CN103852743A - Radio frequency coil monitoring method and device, test device, and magnetic resonance system - Google Patents
Radio frequency coil monitoring method and device, test device, and magnetic resonance system Download PDFInfo
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Abstract
A radio frequency coil monitoring method and device, a test device, and a magnetic resonance system are disclosed. The radio frequency coil monitoring method includes the following steps that: a to-be-tested radio frequency coil is accessed; a type of the to-be-tested radio frequency coil is recognized, and the type is corresponding to an encoding resistance value of the radio frequency coil; according to the type of the to-be-tested radio frequency coil, a threshold current of the to-be-tested radio frequency coil is determined; when a functional test of the to-be-tested radio frequency coil is carried out, a working current of the to-be-tested radio frequency coil in a test state is monitored; and when the working current exceeds the threshold current, an alarm is generated and a power supply is disconnected. The technical scheme solves the problem in the prior art that when the same threshold current is used to monitor the radio frequency coil with different numbers of units, the radio frequency coil and radio frequency coil test device cannot be protected to the maximum.
Description
Technical field
The present invention relates to mr imaging technique field, particularly a kind of method for supervising of radio-frequency coil and device, proving installation and magnetic resonance system.
Background technology
Magnetic resonance imaging (MRI, Magnetic Resonance Imaging) as the key areas of nuclear magnetic resonance application, because it has fabulous resolving power, imaging parameters that abundant diagnostic message can be provided, human body be there is no to the plurality of advantages such as ionization radiation injury human body soft tissue, magnetic resonance imaging system has become one of main tool of medical clinic applications.Radio-frequency coil, as the core component that receives signal in magnetic resonance system, according to the difference at the tested position of human body, is divided into different types: body flexible radio frequency coil, head radio-frequency coil, backbone radio-frequency coil, knee radio-frequency coil etc.Before radio-frequency coil directly contacts human body use, need to comprise performance tests such as transport property, radio-frequency coil type radio-frequency coil, determine the good of coil performance thereby whether meet the type coil standard by test parameters, guarantee that the radio-frequency coil after performance test normally uses.
Because the mistake of producing in magnetic resonance system process is welded the radio-frequency coil short circuit or other the unpredictable situation that cause, in the time that radio-frequency coil is tested, measuring current (occurring over-current phenomenon avoidance) when the electric current that flows through radio-frequency coil may exceed normal work, the operating voltage when operating voltage of radio-frequency coil proving installation certain module may be below or above normal work, affect the proper testing of radio-frequency coil, when serious, may damage components and parts and the radio-frequency coil proving installation of radio-frequency coil inside.Therefore, in to the process of radio frequency coil measurement, need to be to flowing through the electric current of radio-frequency coil and the operating voltage of the each module of radio-frequency coil proving installation is monitored.
In prior art, be that threshold current by radio-frequency coil is set and the threshold voltage of the each module of radio-frequency coil proving installation are realized to the monitoring of radio-frequency coil.In the time monitoring the operating voltage of the arbitrary module of radio-frequency coil proving installation and exceed threshold current below or above the measuring current of threshold voltage and/or radio-frequency coil, can stop immediately the test to radio-frequency coil.According to the requirement of magnetic resonance imaging system imaging signal to noise ratio (S/N ratio) (SNR, signal-to-noise ration), present radio-frequency coil is all to adopt multiunit project organization, and the number of unit difference of every type of radio-frequency coil is very large.Nearly tens of the radio-frequency coil number of unit for example having, and some coils only have a unit.But for dissimilar radio-frequency coil, threshold current of the prior art is all to adopt same default fixed value, this default fixed value is generally to determine according to the radio-frequency coil unit of maximum numbers.Therefore, for the few radio-frequency coil of number of unit, in test process, may there is the situation of overcurrent and/or short circuit, can not have been found in time, can not protect to greatest extent radio-frequency coil and radio-frequency coil proving installation.
More technical schemes about magnetic resonance system radio-frequency coil structure can application reference number be 201210225809.5, denomination of invention is a kind of Chinese patent application file of radio-frequency coil of NMR imaging instrument device.
Summary of the invention
What the present invention solved is to adopt same threshold current to monitor the caused problem that can not protect to greatest extent radio-frequency coil and radio-frequency coil proving installation to the radio-frequency coil of different numbers unit.
