CN113933770B - Component layout method and system based on radio frequency emission surface coil and coil - Google Patents
Component layout method and system based on radio frequency emission surface coil and coil Download PDFInfo
- Publication number
- CN113933770B CN113933770B CN202111415664.0A CN202111415664A CN113933770B CN 113933770 B CN113933770 B CN 113933770B CN 202111415664 A CN202111415664 A CN 202111415664A CN 113933770 B CN113933770 B CN 113933770B
- Authority
- CN
- China
- Prior art keywords
- information
- capacitor
- imaging object
- magnetic field
- capacitance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
-
- 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
Abstract
The application relates to a component layout method, a system and a coil based on a radio frequency emission surface coil, which relate to the field of magnetic resonance and comprise the following steps: acquiring the internal field position information of a current imaging object; matching and searching are carried out according to the imaging object internal field position information and the capacitor information stored in the preset component parameter information database so as to determine the corresponding capacitor information in the imaging object internal field position information; and assembling the radio frequency transmitting surface coil according to the preset annular circuit board information and the capacitor information. The method and the device have the effects of reducing the deviation of the central position of the maximum value of the radio frequency transmission field, improving the uniformity of the field and improving the imaging quality after imaging.
Description
Technical Field
The present application relates to the field of magnetic resonance, and in particular, to a component layout method, system and coil based on a radio frequency transmission surface coil.
Background
A radio frequency coil is the hardware in a magnetic resonance imaging device used to transmit radio frequency pulses and/or receive magnetic resonance signals.
In the related art, a loop coil includes a coil loop including a capacitor and an inductor. The loop coil is used in a magnetic resonance environment, and radio frequency energy is driven into a human body, so that a radio frequency transmitting field is formed.
In view of the above-mentioned related art, the inventor believes that once imaged, the center position of the maximum value of the radio frequency transmission field is shifted, which reduces the uniformity of the field, thereby leading to the reduction of the imaging quality after imaging, and has room for improvement.
Disclosure of Invention
In order to reduce the deviation of the central position of the maximum value of a radio frequency transmitting field, improve the uniformity of the field and improve the imaging quality after imaging, the application provides a component layout method, a system and a coil based on a radio frequency transmitting surface coil.
In a first aspect, the present application provides a component layout method based on a radio frequency transmission surface coil, which adopts the following technical scheme:
a component layout method based on a radio frequency emission surface coil comprises the following steps:
acquiring the internal field position information of a current imaging object;
matching and searching are carried out according to the imaging object internal field position information and the capacitor information stored in the preset component parameter information database so as to determine the corresponding capacitor information in the imaging object internal field position information;
And assembling the radio frequency transmitting surface coil according to the preset annular circuit board information and the capacitor information.
Through adopting above-mentioned technical scheme, through the acquisition to the interior field positional information of formation of image object, thereby know the position of formation of image object, and through capacitor information and the interior field positional information of formation of image object that save in the components and parts parameter information database, thereby required capacitor information is looked for in the matching, and assemble with the surface coil of pair radio frequency emission according to capacitor information and annular circuit board information, and correct through the surface coil of radio frequency emission, thereby reduce the skew of the central point of radio frequency emission field maximum value, improve the homogeneity of field, improve the imaging quality after the formation of image.
Optionally, the method for acquiring location information of an internal field of an imaging object includes:
acquiring a radio frequency transmitting field distribution diagram generated by a current coil in an imaging object;
performing matching analysis according to the radio frequency transmitting field distribution pattern and the magnetic field intensity information stored in the preset magnetic field database to determine the magnetic field intensity information in the radio frequency transmitting field distribution pattern;
matching and comparing the color distribution information stored in the preset color database with the magnetic field intensity information to generate magnetic field color image information;
And defining the position of the maximum value of the magnetic field in the magnetic field color image information as the position information of the field in the imaging object.
By adopting the technical scheme, the radio frequency emission field distribution graph is known, so that the magnetic field intensity in the radio frequency emission field distribution graph is known to be matched with different colors, color images with different colors are generated, and the position with the strongest magnetic field is positioned as the field position information in the imaging object, so that the coils are conveniently arranged by a worker.
Optionally, the capacitor information includes a large capacitor bank and a small capacitor bank tuned and matched to the working frequency, the capacitance value of the large capacitor bank is greater than that of the small capacitor bank, and the capacitance values of the capacitors in each group are the same;
the layout distribution method of the large capacitor bank and the small capacitor bank comprises the following steps:
according to the position corresponding to the imaging object internal field position information corresponding to the annular circuit board information, determining the closest point of the annular circuit board position information corresponding to the imaging object internal field position information
The large capacitor bank is placed far from the nearest point and the small capacitor bank is placed close to the nearest point.
Through adopting above-mentioned technical scheme, the setting of big electric capacity group and little electric capacity group, thereby divide into two sets ofly with the electric capacity on the coil, and two sets of electric capacities all work in the tuning matches the working range under the operating frequency, place big electric capacity group in and keep away from the nearest point department, place little electric capacity group in and be close to the nearest point department, thereby make the image of formation of image shift to the intermediate position, reduce the skew of the central point position of radio frequency transmission field maximum value, improve the homogeneity of field, improve the imaging quality after the formation of image.
Optionally, the method for selecting parameter information and quantity information of capacitors in the large capacitance group and the small capacitance group includes:
acquiring magnetic field intensity detection information in a current radio frequency emission field distribution diagram;
analyzing and matching the same large capacitance parameter information, the large capacitance quantity information and the magnetic field strength detection information stored in a preset large capacitance database to determine the magnetic field strength detection information and the same large capacitance parameter information and large capacitance quantity information under the field position information in the imaging object;
analyzing and matching according to the same small capacitance parameter information, small capacitance quantity information, magnetic field strength detection information and imaging object internal field position information stored in a preset small capacitance database to determine the same small capacitance parameter information and small capacitance quantity information under the magnetic field strength detection information and the imaging object internal field position information;
and selecting a large capacitor group according to the large capacitor parameter information and the large capacitor quantity information, and selecting a small capacitor group according to the small capacitor parameter information and the small capacitor quantity information.
