CN206638797U - RF transmitter and MR imaging apparatus - Google Patents
RF transmitter and MR imaging apparatus Download PDFInfo
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- CN206638797U CN206638797U CN201720425042.9U CN201720425042U CN206638797U CN 206638797 U CN206638797 U CN 206638797U CN 201720425042 U CN201720425042 U CN 201720425042U CN 206638797 U CN206638797 U CN 206638797U
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Abstract
The utility model discloses a kind of RF transmitter and MR imaging apparatus.The device includes：Signal generator, it is used to produce radiofrequency signal；Shunt, it is used for RF signal power mean allocation caused by signal generator into the equal N roads signal of phase, and is input to RF Amplifier Module, and N is natural number, and N >=2；RF Amplifier Module, it includes N number of radio frequency amplifier, is amplified signal for the N roads signal from the shunt to be carried out into power amplification respectively, and the amplified signal is transmitted to radio-frequency sending coil；Radio-frequency sending coil, it is used to launch the amplified signal.Device of the present utility model does not need water cooling equipment, possesses modularization and autgmentability.
Description
Technical field
A kind of RF transmitter and MR imaging apparatus are the utility model is related to, it is especially a kind of to be used for nuclear magnetic resonance
The RF transmitter and MR imaging apparatus of system.
Background technology
MRI system is a kind of is widely used and the Medical Devices of positive effect.In magnetic resonance imaging system
In, radio system is its chief component.Radio system generally comprises RF emission system and radio-frequency receiving system.
Generally, magnetic nuclear resonance radio frequency emission system is included with lower part：Signal generator, radio frequency amplifier, radio-frequency transmissions
Coil.Radio-frequency sending coil is typically made up of two transmitting coils, and is divided into linearity coil and quadrature coil.Traditional radio frequency
Emission system is as shown in Figure 1.Traditional radio signal transmission process is described below.Transmission signal is provided by signal generator, should
Transmission signal is amplified into power splitter by radio frequency amplifier, by power splitter by radio frequency power output of radio frequency amplifier etc.
Give radio-frequency sending coil.
The Chinese patent application of Application No. 201620954461.7 disclose a kind of RF transmitter and magnetic resonance into
As system.The RF transmitter is used for multiple transmitting coils of MR imaging apparatus, including：One radio-frequency signal generator, its energy
Enough produce radio frequency initial signal；One radio frequency amplifier, it is connected to radio-frequency signal generator, and carrying out power to radio frequency initial signal puts
Greatly；One RF signal application device, its is integrally disposed body coil channel to channel adapter and each output with body coil channel to channel adapter
Hold the transmitting antenna level sensor of connection, the radio frequency after the amplification that the mixing of body coil channel to channel adapter exports from radio frequency amplifier
Initial signal and form orthogonal two-way radiofrequency signal, transmitting antenna level sensor detection from body coil channel to channel adapter export
The power of each radiofrequency signal be the first power, radio frequency amplifier and either one of radio-frequency signal generator or RF signal application device collection
Into setting.
The Chinese patent application of Application No. 201410635381.0 discloses a kind of magnetic resonance imaging system, including radio frequency
Transmitting chain module, radio frequency reception chain module, radio frequency coil assemblies and without magnetic switch power supply.Radio-frequency transmissions chain module includes being used for
The radio frequency amplifier of radio-frequency pulse is provided.Radio frequency coil assemblies are used to launch radiofrequency signal according to the radio-frequency pulse.Without magnetic switch
Power supply is arranged in the scanning room of the magnetic resonance imaging system and for the radio-frequency transmissions chain module and radio frequency reception chain module
At least one of power supply.
The shortcomings that above-mentioned RF transmitter, is：Radio frequency amplifier is power device, will be produced in the course of work many
Heat, particularly high power RF amplifier will produce more heats, thus need could be by heat using water-cooling pattern
Take away, to ensure the normal work of radio frequency amplifier, this just needs supporting water cooling equipment；Existing RF transmitter does not have
Standby modularization and autgmentability, the RF emission system of different capacity needs to be equipped with different radio frequency amplifiers, thus lacks and exchange
Property, cause exploitation and maintenance cost high.
