CN107255789A - A kind of magnetic resonance system and its coil-end part, main frame end pieces - Google Patents
A kind of magnetic resonance system and its coil-end part, main frame end pieces Download PDFInfo
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- CN107255789A CN107255789A CN201710409430.2A CN201710409430A CN107255789A CN 107255789 A CN107255789 A CN 107255789A CN 201710409430 A CN201710409430 A CN 201710409430A CN 107255789 A CN107255789 A CN 107255789A
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- identification code
- electrically connected
- coil
- access
- local coil
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The embodiment of the invention discloses a kind of magnetic resonance system and its coil-end part, main frame end pieces.The magnetic resonance system includes：Coil-end part and main frame end pieces, coil-end part includes at least one local coil, and correspond the identification code memory set with local coil, identification code memory is used for the identification code for storing corresponding local coil, any local coil can be electrically connected by least one signal transmssion line with main frame end pieces, and identification code memory is multiplexed at least one signal transmssion line；Main frame end pieces include detection circuit for access and Logic control module, detection circuit for access and Logic control module can be electrically connected with the signal transmssion line of multiplexing, and detection circuit for access, for detecting whether there is local coil access, Logic control module is used to read identification code from identification code memory corresponding with local coil when detection circuit for access has detected local coil access.The embodiment of the present invention can reduce the use of signal wire, cost-effective.
Description
Technical field
The present invention relates to mr imaging technique, more particularly to a kind of magnetic resonance system and its coil-end part, host side
Part.
Background technology
Magnetic resonance imaging (magnetic resonance imaging, abbreviation MRI) system is commonly used for health care
Field, i.e., occurred nuclear magnetic resonance using hydrogen nuclei in tissue (proton) by the excitation of radio-frequency pulse in magnetic field and show
As producing magnetic resonance signal, being handled by electronic computer, reconstruct the imaging technique of the image of a certain aspect of human body.Magnetic is total to
The general principle of imaging of shaking is：The atom of some protons containing odd number in tissue, such as hydrogen atom can spin motion, and
Magnetic moment is produced, can be seen as under some small magnets, normal condition, the spin direction arrangement of those small magnets is irregular, but solid
Determine to produce under main field effect and align；Now, when the radio-frequency pulse of additional one frequency identical with main field, these
Hydrogen atom absorbs certain energy and produces resonance, and spin direction deflects under radio-frequency pulse effect, in aligned transfer, that is, sends out
Electromagnetic induction phenomenon is given birth to；After radio-frequency pulse disappears, these hydrogen atoms are all restored to original state, in recovery process, release
Exoergic amount and change spin direction, now sample to the signal that these hydrogen atoms are produced, and then utilize the letter of these collections
Number carry out image reconstruction, it is possible to obtain the image of tissue.
In said process, radio-frequency coil according to function can be divided into radio-frequency sending coil for launching radiofrequency signal and
The RF receiving coil of collecting magnetic resonance signal.RF receiving coil must could obtain higher noise close proximity to patient
Than, image quality is improved, therefore radio-frequency coil can be divided into body radio-frequency coil and local coil again according to structure；Due to body radio frequency
Coil distance patient is farther out, it is impossible to obtains higher signal to noise ratio, therefore have devised the local line suitable for each position of human body
Circle, such as head coil (neck coil), spine coil, belly coil, lower main pole winding etc., local coil is generally radio frequency and connect
These local coils, each position of human body is coated in scanning, therefore can be obtained more closer to scanned position by take-up circle
High signal to noise ratio.
, it is necessary to can not be used with using correct local coil, because not when human body different parts are scanned
When the different scanning sequences of local coil correspondence of same type, radio-frequency sending coil are working, radio-frequency sending coil hair
The design parameters such as great power are penetrated, can not only ensure image quality from correct local coil, also ensure that patient's
Safety, it is to avoid radio frequency absorption rate is excessive to cause harm to patient.Therefore, it is necessary to recognize coil in systems in conventional scanning process
Access and taking-up state, including the normal plug before and after scanning, and interface such as loosens at the abnormal plug field in scanning process
Scape.
In order to ensure that receiving coil is not used with, best implementation method is to each unique identification of local coil one
Code, can recognize it is which local coil immediately by the identification code.Stored in the prior art using built-in in local coil
Device, passes through SPI (Serial Peripheral Interface, serial peripheral interface bus) or I2C (Inter-
Integrated Circuit, IC bus) bus distinguishes local coil to read the identification code stored in memory.
This that identification code identification and its read functions are individually made into a link, the link can thorough coil, cable and control electricity
Road, now needs to take multiple interfaces and signal wire.
The content of the invention
The embodiment of the present invention provides a kind of magnetic resonance system and its coil-end part, main frame end pieces, to reduce signal wire
Use, it is cost-effective.