By adopting the technical scheme, the required large capacitance parameter information and the required large capacitance quantity information are matched from the large capacitance database and the required small capacitance parameter information and the required small capacitance quantity information are matched from the small capacitance database through knowing the magnetic field intensity detection information. The number and parameters of the large and small capacitors required are thus selected to assemble the coil.
Optionally, the method for selecting the interval angle between the large capacitor bank and the small capacitor bank includes:
acquiring magnetic field intensity detection information in a current radio frequency emission field distribution diagram;
analyzing and matching according to capacitor bank interval angle information, magnetic field strength detection information and imaging object internal field position information stored in a preset capacitor bank interval angle database to determine capacitor bank interval angle information under the magnetic field strength detection information and the imaging object internal field position information;
and controlling the interval angle between the large capacitor bank and the small capacitor bank according to the interval angle information of the capacitor banks.
Through adopting above-mentioned technical scheme, in big electric capacity group and the little electric capacity group, select group and the interval position between the group to the matching goes out more suitable coil, consequently through matching magnetic field intensity detection information, thereby analyzes out the electric capacity group interval angle information that corresponds, thereby carries out the overall arrangement to the interval angle of big electric capacity group and little electric capacity group, improves the homogeneity in field.
Optionally, the method for selecting the spacing angle of the capacitors between each capacitor group includes:
acquiring magnetic field intensity detection information in a current radio frequency emission field distribution diagram;
Analyzing and matching according to the capacitance interval angle information, the magnetic field strength detection information and the imaging object internal field position information stored in the preset capacitance interval angle database to determine the capacitance interval angle information under the magnetic field strength detection information and the imaging object internal field position information;
the spacing angle between the capacitors of each group is individually controlled according to the capacitance spacing angle information.
Through adopting above-mentioned technical scheme, in big electric capacity group or little electric capacity group, all have a plurality of condensers in every group, consequently through the understanding to magnetic field intensity detection information to the interval to the condenser in every group, thereby accomplish the overall arrangement and the installation to the condenser, improve the homogeneity in field.
Optionally, the method for selecting the ratio of the capacitance values between the capacitors corresponding to the large capacitance group and the small capacitance group includes:
acquiring magnetic field intensity detection information in a current radio frequency emission field distribution diagram;
analyzing and matching according to the ratio information, the magnetic field strength detection information and the imaging object internal field position information stored in the preset ratio database to determine the ratio information under the magnetic field strength detection information and the imaging object internal field position information;
And selecting the ratio between the capacitors corresponding to the large capacitance group and the small capacitance group according to the ratio information.
By adopting the technical scheme, in order to enable the large capacitance group and the small capacitance group to work in the working range matched with the working frequency in a tuning mode, the capacitance values of the capacitors in the large capacitance group and the capacitors in the small capacitance group are adjusted. The capacitance value is selected, the ratio information is determined through the ratio information, the magnetic field intensity detection information and the field position information in the imaging object in the ratio database, and the capacitors in the large capacitor bank and the capacitors in the small capacitor bank are set according to the ratio information, so that the uniformity of the field is improved.
Optionally, the method for improving the uniformity corresponding to the field position information in the imaged object includes:
calculating a distance difference value between a central point corresponding to the field position information in the imaging object and a preset central point position;
judging whether the distance difference value is smaller than a preset reference difference value or not;
if the distance difference is smaller than the reference difference, prompting;
if the distance difference is larger than or equal to the reference difference, comparing the inductor information and the capacitor information stored in the preset inductor database to find out the inductor information corresponding to the capacitor information, and connecting an inductor to the capacitor in parallel according to the inductor information.
By adopting the technical scheme, when the image is promoted by adopting the capacitor, once the size of the coil is limited and the capacitance value and the spatial position of the capacitor are limited, the uniformity of the field can be improved in a mode of connecting the inductors in parallel. Therefore, the distance difference between the central point position and the central point is calculated, so that the corresponding inductor information is searched out to connect the capacitors in parallel, the deviation of the central position of the maximum value of the radio frequency transmitting field is further reduced, the field uniformity is improved, and the imaging quality after imaging is improved.
In a second aspect, the present application provides a component layout system based on a radio frequency transmission surface coil, which adopts the following technical scheme:
a component layout system based on radio frequency transmission surface coils comprises:
the acquisition module is used for acquiring the position information of the inner field of the current imaging object;
the searching module is used for performing matching searching according to the imaging object internal field position information and the capacitor information stored in the preset component parameter information database so as to determine the corresponding capacitor information in the imaging object internal field position information;
the assembling module is used for assembling the radio frequency transmitting surface coil according to the preset annular circuit board information and the capacitor information;
And the processing module is connected with the acquisition module, the searching module and the assembling module and is used for storing and processing the information.
Through adopting above-mentioned technical scheme, through acquireing the acquisition of module to formation of image object internal field positional information, thereby know the position of formation of image object, and look for capacitor information and formation of image object internal field positional information that store in the component parameter information database through looking for the module, thereby required capacitor information is looked for in the matching, and assemble in order to the radio frequency emission surface coil according to capacitor information and annular circuit board information, and correct through radio frequency emission surface coil, thereby reduce the skew of the central point of radio frequency emission field maximum value, improve the homogeneity of field, improve the imaging quality after the formation of image.
In a third aspect, the present application provides a coil, which adopts the following technical solution:
a coil comprises an annular circuit board electrically connected with alternating current, wherein a large capacitor bank and a small capacitor bank are arranged on the annular circuit board;
and the annular circuit board is also provided with a matching capacitor electrically connected with alternating current so as to ensure that the coil works at the magnetic resonance working frequency.
By adopting the technical scheme, the capacitor on the corresponding annular circuit board is mounted, so that the deviation of the central position of the maximum value of the radio frequency transmitting field is reduced, the uniformity of the field is improved, and the imaging quality after imaging is improved. And the whole body is operated by matching the capacitors to ensure that the coil operates at the magnetic resonance operating frequency.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the deviation of the central position of the maximum value of the radio frequency emission field is reduced, the uniformity of the field is improved, and the imaging quality after imaging is improved;
2. the spacing position between the large capacitor bank and the small capacitor bank is set through the strength of the magnetic field, so that the uniformity of the field is improved;
3. the spacing positions of the same capacitors in each group are set by the strength of the magnetic field, so that the uniformity of the field is improved.