For addressing the above problem, the invention provides a kind of method for supervising of radio-frequency coil, comprising: access radio-frequency coil to be tested; The type that identifies radio-frequency coil to be tested described in the type identification of coding resistor on described radio-frequency coil to be measured and then definite radio-frequency coil, described type is corresponding with the coding resistance of radio-frequency coil; Determine the threshold current of described radio-frequency coil to be tested according to the type of described radio-frequency coil to be tested; In the time that described radio-frequency coil to be tested is carried out to functional test, monitor the working current of described radio-frequency coil to be tested under test mode, when described working current exceedes described threshold current, give the alarm and deenergization.
Optionally, also comprise: determine threshold voltage corresponding to each module that described radio-frequency coil to be tested is carried out to functional test.
Optionally, describedly determine that threshold voltage corresponding to each module that described radio-frequency coil to be tested is carried out to functional test comprises: operating voltage when described each module is normally worked deducts respectively voltage margin, to obtain corresponding respectively to the first threshold voltage of each module; Operating voltage when described each module is normally worked adds respectively voltage margin, to obtain corresponding respectively to the Second Threshold voltage of each module.
Optionally, the span of described voltage margin is 0.5V to 1V.
Optionally, also comprise: in the time that described radio-frequency coil to be tested is carried out to described functional test, monitor the operating voltage of described each module, when the operating voltage of arbitrary described module is lower than first threshold voltage corresponding to this module or higher than Second Threshold voltage corresponding to this module, give the alarm and deenergization.
Optionally, described radio-frequency coil to be tested comprises at least one unit.
Optionally, the type of the described radio-frequency coil to be tested of described identification comprises: the voltage of measuring described radio-frequency coil to be tested; Determine the coding resistance of described radio-frequency coil to be tested according to the voltage of described radio-frequency coil to be tested; The coding resistance of described radio-frequency coil to be tested is mated with the coding resistance of every kind of radio-frequency coil, to determine the identification code of described radio-frequency coil to be tested.
Optionally, described identification code is predefined according to the coding resistance of every kind of radio-frequency coil.
Optionally, the described type according to described radio-frequency coil to be tested is determined the threshold current of described radio-frequency coil to be tested, comprising: the number of unit of determining described radio-frequency coil to be tested according to the type of described radio-frequency coil to be tested; Working current by the each unit of described radio-frequency coil to be tested under normal condition and the number of unit of described radio-frequency coil to be tested multiply each other, to obtain the working current of described radio-frequency coil to be tested under normal condition; Working current by described radio-frequency coil to be tested under normal condition and the electric current allowance of described radio-frequency coil to be tested are added, to obtain described threshold current.
Optionally, the value of described electric current allowance is not more than 20mA.
For addressing the above problem, the present invention also provides a kind of supervising device of radio-frequency coil, comprising: linkage unit, for accessing radio-frequency coil to be tested; Recognition unit, for identifying the type of radio-frequency coil to be tested of described linkage unit access, described type is corresponding with the coding resistance of radio-frequency coil; Threshold current setting unit, for determining the threshold current of described radio-frequency coil to be tested according to the type of the radio-frequency coil described to be tested of described recognition unit identification; Current monitoring alarm unit, in the time that described radio-frequency coil to be tested is carried out to functional test, monitors the measuring current of described radio-frequency coil to be tested, when described measuring current exceedes described threshold current, gives the alarm and deenergization output.
The embodiment of the present invention also provides a kind of radio-frequency coil proving installation of the supervising device that comprises above-mentioned radio-frequency coil.
Method for supervising based on above-mentioned radio-frequency coil and device, the present invention also provides a kind of magnetic resonance system, and described magnetic resonance system comprises radio-frequency coil, also comprises: recognition unit, the type that is used for the described radio-frequency coil of identifying access, described type is corresponding with the coding resistance of radio-frequency coil; Threshold current setting unit, for determining the threshold current of described radio-frequency coil according to the type of the described radio-frequency coil of described recognition unit identification; Current monitoring alarm unit, in the time using described radio-frequency coil to test human body, monitors the working current of described radio-frequency coil, when described working current exceedes described threshold current, gives the alarm and deenergization.
Compared with prior art; the method for supervising of the radio-frequency coil that technical solution of the present invention provides and device; can identify the radio-frequency coil type to be tested of access; according to dissimilar radio-frequency coil, different threshold currents being set monitors radio-frequency coil; the less radio-frequency coil of number of unit of having avoided dissimilar radio-frequency coil to use same threshold current to cause occurred overcurrent and/or short circuit situation and can not found problem, thereby protected to greatest extent radio-frequency coil and radio-frequency coil proving installation.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the method for supervising of the radio-frequency coil of embodiment of the present invention;
Fig. 2 is the structural representation of the supervising device of the radio-frequency coil of the embodiment of the present invention.