In a first aspect, the embodiments of the invention provide a kind of magnetic resonance system, including coil-end part and main frame end pieces,
The coil-end part and the main frame end pieces can be electrically connected by signal transmssion line；
The coil-end part includes at least one local coil, and corresponds the knowledge set with the local coil
Other code memory, the identification code memory is used for the identification code for storing the corresponding local coil, any local line
Circle can be electrically connected by least one signal transmssion line with the main frame end pieces, the identification code memory multiplexing at least one
Signal transmssion line；
The main frame end pieces include detection circuit for access and Logic control module, the detection circuit for access and logic control
Molding block can be electrically connected with the signal transmssion line of multiplexing, and the detection circuit for access is for detecting whether there is local line
Circle access, the Logic control module be used for when detection circuit for access has detected local coil access from the local line
Identification code is read in the corresponding identification code memory of circle.
Further, the main frame end pieces also include switching switch, wherein, it is described switching switch control end with it is described
Logic control module is electrically connected, and the input of the switching switch is electrically connected with the signal transmssion line being multiplexed, for connecing
Enter detection-phase, the detection circuit for access is electrically connected with the signal transmssion line being multiplexed, and rank is read in identification code
Section, the Logic control module is electrically connected with the signal transmssion line being multiplexed.
Further, when including at least two local coils, each described identification code memory multiplexing is corresponding
Local coil a bars transmission line, and different identification code memory is multiplexed different signal transmssion lines.
Further, the detection circuit for access includes：Comparator, the first wave filter and first resistor, wherein, the ratio
First input end compared with device is electrically connected with the first end of first wave filter, the second input access reference of the comparator
Voltage, the output end of the comparator is electrically connected with the Logic control module, the second end of first wave filter with it is described
Switching switch electrical connection, the first end of the first resistor is connected with voltage source, and the second end of the first resistor is cut with described
Change the input electrical connection of switch；
The coil-end part also includes second resistance, wherein, the first end of the second resistance is deposited with the identification code
Reservoir is electrically connected, the second end ground connection of the second resistance.
Further, when including at least two local coils, the corresponding identification code memory of all local coils
It is multiplexed same signal transmssion line.
Further, the detection circuit for access includes：Analog-digital converter, operational amplifier, the second wave filter and the 3rd
Resistance, wherein, the output end of the analog-digital converter is electrically connected with the Logic control module, the input of the analog-digital converter
End is electrically connected with the output end of the operational amplifier, the input of the operational amplifier and the first of second wave filter
Second end of end electrical connection, the second end of second wave filter, and the 3rd resistor is electrically connected with the switching switch
Connect, the first end of the 3rd resistor is connected with voltage source；
The coil-end part also includes the 4th resistance, wherein, the first end of the 4th resistance is deposited with the identification code
Reservoir is electrically connected, the second end ground connection of the 4th resistance.
Further, the main frame end pieces also include the first inductance and the first electric capacity, wherein, the of first inductance
One end, and the first end of first electric capacity are electrically connected with the switching switch, and the second end of first inductance is with answering
The signal transmssion line electrical connection, the second end ground connection of first electric capacity.
Further, the coil-end part also includes the second inductance and the second electric capacity, wherein, the of second inductance
One end, and the first end of second electric capacity are electrically connected with the identification code memory, the second end of second inductance
Electrically connected with the signal transmssion line of multiplexing, the second end ground connection of second electric capacity.
Further, the main frame end pieces also include the 5th resistance, wherein the first end of the 5th resistance with it is described
Logic control module is electrically connected, and the second end of the 5th resistance is electrically connected with the signal transmssion line being multiplexed；
The coil-end part also includes the 6th resistance, wherein the first end of the 6th resistance is stored with the identification code
Device is electrically connected, and the second end of the 6th resistance is electrically connected with the signal transmssion line being multiplexed.
Further, the main frame end pieces also include radio-frequency signal processing module, are electrically connected with the signal transmssion line,
For receiving the radiofrequency signal of the local coil, and handled.
Further, the identification code memory is integrated in corresponding local coil.
Second aspect, the embodiment of the present invention additionally provides a kind of coil-end part of magnetic resonance system, including at least one
Local coil, and the identification code memory set is corresponded with the local coil,
The identification code memory is used for the identification code for storing the corresponding local coil, and any local coil can
Electrically connected by least one signal transmssion line with main frame end pieces, the identification code memory is multiplexed the transmission of at least one signal
Line.
