CN214174598U - SAR value sensing and collecting device of magnetic resonance system - Google Patents
SAR value sensing and collecting device of magnetic resonance system Download PDFInfo
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- CN214174598U CN214174598U CN202023229324.2U CN202023229324U CN214174598U CN 214174598 U CN214174598 U CN 214174598U CN 202023229324 U CN202023229324 U CN 202023229324U CN 214174598 U CN214174598 U CN 214174598U
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Abstract
The application relates to a SAR value sensing and collecting device of a magnetic resonance system, which relates to the field of medical equipment and comprises a shielding case, and a DC power supply filtering device, a wave detection device, a high-speed ADC collecting device and an optical fiber conversion device which are assembled in the shielding case. The application has the advantages that: the acquisition device is made of a non-magnetic device, so that the influence on the field uniformity of the magnetic resonance system is prevented; the radio frequency waveform is demodulated by adopting a detection mode, so that the cost of acquisition hardware is reduced to the maximum extent; the related working modules are arranged in the shielding case, the power supply supplies power through filtering, the communication adopts optical fiber communication, a better electromagnetic shielding effect is achieved, the related working modules can be arranged in a shielding room of a magnetic resonance system, the related working modules are close to a radio frequency output terminal to the maximum extent, and the accuracy of SAR monitoring is improved.
Description
Technical Field
The application relates to the field of medical equipment, in particular to an SAR value sensing and collecting device of a magnetic resonance system.
Background
Magnetic Resonance Imaging (MRI) system is a very complex medical Imaging system, and in recent years, with the continuous development of technology, the main Magnetic field has been continuously enhanced from 0.2 to 3T or even 9.4T, etc., however, the power of the radio frequency signal is also increased due to the enhancement of the field strength, the energy absorbed by the human body is larger, and finally the body temperature is increased, and even local burns, heart rate acceleration, etc. can occur. Therefore, this problem needs to be monitored, and the sar (specific Absorption rate) value is commonly used internationally to specify the corresponding safety standard.
In the related technology, a spectrometer, a radio frequency power amplifier and other equipment are placed in a device room, a magnet, a radio frequency transmitting coil and other equipment are placed in a shielding room, and when the SAR value is monitored, in order to take the compatibility of a magnetic resonance system into consideration and avoid the mutual interference of the monitoring system and an imaging system, SAR value detection equipment is placed in the device room, but the distance between a detection end and a transmitting end is increased, and the accuracy is sacrificed under multiple factors such as attenuation of a radio frequency cable.
In view of the above-mentioned related art, the inventors believe that there is room for improvement in the way of placing the SAR value detection device within the device room during the process of acquiring the SAR value.
SUMMERY OF THE UTILITY MODEL
In order to reduce the field nonuniformity of magnetic resonance, reduce the hardware cost of acquisition, reduce the influence on a magnetic resonance system and reduce the influence on the magnetic resonance system, SAR value detection equipment is placed in a shielding room to obtain an SAR value with extremely high accuracy, the SAR value sensing acquisition device of the magnetic resonance system is provided.
The application provides a magnetic resonance system's SAR value sensing collection system, adopts following technical scheme:
an SAR value sensing and collecting device of a magnetic resonance system comprises a shielding case, a DC power supply filtering device, a wave detection device, a high-speed ADC collecting device and an optical fiber conversion device;
the shielding case is used for installing the DC power supply filtering device, the wave detection device, the high-speed ADC acquisition device and the optical fiber conversion device;
the DC power supply filtering device is used for filtering an external DC power supply to supply power to the detection device, the high-speed ADC acquisition device and the optical fiber conversion device;
the detection device is used for receiving the radio frequency signal and demodulating the radio frequency signal into an envelope waveform, and the radio frequency signal is obtained by amplifying the signal obtained by the magnetic resonance through a radio frequency power amplifier and then attenuating the signal through a directional coupler;
the high-speed ADC acquisition device is connected with the detection device to receive the envelope waveform and convert the analog signal of the envelope waveform into a digital signal;
the optical fiber conversion device is connected with the high-speed ADC acquisition device to receive the digital signals and is used for converting the communication mode of the digital signals into optical fiber transmission.
By adopting the technical scheme, the DC power supply filtering device is used for filtering the direct current supplied with power, so that the use stability of the power supply is improved, and the use stability of the detection device, the high-speed ADC acquisition device and the optical fiber conversion device is ensured. The detection device demodulates the radio frequency signal into the envelope waveform, converts the analog signal of the envelope waveform into a digital signal through the high-speed ADC acquisition device, and converts the digital signal into an optical fiber through the optical fiber conversion device for transmission, so that the transmission stability is improved, and the data transmission accuracy is improved. The shielding case further improves the anti-interference capability, so that the SAR value detection equipment can be placed in the shielding room.