Embodiment
Just as described in the background art, in the time that the radio-frequency coil in magnetic resonance system is tested, need to monitor the operating voltage of the working current of radio-frequency coil and the each module of radio-frequency coil proving installation, prevent that radio-frequency coil is because the situation of overcurrent and/or short circuit that occurs is damaged radio-frequency coil and radio-frequency coil proving installation.For dissimilar radio-frequency coil, prior art is all to adopt identical threshold current to monitor radio-frequency coil, can not protect to greatest extent radio-frequency coil and radio-frequency coil proving installation.Therefore, the inventor of the technical program considers, the radio-frequency coil type to be tested accessing by identification changes the threshold current of radio-frequency coil automatically according to the type of radio-frequency coil to be tested.
For above-mentioned purpose of the present invention, feature and advantage can more be become apparent, below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in detail.
Set forth in the following description a lot of details so that fully understand the present invention, implemented but the present invention can also adopt other to be different from alternate manner described here, therefore the present invention is not subject to the restriction of following public specific embodiment.
Fig. 1 is the schematic flow sheet of the method for supervising of the radio-frequency coil of embodiment of the present invention.With reference to figure 1, the method for supervising of described radio-frequency coil comprises:
Step S11: access radio-frequency coil to be tested;
Step S12: identify the type of described radio-frequency coil to be tested, described type is corresponding with the coding resistance of radio-frequency coil;
Step S13: the threshold current of determining described radio-frequency coil to be tested according to the type of described radio-frequency coil to be tested;
Step S14: in the time that described radio-frequency coil to be tested is carried out to functional test, monitor the working current of described radio-frequency coil to be tested under test mode, when described working current exceedes described threshold current, give the alarm and deenergization.
Based on the method for supervising of above-mentioned radio-frequency coil, the embodiment of the present invention also provides a kind of supervising device of radio-frequency coil, the structural representation of the supervising device of radio-frequency coil shown in Figure 2, and the supervising device of described radio-frequency coil comprises:
Recognition unit 22, for identifying the type of the radio-frequency coil to be tested 20 that described linkage unit 21 accesses, described type is corresponding with the coding resistance of radio-frequency coil;
Threshold current setting unit 23, determines the threshold current of described radio-frequency coil 20 to be tested for the type of the radio-frequency coil 20 described to be tested identified according to described recognition unit 22;
Current monitoring alarm unit 24, for in the time that described radio-frequency coil 20 to be tested is carried out to functional test, monitor the working current of described radio-frequency coil 20 to be tested under test mode, when described working current exceedes described threshold current, give the alarm and deenergization.
For better embodiments of the present invention being understood, the method for supervising below in conjunction with Fig. 1 and Fig. 2 to technical solution of the present invention radio-frequency coil and the principle of work of device describe.
As described in step S11, access radio-frequency coil to be tested.
As shown in Figure 2, by described linkage unit 21, described radio-frequency coil 20 to be tested is connected with the recognition unit 22 in radio-frequency coil supervising device.Particularly, described linkage unit 21 can be the cable of belt lacing, the joint of described cable is connected to the access that completes described radio-frequency coil 20 to be tested with the interface of described recognition unit 22.
As described in step S12, identify the type of described radio-frequency coil to be tested, described type is corresponding with the coding resistance of radio-frequency coil.
After the described radio-frequency coil 20 to be tested of access, can provide instruction by the external input device of the supervising device of radio-frequency coil, the type of the to be tested radio-frequency coil 20 of described recognition unit 22 to access is judged.In the present embodiment, described external input device can be keyboard, provides instruction by button.In other embodiments, described external input device can be also touch-screen, provides instruction by touch.The detailed process of type of identifying described radio-frequency coil 20 to be tested is as follows:
Measure the voltage of described radio-frequency coil 20 to be tested.Particularly, apply a scheduled current to described radio-frequency coil 20 to be tested by the voltage measurement unit in described recognition unit 22 and measure the voltage of described radio-frequency coil 20 to be tested in the time of logical described scheduled current;
Determine the coding resistance of described radio-frequency coil 20 to be tested according to the voltage of described radio-frequency coil 20 to be tested.Particularly, described radio-frequency coil 20 to be tested is connected with coding resistor.According to ohm formula voltage=resistance * electric current, the coding resistance determining unit in described recognition unit 22 can be determined the coding resistance of described radio-frequency coil 20 to be tested, the resistance that described coding resistance is described coding resistor;
The coding resistance of described radio-frequency coil 20 to be tested is mated with the coding resistance of every kind of radio-frequency coil, to determine the identification code of described radio-frequency coil 20 to be tested.Particularly, the matching unit in described recognition unit 22 has pre-defined the identification code of every kind of radio-frequency coil and the coding resistance of every kind of radio-frequency coil and the relation of described identification code.By the coding resistance of the coding resistance of described radio-frequency coil 20 to be tested and every kind of radio-frequency coil is compared, determine the identification code of described radio-frequency coil 20 to be tested, can know the type of described radio-frequency coil 20 to be tested.