The third aspect, the embodiment of the present invention additionally provides a kind of main frame end pieces of magnetic resonance system, including access detection
Circuit and Logic control module,
The detection circuit for access and Logic control module are electrically connected with the signal transmssion line of multiplexing, and the access inspection
Slowdown monitoring circuit is with having detected whether that local coil accesses, and the Logic control module is used to detect part in detection circuit for access
When coil is accessed identification code is read from identification code memory corresponding with the local coil.
The technical scheme of the embodiment of the present invention, is electrically connected by making identification code memory be multiplexed local coil with main frame end pieces
At least one signal transmssion line connect, solves identification code identification and its read functions individually making a link, the link
Can thorough coil, cable and control circuit, it is necessary to the problem of taking multiple interfaces and signal wire, to reduce making for signal wire
With cost-effective.
Brief description of the drawings
Fig. 1 is a kind of structural representation of magnetic resonance system provided in an embodiment of the present invention；
Fig. 2 is the structural representation of another magnetic resonance system provided in an embodiment of the present invention；
Fig. 3 is the structural representation of another magnetic resonance system provided in an embodiment of the present invention；
Fig. 4 is the structural representation of another magnetic resonance system provided in an embodiment of the present invention；
Fig. 5 is the structural representation of another magnetic resonance system provided in an embodiment of the present invention；
Fig. 6 is the structural representation of another magnetic resonance system provided in an embodiment of the present invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Embodiment one
The embodiment of the present invention one provides a kind of magnetic resonance system, as shown in figure 1, the magnetic resonance system includes coil-end part
110 and main frame end pieces 120, the coil-end part 110 and the main frame end pieces 120 can be electrically connected by signal transmssion line
Connect.
Wherein, the coil-end part 110 include at least one local coil 111, and with the local coil 111 1
The one identification code memory 112 being correspondingly arranged, the identification code memory 112 is used to store the corresponding local coil 111
Identification code, any local coil 111 can be electrically connected by least one signal transmssion line with the main frame end pieces 120
Connect, the identification code memory 112 is multiplexed at least one signal transmssion line.Show that any local coil 111 can pass through in Fig. 1
The structural representation that one bars transmission line is electrically connected with main frame end pieces 120.
It should be noted that the local coil 111 can be head coil, neck coil, neck coil, body portion coil, four limbs
Coil, shoulder coil, spine coil or pin step on the line circle etc..Each local coil 111 includes at least one receiving unit, for connecing
The radio frequency induction signal from human body is received, can be electrically connected with main frame end pieces 120 by least one radio frequency signal transmission line, respectively
Receiving unit can be electrically connected with main frame end pieces 120 by a radio frequency signal transmission line.Each identification He of code memory 112
One receiving unit is electrically connected with same radio frequency signal transmission line, and the receiving unit can be part corresponding with recognizing code memory
In in coil 111 or other local coils 111.The identification code can be binary number, different local coils
The different identification code of correspondence.The identification code memory 112 can be EEPROM (EEPROM).If the knowledge
Other code memory 112 is electrically connected with a wherein bars transmission line, then the identification code memory 112 is multiplexed the signal transmssion line,
The signal transmssion line can be used for transmission radio frequency induction signal corresponding with identification code to main frame end pieces 120, and for transmitting
Data signal to main frame end pieces 120 Logic control module 122.Local coil 111 and corresponding identification code memory
112 can access or take out from magnetic resonance system simultaneously, i.e. local coil 111 and corresponding identification code memory 112 can
It is connected or disconnects with signal transmssion line simultaneously.The signal transmssion line can be coaxial cable.The frequency of radio frequency induction signal is higher.Pass
The frequency of defeated data signal corresponding with identification code is relatively low.If signal transmssion line is not re-used, the signal transmssion line is only used
Transmitted in by radio frequency induction signal of the receiving unit reception from human body to main frame end pieces 120.
Wherein, the main frame end pieces 120 include detection circuit for access 121 and Logic control module 122, the access inspection
Slowdown monitoring circuit 121 and Logic control module 122 can be electrically connected with the signal transmssion line of multiplexing, and the detection circuit for access
121 for detecting whether there is local coil 111 to access, and the Logic control module 122 is used to detect in detection circuit for access 121
To have local coil 111 access when from it is corresponding with the local coil 111 identification code memory 112 in read identification code, from
And the local coil 111 of access is determined according to identification code.
It should be noted that when there is the access of local coil 111, such as can be head coil access, then access detection is electric
Road 121 can detect that local coil 111 is accessed, and can make Logic control module 122 from identification corresponding with the local coil 111
Identification code is read in code memory 112, to determine the local coil of access as head coil according to identification code.When there is local coil
During 111 disconnection, for example, can be that neck coil disconnects, then detection circuit for access 121 can detect that local coil disconnection, can make to patrol
Collect control module 122 and read identification code from the corresponding identification code memory 112 of local coil 111 accessed, and read not
To or without read the corresponding identification code recognized in code memory 112 of the local coil 111 disconnected, to determine the part disconnected
Coil is neck coil, or determines still to keep the local coil of access.The communication protocol that identification code is used when reading is monobus (1-
Wire) agreement, passes through the functions such as data exchange, the control in a data lines completion system.Due to memory it is basic 1 second it
Interior complete to read just can be with, therefore can carry out the reading of low speed.