Utility model content
One of the defects of in order to overcome prior art, the purpose of this utility model is to provide a kind of RF transmitter,
The device does not need water cooling equipment, possesses modularization and autgmentability.Further, the utility model is not increasing extra water cooling system
In the case of system, by the wind-cooling heat dissipating RF Amplifier Module of lower-wattage by combination, high-power radio-frequency power is produced, with full
The demand of sufficient different capacity.
Another purpose of the present utility model is to provide a kind of MR imaging apparatus, and it is developed and maintenance cost compares
It is low.
The utility model provides a kind of RF transmitter, and described device includes：
Signal generator, it is used to produce radiofrequency signal；
Shunt, it is used to believe RF signal power mean allocation caused by signal generator into the equal N roads of phase
Number, and RF Amplifier Module is input to, N is natural number, and N >=2；
RF Amplifier Module, it includes N number of radio frequency amplifier, for the N roads signal from the shunt to be entered respectively
Row power amplification is amplified signal, and the amplified signal is transmitted to radio-frequency sending coil；With
Radio-frequency sending coil, it is used to launch the amplified signal.
The utility model also provides another RF transmitter, and described device includes：
Signal generator, it is used to produce radiofrequency signal；
Shunt, it is used to believe RF signal power mean allocation caused by signal generator into the equal N roads of phase
Number, and RF Amplifier Module is input to, N is natural number, and N >=2；
RF Amplifier Module, it includes N number of radio frequency amplifier, for the N roads signal from the shunt to be entered respectively
Row power amplification is amplified signal, and the amplified signal is transmitted to combiner；
Combiner, it is used to be synthesized the amplified signal, obtains composite signal；With
Radio-frequency sending coil, it is used to launch the composite signal.
According to RF transmitter of the present utility model, it is preferable that described device does not include water cooling equipment.
According to RF transmitter of the present utility model, it is preferable that described device also includes wind-cooling heat dissipating equipment.
According to RF transmitter of the present utility model, it is preferable that N is 3~9 natural number.
According to RF transmitter of the present utility model, it is preferable that lead between the shunt and the radio frequency amplifier
Cross the input cable connection of length identical N bars.
According to RF transmitter of the present utility model, it is preferable that described radio-frequency sending coil is quadrature coil, linearly
Coil or multi-channel coil.
According to RF transmitter of the present utility model, it is preferable that the radio frequency amplifier and the radio-frequency sending coil
Between pass through length identical N bars output cord connect.
According to RF transmitter of the present utility model, it is preferable that lead between the radio frequency amplifier and the combiner
Cross the connection of length identical N bars output cord；Pass through length identical M bars between the combiner and the radio-frequency sending coil
Combiner output cord connects, and M is natural number, and N >=M >=1.
The utility model also provides a kind of MR imaging apparatus, and it includes RF Receiving Device and above-mentioned radio-frequency transmissions dress
Put.
RF transmitter of the present utility model includes shunt, some radio frequency amplifiers, signal generator and radio frequency hair
Ray circle.So there is no need to powerful radio frequency amplifier.RF transmitter of the present utility model need to only use air-cooled dissipate
Heat, without the amplifier heat dissipation problem of significant power demand can be met using water cooling equipment；And it can be met arbitrarily by combining
Power demand.
Brief description of the drawings
Fig. 1 is a kind of RF transmitter of prior art.
Fig. 2 is a kind of RF transmitter of the present utility model.
Fig. 3 is another RF transmitter of the present utility model.
Description of reference numerals is as follows：1- signal generators；2- shunts；3- RF Amplifier Modules；4- combiners；5- radio frequencies
Transmitting coil.
Embodiment
The utility model is further described with reference to specific embodiment, but the scope of protection of the utility model is simultaneously
Not limited to this.
RF transmitter of the present utility model includes signal generator, shunt, some radio frequency amplifiers and radio frequency hair
Ray circle；Combiner can also be included.
Signal generator of the present utility model is used to produce radiofrequency signal as initial signal.The signal generator can be adopted
With it is known in the art those.
Shunt of the present utility model is used for RF signal power mean allocation caused by signal generator into phase phase
Deng N roads signal, and be input to RF Amplifier Module.Shunt of the present utility model is also referred to as power divider, power splitter.
