CN202636940U - Specific magnetic resonance imaging device for infants - Google Patents
Specific magnetic resonance imaging device for infants Download PDFInfo
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- CN202636940U CN202636940U CN 201220145788 CN201220145788U CN202636940U CN 202636940 U CN202636940 U CN 202636940U CN 201220145788 CN201220145788 CN 201220145788 CN 201220145788 U CN201220145788 U CN 201220145788U CN 202636940 U CN202636940 U CN 202636940U
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- resonance imaging
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Abstract
The utility model discloses a specific magnetic resonance imaging device for infants. The device comprises a magnetic resonance imager, a filter board (20), a control device and a display system, wherein the magnetic resonance imager consists of a superconducting magnet (1), a radio frequency system (2), a gradient system (7) and a patient support system (3); the superconducting magnet (1) comprises a superconducting magnetic field coil (5), an active and passive shimming system (6) and a refrigeration system (4); diameters of inner walls of the superconducting magnetic field coil (5), the active and passive shimming system (6) and the gradient system (7) are decreased in order; and the refrigeration system is a stage refrigeration circulating system. By adopting the structure, the magnetic field is homogenized, temperature in the magnet changes gently due to spatial orientation of the magnetic resonance imaging system signals and a two-stage refrigeration circulating system, and the environment is stable.
Description
Technical field
This utility model relates to a kind of MR imaging apparatus, refers more particularly to a kind of MR imaging apparatus for baby's inspection.
Background technology
At present, nuclear magnetic resonance is the important means of diagnosis human body diseases, can provide the clearly image of tissue by scanning, with respect to other diagnostic means, its magnetic resonance imaging system is not only high without ionizing radiation but also definition, can provide more accurately disease information for the doctor; In addition, nuclear magnetic resonance is in the medical image of numerous Noninvasives now, because it does not have a radioactivity, very high spatial resolution is arranged, better image data data can be provided, and high tissue identification degree, therefore in medical diagnosis quite high dependency is arranged, all or soon be equipped with the magnetic resonance imaging system that designs for the adult in various places hospital.
In the new born baby of various big hospital, because the health internal organs exist damage or congenital defect after some ewborn infant birth, need in the fastest time and beeline, check the cause of disease, but do not have configuration to be installed in specially child's emergency room zero distance is carried out scanning imagery for the baby device in the existing hospital, be not applicable to the department of pediatrics MR imaging apparatus of baby's small-bore simultaneously yet; Existing magnetic resonance imaging system for the adult, magnetic field is relatively inhomogeneous, and noise is large, be not the optimum selection of baby's scanography aspect image quality and the safety.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of MR imaging apparatus for the early stage physical trait design of baby, and this utility model MR imaging apparatus volume is little, and magnet size is little, and magnetic field is even, scanning circumstance safety.
In order to solve the problems of the technologies described above, this utility model provides a kind of Special magnetic resonance imaging device for baby, comprises magnetic resonance imager, filter band, control device and display system.Described magnetic resonance imager is comprised of superconducting magnet, radio system, gradient system and patient's back-up system, described superconducting magnet comprises cryogenic magnetic field coil, active and passive shimming system and refrigeration system, be provided with main magnet coil and shielded coil in the cryogenic magnetic field coil, shielded coil is positioned at the main magnet coil outside, the in order descending arrangement of diameter of cryogenic magnetic field coil, active and passive shimming system and gradient system inwall; The two-stage system cooling system is first order cryogenic refrigerating system and second level refrigeration system, and described first order cryogenic refrigerating system is comprised of cold head and helium compressor, and second level refrigeration system is comprised of heat exchanger and water chiller.
As further improvement of the utility model, described radio system is collection emission and the radio system that is received as one, and the radio-frequency coil that is provided with in the described radio system is copper coil, and all or part of radio system also is applicable to the high-temperature superconductor radio-frequency coil; Described control device is made of electric power supply system, rf control system, computer control system, gradient control system and operator's console; Display system is comprised of computer display and printing equipment.
Adopt said structure, the utility model has the advantage of the following aspects.
1, the superconducting magnet size is little, is suitable for being placed on baby's emergency room and carries out magnetic resonance examination for the baby.Superconducting magnet comprises cryogenic magnetic field coil, active and passive shimming system and refrigeration system, be provided with main magnet coil and shielded coil in the described cryogenic magnetic field coil, shielded coil is positioned at the main magnet coil outside, shielded coil and main magnet coil pass to the electric current of different directions, each coil combined effect produces central magnetic field and available homogeneous area, so that magnetic field is even; In addition, gradient system carries out space orientation to the scanning patient.