Optionally, as shown in Fig. 2 the identification code memory 112 is integrated in corresponding local coil 111.Fig. 2
In exemplary meeting go out local coil and include a receiving unit, receiving unit 113 is passed with identification code memory 112 with same signal
Defeated line electrical connection.
The technical scheme of the present embodiment, by making identification code memory be multiplexed what local coil was electrically connected with main frame end pieces
At least one signal transmssion line, solves identification code identification and its read functions individually making a link, the link can be passed through
Threading circle, cable and control circuit are, it is necessary to which the problem of taking multiple interfaces and signal wire, to reduce the use of signal wire, saves
About cost.
Embodiment two
The embodiment of the present invention two provides a kind of magnetic resonance system, and the present embodiment is optimized based on above-described embodiment,
Referring to Fig. 3, specifically described main frame end pieces 120 also include switching switch 123, wherein, the control end of the switching switch 123
Electrically connected with the Logic control module 122, the input of the switching switch 123 is electrically connected with the signal transmssion line being multiplexed
Connect, in access detection-phase, the detection circuit for access 121 to be electrically connected with the signal transmssion line being multiplexed, and
The stage is read in identification code, the Logic control module 122 is electrically connected with the signal transmssion line being multiplexed.
It should be noted that access detection-phase is to have detected whether that local coil 111 is switched in or out the stage.Identification code
The reading stage is that Logic control module 122 reads the identification code stage from the corresponding identification code memory 112 of local coil 111.
Logic control module 122 can control the connection situation of the input of switching switch 123, can include the defeated of switching switch 123
Enter end to connect with the first output end, i.e., detection circuit for access 121 is electrically connected with the signal transmssion line being multiplexed；Either switching is switched
123 input and the second output end are connected, i.e., Logic control module 122 is electrically connected with the signal transmssion line being multiplexed.By drawing
Enter switching switch, the use of the components such as circuit upper filter part can be saved.
The technical scheme of the present embodiment provide a kind of magnetic resonance system, the embodiment on the basis of above-described embodiment,
By introducing switching switch so that in access detection-phase, detection circuit for access is electrically connected with the signal transmssion line being multiplexed, with
And the stage is read in identification code, Logic control module is electrically connected with the signal transmssion line being multiplexed, identification code memory is multiplexed
At least one signal transmssion line that local coil is electrically connected with main frame end pieces, is solved identification code identification and its read functions
Individually make a link, the link can thorough coil, cable and control circuit, it is necessary to take multiple interfaces and signal wire
Problem, it is cost-effective to reduce the use of signal wire.
Embodiment three
A kind of magnetic resonance system that the embodiment of the present invention three is provided, the present embodiment is carried out excellent based on above-described embodiment
Change, referring to Fig. 4, be specifically when including at least two local coils 111, each it is described identification code memory 112 multiplexing with
One bars transmission line of its corresponding local coil 111, and different identification code memories 112 is multiplexed different signal transmission
Line.
It should be noted that a bars of the corresponding local coil 111 of the identification code memory 112 multiplexing is passed
Defeated line, the signal transmssion line of the multiplexing can be the transmitting radio frequency signal of the receiving unit in corresponding local coil to main frame
The signal transmssion line of end pieces, the receiving unit can be any receiving unit in corresponding local coil.
Optionally, as shown in figure 4, the detection circuit for access includes：Comparator Cmp, the first wave filter Filter1 and
One resistance R1, wherein, the first input end of the comparator Cmp is electrically connected with the first end of the first wave filter Filter1,
The second input access reference voltage of the comparator Cmp, output end and the Logic control module of the comparator Cmp
122 electrical connections, the second end of the first wave filter Filter1 is electrically connected with the switching switch 123, the first resistor R1
First end be connected with voltage source, the second end of the first resistor R1 with it is described switching switch 123 input electrically connect；
The coil-end part 110 also includes second resistance R2, wherein, the first end of the second resistance R2 is known with described
Other code memory 112 is electrically connected, the second end ground connection of the second resistance R2.