In the utility model, N is natural number, and N >=2.For example, N is 2,3,4,5,6,7,8,9,10 etc..According to of the present utility model
One embodiment, N are 3~9 natural number.
RF Amplifier Module of the present utility model includes N number of radio frequency amplifier, for the N roads from the shunt to be believed
Power amplification is carried out number respectively and is amplified signal, and the amplified signal is transmitted to radio-frequency sending coil.It is new in this practicality
In type, the quantity of radio frequency amplifier can be more than N, using as standby.In the utility model, N is natural number, and N >=2.Example
Such as, N 2,3,4,5,6,7,8,9,10 etc..According to an embodiment of the present utility model, N is 3~9 natural number.This reality
Can be low-power radio frequency amplifier with new radio frequency amplifier.The utility model uses some low-power radio frequency amplifier generations
For original high power RF amplifier, so as to reduce its requirement to radiating, thus do not need water cooling equipment can be normal
Operation.In addition, the utility model can realize modularization, its interchangeability is improved.
In the utility model, it is preferable that pass through length identical N bars between the shunt and the radio frequency amplifier
Input cable connection.For example, between shunt and the first radio frequency amplifier, the second radio frequency amplifier ... N radio frequency amplifiers
Connected respectively by inputting cable, input length of cable is respectively LI1、LI2、……LIn, then LI1=LI2=...=LIn.
In the utility model, connected between the radio frequency amplifier and the radio-frequency sending coil by length identical N bars output cord
Connect.For example, the first radio frequency amplifier, the second radio frequency amplifier ... N radio frequency amplifiers are sent out with corresponding first radio frequency respectively
Connected between ray circle, the second radio-frequency sending coil ... N radio-frequency sending coils by output cord, output cord length point
Wei not LO1、LO2……LOn, then LO1=LO2=...=LOn.Using above-mentioned setting, it is ensured that the input of radio frequency amplifier
Signal is consistent with the phase difference of output signal.
In the utility model, described radio-frequency sending coil is quadrature coil, linearity coil or multi-channel coil.When adopting
During with quadrature coil or linearity coil, it can be directly connected between the radio frequency amplifier and the radio-frequency sending coil.
RF transmitter of the present utility model can also include being used to the amplified signal being synthesized into conjunction
Into the combiner of signal.Like this, including N number of radio frequency amplifier RF Amplifier Module be used for by from the shunt
N roads signal carries out power amplification and is amplified signal respectively, and the amplified signal is transmitted to combiner；Radio-frequency sending coil
For the composite signal to be launched.Combiner of the present utility model can be power combiner device, can use known in the art
Those.
In the utility model, pass through length identical N bar input lines between the shunt and the radio frequency amplifier
Cable connects.For example, lead to respectively between shunt and the first radio frequency amplifier, the second radio frequency amplifier ... N radio frequency amplifiers
The connection of input cable is crossed, input length of cable is respectively LI1、LI2、……LIn, then LI1=LI2=...=LIn.In this practicality
In new, connected between the radio frequency amplifier and the combiner by length identical N bars output cord.For example, first
Radio frequency amplifier, the second radio frequency amplifier ... N radio frequency amplifiers respectively with the first combiner, the second combiner ... M
Connected between combiner by N bars output cord, M is natural number, and N >=M >=1.Preferably, M=N/2 or N/3.Output line
Cable length is respectively LO1、LO2……LOn, then LO1=LO2=...=LOn.According to an embodiment of the present utility model, M
=N/2, that is to say, that two radio frequency amplifiers are connected with a combiner.In the utility model, it is preferable that the combining
Connected between device and the radio-frequency sending coil by length identical M bar combiners output cord, M is natural number, and N >=M
≥1.Preferably, M=N/2 or N/3.For example, the first combiner, the second combiner ... M combiners respectively with it is corresponding
Connected, exported by output cord between first radio-frequency sending coil, the second radio-frequency sending coil ... M radio-frequency sending coils
Length of cable is respectively Lt1、Lt2……Ltm, then Lt1=Lt2=...=Ltm.Shunt, radio frequency amplification can so be ensured
Device, the input signal of combiner are consistent with the phase difference of output signal.