2, described refrigeration system is the classification cooling cycle system, and the classification cooling cycle system is the two-stage system cooling system, and first order cryogenic refrigerating system is comprised of cold head and helium compressor, and second level refrigeration system is comprised of heat exchanger and water chiller; The heat that Cryo Refrigerator produces is cooled off by water chiller, Cryo Refrigerator has the secondary cold head, one-level cold head cooling magnetic resonance imager superconducting magnet cold shield, and cold screen temperature remained on 40K-70K, liquid helium vessel and cryogenic magnetic field coil in the secondary cold head cooling magnetic resonance imager, and its temperature maintained 4.2K or below the 4.2K, immediately the radiant heat that liquid helium vessel is received, the heat that wire conducts heat and magnet produces is in time discharged, cold screen is directly to arrive the inner liquid helium vessel of cold screen for the heat radiation that reduces the Dewar outer wall, thereby reduce liquid helium consumption, the volatilization of realization liquid helium zero, guarantee that simultaneously the cryogenic magnetic field coil is in superconducting state, so that variations in temperature is mild in the magnet, ambient stable.
3, described radio system is collection emission and the radio-frequency coil that is received as one, and the radio-frequency coil that is provided with in the described radio system is copper coil, and all or part of radio system is also applicable to the high-temperature superconductor radio-frequency coil; When the radio system emission excites radiofrequency signal, the signal path impedance of setting up is little, so that coil becomes transmitting antenna, when radio system receives, the signal path impedance of setting up is large, and coil becomes reception antenna, not only launches the rf wave of various flip angles according to the requirement of scanning sequence, also can receive the resonance signal of hydrogen proton in the imaging region, thereby reach the dual purpose that transmits and receive signal.
Description of drawings
Fig. 1 is the structural representation of a kind of Special magnetic resonance imaging device for baby of the present utility model.
Fig. 2 is the structural representation of refrigeration system in a kind of Special magnetic resonance imaging device for baby of this utility model.
Fig. 3 is superconducting magnet structure schematic diagram in a kind of Special magnetic resonance imaging device for baby of this utility model.
Fig. 4 is cryogenic magnetic field loop construction schematic diagram in a kind of Special magnetic resonance imaging device for baby of this utility model.
Fig. 5 is cryogenic magnetic field loop construction schematic diagram in a kind of Special magnetic resonance imaging device for baby of this utility model.
Among the figure: 1-superconducting magnet, 2-radio system, 3-patient's back-up system, 4-refrigeration system, 5-superconducting magnetic
Field coil, 6-initiatively and passive shimming system, the 7-gradient system, the 8-main magnet coil, the 9-shielded coil,
10-water chiller, 11-cold head, 12-helium compressor, 13-electric power supply system, 14-rf control system, 15-computer control system, 16-gradient control system, 17-operator's console, 18-computer display, the 19-printing equipment, 20-filter band, 21-heat exchanger.
The specific embodiment
The utility model is described in more detail below in conjunction with accompanying drawing.
Such as Fig. 1, Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5, a kind of Special magnetic resonance imaging device for baby comprises magnetic resonance imager, filter band 20, control device and display system; Described magnetic resonance imager is by superconducting magnet 1, radio system 2, gradient system 7 and patient's back-up system 3 form, described superconducting magnet 1 comprises cryogenic magnetic field coil 5, active and passive shimming system 6 and refrigeration system 4, be provided with main magnet coil 8 and shielded coil 9 in the described cryogenic magnetic field coil 5, shielded coil 9 is positioned at main magnet coil 8 outsides, cryogenic magnetic field coil 5, the in order descending arrangement of diameter of active and passive shimming system 6 and gradient system 7 inwalls, active and passive shimming system coil 6 are positioned at cryogenic magnetic field coil 5 skins, and cryogenic magnetic field coil 5 is positioned at gradient system 7 skins.
Described radio system 2 is collection emission and the radio system that is received as one, described refrigeration system 4 is the classification cooling cycle system, the classification cooling cycle system is the two-stage system cooling system, the two-stage system cooling system is first order cryogenic refrigerating system and second level refrigeration system, described first order cryogenic refrigerating system is comprised of cold head 11 and helium compressor 12, second level refrigeration system is comprised of heat exchanger 21 and water chiller 10, the radio-frequency coil that is provided with in the described radio system 2 is copper coil, all or part of radio system 2 also is applicable to the high-temperature superconductor radio-frequency coil, described control device is by electric power supply system 13, rf control system 14, computer control system 15, gradient control system 16 and operator's console 17 consist of, and described display system is comprised of computer display 18 and printing equipment 19.
The operation of MR imaging apparatus is by operator's console 17 operation controls, at first start electric power supply system 13, start the control system 15 of computer, magnetic resonance imager comprises an imaging area, a Mobile sickbed district, it is from a uniform and stable magnetic field between 0.1 tesla of tesla to 2 that superconducting magnet produces the magnetic field intensity scope at imaging area, the incubator box body of baby or placing baby is put into sick bed system, by transmitting device the baby is pushed in the superconducting magnet 1, begin scanning, this moment, the baby was placed in the magnetic field that is produced by superconducting magnet 1, each tissue by gradient system 7 and 16 couples of babies of gradient control system positions, locating information is sent into computer, obtain each tissue signal of baby by radio system 2 and rf control system 14 and send into computer, radio system 2 is implemented radio-frequency (RF) excited and received RF signal for collection emission and the radio system that is received as one, computer is to the gradient information that obtains and radio-frequency information is processed and imaging, been scanned.Too high in order to prevent the cryogenic refrigeration compressor temperature, the cryogenic refrigeration compressor must be by refrigeration system 4 coolings, refrigeration system 4 is the classification cooling cycle system, described refrigeration system 4 is the classification cooling cycle system, the classification cooling cycle system is the two-stage system cooling system, the heat that Cryo Refrigerator produces is cooled off by water chiller, Cryo Refrigerator has the secondary cold head, one-level cold head cooling magnetic resonance imager superconducting magnet cold shield, and cold screen temperature remained on 40K-70K, liquid helium vessel and cryogenic magnetic field coil in the secondary cold head cooling magnetic resonance imager, and its temperature maintained 4.2K or below the 4.2K, immediately the radiant heat that liquid helium vessel is received, the heat that wire conducts heat and magnet produces is in time discharged, thereby reaches cooling-down effect; Computer display 13 reading scan images print scanogram by printing equipment 19.
Claims (6)
1. Special magnetic resonance imaging device for baby, comprise magnetic resonance imager, filter band (20), control device and display system, described magnetic resonance imager is by superconducting magnet (1), radio system (2), gradient system (7) and patient's back-up system (3) form, described superconducting magnet (1) comprises cryogenic magnetic field coil (5), active and passive shimming system (6) and refrigeration system (4), it is characterized in that: be provided with main magnet coil (8) and shielded coil (9) in the described cryogenic magnetic field coil (5), shielded coil (9) is positioned at main magnet coil (8) outside, cryogenic magnetic field coil (5), the in order descending arrangement of diameter of active and passive shimming system (6) and gradient system (7) inwall, described radio system (2) is collection emission and the radio system that is received as one, and described refrigeration system (4) is the classification cooling cycle system.
2. a kind of Special magnetic resonance imaging device for baby according to claim 1, it is characterized in that: described classification cooling cycle system is the two-stage system cooling system.
3. a kind of Special magnetic resonance imaging device for baby according to claim 2, it is characterized in that: described two-stage system cooling system is first order cryogenic refrigerating system and second level refrigeration system, described first order cryogenic refrigerating system is comprised of cold head (11) and helium compressor (12), and second level refrigeration system is comprised of heat exchanger (21) and water chiller (10).
4. a kind of Special magnetic resonance imaging device for baby according to claim 1, it is characterized in that: the radio-frequency coil that is provided with in the described radio system (2) is copper coil, all or part of radio system (2) also is applicable to the high-temperature superconductor radio-frequency coil.
5. a kind of Special magnetic resonance imaging device for baby according to claim 1 is characterized in that: described control device is made of electric power supply system (13), rf control system (14), computer control system (15), gradient control system (16) and operator's console (17).
6. a kind of Special magnetic resonance imaging device for baby according to claim 1, it is characterized in that: described display system is comprised of computer display (18) and printing equipment (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220145788 CN202636940U (en) | 2012-04-10 | 2012-04-10 | Specific magnetic resonance imaging device for infants |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220145788 CN202636940U (en) | 2012-04-10 | 2012-04-10 | Specific magnetic resonance imaging device for infants |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202636940U true CN202636940U (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220145788 Expired - Lifetime CN202636940U (en) | 2012-04-10 | 2012-04-10 | Specific magnetic resonance imaging device for infants |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202636940U (en) |
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2012
- 2012-04-10 CN CN 201220145788 patent/CN202636940U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20160726 Granted publication date: 20130102 |
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| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20170726 Granted publication date: 20130102 |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |