in
Heart hole；8: detector；9: inner annular space；10: desiccant cartridge；12: end cap net；13: outer cover.
Specific embodiment
In order to preferably explain the present invention, in order to understand, with reference to the accompanying drawing, by specific embodiment, to this hair
It is bright to be described in detail.
Referring to Figures 1 and 2, a kind of dehumidifying dress for positron emission tomography is provided in the present embodiment
It sets, dehumidification device includes: the shell of encapsulated detector 8, and shell includes annular profile face, and annular profile face is by multiple surface plates 3
Splicing forms, and offers through-hole (not shown) on each surface plate 3；
The dehumidifying component 2 that is on one side equipped with built-in desiccant of each surface plate 3 away from detector 8, the dehumidifying group
Part 2 is passive device, and the dehumidifying component 2 is connected to adsorb and be in low temperature environment (the low temperature ring where detector with through-hole
Border) the intracorporal vapor of lower casing.
The annular profile face shown in fig. 1 and fig. 2 is made of the splicing of multiple surface plates, because surface plate manufacture is more
It is easy, and can preferably be bonded easily sealing with dehumidifying component.During specific implementation, above-mentioned annular profile face be can also be
Other minor structure splicings, such as arc surface or arc surface and surface plate are alternately present and then are spliced into annular profile face etc.,
The present embodiment does not limit it, adjusts according to actual needs.
In a particular application, settable more than two dehumidifying components on each surface plate, correspondingly, each dehumidifying component
A through-hole on corresponding flat plate, the present embodiment do not limit it, adjust according to actual needs.Further, the present embodiment
Dehumidifying component shown in Fig. 1 is respectively positioned on surface plate in the one side of detector, and in other embodiments, dehumidifying component may be used also
Positioned at surface plate in the one side of detector, dehumidifying component adsorbs the intracorporal water of shell by the through-hole being arranged on desiccant cartridge at this time
Steam, dehumidifying component and surface plate seal, and surface plate can no setting is required that through-hole etc. is adaptively adjusted, and belongs to the model of the application
It encloses.
In the present embodiment, the quantity of Fig. 1 and surface plate shown in Fig. 2 is 12, i.e., the annular in Fig. 1 and Fig. 2 is outer
Circumferential surface is made of 12 surface plate splicings.The present embodiment does not limit the quantity of surface plate, is arranged according to the actual needs, such as
It can be 6,8,4,5 etc..
As shown in Figure 1, the shell of the encapsulated detector 8 in the present embodiment further includes end face；The end face includes one polygon
Shape outer edge and a circular inner edge, each surface plate on each side of the polygonal outer edge and the annular profile face
The cylindrical shape of scanning space is used to form in 3 adjoinings, the circular inner edge and the positron emission tomography PET
One end of inner wall 6 is adjacent to be tightly connected；
The structural schematic diagram of cylindrical inner 6 as shown in FIG. 6, for carrying in the other end and PET of cylindrical inner 6
The center hole wall (centre bore 7 as shown in Figure 1) of the installation foundation plate 1 of the detector connects, the annular profile face it is every
One surface plate 3 is fixed on the installation foundation plate 1.
In practical applications, end face shown in Fig. 1 can be made of multiple mutually isostructural splicings of back shroud 5, Mei Gehou
Cover board 5 has a side of the polygonal outer edge of the end face, as shown in Fig. 4.
In Fig. 1, the quantity of back shroud 5 is identical with the quantity of surface plate 3, i.e. a back shroud is matched with a surface plate
It closes, in other embodiments, the quantity of back shroud can not be identical as the quantity of surface plate, can be determined according to practical preparation process.
For the detachable structure for needing to be arranged end face and being made of back shroud of PET later maintenance in the present embodiment, the present embodiment
Back shroud is made of plastic material plastic uptake, it is of course also possible to be made using aluminium or steel of the method for punch process.This
In embodiment, sealant tape realization is can be used in the sealing between adjacent back shroud.
In a particular application, 4 (such as Fig. 5 of sealing strip is used between each surface plate 3 and installation foundation plate 1 shown in Fig. 1
Shown in D type sealing strip) sealing, similarly, using close between each surface plate 3 and each side of the polygonal outer edge
Strip of paper used for sealing (such as D type sealing strip) sealing.
That is, all connections of the shell of above-mentioned encapsulated detector are required to be tightly connected, sealing strip such as can be used
The sealing of each join domain is realized, to guarantee the detector place low temperature in space and the wettability power of dehumidifying component.Namely
It says, the space where detector belongs to the space of liquid cooling operation, strict control humidity is needed, in use water-cooling pattern to detector
When being cooled down, when the space where detector is sealing space, extraneous vapor be cannot be introduced into, and then dehumidifying component can be protected
Demonstrate,prove effect on moisture extraction.