Optionally, the shielding enclosure includes a first connecting plate and a substrate;
the first connecting plate is used for installing a DC power supply filtering device and a detection device, the substrate is arranged on the first connecting plate, and the substrate is used for installing the high-speed ADC collecting device and the optical fiber conversion device.
Through adopting above-mentioned technical scheme, thereby supply DC power filter and detection device to install through first connecting plate to the base plate supplies high-speed ADC collection system and fiber conversion device to install, and is more stable on the whole.
Optionally, the shielding enclosure further includes a second connecting plate and a cover plate;
the second connecting plate is fixed with one side, far away from the first connecting plate, of the base plate through bolts, the cover plate is arranged on one side, far away from the base plate, of the first connecting plate, and the cover plate is fixed with the first connecting plate through bolts.
Through adopting above-mentioned technical scheme, through the setting of second connecting plate to holistic stability has been improved, and the setting of apron, further covers whole, reduces the dust and gets into, and the practicality is strong.
Optionally, the first connecting plate and the second connecting plate are both provided with a first erection plate for erecting the base plate, and the first erection plate and the first connecting plate are fixed through bolts.
Through adopting above-mentioned technical scheme, the setting of first erectting the board is when installing first connecting plate and second connecting plate, and is more stable, has improved the connection stability between whole, and the practicality is strong.
Optionally, the first connecting plate and the second connecting plate are both provided with a second erection plate for erecting the cover plate, and the second erection plate and the second connecting plate are fixed through bolts.
Through adopting above-mentioned technical scheme, the setting of second frame work board is with first connecting plate and second connecting plate when installing, and is more stable, has improved the connection stability between whole, and the practicality is strong.
Optionally, first sealing plates are symmetrically arranged on two sides of the first connecting plate on the base plate, second sealing plates are symmetrically arranged on two sides of the first connecting plate on the cover plate, and the first sealing plates and the second sealing plates are mutually abutted and sealed.
Through adopting above-mentioned technical scheme, the setting of first closing plate cooperates the use of second closing plate to with airtight more between base plate and the apron, can play the effect of shielding, improved holistic dustproof effect, reduce the dust and get into, the practicality is strong.
Optionally, the first connecting plate, the second connecting plate and the substrate are all provided with connecting pieces, and the connecting pieces are provided with wires for communicating the connecting pieces.
Through adopting above-mentioned technical scheme, through the setting of connecting piece, the use of rethread wire to switch on first connecting plate, second connecting plate and base plate mutually, thereby will reduce the injury of static, the practicality is strong.
Optionally, the two ends of the wire are provided with conductive pins sleeved on the connecting piece, and the connecting piece is connected with a connecting ring for fixing the conductive ring in a threaded manner.
Through adopting above-mentioned technical scheme, through the setting of wire participate in, make the connecting piece when connecting, more stable to carry out the screw thread through the go-between and compress tightly, reduce the pine and take off, improved holistic stability.
Optionally, a conversion line connected with the optical fiber conversion device is further arranged on the high-speed ADC collecting device, a fixing block for fixing the conversion line is arranged on the substrate, a connecting block is further arranged on the fixing block, and a ribbon for fixing the conversion line is arranged on the connecting block.
Through adopting above-mentioned technical scheme, through the setting of conversion line to the effect of the transmission of signal will be played, and the connecting block on the fixed block has played holistic fixed, and the rethread ribbon is fixed the conversion line, reduces the pine and takes off, and the practicality is strong.
Optionally, the connecting block is provided with a connecting seat, the connecting seat is provided with a through hole for the binding belt to penetrate through, and the connecting block is further provided with a reinforcing rib mutually connected with the connecting seat.
Through adopting above-mentioned technical scheme, through the perforation setting on the connecting seat, will improve the availability factor of ribbon, it is more convenient during the use to through the use of strengthening rib, improved holistic structural strength, the practicality is strong.
In summary, the present application includes at least one of the following beneficial technical effects:
1. reducing field inhomogeneities of the magnetic resonance system;
2. the hardware cost of the acquisition device is reduced;
3. a better electromagnetic shielding effect is achieved;
4. the accuracy of SAR value monitoring is improved.
Drawings
Fig. 1 is a schematic structural diagram of an SAR value sensing and acquiring device.
Fig. 2 is an explosion diagram of the SAR value sensing and collecting device.
Fig. 3 is a schematic view of the mounting of the fixing block, the connecting block and the binding band.