As described in step S13, determine the threshold current of described radio-frequency coil to be tested according to the type of described radio-frequency coil to be tested.
Determine the number of unit of described radio-frequency coil 20 to be tested according to the type of described radio-frequency coil 20 to be tested.Particularly, matching unit by the unit number determining unit in described threshold current setting unit 23 from described recognition unit 22 obtains the identification code of described radio-frequency coil 20 to be tested, then according to the identification code of radio-frequency coil storing in advance and the corresponding relation of the number of unit of radio-frequency coil, export the number of unit of the identification code of corresponding described radio-frequency coil 20 to be tested;
Working current by the described each unit of radio-frequency coil 20 to be tested under normal condition and the number of unit of described radio-frequency coil 20 to be tested multiply each other, to obtain the working current of described radio-frequency coil 20 to be tested under normal condition.Particularly, by the coil current determining unit in described threshold current setting unit 23, by the described each unit of radio-frequency coil 20 to be tested, the working current under normal condition multiplies each other with the number of unit of the radio-frequency coil 20 described to be tested obtaining from described unit number determining unit, exports the working current of described radio-frequency coil 20 to be tested under normal condition;
Working current by described radio-frequency coil 20 to be tested under normal condition and the electric current allowance of described radio-frequency coil 20 to be tested are added, to obtain described threshold current.Particularly, by the superpositing unit in described threshold current setting unit 23, by the radio-frequency coil described to be tested of described coil current determining unit output, the working current under normal condition and the electric current allowance of described radio-frequency coil 20 to be tested are added, to determine described threshold current.
Suppose that the working current of each radio-frequency coil unit under normal condition is 10mA, in the present embodiment, the identification code of described radio-frequency coil 20 to be tested is " 6A ", the number of unit of the radio-frequency coil of described identification code " 6A " correspondence is 30, be that described radio-frequency coil 20 to be tested has 30 radio-frequency coil unit, the electric current allowance that described radio-frequency coil 20 to be tested is set is 15mA, and the threshold current of described radio-frequency coil 20 to be tested is: 30*10mA+15mA=315mA; Again for example, the identification code of described radio-frequency coil 20 to be tested is " 6B ", the number of unit of the radio-frequency coil of described identification code " 6B " correspondence is 1, be that described radio-frequency coil 20 to be tested only has 1 radio-frequency coil unit, the electric current allowance that described radio-frequency coil 20 to be tested is set is 15mA, and the threshold current of described radio-frequency coil 20 to be tested is: 1*10mA+15mA=25mA.Described electric current allowance is not more than 20mA conventionally, in the present embodiment, electric current allowance is 15mA, and those skilled in the art of the present technique know, in other embodiments also can be for being not more than other values of 20mA, specifically according to described each coil, the size of current in the time normally working and physical circuit are determined.
Further, in some cases, during such as production, there is welding mistake, cause some unit in radio-frequency coil to occur short circuit, or in other cases, occur for example to the power module that radio-frequency coil is carried out to the each module for power supply in the radio-frequency coil proving installation of functional test abnormal, in the time that radio-frequency coil is tested, described in carry out the operating voltage that the operating voltage of each module of functional test may be when normal.So the each module that needs threshold voltage setting unit radio-frequency coil to be carried out in the radio-frequency coil proving installation of functional test arranges a corresponding first threshold voltage and Second Threshold voltage.Particularly, described threshold voltage setting unit comprises the first setting unit and the second setting unit.Operating voltage when described the first setting unit is used for described each module normally to work deducts respectively voltage margin, to obtain first threshold voltage; Operating voltage when described the second setting unit is used for described each module normally to work adds respectively voltage margin, to obtain Second Threshold voltage.