The utility model RF transmitter does not include water cooling equipment, only including wind-cooling heat dissipating equipment.The wind-cooling heat dissipating is set
It is ready for use on and the critical piece (such as radio frequency amplifier) of RF transmitter is cooled down.It can use known in the art
Those wind-cooling heat dissipating equipment.
The utility model also provides a kind of MR imaging apparatus, including RF Receiving Device and above-mentioned radio-frequency transmissions dress
Put.The two can be assembled into by MR imaging apparatus using assembly method known in the art, repeated no more here.
Embodiment 1
Fig. 2 is a kind of RF transmitter of the present utility model, including signal generator 1, shunt 2, radio frequency amplification mould
Block 3 and radio-frequency sending coil 5.Signal generator 1 produces radiofrequency signal.Shunt 2 is by radiofrequency signal caused by signal generator 1
Power averaging is distributed into the equal N roads signal of phase, is then input in RF Amplifier Module 3；Wherein, N is natural number, and N
≥2.RF Amplifier Module 3 includes N number of radio frequency amplifier, respectively the first radio frequency amplifier, the second radio frequency amplifier ... N
Radio frequency amplifier.N roads signal from shunt 2 is carried out power amplification and is amplified signal by these radio frequency amplifiers respectively,
And amplified signal is transmitted to radio-frequency sending coil 5.The radio-frequency sending coil is linearity coil.Radio-frequency sending coil 5 puts this
Big signal transmitting.Cable is inputted between shunt 2 and these radio frequency amplifiers by N bars to connect, their length is respectively
LI1、LI2、……LIn.Connected between these radio frequency amplifiers and radio-frequency sending coil 5 by N bars output cord, their length
Degree is respectively LO1、LO2……LOn.In the utility model, LI1=LI2=...=LIn, LO1=LO2=...=LOn.This
Sample can ensure that the input signal of radio frequency amplifier is consistent with the phase difference of output signal.The RF transmitter of the embodiment is not
Including water cooling equipment, only including wind-cooling heat dissipating equipment (not shown).
In this embodiment, the gain of single-channel RF amplifier is 70.78dB, and the output of signal generator 1 is 0dBm, warp
After crossing shunt 2, the input of the radio frequency amplifier in RF Amplifier Module 3 is -3dBm, after radio frequency amplifier amplifies, often
The power output on road is changed into 67.78dBm (6kW), and output radio-frequency power is directly then given into radio-frequency sending coil 5.Each road is penetrated
The input cable equal length of audio amplifier, the output cord length of each road radio frequency amplifier are also equal；Due to declining for cable etc.
Subtract and the phase error of radio frequency amplifier, can finally produce the radio frequency amplification effect equivalent to 10kW.
Embodiment 2
In addition to radio-frequency sending coil 5 is replaced with into quadrature coil, remaining part and annexation and the phase of embodiment 1
Together.
Embodiment 3
Fig. 3 is another RF transmitter of the present utility model, including the amplification of signal generator 1, shunt 2, radio frequency
Module 3, combiner 4 and radio-frequency sending coil 5.Signal generator 1 produces radiofrequency signal.Shunt 2 produces signal generator 1
RF signal power mean allocation into the equal N roads signal of phase, be then input in RF Amplifier Module 3；Wherein, N is
Natural number, and N >=2.RF Amplifier Module 3 includes N number of radio frequency amplifier, and respectively the first radio frequency amplifier, the second radio frequency are put
Big device ... N radio frequency amplifiers.N roads signal from shunt 2 is carried out power amplification and obtained by these radio frequency amplifiers respectively
Transmitted to amplified signal, and by the amplified signal to combiner 4.Combiner 4 is synthesized the amplified signal, obtains synthesis letter
Number.Radio-frequency sending coil 5 is used to launch the composite signal.
Cable is inputted between shunt 2 and these radio frequency amplifiers by N bars to connect, their length is respectively LI1、
LI2、……LIn.Pass through N bar output cords between these radio frequency amplifiers and M (M is natural number, and M=N/2) individual combiner 4
Connection, their length is respectively LO1、LO2……LOn.It is defeated by M bar combiners between combiner 4 and radio-frequency sending coil 5
Go out cable connection, their length is respectively Lt1、Lt2……Ltm.In the utility model, LI1=LI2=...=LIn,
LO1=LO2=...=LOn, Lt1=Lt2=...=Ltm.Every road shunt, radio frequency amplifier, synthesis can so be ensured
The input signal of device is consistent with the phase difference of output signal.The RF transmitter of the embodiment does not include water cooling equipment, only wraps
Include wind-cooling heat dissipating equipment (not shown).
The utility model is not limited to above-mentioned embodiment, in the case of without departing substantially from substantive content of the present utility model,
It may occur to persons skilled in the art that any deformation, improvement, replacement each fall within the scope of the utility model.
Claims (10)
1. a kind of RF transmitter, it is characterised in that described device includes：
Signal generator, it is used to produce radiofrequency signal；
Shunt, it is used for RF signal power mean allocation caused by signal generator into the equal N roads signal of phase, and
It is input to RF Amplifier Module, N is natural number, and N >=2；
RF Amplifier Module, it includes N number of radio frequency amplifier, for the N roads signal from the shunt to be carried out into work(respectively
Rate amplification is amplified signal, and the amplified signal is transmitted to radio-frequency sending coil；With
Radio-frequency sending coil, it is used to launch the amplified signal.
2. a kind of RF transmitter, it is characterised in that described device includes：
Signal generator, it is used to produce radiofrequency signal；
Shunt, it is used for RF signal power mean allocation caused by signal generator into the equal N roads signal of phase, and
It is input to RF Amplifier Module, N is natural number, and N >=2；
RF Amplifier Module, it includes N number of radio frequency amplifier, for the N roads signal from the shunt to be carried out into work(respectively
Rate amplification is amplified signal, and the amplified signal is transmitted to combiner；
Combiner, it is used to be synthesized the amplified signal, obtains composite signal；With
Radio-frequency sending coil, it is used to launch the composite signal.
3. RF transmitter according to claim 1 or 2, it is characterised in that described device does not include water cooling equipment.
4. RF transmitter according to claim 3, it is characterised in that described device is also set including wind-cooling heat dissipating
It is standby.
5. RF transmitter according to claim 1 or 2, it is characterised in that N is 3~9 natural number.
6. RF transmitter according to claim 1 or 2, it is characterised in that the shunt amplifies with the radio frequency
Cable is inputted between device by length identical N bars to connect.
7. RF transmitter according to claim 1 or 2, it is characterised in that described radio-frequency sending coil is orthogonal
Coil, linearity coil or multi-channel coil.
8. RF transmitter according to claim 1, it is characterised in that the radio frequency amplifier and the radio-frequency transmissions
Connected between coil by length identical N bars output cord.
9. RF transmitter according to claim 2, it is characterised in that the radio frequency amplifier and the combiner it
Between pass through length identical N bars output cord connect；It is identical by length between the combiner and the radio-frequency sending coil
The connection of M bar combiners output cord, M is natural number, and N >=M >=1.
10. a kind of MR imaging apparatus, it is characterised in that it includes RF Receiving Device and such as any one of claim 1~9
Described RF transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720425042.9U CN206638797U (en) | 2017-04-21 | 2017-04-21 | RF transmitter and MR imaging apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720425042.9U CN206638797U (en) | 2017-04-21 | 2017-04-21 | RF transmitter and MR imaging apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206638797U true CN206638797U (en) | 2017-11-14 |
Family
ID=60245962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720425042.9U Active CN206638797U (en) | 2017-04-21 | 2017-04-21 | RF transmitter and MR imaging apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206638797U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133551A (en) * | 2019-05-14 | 2019-08-16 | 上海联影医疗科技有限公司 | RF transmitter and magnetic resonance imaging system |
-
2017
- 2017-04-21 CN CN201720425042.9U patent/CN206638797U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133551A (en) * | 2019-05-14 | 2019-08-16 | 上海联影医疗科技有限公司 | RF transmitter and magnetic resonance imaging system |
| CN110133551B (en) * | 2019-05-14 | 2021-12-21 | 上海联影医疗科技股份有限公司 | Radio frequency transmitting device and magnetic resonance imaging system |
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