Description of reference numerals: 1. a DC power supply filter device; 2. a wave detection means; 3. a high-speed ADC acquisition device; 4. an optical fiber conversion device; 5. a first connecting plate; 6. a substrate; 7. a second connecting plate; 8. a cover plate; 9. a first mounting plate; 10. a second mounting plate; 11. a first sealing plate; 12. a second sealing plate; 13. a connecting member; 14. a wire; 15. a conductive pin; 16. a connecting ring; 17. converting the wire; 18. a fixed block; 19. connecting blocks; 20. binding a belt; 21. a connecting seat; 22. perforating; 23. reinforcing ribs; 24. and shielding the case.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses SAR value sensing and collecting device of magnetic resonance system, reduces magnetic resonance's field inhomogeneity, reduces the hardware cost of gathering, reduces the influence to the magnetic resonance system, reduces the influence of magnetic resonance system, and SAR value check out test set places in shielding room, obtains an accurate SAR value.
Referring to fig. 1 and 2, an SAR value sensing and acquiring device of a magnetic resonance system includes a shielding case 24, a DC power filter device 1, a wave detection device 2, a high-speed ADC acquisition device 3, and an optical fiber conversion device 4.
The shielding case 24 comprises a first connecting plate 5, a base plate 6, a second connecting plate 7 and a cover plate 8.
The DC power filter device 1 is connected to an external DC power source, and is configured to filter the external DC power source to supply power to the detection device 2, the high-speed ADC acquisition device 3, and the optical fiber conversion device 4.
The wave detection device 2 is used for receiving a radio frequency signal and demodulating the radio frequency signal into an envelope waveform, wherein the radio frequency signal is a signal generated when the radio frequency signal passes through magnetic resonance, the signal is amplified through a radio frequency power amplifier, and a high-power signal is attenuated through a directional coupler to obtain the radio frequency signal.
The high-speed ADC acquisition device 3 is connected with the detection device 2 to receive the envelope waveform and convert the analog signal of the envelope waveform into a digital signal, and the optical fiber conversion device 4 is connected with the high-speed ADC acquisition device 3 to receive the digital signal and convert the communication mode of the digital signal into optical fiber transmission.
Referring to fig. 2, the DC power filter device 1 and the detector device 2 are mounted on a first connecting plate 5, the high-speed ADC collecting device 3 and the optical fiber conversion device 4 are mounted on a substrate 6, the substrate 6 is located below, a cover plate 8 is disposed above the substrate 6, and the substrate 6 is disposed corresponding to the cover plate 8.
One end of the base plate 6 is provided with a first connecting plate 5, and the other end of the base plate 6 is provided with a second connecting plate 7. The upper ends of the first connecting plate 5 and the second connecting plate 7 are integrally provided with a first erection plate 9, and the lower ends of the first connecting plate 5 and the second connecting plate 7 are integrally provided with a second erection plate 10.
The first bridge plate 9 and the cover plate 8 are fixed by bolts, and the second bridge plate 10 and the base plate 6 are fixed by bolts.
And the both sides of apron 8 are integrative to be provided with first closing plate 11, and first closing plate 11 is the symmetry and sets up. And the integrative second closing plate 12 that is provided with in both sides of base plate 6, second closing plate 12 are the symmetry and set up, and first closing plate 11 is contradicted mutually with second closing plate 12 and is sealed to protect inside DC power filter 1, detection device 2, high-speed ADC collection system 3 and optical fiber conversion device 4.
Referring to fig. 2, the first connecting plate 5, the second connecting plate 7 and the base plate 6 are provided with connectors 13 inside, and the connectors 13 are bolts. And the connecting piece 13 is also provided with a lead 14 for communicating with the connecting piece 13, thereby communicating the substrate 6, the first connecting plate 5 and the second connecting plate 7.
The wire 14 has both ends, and conductive pins 15 are connected to both ends of the wire 14, and the conductive pins 15 communicate with the wire 14. The conductive pin 15 is sleeved on the connector 13 and fixed by the connection ring 16, the connection ring 16 is screwed with the connector 13, and the connection ring 16 may adopt a nut, thereby compressing and fixing the conductive pin 15.
Referring to fig. 2 and 3, a conversion line 17 connected to the optical fiber conversion device 4 is connected to the high-speed ADC collecting device 3, a fixing block 18 for fixing the conversion line 17 is bonded to the substrate 6 by glue, and a connecting block 19 is bonded to the fixing block 18 by glue.