Operating voltage when described each module of carrying out functional test is normally worked is different, for example, the operating voltage of the control module in radio-frequency coil proving installation is generally 5V, the operating voltage of the radio frequency amplifier module in radio-frequency coil proving installation is generally 10V, and therefore the voltage margin of described each module is also different.In actual applications, when described each module is normally worked, such as, owing to being subject to the impact of the factors such as external environment condition (temperature), voltage when described each module is normally worked also can produce minor fluctuations.Therefore voltage swing when, described voltage margin can normally be worked according to described each module and physical circuit are determined.In the present embodiment, the span of described voltage margin is 0.5V to 1V, the larger module of operating voltage during for normal work, the desirable higher value of described voltage margin, the less module of operating voltage during for normal work, the desirable smaller value of described voltage margin.For example, the voltage margin of described control module can be 0.5V, and correspondingly, the first threshold voltage of described control module is 4.5V, and Second Threshold voltage is 5.5V; The voltage margin of described radio frequency amplifier module can be 1V, and correspondingly, the first threshold voltage of described radio frequency amplifier module is 9V, and Second Threshold voltage is 11V.
As described in step S14, in the time that described radio-frequency coil to be tested is carried out to functional test, monitor the working current of described radio-frequency coil to be tested under test mode, when described working current exceedes described threshold current, give the alarm and deenergization.
After threshold voltage corresponding to the each module that sets the threshold current of described radio-frequency coil 20 to be tested and described radio-frequency coil 20 to be tested is carried out to functional test, described radio-frequency coil 20 to be tested is connected with radio-frequency coil proving installation, meanwhile, described radio-frequency coil supervising device technical solution of the present invention being provided is connected with described radio-frequency coil proving installation.Particularly, described radio-frequency coil 20 to be tested can, with reference to described radio-frequency coil 20 to be tested and the connected mode of described radio-frequency coil supervising device, use the cable of belt lacing to connect with the connected mode of described radio-frequency coil proving installation.In the present embodiment, described radio-frequency coil supervising device can exist alone, also can be integrated in the inside of described radio-frequency coil proving installation.No matter which kind of existence form described radio-frequency coil supervising device adopts, those skilled in the art know, and described radio-frequency coil supervising device can be connected with described radio-frequency coil proving installation by coil interface.
Described radio-frequency coil proving installation comprises power module, gating module, state handover module, control module, vector network analyzer etc.Described power module is for providing different operating voltage to other module of coil measurement device, described gating module is carried out gating for the passage of realizing the radio-frequency coil to needs test, described state handover module switches for the channel status that realizes the radio-frequency coil to needs test, described control module is used for by work and display parameter value and the status indicator lamp of gating module described in programmed control and described state handover module, described vector network analyzer is connected with described gating module, be used for coordinating described gating module and described state handover module, realize the transmission characteristic parameter test under different conditions to the radio-frequency coil passage of needs test.Described radio-frequency coil 20 to be tested is carried out to functional test and comprise that described radio-frequency coil 20 to be tested is carried out to tuning state and off resonance state to be switched, state when described tuning state is radio-frequency coil cell operation, described off resonance state is the state of radio-frequency coil unit while not working.
In the time using described radio-frequency coil proving installation to carry out described functional test to described radio-frequency coil 20 to be tested, described current monitoring alarm unit 24 and described voltage monitoring alarm unit will be monitored the operating voltage that flows through the working current of described radio-frequency coil 20 to be tested and described radio-frequency coil 20 to be tested is carried out to each module of functional test.If described working current exceedes the operating voltage of described threshold current and/or arbitrary described module lower than first threshold voltage corresponding to this module or higher than Second Threshold voltage corresponding to this module, give the alarm and deenergization.Particularly, described alarm can be the warning of form of sound, also can image or the warning of written form, and can also be to show warning by simple LED lamp, the mode of described deenergization can be manual disconnection, can be also automatic disconnection.
The embodiment of the present invention also provides a kind of radio-frequency coil proving installation, and described radio-frequency coil proving installation comprises the supervising device of radio-frequency coil as shown in Figure 2.
When radio-frequency coil is applied to when human body is tested in magnetic resonance system, need to monitor the each module for imaging in the working current of radio-frequency coil and magnetic resonance system equally.Therefore, method for supervising based on above-mentioned radio-frequency coil and device, the embodiment of the present invention also provides a kind of magnetic resonance system, described magnetic resonance system comprises radio-frequency coil, also comprise: recognition unit, the type that is used for the described radio-frequency coil of identifying access, described type is corresponding with the coding resistance of radio-frequency coil; Threshold current setting unit, for determining the threshold current of described radio-frequency coil according to the type of the described radio-frequency coil of described recognition unit identification; Current monitoring alarm unit, in the time using described radio-frequency coil to test human body, monitors the working current of described radio-frequency coil, when described working current exceedes described threshold current, gives the alarm and deenergization.