In the present embodiment, the structure of all surface plates above-mentioned is all the same, and each surface plate is rectangular parallelepiped structure；
For example, each surface plate can be the rectangular parallelepiped structure of aluminium sheet material；The length is 321.5mm, width 260mm, Suo Youping
The inscribe diameter of a circle that panel splicing is formed is 1200mm；And the diameter of through-hole can be 160mm on surface plate.In the present embodiment,
The purpose that surface plate is arranged is to facilitate the sealed connection of dehumidifying component and surface plate.
In other embodiments, the size of the surface plate can also be set as needed, the structure of all surface plates is different
It is fixed identical.
As shown in Figure 3A and Figure 3B, the dehumidifying component 2 in the present embodiment includes: the desiccant cartridge for accommodating bagged dryer
10 and end cap net 12；
The end cap net 12 is mounted on the open area of the desiccant cartridge 10, the bagged dryer is limited in described
In desiccant cartridge 10；And the mesh of the end cap net 12 of the dehumidifying component 2 is corresponding with the through-hole of the surface plate 3.
The mode that threaded connection can be used in desiccant cartridge in practical applications is connect with surface plate 3, and is open in desiccant cartridge 10
The edge in region is sealed by sealing strip 4 and the surface plate；Desiccant cartridge 10 in the present embodiment can be the cylinder of transparent material
Body structure；Alternatively, desiccant cartridge can be cylindrical body that is prepared by nonmetallic materials and being processed using plastic uptake mode in other embodiments
Structure.For example, plastic uptake mode can be used and process when desiccant cartridge is transparent ABS/ acrylic material, to facilitate inside observation
Desiccant state.Particularly, 10 box surface plate of the desiccant cartridge sealing of the present embodiment uses D type sealing strip, and as shown in Figure 3B is close
Seal details.
The bagged dryer is under normal temperature environment: when envionmental humidity is 20%RH, hydroscopicity is more than or equal to 25%.
Desiccant used in each dehumidifying component is bagged dryer, each bagged dryer weight in PET in the present embodiment
Amount is 0.2kg, and the desiccant total weight of all dehumidifying components is 2.4kg.
The dehumidifying component of the present embodiment belongs to passive dehumidification mode, it is possible thereby to preferably reduce without connecting power supply
The space occupied of PET and reduce installation complexity, at the same can make the detector of PET can work lower temperature (about 1~
4 degrees Celsius).
As shown in fig. 7, another aspect of the present invention also provides a kind of positron emission tomography (PET), this is just
Positron emission tomography system can include: outer cover 13 and any dehumidification device as above in outer cover 13.
In Fig. 7, relative to the scanning space of patient, above-mentioned dehumidification device is the whole of a sealing relative to scanning space
Body, the space between outer cover and dehumidification device constitute an outer annular space, and the space formed in dehumidification device can be described as interior annular space
Between 9.
It will be appreciated that being arranged inside the outer annular space of PET, on the outer peripheral surface of inner annular space in the present embodiment passive
Dehumidifying component, by the bagged dryer in periodic replacement dehumidifying component, to realize that the inner annular space holding one of PET is lower
Humidity (the lower humidity be generally understood as not higher than 20%RH), and then realize that the detector of PET works in a low temperature
(water temperature that low temperature environment is generally understood cooling water in PET reaches 1~4 DEG C, and the detector of PET is located at low temperature at this time under environment
1~5 DEG C under environment).
In general, PET is in the independent room of hospital, the humidity in the humidity and room of outer annular space is almost the same thus.
Inner annular space keeps leakproofness, uses highly hygroscopic desiccant inside dehumidifying component at this time, can reduce the maintenance of PET device at
This.
The wettability power of dehumidifying component in the present embodiment, as shown in table 1 below, the bagged dryer in dehumidifying component is in moisture absorption
After can be converted to gel by powdered.
Table 1: the wettability power under different humidity
It is isolated between the outer annular space of PET in Fig. 7 and room by outer cover, usually arranges detector etc. in outer annular space
Power supply, electric wire etc., inner annular space arranges the core component such as detector, liquid cooled module of PET.
In the present embodiment, the spatial volume of the inner annular space of PET are as follows:
π(R2-r2) xD=π (0.6 × 0.6-0.38 × 0.38) × 0.26=0.176 cubic metres；
The water content of saturated moist air is 17.68g/ cubic metres in the case of 20 degrees Celsius；
The water content of inner annular space is that 17.68x0.176=3.11g is far smaller than bagged dryer calculating in dehumidifying component
Wettability power (2.4kg × 25%=600g).
During specific implementation, inner annular space and outer annular space are all closed structures, and then can preferably keep interior
The drying of ring, so that the water-cooling system work of detector avoids condensing at a lower temperature.
It is verified by test of many times, the service life of the bagged dryer of dehumidifying component is about six months.
Above-mentioned PET reduces the cost of PET, reduces simultaneously without active industrial dehumidifier in the prior art
Installation space and process complexity improve the stability of PET operation.
It should be noted that the connection of shell space and the shell external space where the detector sealed in current PET
There are two types of, one kind is that power supply connects, and power supply line is connect by the string holes (can be circle) on installation foundation plate with external power supply, respectively
Using the gap between sealant filling cable between power supply line, after power supply line passes through the string holes of installation foundation plate, use
Sealing is realized in sealant blind；Another kind is that data line is connect with data processing plate, and data line is flat wire, so data line
It is connect by the waist-shaped hole on installation foundation plate with data processing plate, after data line tying is good, the gap between line uses sealing
Glue filling realizes sealing using sealant filling by the waist-shaped hole gap on installation foundation plate.Do not change in the present embodiment
The connection type of the power supply line of the structure and detector of detector, can be implemented in the way of the prior art.
It is to be appreciated that describing the skill simply to illustrate that of the invention to what specific embodiments of the present invention carried out above
Art route and feature, its object is to allow those skilled in the art to can understand the content of the present invention and implement it accordingly, but
The present invention is not limited to above-mentioned particular implementations.All various changes made within the scope of the claims are repaired
Decorations, should be covered by the scope of protection of the present invention.
Claims (8)
1. a kind of dehumidification device for positron emission tomography characterized by comprising the shell of encapsulated detector
Body, the shell include annular profile face and the end face with annular profile face cooperation, and the annular profile face is by multiple sons
Structures to form forms, and offers through-hole in each minor structure；
The dehumidifying component of built-in desiccant is installed, the dehumidifying component is passive device, and described is removed in each minor structure
Wet component is connected to adsorb the intracorporal vapor of the shell with the through-hole；
All minor structures in annular profile face described in encapsulated detector are identical, and each minor structure is surface plate, each is flat
Panel installs the dehumidifying component in the one side of the detector；
The dehumidifying component includes: the desiccant cartridge and end cap net for accommodating bagged dryer；
The end cap net is mounted on the open area of the desiccant cartridge, and the bagged dryer is limited in the desiccant cartridge
It is interior；And the mesh of the end cap net of the dehumidifying component is corresponding with the through-hole of the surface plate.
2. dehumidification device according to claim 1, which is characterized in that
The edge of the desiccant cartridge open area is sealed by sealing strip and the surface plate；
And/or the desiccant cartridge is the cylindrical structure of transparent material；
And/or the desiccant cartridge is the cylindrical structure of nonmetallic materials preparation.
3. dehumidification device according to claim 1 or 2, which is characterized in that
For carrying the installation base of the detector in each surface plate and the positron emission tomography PET
It is sealed between plinth plate using sealing strip,
The end face includes the polygonal outer edge adjacent with each surface plate in annular profile face, the polygonal outer edge
Each side and each surface plate between using sealing strip seal.
4. dehumidification device according to claim 1 or 2, which is characterized in that
Each surface plate in the annular profile face is rectangular parallelepiped structure；
And/or each surface plate is the rectangular parallelepiped structure of aluminium sheet material；
And/or the length of each surface plate is 321.5mm, width 260mm, the inscribed circle that all surface plates are spliced to form
Diameter be 1200mm；
And/or the diameter of through-hole is 160mm on each surface plate.
5. dehumidification device according to claim 4, which is characterized in that
The quantity of the surface plate is 12,8 or 6.
6. dehumidification device according to claim 1, which is characterized in that
The bagged dryer is under normal temperature environment: when envionmental humidity is 20%RH, hydroscopicity is more than or equal to 25%.
7. dehumidification device according to claim 3, which is characterized in that
The end face is made of multiple mutually isostructural back shroud splicings, and each back shroud has outside the polygon of the end face
One side of edge.
8. a kind of positron emission tomography, comprising: outer cover, which is characterized in that further include as above in outer cover
Any dehumidification device of claim 1 to 7.
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| CN201810739571.5A CN108541201B (en) | 2018-07-06 | 2018-07-06 | A kind of dehumidification device and system for positron emission tomography |
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|---|---|---|---|
| CN201810739571.5A CN108541201B (en) | 2018-07-06 | 2018-07-06 | A kind of dehumidification device and system for positron emission tomography |
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| CN108541201B true CN108541201B (en) | 2019-09-13 |
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| Publication number | Publication date |
|---|---|
| CN108541201A (en) | 2018-09-14 |
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