A connecting seat 21 is integrally arranged on one side of the connecting block 19 far away from the fixing block 18, a binding tape 20 for fixing the conversion line 17 is arranged on the connecting seat 21, a through hole 22 for inserting the binding tape 20 is formed in the connecting seat 21, and a reinforcing rib 23 mutually connected with the connecting seat 21 is integrally arranged on the connecting block 19.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The SAR value sensing acquisition device of the magnetic resonance system is characterized in that: the device comprises a shielding case (24), a DC power supply filtering device (1), a detection device (2), a high-speed ADC acquisition device (3) and an optical fiber conversion device (4);
the shielding case (24) is used for installing the DC power supply filtering device (1), the wave detection device (2), the high-speed ADC acquisition device (3) and the optical fiber conversion device (4);
the DC power supply filtering device (1) is used for filtering an external DC power supply to supply power to the detection device (2), the high-speed ADC acquisition device (3) and the optical fiber conversion device (4);
the detection device (2) is used for receiving the radio-frequency signal and demodulating the radio-frequency signal into an envelope waveform, and the radio-frequency signal is obtained by amplifying a signal obtained by magnetic resonance through a radio-frequency power amplifier and then attenuating the amplified signal through a directional coupler;
the high-speed ADC acquisition device (3) is connected with the detection device (2) to receive the envelope waveform and convert the analog signal of the envelope waveform into a digital signal;
the optical fiber conversion device (4) is connected with the high-speed ADC acquisition device (3) to receive the digital signals and is used for converting the communication mode of the digital signals into optical fiber transmission.
2. The apparatus of claim 1, wherein the apparatus comprises: the shielding case (24) comprises a first connecting plate (5) and a substrate (6);
the first connecting plate (5) is used for installing the DC power supply filtering device (1) and the wave detection device (2), the substrate (6) is arranged on the first connecting plate (5), and the substrate (6) is used for installing the high-speed ADC collecting device (3) and the optical fiber conversion device (4).
3. The apparatus of claim 2, wherein the apparatus comprises: the shielding case (24) further comprises a second connecting plate (7) and a cover plate (8);
the second connecting plate (7) is fixed with one side of the base plate (6) far away from the first connecting plate (5) through a bolt, the cover plate (8) is arranged on one side of the first connecting plate (5) far away from the base plate (6), and the cover plate (8) is fixed with the first connecting plate (5) through a bolt.
4. The apparatus of claim 3, wherein the SAR value sensing and acquiring device comprises: first erection plates (9) for erecting the base plates (6) are arranged on the first connecting plate (5) and the second connecting plate (7), and the first erection plates (9) are fixed with the first connecting plate (5) through bolts.
5. The apparatus of claim 3, wherein the SAR value sensing and acquiring device comprises: and the first connecting plate (5) and the second connecting plate (7) are both provided with second erection plates (10) for erecting the cover plate (8), and the second erection plates (10) and the second connecting plate (7) are fixed through bolts.
6. The apparatus of claim 3, wherein the SAR value sensing and acquiring device comprises: the sealing structure is characterized in that first sealing plates (11) are symmetrically arranged on two sides of the first connecting plate (5) on the base plate (6), second sealing plates (12) are symmetrically arranged on two sides of the first connecting plate (5) on the cover plate (8), and the first sealing plates (11) and the second sealing plates (12) are mutually abutted and sealed.
7. The apparatus of claim 3, wherein the SAR value sensing and acquiring device comprises: the first connecting plate (5), the second connecting plate (7) and the base plate (6) are all provided with connecting pieces (13), and the connecting pieces (13) are provided with wires (14) used for being communicated with the connecting pieces (13).
8. The apparatus of claim 7, wherein the SAR value sensing and acquiring device comprises: both ends of the lead (14) are provided with conductive pins (15) sleeved on the connecting piece (13), and the connecting piece (13) is in threaded connection with a connecting ring (16) used for fixing the conductive ring.
9. The apparatus of claim 2, wherein the apparatus comprises: still be provided with conversion line (17) of being connected with optic fibre conversion equipment (4) on high-speed ADC collection system (3), be provided with on base plate (6) and supply fixed block (18) of conversion line (17) to fix, still be provided with connecting block (19) on fixed block (18), be provided with ribbon (20) that are used for fixed conversion line (17) on connecting block (19).
10. The apparatus of claim 9, wherein the apparatus comprises: the connecting device is characterized in that a connecting seat (21) is arranged on the connecting block (19), a through hole (22) for the binding belt (20) to penetrate through is formed in the connecting seat (21), and a reinforcing rib (23) mutually connected with the connecting seat (21) is further arranged on the connecting block (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023229324.2U CN214174598U (en) | 2020-12-28 | 2020-12-28 | SAR value sensing and collecting device of magnetic resonance system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023229324.2U CN214174598U (en) | 2020-12-28 | 2020-12-28 | SAR value sensing and collecting device of magnetic resonance system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214174598U true CN214174598U (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023229324.2U Active CN214174598U (en) | 2020-12-28 | 2020-12-28 | SAR value sensing and collecting device of magnetic resonance system |
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|---|---|
| CN (1) | CN214174598U (en) |
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