Drawings
Fig. 1 is a schematic circuit diagram of a coil.
Fig. 2 is a flow chart of a method for arranging components of the radio frequency transmission surface coil.
Fig. 3 is a flowchart of a method for acquiring location information of a field within an imaged object.
Fig. 4 is a flow chart of a layout allocation method for large capacitor banks and small capacitor banks.
Fig. 5 is a flowchart of a method for selecting parameter information and quantity information of capacitors in a large capacitance group and a small capacitance group.
Fig. 6 is a flow chart of a method for selecting the spacing angle between a large capacitor bank and a small capacitor bank.
Fig. 7 is a flow chart of a method for selecting the spacing angle of capacitors between each capacitor bank.
Fig. 8 is a flowchart of a method for selecting a ratio of capacitance values between capacitors corresponding to a large capacitor bank and a small capacitor bank.
Fig. 9 is a flowchart of a method for improving uniformity corresponding to field position information in an imaged object.
Fig. 10 is a diagram showing the effect of magnetic field shift.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to fig. 1-10 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1, an embodiment of the present application discloses a coil including an annular circuit board electrically connected to an alternating current, and a large capacitor bank and a small capacitor bank disposed on the annular circuit board.
Referring to fig. 1, the annular circuit board is a PCB board, and the large capacitor bank and the small capacitor bank are selected and soldered to the PCB board. The capacitor C100 is used to represent a large capacitance group, in which at least one capacitor is included, and the capacitance values of the capacitors are the same. The capacitor C200 is used to represent a small capacitance group, in which at least one capacitor is included, and the capacitance values of the capacitors are the same.
In addition, the capacitance values in the large capacitor bank may be different, and the capacitance values in the small capacitor bank may be different. The capacitance value of each capacitor in the large capacitor bank is larger than that of any capacitor in the small capacitor bank. For convenience of adjustment, the same description is given in this embodiment as an example to facilitate adjustment of the capacitance value.
Referring to fig. 1, a matching capacitor connected to an alternating current is further provided on the ring circuit board, the matching capacitors are a capacitor C31 and a capacitor C32, and one end of an alternating current power source E is connected to one end of the capacitor C31, and the other end of the alternating current power source E is connected to one end of the capacitor C32. The other end of the capacitor C31 is connected to the coil and the other end of the capacitor C32 is connected to the coil, so that the capacitor C31 and the capacitor C32 are connected in parallel to the coil, thereby supplying power to the large and small capacitor banks.
Meanwhile, after the large capacitor group and the small capacitor group are used in a combined mode, the coil works under the magnetic resonance working frequency. In order to more conveniently enable the coil to work at the magnetic resonance working frequency, an intermediate capacitor bank can be added between the large capacitor bank and the small capacitor bank, the intermediate capacitor bank is positioned between the large capacitor bank and the small capacitor bank, and the intermediate capacitor bank at least comprises one capacitor. And the capacitance value of the large capacitor bank is larger than that of the middle capacitor bank and larger than that of the small capacitor bank.
Any one capacitance value in the middle capacitor group is smaller than any one capacitance value of the capacitance values of the large capacitor group, and any one capacitance value in the middle capacitor group is larger than any one capacitance value of the capacitance values of the small capacitor group. For convenience of adjustment, the same description is given in this embodiment as an example to facilitate adjustment of the capacitance value.
To further improve the uniformity, a corresponding inductor may be connected in parallel to the capacitor of the coil. A non-uniform coil current distribution is achieved to produce a more uniform magnetic field.
Referring to fig. 2, based on the same inventive concept, an embodiment of the present invention provides a component layout method based on a radio frequency transmission surface coil, where a large capacitor bank and a small capacitor bank used in the coil are arranged, and the layout method includes the following steps:
step 100: and acquiring the internal field position information of the current imaging object.
The position information of the imaging object internal field is the position of the imaging object internal field displayed on the detection device, and the originally carried coils are different due to different detection devices, so that the original imaging of the coils needs to be acquired first, and the offset condition on the imaging object is known.
After the instrument images, the imaging result is obtained through the field detector, and therefore the field position information in the imaging object is obtained.
Step 101: and matching and searching according to the imaging object internal field position information and the capacitor information stored in the preset component parameter information database to determine the corresponding capacitor information in the imaging object internal field position information.
The component parameter information database is a preset database, and different component parameters are input by workers for later calling. The capacitor information includes the number, capacity, connection mode, etc. of the capacitors, and is set by those skilled in the art according to the time situation, which is not described herein again.
The component parameter information database stores imaging object internal field position information and capacitor information, different imaging object internal field position information correspond to different capacitor information, and therefore the imaging object internal field position information is input into the component parameter information database, and corresponding capacitor information is matched and searched out from the component parameter information database for use.
Step 102: and assembling the radio frequency transmitting surface coil according to the preset annular circuit board information and the capacitor information.
The annular circuit board information is a PCB circuit board, and preferably adopts a circular ring shape, and can also be a closed figure such as a rectangle, a triangle and the like. The information of the annular circuit board is preset information, the information of the annular circuit board comprises parameter information such as the size, the inner diameter, the outer diameter and the thickness of the PCB, and the information is set by a worker according to actual conditions and is not described repeatedly herein. According to different used devices, the size of the annular circuit board corresponds to the size of the device, so that the annular circuit board information can be known under the condition that the used devices are known.
And welding and assembling the capacitor corresponding to the capacitor information on the PCB corresponding to the annular circuit board information so as to assemble the radio frequency transmitting surface coil for use.
Referring to fig. 3, the method for acquiring the location information of the internal field of the imaging object includes the following steps:
step 200: a radio frequency transmit field profile of a current coil generated in an imaged object is acquired.