It should be noted that the detection circuit for access, switching switch 123 are corresponded with local coil 111 and set.Set
Reference voltage Vref is between voltage source voltage vcc and R2*Vcc/ (R1+R2).Comparator Cmp first input end and
Two inputs can be positive input and reverse input end respectively, or reverse input end and positive input.To compare
Exemplified by device Cmp first input end and the second input can be respectively positive input and reverse input end, in access detection
In the stage, when local coil 111 does not access magnetic resonance system, the control switching of Logic control module 122 switch 123 opens switching
The input and the first output end for closing 123 are connected so that the first wave filter Filter1 the second end and the signal transmssion line of multiplexing
Electrical connection, the voltage of comparator Cmp positive input is Vcc, and more than the voltage of reverse input end, therefore comparator Cmp's is defeated
Go out end output high level；When local coil 111 accesses magnetic resonance system, the voltage of comparator Cmp positive input is R2*
Vcc/ (R1+R2), less than the voltage of reverse input end, therefore comparator Cmp output end exports low level, Logic control module
122 control switching switches, make switching switch 123 input and the connection of the second output end, make Logic control module 122 and multiplexing
Signal transmssion line electrical connection, with the local coil 111 for reading the access it is corresponding identification code memory 112 in identification code.
Similarly, when local coil 111 from magnetic resonance system by being linked into taking-up when, comparator Cmp output end is become by output low level
For output high level.Therefore Logic control module 122 can have been known whether according to the upset situation of the level of the output end of comparator
Local coil 111 is accessed or taken out, and then controls the status of electrically connecting of switching switch 123, and reads the local coil of the access
Identification code in corresponding identification code memory.First wave filter Filter1 is used to filter out residual noise and radio frequency induction signal.
The technical scheme of the present embodiment provide a kind of magnetic resonance system, the embodiment on the basis of above-described embodiment,
By making a bars transmission line of corresponding local coil that identification code memory is multiplexed, and the storage of different identification code
Device is electrically connected from different signal transmssion lines, solves identification code identification and its read functions individually making a link, should
Link can thorough coil, cable and control circuit, it is necessary to the problem of taking multiple interfaces and signal wire, to reduce signal wire
Use, it is cost-effective.
Example IV
The embodiment of the present invention four provides a kind of magnetic resonance system, and the present embodiment is optimized based on above-described embodiment,
It is specifically all local coils 111 corresponding identification code storage when including at least two local coils 111 referring to Fig. 5
Device 112 is multiplexed same signal transmssion line.
Wherein, the corresponding identification code memory 112 of all local coils 111 is electrically connected with same signal transmssion line.Should
Signal transmssion line can be the corresponding signal transmssion line of any receiving unit 113 in any local coil 111.
Optionally, as shown in figure 5, the detection circuit for access includes：Analog-digital converter ADC, operational amplifier opamp,
Second wave filter Filter2 and 3rd resistor R3, wherein, the output end of the analog-digital converter ADC and the logic control mould
Block 122 is electrically connected, and the input of the analog-digital converter ADC is electrically connected with the output end of the operational amplifier opamp, described
Operational amplifier opamp input is electrically connected with the first end of the second wave filter Filter2, second wave filter
Filter2 the second end, and electrically connected with the input that 3rd resistor R3 the second end switchs 123 with the switching, institute
The first end for stating 3rd resistor R3 is connected with voltage source；
The coil-end part 110 also includes the 4th resistance R4, wherein, the first end of the 4th resistance R4 is known with described
Other code memory 112 is electrically connected, the second end ground connection of the 4th resistance R4.
It should be noted that in access detection-phase, when the N number of access of local coil 111 magnetic resonance system, N+
When 1 local coil 111 does not access magnetic resonance system, the control switching of Logic control module 122 switch 123 makes switching switch 123
Input and the first output end connect so that the second wave filter Filter2 the second end with multiplexing signal transmssion line be electrically connected
Connect, the voltage at the second wave filter Filter2 the second end is R4*Vcc/ (N*R3+R4)；When the N+1 local coil 111 is accessed
During magnetic resonance system, the voltage at the second wave filter Filter2 the second end is R4*Vcc/ [(N+1) * R3+R4], therefore the second filtering
The voltage at device Filter2 the second end will reduce, then the input voltage of analog-digital converter ADC input will reduce, and modulus turns
The digital quantity of the output of parallel operation ADC output end will reduce, the control switching switch of Logic control module 122, switching is switched 123
Input and the second output end connect, make Logic control module 122 with multiplexing signal transmssion line electrically connect, it is all to read
Identification code in the corresponding identification code memory 112 of local coil 111 of access.Similarly, when local coil 111 is from magnetic resonance system
When system is by being linked into taking-up, the input voltage of analog-digital converter ADC input will increase, analog-digital converter ADC output end
Output digital quantity will increase, Logic control module 122 control switching switch, make Logic control module 122 with multiplexing letter
Number transmission line electrical connection, with the identification code in the corresponding identification code memory 112 of the local coil 111 for reading all accesses.Therefore
Logic control module 122 can have been known whether according to the situation of change of the digital quantity of the output of analog-digital converter ADC output end
Local coil 111 is accessed or taken out, and then controls the status of electrically connecting of switching switch 123, and reads the local line of all accesses
The identification code enclosed in 111 corresponding identification code memories 112.Second wave filter Filter2 is used to filter out residual noise and radio frequency
Induced signal.Operational amplifier opamp can be that follower, i.e. amplification coefficient are set to 1 or play amplification work
With amplification coefficient is set greater than into 1.