Described magnetic resonance system also comprises threshold voltage setting unit, for determining in the time using described radio-frequency coil to test human body for threshold voltage corresponding to each module of imaging.Concrete, described threshold voltage setting unit comprises: the first setting unit, and the operating voltage when described each module is normally worked deducts respectively voltage margin, to obtain corresponding respectively to the first threshold voltage of each module; The second setting unit, the operating voltage when described each module is normally worked adds respectively voltage margin, to obtain corresponding respectively to the Second Threshold voltage of each module.The span of described voltage margin is 0.5V to 1V.
Further, described magnetic resonance system also comprises voltage monitoring alarm unit, for in the time using described radio-frequency coil to test human body, monitor the operating voltage of described each module, when the operating voltage of arbitrary described module is lower than first threshold voltage corresponding to this module or higher than Second Threshold voltage corresponding to this module, give the alarm and deenergization.
Further, described recognition unit comprises: voltage measurement unit, for measuring the voltage of described radio-frequency coil; Coding resistance determining unit, for determining the coding resistance of described radio-frequency coil according to the voltage of the described radio-frequency coil of described voltage measurement unit measurement; Matching unit, mates for the coding resistance of described radio-frequency coil and the coding resistance of every kind of radio-frequency coil that described coding resistance determining unit is determined, to determine the identification code of described radio-frequency coil.Concrete, described identification code is predefined according to the coding resistance of every kind of radio-frequency coil.
Further, described threshold current setting unit comprises: unit number determining unit, for determine the number of unit of described radio-frequency coil according to the type of the described radio-frequency coil of described recognition unit identification; Coil current determining unit, number of unit for the working current under normal condition and the determined described radio-frequency coil of described unit number determining unit by each described radio-frequency coil unit multiplies each other, to obtain the working current of described radio-frequency coil under normal condition; Superpositing unit, for the working current of described radio-frequency coil under normal condition and the electric current allowance addition of described radio-frequency coil that described coil current determining unit is determined, to obtain described threshold current.Concrete, the value of described electric current allowance is not more than 20mA.
It should be noted that, described recognition unit, described threshold current setting unit and the specific implementation of described current monitoring alarm unit are identical with the supervising device implementation of front described radio-frequency coil, do not repeat them here.
In sum; the method for supervising of the radio-frequency coil that technical solution of the present invention provides and device; can identify the radio-frequency coil type to be tested of access; according to dissimilar radio-frequency coil, different threshold currents being set monitors radio-frequency coil; the less radio-frequency coil of number of unit of having avoided dissimilar radio-frequency coil to use same threshold current to cause occurred overcurrent and/or short circuit situation and can not found problem, thereby protected to greatest extent radio-frequency coil and radio-frequency coil proving installation.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can utilize method and the technology contents of above-mentioned announcement to make possible variation and amendment to technical solution of the present invention; therefore; every content that does not depart from technical solution of the present invention; any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, all belong to the protection domain of technical solution of the present invention.
Claims (31)
1. a method for supervising for radio-frequency coil, is characterized in that, comprising:
Access radio-frequency coil to be tested;
Identify the type of described radio-frequency coil to be tested, described type is corresponding with the coding resistance of radio-frequency coil;
Determine the threshold current of described radio-frequency coil to be tested according to the type of described radio-frequency coil to be tested;
In the time that described radio-frequency coil to be tested is carried out to functional test, monitor the working current of described radio-frequency coil to be tested under test mode, when described working current exceedes described threshold current, give the alarm and deenergization.
2. the method for supervising of radio-frequency coil according to claim 1, is characterized in that, also comprises: determine threshold voltage corresponding to each module that described radio-frequency coil to be tested is carried out to functional test.
3. the method for supervising of radio-frequency coil according to claim 2, is characterized in that, describedly determines that threshold voltage corresponding to each module that described radio-frequency coil to be tested is carried out to functional test comprises:
Operating voltage when described each module is normally worked deducts respectively voltage margin, to obtain corresponding respectively to the first threshold voltage of each module;
Operating voltage when described each module is normally worked adds respectively voltage margin, to obtain corresponding respectively to the Second Threshold voltage of each module.
4. the method for supervising of radio-frequency coil according to claim 3, is characterized in that, the span of described voltage margin is 0.5V to 1V.
5. the method for supervising of radio-frequency coil according to claim 3, it is characterized in that, also comprise: in the time that described radio-frequency coil to be tested is carried out to described functional test, monitor the operating voltage of described each module, when the operating voltage of arbitrary described module is lower than first threshold voltage corresponding to this module or higher than Second Threshold voltage corresponding to this module, give the alarm and deenergization.
6. the method for supervising of radio-frequency coil according to claim 1, is characterized in that, described radio-frequency coil to be tested comprises at least one unit.
7. the method for supervising of radio-frequency coil according to claim 1, is characterized in that, the type of the described radio-frequency coil to be tested of described identification comprises:
Measure the voltage of described radio-frequency coil to be tested;
Determine the coding resistance of described radio-frequency coil to be tested according to the voltage of described radio-frequency coil to be tested;
The coding resistance of described radio-frequency coil to be tested is mated with the coding resistance of every kind of radio-frequency coil, to determine the identification code of described radio-frequency coil to be tested.
8. the method for supervising of radio-frequency coil according to claim 7, is characterized in that, described identification code is predefined according to the coding resistance of every kind of radio-frequency coil.
9. the method for supervising of radio-frequency coil according to claim 1, is characterized in that, the described type according to described radio-frequency coil to be tested is determined the threshold current of described radio-frequency coil to be tested, comprising:
Determine the number of unit of described radio-frequency coil to be tested according to the type of described radio-frequency coil to be tested;
Working current by the each unit of described radio-frequency coil to be tested under normal condition and the number of unit of described radio-frequency coil to be tested multiply each other, to obtain the working current of described radio-frequency coil to be tested under normal condition;
Working current by described radio-frequency coil to be tested under normal condition and the electric current allowance of described radio-frequency coil to be tested are added, to obtain described threshold current.
10. the method for supervising of radio-frequency coil according to claim 9, is characterized in that, the value of described electric current allowance is not more than 20mA.
The supervising device of 11. 1 kinds of radio-frequency coils, is characterized in that, comprising:
Linkage unit, for accessing radio-frequency coil to be tested;
Recognition unit, for identifying the type of radio-frequency coil to be tested of described linkage unit access, described type is corresponding with the coding resistance of radio-frequency coil;
Threshold current setting unit, for determining the threshold current of described radio-frequency coil to be tested according to the type of the radio-frequency coil described to be tested of described recognition unit identification;
Current monitoring alarm unit, in the time that described radio-frequency coil to be tested is carried out to functional test, monitors the working current of described radio-frequency coil to be tested under test mode, when described working current exceedes described threshold current, gives the alarm and deenergization.
The supervising device of 12. radio-frequency coils according to claim 11, is characterized in that, also comprises: threshold voltage setting unit, and for determining threshold voltage corresponding to each module that described radio-frequency coil to be tested is carried out to functional test.
The supervising device of 13. radio-frequency coils according to claim 12, is characterized in that, described threshold voltage setting unit comprises:
The first setting unit, the operating voltage when described each module is normally worked deducts respectively voltage margin, to obtain corresponding respectively to the first threshold voltage of each module;
The second setting unit, the operating voltage when described each module is normally worked adds respectively voltage margin, to obtain corresponding respectively to the Second Threshold voltage of each module.
The supervising device of 14. radio-frequency coils according to claim 13, is characterized in that, the span of described voltage margin is 0.5V to 1V.
The supervising device of 15. radio-frequency coils according to claim 13, it is characterized in that, also comprise: voltage monitoring alarm unit, for in the time that described radio-frequency coil to be tested is carried out to described functional test, monitor the operating voltage of described each module, when the operating voltage of arbitrary described module is lower than first threshold voltage corresponding to this module or higher than Second Threshold voltage corresponding to this module, give the alarm and deenergization.
The supervising device of 16. radio-frequency coils according to claim 11, is characterized in that, described radio-frequency coil to be tested comprises at least one unit.
The supervising device of 17. radio-frequency coils according to claim 11, is characterized in that, described recognition unit comprises:
Voltage measurement unit, for measuring the voltage of described radio-frequency coil to be tested;
Coding resistance determining unit, for determining the coding resistance of described radio-frequency coil to be tested according to the voltage of the radio-frequency coil described to be tested of described voltage measurement unit measurement;
Matching unit, mates for the coding resistance of radio-frequency coil described to be tested and the coding resistance of every kind of radio-frequency coil that described coding resistance determining unit is determined, to determine the identification code of described radio-frequency coil to be tested.