When the device is used for imaging, the device is provided with a coil, imaging is carried out in an imaging object, so that a radio frequency transmitting field distribution diagram is generated, and the radio frequency transmitting field distribution diagram is acquired through a field detector.
Step 201: and performing matching analysis according to the radio-frequency transmitting field distribution pattern and the magnetic field intensity information stored in the preset magnetic field database to determine the magnetic field intensity information in the radio-frequency transmitting field distribution pattern.
The magnetic field strength information is the strength value of the magnetic field. The magnetic field database is a preset database, is set by a worker according to actual conditions, and is not described herein, and the magnetic field database stores magnetic field intensity information and learns the magnetic field intensity information in the radio frequency transmission field distribution diagram.
The intensity of the magnetic field is different, the data such as parameters, images and the like displayed in the radio frequency transmitting field distribution diagram are different, and the intensity of the magnetic field in the radio frequency transmitting field distribution diagram is distinguished through different parameters and images.
Step 202: and matching and comparing the color distribution information stored in the preset color database with the magnetic field intensity information to generate magnetic field color image information.
The color database is a preset database, color distribution information and magnetic field intensity information are stored in the color database, different magnetic field intensities have different colors to represent, and the color distribution information is corresponding colors under different magnetic fields.
After the magnetic field intensity information is input, matching color distribution information from a color database, and covering the color distribution information on the original radio frequency emission field distribution map so as to generate magnetic field color image information. The magnetic field color image information is a color image or a gray image under different magnetic fields.
Step 203: the position of the magnetic field maximum in the magnetic field color image information is defined as the field position information within the imaged object.
And defining the position of the maximum magnetic field value corresponding to the magnetic field color image information as the position information of the internal field of the imaging object, namely, taking the point with the maximum magnetic field as the position information of the internal field of the imaging object, thereby representing the display position of the imaging object and facilitating the later offset correction.
Referring to fig. 4, the capacitor information includes a large capacitance group and a small capacitance group tuned to the operating frequency, and the capacitance value of the large capacitance group is greater than that of the small capacitance group, and the capacitance values in each group of capacitors are the same. The layout distribution method of the large capacitor bank and the small capacitor bank comprises the following steps:
Step 300: and determining the closest point on the position corresponding to the imaging object internal field position information corresponding to the annular circuit board information according to the position corresponding to the imaging object internal field position information corresponding to the annular circuit board information.
The position of the imaging object corresponding to the annular circuit board information is a constant position, and the imaging is in an initial imaging state before the capacitor is not installed, so that the position corresponding to the field position information in the imaging object corresponding to the annular circuit board information is known.
And determining the closest point on the position corresponding to the field position information in the imaging object corresponding to the annular circuit board information. Namely, the imaging position is far away from the nearest point corresponding to the annular circuit board information. The closest point is used mainly to determine the orientation of the small capacitor when the capacitor is mounted at the time of confirmation.
Step 301: the large capacitor bank is placed far from the nearest point and the small capacitor bank is placed close to the nearest point.
And mounting and placing the small capacitor bank at the nearest point according to the determined nearest point. While placing the large capacitor bank far from the nearest point. And requires the use of a small capacitor bank and a large capacitor bank in cooperation with each other to achieve a tuned match to operation at the operating frequency.
When the tuning matching to the working frequency cannot be achieved, an intermediate capacitor bank can be arranged between the small capacitor bank and the large capacitor bank, so that the whole coil can achieve the range of the tuning matching to the working frequency, and the intermediate capacitor bank is arranged between the large capacitor bank and the small capacitor bank.
Referring to fig. 5, after knowing the conditions of the large capacitance group and the small capacitance group, the method for selecting the parameter information and the quantity information of the capacitors in the large capacitance group and the small capacitance group comprises the following steps:
step 400: and acquiring magnetic field intensity detection information in the current radio frequency emission field distribution diagram.
The magnetic field intensity detection information is detected through the sensor, so that the magnetic field intensity corresponding to the radio frequency emission field distribution diagram is known, the magnetic field intensity detection information is output, and the magnetic field intensity detection information is displayed on the radio frequency emission field distribution diagram so as to be convenient for checking and using of working personnel.
Step 401: and analyzing and matching according to the same large capacitance parameter information, large capacitance quantity information and magnetic field strength detection information stored in a preset large capacitance database to determine the magnetic field strength detection information and the same large capacitance parameter information and large capacitance quantity information under the field position information in the imaging object.
The large capacitance database is a preset database, data are input into the large capacitance database in advance by workers, and the same large capacitance parameter information, large capacitance quantity information and magnetic field intensity detection information are stored in the large capacitance database.
The capacitors selected in the large capacitance group are the same capacitors. The information of the large capacitance parameter is the parameters of the capacitors in the large capacitance group, the information of the large capacitance quantity is the quantity of the capacitors in the large capacitance group, the information of the magnetic field strength detection is the detected magnetic field strength, different parameters of the large capacitors and corresponding parameters of the small capacitors are correspondingly given according to different magnetic field strengths and the information of the field position in the imaging object, and when the large capacitors and the small capacitors can meet the requirements, a middle capacitor group is not selected; when the large and small capacitors cannot meet the demand, the intermediate capacitor bank is selected.
After the magnetic field intensity detection information and the field position information in the imaging object are input into the large capacitance database, the same large capacitance parameter information and large capacitance quantity information are searched out for selection by a worker.
Step 402: and analyzing and matching according to the same small capacitance parameter information, small capacitance quantity information, magnetic field strength detection information and imaging object internal field position information stored in a preset small capacitance database to determine the same small capacitance parameter information and small capacitance quantity information under the magnetic field strength detection information and the imaging object internal field position information.
The large capacitance database is a preset database, data are input into the large capacitance database in advance by workers, and the same large capacitance parameter information, large capacitance quantity information and magnetic field intensity detection information are stored in the large capacitance database.
The capacitors selected in the small capacitor bank are the same capacitors. The small capacitance parameter information is parameters of capacitors in the small capacitance group, the small capacitance quantity information is the quantity of the capacitors in the small capacitance group, the magnetic field strength detection information is detected magnetic field strength, different parameters of the small capacitors and corresponding parameters of the small capacitors are correspondingly given according to different magnetic field strengths and field position information in an imaging object, and when the large capacitors and the small capacitors can meet requirements, a middle capacitor group is not selected; when the large and small capacitors cannot meet the demand, the intermediate capacitor bank is selected.
After the magnetic field intensity detection information and the field position information in the imaging object are input into the small capacitance database, the same small capacitance parameter information and the same small capacitance quantity information are searched out for selection by a worker.
The small capacitance parameter information and the large capacitance parameter information are synchronous data, and after the magnetic field intensity detection information and the field position information in the imaging object are input, the small capacitance parameter information, the small capacitance quantity information, the large capacitance parameter information and the small capacitance quantity information are output simultaneously. And when the range of tuning matching to the working frequency is not satisfied, the parameters and the number of the middle capacitor bank are additionally output. The parameters and number of the middle capacitor bank are the same as those of the large capacitor bank, and are not described herein.
Step 403: and selecting a large capacitor group according to the large capacitor parameter information and the large capacitor quantity information, and selecting a small capacitor group according to the small capacitor parameter information and the small capacitor quantity information.
And selecting a large capacitor bank according to the found large capacitor parameter information and the large capacitor quantity information, selecting a small capacitor bank according to the found small capacitor parameter information and the small capacitor quantity information, and selecting an intermediate capacitor bank according to the found intermediate capacitor parameter information and the intermediate capacitor quantity information.
Referring to fig. 6, when a large capacitor bank and a small capacitor bank are used, a separation angle between the large capacitor bank and the small capacitor bank is controlled, and a method for selecting the separation angle includes the steps of:
step 500: and acquiring magnetic field intensity detection information in the current radio frequency transmission field distribution diagram.
The magnetic field intensity detection information is detected through the sensor, the magnetic field intensity corresponding to the radio frequency transmission field distribution diagram is detected, and the magnetic field intensity detection information is output, so that the magnetic field intensity corresponding to the radio frequency transmission field distribution diagram is known.
Step 501: and analyzing and matching according to the capacitor bank interval angle information, the magnetic field strength detection information and the imaging object internal field position information stored in the preset capacitor bank interval angle database to determine the magnetic field strength detection information and the capacitor bank interval angle information under the imaging object internal field position information.
The capacitor bank interval angle database is a preset database and is set by a worker according to actual conditions, and capacitor bank interval angle information, magnetic field intensity detection information and imaging object internal field position information are stored in the capacitor bank interval angle database. And the capacitor bank interval angle information is the interval angle between the capacitor banks.
And according to the magnetic field intensity detection information and the field position information in the imaging object, the interval angle information of the capacitor bank is searched from the capacitor bank interval angle database, so that the interval angles among the large capacitor bank, the small capacitor bank and the middle capacitor bank are known according to the interval angle information of the capacitor bank.
Step 502: and controlling the interval angle between the large capacitor bank and the small capacitor bank according to the interval angle information of the capacitor banks.
After knowing the interval angle information of the capacitor banks, the interval angle between the large capacitor bank and the small capacitor bank is controlled, when the middle capacitor bank exists, the interval angle between the middle capacitor bank and the large capacitor bank is also controlled, and the interval angle between the middle capacitor bank and the small capacitor bank is also controlled.
Referring to fig. 7, in each capacitance group, the method for selecting the spacing angle between the capacitors of the same group includes the following steps:
Step 600: and acquiring magnetic field intensity detection information in the current radio frequency emission field distribution diagram.
The magnetic field intensity detection information is detected through the sensor, the magnetic field intensity corresponding to the radio frequency emission field distribution diagram is detected, and the magnetic field intensity detection information is output, so that the magnetic field intensity corresponding to the radio frequency emission field distribution diagram is known.
Step 601: and analyzing and matching according to the capacitance interval angle information, the magnetic field strength detection information and the imaging object internal field position information stored in the preset capacitance interval angle database to determine the magnetic field strength detection information and the capacitance interval angle information under the imaging object internal field position information.
The capacitance interval angle database is a preset database, and capacitance interval angle information, magnetic field intensity detection information and imaging object internal field position information are stored in the capacitance interval angle database. And the capacitance interval angle information is the interval angle between the same capacitors in the same capacitance group.
After the magnetic field intensity detection information and the imaging object internal field position information are known, matching the magnetic field intensity detection information and the capacitance interval angle information corresponding to the imaging object internal field position information from the capacitance interval angle database.
Step 602: the spacing angle between the capacitors of each group is individually controlled according to the capacitance spacing angle information.
And (3) according to the capacitance interval angle information, independently controlling the interval angle between the capacitors of each group, namely, respectively controlling the angles of the capacitors in the large capacitance group, the small capacitance group and the middle capacitance group, so as to independently control the installation angle of the capacitors in each group.
Referring to fig. 8, the ratio between each set of capacitors is a constant ratio to facilitate capacitor operation in a range tuned to match the operating frequency. The method for selecting the ratio of the capacitance values between the capacitors corresponding to the large capacitance group and the small capacitance group comprises the following steps:
step 700: and acquiring magnetic field intensity detection information in the current radio frequency transmission field distribution diagram.
The magnetic field intensity detection information is detected through the sensor, the magnetic field intensity corresponding to the radio frequency transmission field distribution diagram is detected, and the magnetic field intensity detection information is output, so that the magnetic field intensity corresponding to the radio frequency transmission field distribution diagram is known.
Step 701: and analyzing and matching according to the ratio information, the magnetic field strength detection information and the imaging object internal field position information stored in the preset ratio database to determine the magnetic field strength detection information and the ratio information under the imaging object internal field position information.
The ratio database is a preset database, information is set by workers according to actual conditions, and the ratio database stores ratio information, magnetic field intensity detection information and imaging object internal field position information. The ratio information is the ratio of capacitors between different groups.
And finding out corresponding ratio information from the ratio database according to the magnetic field intensity detection information and the field position information in the imaging object. The ratio information is a ratio of a capacitance value in the large capacitance group to a capacitance value in the small capacitance group, and when the intermediate capacitance group exists, the ratio information is a ratio of a capacitance value in the large capacitance group, a capacitance value in the small capacitance group and a ratio in the intermediate capacitance group.
Step 702: and selecting the ratio between the capacitors corresponding to the large capacitance group and the small capacitance group according to the ratio information.
And selecting the ratio between the capacitors corresponding to the large capacitance group and the small capacitance group according to the obtained ratio information. In the case of having an intermediate capacitance group, the ratio between the capacitors corresponding to the large capacitance group, the intermediate capacitance group, and the small capacitance group is selected. Thereby selecting the capacitor.
Referring to fig. 9, the method for improving the uniformity corresponding to the field position information in the imaged object includes:
Step 800: and calculating the distance difference between the central point corresponding to the field position information in the imaging object and the preset central point position.
The midpoint position is a preset position, and the midpoint position is a position set by a worker according to actual conditions, so that the imaging position is ensured.
And calculating the distance difference between the central point and the midpoint position corresponding to the internal field position information of the imaging object, thereby obtaining the deviation.
Step 801: and judging whether the distance difference is smaller than a preset reference difference.
The reference difference is preset data, and the data is set by a worker according to actual conditions. And judging whether the distance difference is smaller than the reference difference or not, so that the numerical value of the deviation is known to facilitate correction.
Step 8020: and if the distance difference is smaller than the reference difference, prompting.
If the distance difference is smaller than the reference difference, the deviation is small, and therefore prompting is carried out, and staff are informed.
Step 8021: if the distance difference is larger than or equal to the reference difference, comparing the inductor information and the capacitor information stored in the preset inductor database to find out the inductor information corresponding to the capacitor information, and connecting an inductor to the capacitor in parallel according to the inductor information.
If the distance difference is larger than or equal to the reference difference, the distance difference is too large, and the deviation amount from the midpoint position can be reduced by connecting inductors in parallel.
The inductor database is a preset database, and is set by a worker according to actual conditions, which is not described herein. And the inductor database stores inductor information and capacitor information. By inputting the capacitor information, inductor information corresponding to the capacitor information is found, and the inductor information is parameters such as the number of inductors and the inductor value.
And connecting the inductor corresponding to the inductor information to the capacitor in parallel, thereby reducing the deviation.
Referring to fig. 10, when the center position of the maximum value of the radio frequency transmission field is shifted, the uniformity of the field is improved by the radio frequency transmission surface coil, and the center position of the maximum value of the radio frequency transmission field is displayed in a corrected manner, so as to improve the imaging quality after imaging.
Based on the same inventive concept, an embodiment of the present invention provides a component layout system based on a radio frequency transmission surface coil, including:
the acquisition module is used for acquiring the position information of the field in the current imaging object;
The searching module is used for performing matching searching according to the imaging object internal field position information and the capacitor information stored in the preset component parameter information database so as to determine the corresponding capacitor information in the imaging object internal field position information;
the assembling module is used for assembling the radio frequency transmitting surface coil according to the preset annular circuit board information and the capacitor information;
the imaging object internal field position acquisition module is used for acquiring internal field position information of an imaging object;
the capacitor layout distribution module is used for acquiring the layout of the capacitors;
the capacitor parameter module is used for acquiring capacitor parameter information;
the capacitor quantity module is used for acquiring the capacitor quantity information;
the first interval angle selection module is used for controlling the interval information between the capacitor groups;
the second interval angle selection module is used for controlling the angles of the capacitors in the same group;
the ratio selection module is used for setting the ratios of the capacitors of different groups;
the boosting module is used for matching different inductors to be connected with the capacitor in parallel;
the processing module is connected with the acquisition module, the search module, the imaging object internal field position acquisition module, the capacitor layout distribution module, the capacitor parameter module, the capacitor quantity module, the first interval angle selection module, the second interval angle selection module, the ratio selection module, the lifting module and the assembly module, and is used for storing and processing information.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Claims (8)
1. A component layout method based on a radio frequency emission surface coil is characterized by comprising the following steps:
acquiring the internal field position information of a current imaging object;
matching and searching are carried out according to the imaging object internal field position information and the capacitor information stored in the preset component parameter information database so as to determine the corresponding capacitor information in the imaging object internal field position information;
Assembling a radio frequency transmitting surface coil according to the preset annular circuit board information and the capacitor information;
the capacitor information comprises a large capacitor group and a small capacitor group which are tuned and matched to the working frequency, the capacitance value of the large capacitor group is larger than that of the small capacitor group, and the capacitance values of the capacitors in each group are the same;
the layout distribution method of the large capacitor bank and the small capacitor bank comprises the following steps:
determining the closest point of the position information of the imaging object internal field on the annular circuit board according to the position corresponding to the imaging object internal field position information corresponding to the annular circuit board information;
placing the large capacitor bank far away from the nearest point and placing the small capacitor bank close to the nearest point;
the method for acquiring the field position information in the imaging object comprises the following steps:
acquiring a radio frequency transmitting field distribution diagram generated by a current coil in an imaging object;
performing matching analysis according to the radio-frequency transmitting field distribution pattern and the magnetic field intensity information stored in the preset magnetic field database to determine the magnetic field intensity information in the radio-frequency transmitting field distribution pattern;
matching and comparing the color distribution information stored in the preset color database with the magnetic field intensity information to generate magnetic field color image information;
And defining the position of the maximum value of the magnetic field in the magnetic field color image information as the position information of the field in the imaging object.
2. The method for component placement based on radio frequency emitting surface coils as claimed in claim 1, wherein: the method for selecting the parameter information and the quantity information of the capacitors in the large capacitance group and the small capacitance group comprises the following steps:
acquiring magnetic field intensity detection information in a current radio frequency emission field distribution diagram;
analyzing and matching according to the same large capacitance parameter information, large capacitance quantity information and magnetic field strength detection information stored in a preset large capacitance database to determine the magnetic field strength detection information and the same large capacitance parameter information and large capacitance quantity information under the field position information in the imaging object;
analyzing and matching according to the same small capacitance parameter information, small capacitance quantity information, magnetic field strength detection information and imaging object internal field position information stored in a preset small capacitance database to determine the same small capacitance parameter information and small capacitance quantity information under the magnetic field strength detection information and the imaging object internal field position information;
and matching the large capacitor group according to the large capacitor parameter information and the large capacitor quantity information, and matching the small capacitor group according to the small capacitor parameter information and the small capacitor quantity information.
3. A component arrangement method based on a radio frequency transmission surface coil as claimed in claim 1, wherein: the method for selecting the interval angle between the large capacitor bank and the small capacitor bank comprises the following steps:
acquiring magnetic field intensity detection information in a current radio frequency emission field distribution diagram;
analyzing and matching according to capacitor bank interval angle information, magnetic field strength detection information and imaging object internal field position information stored in a preset capacitor bank interval angle database to determine magnetic field strength detection information and capacitor bank interval angle information under the imaging object internal field position information;
and controlling the interval angle between the large capacitor bank and the small capacitor bank according to the interval angle information of the capacitor banks.
4. A component arrangement method based on a radio frequency transmission surface coil as claimed in claim 1, wherein: the method for selecting the spacing angle of the capacitors between each capacitor group comprises the following steps:
acquiring magnetic field intensity detection information in a current radio frequency emission field distribution diagram;
analyzing and matching according to the capacitance interval angle information, the magnetic field strength detection information and the imaging object internal field position information stored in the preset capacitance interval angle database to determine the magnetic field strength detection information and the capacitance interval angle information under the imaging object internal field position information;
The spacing angle between the capacitors of each group is individually controlled according to the capacitance spacing angle information.
5. A component arrangement method based on a radio frequency transmission surface coil as claimed in claim 1, wherein: the method for selecting the ratio of the capacitance values between the capacitors corresponding to the large capacitance group and the small capacitance group comprises the following steps:
acquiring magnetic field intensity detection information in a current radio frequency emission field distribution diagram;
analyzing and matching according to ratio information, magnetic field strength detection information and imaging object internal field position information stored in a preset ratio database to determine ratio information under the magnetic field strength detection information and the imaging object internal field position information;
and selecting the ratio between the capacitors corresponding to the large capacitance group and the small capacitance group according to the ratio information.
6. A component arrangement method based on a radio frequency transmission surface coil as claimed in claim 1, wherein: the method for improving the uniformity corresponding to the field position information in the imaged object comprises the following steps:
calculating a distance difference value between a central point corresponding to the field position information in the imaging object and a preset central point position;
judging whether the distance difference is smaller than a preset reference difference or not;
If the distance difference is smaller than the reference difference, prompting;
if the distance difference is larger than or equal to the reference difference, comparing the inductor information and the capacitor information stored in the preset inductor database to find out the inductor information corresponding to the capacitor information, and connecting an inductor to the capacitor in parallel according to the inductor information.
7. A component placement system based on a radio frequency transmission surface coil, comprising the component placement method based on a radio frequency transmission surface coil according to claim 1, characterized by comprising:
the acquisition module is used for acquiring the position information of the inner field of the current imaging object;
the searching module is used for performing matching searching according to the imaging object internal field position information and the capacitor information stored in the preset component parameter information database so as to determine the corresponding capacitor information in the imaging object internal field position information;
the assembling module is used for assembling the radio frequency transmitting surface coil according to the preset annular circuit board information and the capacitor information;
the capacitor layout distribution module is used for acquiring the layout of the capacitors;
the imaging object internal field position acquisition module is used for acquiring internal field position information of an imaging object;
And the processing module is connected with the acquisition module, the searching module, the capacitor layout distribution module, the imaging object internal field position acquisition module and the assembly module and is used for storing and processing information.
8. A coil comprising the method for laying out components based on the radio frequency transmission surface coil according to claim 1, wherein the method comprises a ring-shaped circuit board electrically connected with alternating current, and a large capacitor bank and a small capacitor bank are arranged on the ring-shaped circuit board;
and the annular circuit board is also provided with a matching capacitor electrically connected with alternating current so as to ensure that the coil works at the magnetic resonance working frequency.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111415664.0A CN113933770B (en) | 2021-11-25 | 2021-11-25 | Component layout method and system based on radio frequency emission surface coil and coil |
| PCT/CN2022/106116 WO2023093082A1 (en) | 2021-11-25 | 2022-07-15 | Component layout method and system based on radio-frequency emission surface coil, and coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111415664.0A CN113933770B (en) | 2021-11-25 | 2021-11-25 | Component layout method and system based on radio frequency emission surface coil and coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113933770A CN113933770A (en) | 2022-01-14 |
| CN113933770B true CN113933770B (en) | 2022-06-28 |
Family
ID=79288168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111415664.0A Active CN113933770B (en) | 2021-11-25 | 2021-11-25 | Component layout method and system based on radio frequency emission surface coil and coil |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113933770B (en) |