It should be noted that if magnetic resonance system includes M local coil, analog-digital converter ADC only need to be to M kind voltages
Rank is changed, to distinguish the access and taking-up of local coil, compared to the access that local coil is distinguished with voltage level
State (needs 2MPlant voltage level), voltage span can be increased.
Optionally, main frame end pieces 120 also include the 7th resistance R7, and first end and the voltage source of the 7th resistance R7 connect
Connect, the second end and the Logic control module 122 of the 7th resistance R7, and the signal transmssion line of multiplexing are electrically connected
Connect.
It should be noted that 3rd resistor R3 and the 4th resistance R4 resistance are much larger than the 7th resistance R7 resistance.
The technical scheme of the present embodiment provide a kind of magnetic resonance system, the embodiment on the basis of above-described embodiment,
Recognize that code memory is electrically connected with same signal transmssion line by the way that all local coils are corresponding, solve identification code
Identification and its read functions individually make a link, and link meeting thorough coil, cable and control circuit are, it is necessary to take many
It is the problem of individual interface and signal wire, cost-effective to reduce the use of signal wire.
Embodiment five
The embodiment of the present invention five provides a kind of magnetic resonance system, and the present embodiment is optimized based on above-described embodiment,
As shown in Figure 4 and Figure 5, specifically described main frame end pieces 120 also include the first inductance L1 and the first electric capacity C1, wherein, it is described
First inductance L1 first end is electrically connected with the input of the switching switch 123, the first end of the first electric capacity C1 and institute
Logic control module electrical connection is stated, the second end of the first inductance L1 is electrically connected with the signal transmssion line being multiplexed, described
First electric capacity C1 the second end ground connection.
Optionally, the coil-end part 110 also includes the second inductance L2 and the second electric capacity C2, wherein, second electricity
Feel L2 first end, and the first end of the second electric capacity C2 is electrically connected with the identification code memory 112, described second
Inductance L2 the second end is electrically connected with the signal transmssion line being multiplexed, the second end ground connection of the second electric capacity C2.
It should be noted that the first inductance L1 and the second inductance L2 is used to prevent radio frequency induction signal, so that will be in part
The level saltus step produced when coil access or taking-up and data signal and the stripping of radio frequency induction signal for reading identification code
Come.First electric capacity C1 and the second electric capacity C2 is used for signal line filter, the appropriate hopping edge for slowing down data signal.
Optionally, the main frame end pieces 120 also include the 5th resistance R5, wherein the first end of the 5th resistance R5 with
The Logic control module 122 is electrically connected, and the second end of the 5th resistance R5 is electrically connected with the signal transmssion line being multiplexed；
The coil-end part 110 also includes the 6th resistance R6, wherein the first end of the 6th resistance R6 is known with described
Other code memory 112 is electrically connected, and the second end of the 6th resistance R6 is electrically connected with the signal transmssion line being multiplexed.
It should be noted that the 5th resistance R5 and the 6th resistance R6 play a part of terminating and protected, so that local line
Enclose general safety plug.First resistor R1 and second resistance R2 resistance are much larger than the 5th resistance R5 and the 6th resistance R6 resistance
Value.
Embodiment six
The embodiment of the present invention six provides a kind of magnetic resonance system, and referring to Fig. 4, Fig. 5 and Fig. 6, the present embodiment is with above-mentioned implementation
Optimized based on example, specifically described main frame end pieces 120 also include radio-frequency signal processing module 124, with the signal
Transmission line is electrically connected, and for receiving the radiofrequency signal of the local coil 111, and is handled.
It should be noted that main frame end pieces 120 also include corresponding the set the 3rd with the signal transmssion line of multiplexing
Electric capacity C3 and circuit amplifier G, the 3rd electric capacity C3 first end are electrically connected with the signal transmssion line being multiplexed, and the of the 3rd electric capacity C3
Two ends are electrically connected with circuit amplifier G input, and circuit amplifier G output end and radio-frequency signal processing module 124 are electrically connected
Connect.
Coil-end part 110 also includes corresponding the 4th electric capacity C4 set with signal transmssion line and low noise circuit is put
Big device LNA, the 4th electric capacity C4 first end is electrically connected with signal transmssion line, and the 4th electric capacity C4 the second end is put with low noise circuit
Big device LNA output end electrical connection, the receiving unit of low noise circuit amplifier LNA input and local coil 111 is electrically connected
Connect.
It should be noted that the 3rd electric capacity C3 and the 4th electric capacity C4 is used for logical friendship blocking, by radio frequency induction signal and low speed
Data signal is kept apart.If signal transmssion line is not re-used, the 3rd electric capacity C3 and the 4th electric capacity C4 also can only set one.
Embodiment seven
The embodiment of the present invention provides a kind of preferred magnetic resonance system, as shown in figure 4, the present embodiment using above-described embodiment as
Basis is optimized, and specifically first resistor R1 first end is connected with voltage source Vcc, first resistor R1 the second end, and
Input of the 5th resistance R2 first end with switching switch 123 is electrically connected, the 5th resistance R5 the second end, and the first electricity
First end of the first end with the first inductance L1 for holding C1 be connected, and the first electric capacity C1 the second end is grounded, and the of the first inductance L1
Two ends are connected with the signal transmssion line being multiplexed；Second resistance R2 first end, and the 6th resistance R6 first end with identification
Code memory 112 is connected, second resistance R2 the second end ground connection, the 6th resistance R6 the second end, and the second electric capacity C2 the
First end of the one end with the second inductance L2 is connected, the second electric capacity C2 the second end ground connection, and the second inductance L2 the second end is with answering
Signal transmssion line is connected.
Embodiment eight
The embodiment of the present invention provides a kind of preferred magnetic resonance system, as shown in figure 5, the present embodiment using above-described embodiment as
Basis is optimized, specifically 3rd resistor R3 first end, and the 7th resistance R7 first end connects with voltage source Vcc
Connect, 3rd resistor R3 the second end is connected with the second output end of switching switch 123, the 7th resistance R7 the second end, Yi Ji
Five resistance R5 first end is connected with Logic control module 122, the 5th resistance R5 the second end, and the first electric capacity C1
First output end of the one end with switching switch 123 is connected, the first electric capacity C1 the second end ground connection, the first inductance L1 first end
It is connected with the input of switching switch 123, the first inductance L1 the second end is connected with the signal transmssion line being multiplexed；6th resistance R6
First end be connected with identification code memory 112, the 6th resistance R6 the second end, the second electric capacity C2 first end, and the 4th
First end of the resistance R4 first end with the second inductance L2 is connected, the second electric capacity C2 the second end ground connection, the 4th resistance R4's
Second end is grounded, and the second inductance L2 the second end is connected with the signal transmssion line being multiplexed.
Embodiment nine
The embodiment of the present invention nine provides a kind of coil-end part of magnetic resonance system, as shown in figure 1, the coil-end part
110 include at least one local coil 111, and correspond the identification code memory set with the local coil 111
112。
Wherein, the identification code memory 112 is used for the identification code for storing the corresponding local coil 111, Ren Yisuo
Stating local coil 111 can be electrically connected by least one signal transmssion line with main frame end pieces 120, the identification code memory
112 at least one signal transmssion lines of multiplexing.
Embodiment ten
The main frame end pieces for a kind of magnetic resonance system that the embodiment of the present invention ten is provided, as shown in figure 1, the main frame end pieces
120 include detection circuit for access 121 and Logic control module 122, the detection circuit for access 121 and Logic control module 122
Electrically connected with the signal transmssion line of multiplexing, and the detection circuit for access 121 is with having detected whether that local coil 111 accesses,
The Logic control module 122 be used for detection circuit for access 121 detected local coil 111 access when from the part
Identification code is read in the corresponding identification code memory 112 of coil 111.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art it is various it is obvious change,
Readjust, be combined with each other and substitute without departing from protection scope of the present invention.Therefore, although by above example to this
Invention is described in further detail, but the present invention is not limited only to above example, is not departing from present inventive concept
In the case of, other more equivalent embodiments can also be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (13)
1. a kind of magnetic resonance system, it is characterised in that including coil-end part and main frame end pieces, the coil-end part and institute
Stating main frame end pieces can be electrically connected by signal transmssion line；
The coil-end part includes at least one local coil, and corresponds the identification code set with the local coil
Memory, the identification code memory is used for the identification code for storing the corresponding local coil, and any local coil can
Electrically connected by least one signal transmssion line with the main frame end pieces, the identification code memory is multiplexed at least one signal
Transmission line；
The main frame end pieces include detection circuit for access and Logic control module, the detection circuit for access and logic control mould
Block can be electrically connected with the signal transmssion line of multiplexing, and the detection circuit for access is for detecting whether there is local coil to connect
Enter, the Logic control module be used for when detection circuit for access has detected local coil access from the local coil pair
Identification code is read in the identification code memory answered.
2. magnetic resonance system according to claim 1, it is characterised in that the main frame end pieces also include switching switch,
Wherein, the control end of the switching switch is electrically connected with the Logic control module, the input of the switching switch and multiplexing
The signal transmssion line electrical connection, for access detection-phase, by the detection circuit for access with multiplexing the signal
Transmission line is electrically connected, and reads the stage in identification code, by the Logic control module and the signal transmssion line electricity of multiplexing
Connection.
3. magnetic resonance system according to claim 1 or 2, it is characterised in that when including at least two local coils, often
One identification code memory is multiplexed a bars transmission line of corresponding local coil, and different identification code storages
Device is multiplexed different signal transmssion lines.
4. magnetic resonance system according to claim 3, it is characterised in that the detection circuit for access includes：Comparator,
One wave filter and first resistor, wherein, the first input end of the comparator is electrically connected with the first end of first wave filter,
The second input access reference voltage of the comparator, the output end of the comparator is electrically connected with the Logic control module
Connect, the second end of first wave filter is electrically connected with the switching switch, first end and the voltage source of the first resistor connect
Connect, the second end of the first resistor is electrically connected with the input of the switching switch；
The coil-end part also includes second resistance, wherein, the first end of the second resistance and the identification code memory
Electrical connection, the second end ground connection of the second resistance.
5. magnetic resonance system according to claim 1 or 2, it is characterised in that when including at least two local coils, institute
There is the corresponding identification code memory of the local coil to be multiplexed same signal transmssion line.
6. magnetic resonance system according to claim 5, it is characterised in that the detection circuit for access includes：Analog-to-digital conversion
Device, operational amplifier, the second wave filter and 3rd resistor, wherein, the output end of the analog-digital converter and the logic control
Module is electrically connected, and the input of the analog-digital converter is electrically connected with the output end of the operational amplifier, the operation amplifier
The input of device is electrically connected with the first end of second wave filter, the second end of second wave filter, and the described 3rd
Second end of resistance is electrically connected with the switching switch, and the first end of the 3rd resistor is connected with voltage source；
The coil-end part also includes the 4th resistance, wherein, first end and the identification code memory of the 4th resistance
Electrical connection, the second end ground connection of the 4th resistance.
7. magnetic resonance system according to claim 2, it is characterised in that the main frame end pieces also include the first inductance and
First electric capacity, wherein, the first end of first inductance, and the first end of first electric capacity are electric with the switching switch
Connection, the second end of first inductance is electrically connected with the signal transmssion line being multiplexed, the second termination of first electric capacity
Ground.
8. magnetic resonance system according to claim 1, it is characterised in that the coil-end part also include the second inductance and
Second electric capacity, wherein, the first end of second inductance, and the first end of second electric capacity are stored with the identification code
Device is electrically connected, and the second end of second inductance is electrically connected with the signal transmssion line being multiplexed, and the second of second electric capacity
End ground connection.
9. magnetic resonance system according to claim 1, it is characterised in that the main frame end pieces also include the 5th resistance,
The first end of wherein described 5th resistance is electrically connected with the Logic control module, the second end and the multiplexing of the 5th resistance
The signal transmssion line electrical connection；
The coil-end part also includes the 6th resistance, wherein the first end of the 6th resistance and the identification code memory electricity
Connection, the second end of the 6th resistance is electrically connected with the signal transmssion line being multiplexed.
10. magnetic resonance system according to claim 1, it is characterised in that the main frame end pieces also include radiofrequency signal
Processing module, is electrically connected with the signal transmssion line, for receiving the radiofrequency signal of the local coil, and is handled.
11. magnetic resonance system according to claim 1, it is characterised in that it is right with it that the identification code memory is integrated in
In the local coil answered.
12. the coil-end part of a kind of magnetic resonance system, it is characterised in that including at least one local coil, and with it is described
Local coil corresponds the identification code memory set,
The identification code memory is used for the identification code for storing the corresponding local coil, and any local coil can pass through
At least one signal transmssion line is electrically connected with main frame end pieces, and the identification code memory is multiplexed at least one signal transmssion line.
13. the main frame end pieces of a kind of magnetic resonance system, it is characterised in that including detection circuit for access and Logic control module,
The detection circuit for access and Logic control module are electrically connected with the signal transmssion line of multiplexing, and the access detection electricity
Road is with having detected whether that local coil accesses, and the Logic control module is used to detect local coil in detection circuit for access
During access identification code is read from identification code memory corresponding with the local coil.
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| CN107255789B (en) | 2020-09-11 |
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