The supervising device of 18. radio-frequency coils according to claim 17, is characterized in that, described identification code is predefined according to the coding resistance of every kind of radio-frequency coil.
The supervising device of 19. radio-frequency coils according to claim 11, is characterized in that, described threshold current setting unit comprises:
Unit number determining unit, for determining the number of unit of described radio-frequency coil to be tested according to the type of the radio-frequency coil described to be tested of described recognition unit identification;
Coil current determining unit, number of unit for working current under normal condition and the determined described radio-frequency coil to be tested of described unit number determining unit by the each unit of described radio-frequency coil to be tested multiplies each other, to obtain the working current of described radio-frequency coil to be tested under normal condition;
Superpositing unit, for radio-frequency coil described to be tested working current under normal condition and the electric current allowance addition of described radio-frequency coil to be tested that described coil current determining unit is determined, to obtain described threshold current.
The supervising device of 20. radio-frequency coils according to claim 19, is characterized in that, the value of described electric current allowance is not more than 20mA.
21. 1 kinds of radio-frequency coil proving installations, is characterized in that, comprise the supervising device of the radio-frequency coil described in claim 11 to 20 any one.
22. 1 kinds of magnetic resonance systems, comprise radio-frequency coil, it is characterized in that, also comprise:
Recognition unit, for identifying the type of described radio-frequency coil of access, described type is corresponding with the coding resistance of radio-frequency coil;
Threshold current setting unit, for determining the threshold current of described radio-frequency coil according to the type of the described radio-frequency coil of described recognition unit identification;
Current monitoring alarm unit, in the time using described radio-frequency coil to test human body, monitors the working current of described radio-frequency coil, when described working current exceedes described threshold current, gives the alarm and deenergization.
23. magnetic resonance systems according to claim 22, is characterized in that, also comprise: threshold voltage setting unit, and for determining in the time using described radio-frequency coil to test human body for threshold voltage corresponding to each module of imaging.
24. magnetic resonance systems according to claim 23, is characterized in that, described threshold voltage setting unit comprises:
The first setting unit, the operating voltage when described each module is normally worked deducts respectively voltage margin, to obtain corresponding respectively to the first threshold voltage of each module;
The second setting unit, the operating voltage when described each module is normally worked adds respectively voltage margin, to obtain corresponding respectively to the Second Threshold voltage of each module.
25. magnetic resonance systems according to claim 24, is characterized in that, the span of described voltage margin is 0.5V to 1V.
26. magnetic resonance systems according to claim 24, it is characterized in that, also comprise: voltage monitoring alarm unit, for in the time using described radio-frequency coil to test human body, monitor the operating voltage of described each module, when the operating voltage of arbitrary described module is lower than first threshold voltage corresponding to this module or higher than Second Threshold voltage corresponding to this module, give the alarm and deenergization.
27. magnetic resonance systems according to claim 22, is characterized in that, described radio-frequency coil comprises at least one unit.
28. magnetic resonance systems according to claim 22, is characterized in that, described recognition unit comprises:
Voltage measurement unit, for measuring the voltage of described radio-frequency coil;
Coding resistance determining unit, for determining the coding resistance of described radio-frequency coil according to the voltage of the described radio-frequency coil of described voltage measurement unit measurement;
Matching unit, mates for the coding resistance of described radio-frequency coil and the coding resistance of every kind of radio-frequency coil that described coding resistance determining unit is determined, to determine the identification code of described radio-frequency coil.
29. magnetic resonance systems according to claim 28, is characterized in that, described identification code is predefined according to the coding resistance of every kind of radio-frequency coil.
30. magnetic resonance systems according to claim 22, is characterized in that, described threshold current setting unit comprises:
Unit number determining unit, for determining the number of unit of described radio-frequency coil according to the type of the described radio-frequency coil of described recognition unit identification;
Coil current determining unit, number of unit for the working current under normal condition and the determined described radio-frequency coil of described unit number determining unit by each described radio-frequency coil unit multiplies each other, to obtain the working current of described radio-frequency coil under normal condition;
Superpositing unit, for the working current of described radio-frequency coil under normal condition and the electric current allowance addition of described radio-frequency coil that described coil current determining unit is determined, to obtain described threshold current.
31. magnetic resonance systems according to claim 30, is characterized in that, the value of described electric current allowance is not more than 20mA.
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