| WO (1) | WO2023093082A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933770B (en) * | 2021-11-25 | 2022-06-28 | 浙江大学 | Component layout method and system based on radio frequency emission surface coil and coil |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1024025A (en) * | 1996-07-15 | 1998-01-27 | Toshiba Corp | Rf coil unit for mri and coil regulating method |
| EP1882191A1 (en) * | 2005-03-16 | 2008-01-30 | Koninklijke Philips Electronics N.V. | Optical decoupling, tuning and shimming of magnetic resonance coils |
| CN101190127A (en) * | 2006-11-29 | 2008-06-04 | 北京万东医疗装备股份有限公司 | Radio frequency coil for flat plate structure |
| US8049502B2 (en) * | 2008-07-18 | 2011-11-01 | The Board Of Trustees Of The University Of Illinois | Tunable radio-frequency coil |
| CN101510806B (en) * | 2009-03-06 | 2012-08-29 | 深圳市鼎立方无线技术有限公司 | Method and apparatus for testing total omnidirectional sensitivity of transmit-receive cofrequency mobile terminal |
| EP2734855B1 (en) * | 2011-07-20 | 2021-06-30 | Koninklijke Philips N.V. | Wireless local transmit coils and array with controllable load |
| CN102961138B (en) * | 2011-08-31 | 2016-06-01 | Ge医疗系统环球技术有限公司 | MRI machine, the position determining radio-frequency coil and the method selecting radio-frequency coil |
| DE102012211147B4 (en) * | 2012-06-28 | 2017-08-31 | Siemens Healthcare Gmbh | Automatic detuning of unconnected transmit-receive coils for MRI |
| US9864025B2 (en) * | 2012-06-28 | 2018-01-09 | Duke University | Magnetic resonance imaging systems for parallel transmit, receive and shim and methods of use thereof |
| CN103344927B (en) * | 2013-06-26 | 2015-09-23 | 深圳市特深电气有限公司 | Magnetic resonance radio frequency coil and magnetic resonance imaging system |
| CN103915907B (en) * | 2014-03-25 | 2016-05-11 | 复旦大学 | Principal and subordinate is from coupling magnetic resonance wireless electric energy transmission device and method of operating thereof |
| CN104698411B (en) * | 2015-02-13 | 2018-06-22 | 江苏麦格思频仪器有限公司 | For the Multi-channel radio-frequency coil of open type magnetic resonance imaging (MRI) system |
| US10495705B2 (en) * | 2015-07-15 | 2019-12-03 | Koninklijke Philips N.V. | RF transmit module with a local field monitoring unit for a magnetic resonance examination system |
| CN106842087A (en) * | 2017-01-22 | 2017-06-13 | 上海东软医疗科技有限公司 | Radio-frequency sending coil drive circuit and MR imaging apparatus |
| CN110366688B (en) * | 2017-01-31 | 2022-10-28 | 皇家飞利浦有限公司 | Inductively feeding a coil for magnetic resonance imaging |
| CN106932743B (en) * | 2017-03-23 | 2023-01-24 | 苏州美柯医疗科技有限公司 | Radio frequency coil unit and radio frequency coil for magnetic resonance imaging |
| CN107290697B (en) * | 2017-07-17 | 2020-12-04 | 上海联影医疗科技股份有限公司 | Magnetic resonance radio frequency coil and magnetic resonance system |
| CN107632278A (en) * | 2017-08-31 | 2018-01-26 | 上海联影医疗科技有限公司 | Magnetic resonance system and MR imaging method |
| CN108680882B (en) * | 2018-06-28 | 2019-08-27 | 深圳先进技术研究院 | A kind of double-core coil device and double-core radio frequency array lines coil apparatus |
| CN208860944U (en) * | 2018-08-07 | 2019-05-14 | 上海辰光医疗科技股份有限公司 | Use the magnetic resonance radio frequency coil structure of distributed capacitor |
| CN210142181U (en) * | 2019-06-05 | 2020-03-13 | 江苏麦格迈医学科技有限公司 | Nuclear magnetic resonance analysis probe with high signal-to-noise ratio and low dead time |
| CN211022668U (en) * | 2019-08-14 | 2020-07-17 | 内蒙古医科大学附属医院 | Adjustable nuclear magnetic resonance imaging coil |
| US20230110217A1 (en) * | 2020-02-20 | 2023-04-13 | Promaxo, Inc. | Radio frequency reception coil networks for single-sided magnetic resonance imaging |
| CN113933770B (en) * | 2021-11-25 | 2022-06-28 | 浙江大学 | Component layout method and system based on radio frequency emission surface coil and coil |
-
2021
- 2021-11-25 CN CN202111415664.0A patent/CN113933770B/en active Active
-
2022
- 2022-07-15 WO PCT/CN2022/106116 patent/WO2023093082A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CN113933770A (en) | 2022-01-14 |
| WO2023093082A1 (en) | 2023-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7589530B2 (en) | Coil device and nuclear magnetic resonance imaging apparatus using the same | |
| CN113933770B (en) | Component layout method and system based on radio frequency emission surface coil and coil | |
| CN109038850B (en) | Device, equipment and method for detecting metal foreign matters in wireless charging system | |
| US8742759B2 (en) | High-frequency coil and magnetic resonance imaging device | |
| US4620155A (en) | Nuclear magnetic resonance imaging antenna subsystem having a plurality of non-orthogonal surface coils | |
| JP6640845B2 (en) | Excitation distribution MRI birdcage coil | |
| EP0687919B1 (en) | Magnet assembly | |
| US20130069652A1 (en) | Rf coil and magnetic resonance imaging device | |
| US8686728B2 (en) | System for adapting an RF transmission magnetic field for image acquisition | |
| US20070285096A1 (en) | Double-tuned RF coil | |
| US20120313645A1 (en) | Local coil system, transmitting device, magnetic resonance system and method for the wireless transfer of energy to a local coil system | |
| CA2255825C (en) | Quadrature elliptical birdcage coil for nmr | |
| CN103389480B (en) | The whole-body coil and magnetic resonance tomography apparatus of magnetic resonance tomography apparatus | |
| CA2655619A1 (en) | Resonant circuit tuning system with dynamic impedance matching | |
| JP2588552B2 (en) | Magnetic resonance imaging device | |
| JP6706270B2 (en) | Auxiliary receiver coil for adjusting receiver voltage and reactance | |
| CN107465273B (en) | Wireless power supply method and wireless power supply device | |
| EP1085337A2 (en) | Birdcage RF coil for magnetic resonance | |
| US10310035B2 (en) | Body coil and magnetic resonance imaging system | |
| DE102017211491A1 (en) | Angle of rotation sensor assembly, LiDAR system, working device and operating method for a LiDar system | |
| CN110312942A (en) | RF coil apparatus and RF shielding device for different MRI modes | |
| CN1445558A (en) | High frequency antenna for magnetic resonance device | |
| US10295622B2 (en) | Signaling a tuning of adjustment parameters of a coil arrangement | |
| CN111134676A (en) | Control method of wireless charging system | |
| US9829552B2 (en) | Transmission arrangement for a tomograph |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |