CN117438170A - Ring coil, manufacturing method thereof and magnetic resonance system - Google Patents

Abstract

The invention relates to a toroidal coil, a method of manufacturing the toroidal coil, and a magnetic resonance system. The toroidal coil includes: the first coil is provided with a first notch and a second notch, and comprises a first wire end and a second wire end corresponding to the first notch, and a third wire end and a fourth wire end corresponding to the second notch; the second coil is provided with a third notch, the third notch and the second notch are positioned at the same circumferential position, and the second coil comprises a fifth wire end and a sixth wire end which correspond to the third notch; the third wire end is electrically connected to the sixth wire end through the first connecting bridge; the fourth wire end is electrically connected to the fifth wire end through the second connecting bridge; the second connecting bridge is arranged at intervals with the first connecting bridge along the axial direction of the first coil. The toroidal coil is capable of sensitively recognizing a signal.

Description

Ring coil, manufacturing method thereof and magnetic resonance system

Technical Field

The invention relates to the technical field of circuits, in particular to a ring coil, a manufacturing method thereof and a magnetic resonance system.

Background

The magnetic resonance system is an imaging system that uses the characteristics of nuclear spin motion to display images. The operation of the magnetic resonance system may be generally as follows: in the externally applied magnetic field, the signal is generated after being excited by the radio frequency pulse, the signal is detected by a detector and is input into a computer, and the signal is processed and converted on a screen.

In a magnetic resonance system, coils may be utilized to obtain signals. The sensitivity of a coil is related to the area of its structure and also to the distance it is placed between the imaged objects, with limited sensitivity adjustment of the coil under defined physical dimensions of the coil itself.

Under the condition that physical dimensions are limited, the sensitivity of the coil manufactured based on the general configuration is insufficient.

Disclosure of Invention

In view of this, it is necessary to provide a toroidal coil, a method of manufacturing the toroidal coil, and a magnetic resonance system, which solve the problem of coil insensitivity in magnetic resonance detection.

The invention provides a toroidal coil for a magnetic resonance system, the toroidal coil comprising: the first coil is provided with a first notch and a second notch, and comprises a first wire end and a second wire end corresponding to the first notch, and a third wire end and a fourth wire end corresponding to the second notch; the second coil is provided with a third notch, the third notch and the second notch are positioned at the same circumferential position, and the second coil comprises a fifth wire end and a sixth wire end which correspond to the third notch; the third wire end is electrically connected to the sixth wire end through the first connecting bridge; and the fourth wire end is electrically connected to the fifth wire end through the second connecting bridge, and the second connecting bridge and the first connecting bridge are arranged at intervals along the axial direction of the first coil.

The annular coil provided by the invention can sensitively identify and output signals. In the case of limited physical dimensions, a good adaptation according to different sensitivity requirements can be achieved by setting the diameter of the first coil or the diameter of the second coil in the formed annular coil.

In some embodiments, the first coil has an axial dimension that is less than a wall thickness of the first coil in a radial direction, and the second coil has an axial dimension that is less than a wall thickness of the second coil in a radial direction; the first coil and the second coil respectively comprise a tuning capacitor.

The annular coil is thinner, can be suitable for the space with limited thickness, and can ensure the tuning capability of the annular coil.

The first connection bridge protrudes axially from one side of the first coil, and the second connection bridge protrudes axially from the other side of the first coil, and the annular coil further includes a dielectric portion between the first connection bridge and the second connection bridge.

By this arrangement, insulation between the first connection bridge and the second connection bridge can be ensured.

In some embodiments, the first coil has an axial dimension that is greater than a wall thickness of the first coil in a radial direction, and the second coil has an axial dimension that is greater than a wall thickness of the second coil in a radial direction.

By the arrangement, parasitic capacitance can be realized between the first coil and the second coil, and then tuning effect is realized. Therefore, a series tuning capacitor is not required to be arranged, and the circuit structure is simplified.

In some embodiments, the first coil is disposed concentric with the second coil, and the first coil and the second coil are disposed with a dielectric layer.

The device can separate adjacent coils, improve the sensitivity adjusting capability of the annular coil, and ensure the accuracy of induced current in the annular coil.

In some embodiments, the annular coil further comprises a third coil provided with a fourth notch, the third coil is arranged concentrically with the first coil, the fourth notch and the second notch are located at the same circumferential position, and the third coil comprises a seventh wire end corresponding to the fourth notch and an eighth wire end corresponding to the fourth notch; the annular coil further comprises a third connecting bridge, the fourth wire end is electrically connected to the seventh wire end through the second connecting bridge, and the eighth wire end is electrically connected to the fifth wire end through the third connecting bridge.

So arranged, in the face of a light load, increasing the number of coils in the loop coil can improve the sensitivity; at the same time, the noise is still in a low level state due to light load, so that the signal to noise ratio can be improved.

In some embodiments, the toroidal coil further includes a signal processing circuit electrically connected to the first coil; the signal processing circuit comprises a first matching capacitor, a first inductance element, a second inductance element, a first blocking capacitor, a second blocking capacitor, a first regulating diode and an amplifier; the first matching capacitor is connected in series between the first line end and the second line end; the first input end of the amplifier is electrically connected to the first line end sequentially through the first blocking capacitor and the first inductance element, and the second input end of the amplifier is electrically connected to the second line end sequentially through the second blocking capacitor and the second inductance element; the first regulating diode, the first matching capacitor, the first inductance element and the second inductance element are sequentially arranged to form a loop.

By the arrangement, the annular coil can be controlled to switch between a tuning state and a detuning state, and then the annular coil can be switched between an operating state and a non-operating state.

In some embodiments, the signal processing circuit further comprises a second matching capacitor, a third inductive element, and a second regulation diode; the second matching capacitor is connected in series between the first matching capacitor and the second line end, the third inductance element, the second matching capacitor, the second inductance element and the second regulating diode are sequentially arranged to form a loop, and the second regulating diode is connected with the first regulating diode in sequence.

By the arrangement, a multi-stage series detuning control loop can be formed, and the detuning effect of the multi-turn annular loop in use can be improved.

The invention also provides a magnetic resonance system comprising: the aforementioned toroidal coil.

The magnetic resonance system provided by the invention can sensitively perform magnetic resonance detection, and has a good signal detection effect.

The present invention also provides, in another aspect, a method of manufacturing a toroidal coil, the method comprising: forming a first coil, wherein the first coil is provided with a first notch and a second notch, and the first coil comprises a first wire end and a second wire end corresponding to the first notch, and a third wire end and a fourth wire end corresponding to the second notch; forming a second coil, wherein a third notch is formed in the second coil, the third notch and the second notch are positioned at the same circumferential position, and the second coil comprises a fifth wire end and a sixth wire end which correspond to the third notch; electrically connecting the third wire end to the sixth wire end through the first connecting bridge; and electrically connecting the fourth wire end to the fifth wire end through a second connecting bridge, wherein the second connecting bridge is arranged at intervals from the first connecting bridge along the axial direction of the first coil.

The manufacturing method provided by the invention can form a sensitive annular coil. In the case where the working environment of the loop coil is limited, so that the size of the loop coil to be formed is limited, the manufacturing method of the loop coil can control at least the diameter of the first coil or the diameter of the second coil, so that the loop coil can be well adapted to the working environment and achieve high sensitivity.

In some embodiments, at least two coils including a first coil and a second coil are formed, the at least two coils being concentrically arranged and each coil having a dimension in the direction of the central axis that is greater than the wall thickness of the coil in the radial direction; and forming a dielectric layer with a predetermined dielectric constant, the dielectric layer being located between two adjacent coils with a predetermined interval.

By this arrangement, a signal circuit which is easy to tune and sensitive to detection can be formed. In addition, the coil structure can be accurately and flexibly configured according to the requirements, and the tuning effect is realized.

Drawings

FIG. 1 is a schematic layout of a toroidal coil provided by the present invention;

FIG. 2 is a schematic view of a partial structure of an annular coil according to an embodiment of the present invention;

FIG. 3 is a schematic layout of a toroidal coil provided by the present invention;

FIG. 4 is a schematic layout of a toroidal coil provided by the present invention;

FIG. 5 is a schematic block diagram of an annular coil in an embodiment of the invention;

figure 6 is a schematic block diagram of a magnetic resonance system provided by the present invention;

fig. 7 is a schematic flow chart of a method for manufacturing a toroidal coil according to the present invention.

Reference numerals illustrate: 1. a first coil; 101. a first wire end; 102. a second wire end; 103. a third wire end; 104. a fourth wire end; 110. a first connection bridge; 2. a second coil; 201. a fifth wire end; 202. a sixth wire end; 210. a second connecting bridge; 3. tuning the capacitance; 4. a first matching capacitor; 5. a second matching capacitor; 6. a third coil; 601. a seventh wire end; 602. an eighth wire end; 610. a third connecting bridge;

100. a toroidal coil; 200. a coil structure; 300. a signal processing circuit;

310. a first input line; 311. a first inductance element; 312. a first blocking capacitor; 320. a second input line; 321. a second inductance element; 322. a second blocking capacitor; 330. regulating and controlling a circuit; 331. a first regulation diode; 340. a detuned circuit; 341. a third inductance element; 342. a second regulation diode; 350. a signal output line; 360. an amplifier; 361. a first input; 362. a second input terminal; 363. an output end;

400. a display.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific examples of embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. For example, the first coil may also be referred to as a second coil, and the second coil may also be referred to as a first coil. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be flexible connection or rigid connection along at least one direction; can be mechanically or electrically connected; either directly, indirectly, through intermediaries, or both, or in which case the intermediaries are present, or in which case the two elements are in communication or in which case they interact, unless explicitly stated otherwise. The terms "mounted," "disposed," "secured," and the like may be construed broadly as connected. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

As used herein, the terms "layer," "region" and "regions" refer to portions of material that include regions having a certain thickness. The layers can extend horizontally, vertically and/or along a tapered surface. The layer can be a region of uniform or non-uniform continuous structure, whose thickness perpendicular to the direction of extension may be no greater than the thickness of the continuous structure. The layers can include multiple layers, either stacked or discretely extending. The various regions in the figures, the shapes of the layers and their relative sizes and positional relationships are exemplary only, as may be subject to variations due to manufacturing tolerances or technical limitations, and may be adjusted to actual requirements.

Referring to fig. 1, fig. 1 shows a toroidal coil in an embodiment of the present invention. The toroidal coil 100 provided by embodiments of the present invention may include a coil structure 200 and a signal processing circuit 300. The coil structure 200 is capable of outputting a signal to the signal processing circuit 300.

The coil structure 200 comprises at least two coils, which are illustratively arranged concentrically. In some embodiments, as shown in fig. 1, the toroidal coil 100 includes a first coil 1 and a second coil 2. The first coil 1 and the second coil 2 are concentrically arranged, and the two coils can be integrally arranged in the same plane. The first coil 1 has a larger diameter and is sleeved outside the second coil 2. Illustratively, the first coil 1 is substantially circularly wound and the second coil 2 is substantially circularly wound.

Referring to fig. 2, fig. 2 illustrates the cross-linking of the loop coil in an embodiment of the invention. The first coil 1 and the second coil 2 may be wound in the XY plane. The coil structure 200 further includes a first connection bridge 110 and a second connection bridge 210. The first coil 1 and the second coil 2 are electrically connected by the first connecting bridge 110 and the second connecting bridge 210, and the first coil 1 and the second coil 2 are electrically insulated in the radial direction.

The first coil 1 is provided with a first notch and a second notch, each of which is illustratively less than 1/10 of the circumference of the first coil 1. The first coil 1 includes a first wire end 101 corresponding to the first notch, a second wire end 102 corresponding to the first notch, a third wire end 103 corresponding to the second notch, and a fourth wire end 104 corresponding to the second notch. The first wire end 101 and the second wire end 102 may be used for external connection of the coil structure 200, for example, electrically connected to the signal processing circuit 300.

The second coil 2 is provided with a third notch, the third notch and the second notch are located at the same circumferential position, and the second coil 2 includes a fifth wire end 201 corresponding to the third notch and a sixth wire end 202 corresponding to the third notch. The third wire end 103 is electrically connected to the sixth wire end 202 through the first connection bridge 110, and the fifth wire end 201 may be electrically connected to the fourth wire end 104 through the second connection bridge 210.

The second connection bridge 210 is spaced apart from the first connection bridge 110 in the axial direction of the first coil 1, i.e., in the Z-axis direction. The material of each of the second connection bridge 210 and the first connection bridge 110 may be the same as that of the first coil 1, and the cross-sectional area of each of the second connection bridge 210 and the first connection bridge 110 may be the same as that of the first coil 1. In other embodiments, the material of the second connection bridge 210 and the material of the first connection bridge 110 may be smaller than the material resistance of the first coil 1, and thus the cross-sectional area of the second connection bridge 210 and the cross-sectional area of the first connection bridge 110 may be smaller than the cross-sectional area of the first coil 1.

The annular coil provided by the invention can realize the adjustment of the sensitivity of the annular coil under the condition of limited external dimension by configuring the number of coils and the gaps among the coils in the annular coil. The annular coil provided by the invention can realize sensitive detection in a targeted manner.

Illustratively, the coils of the toroidal coil 100 may be formed using a copper-clad process, and the coils may be formed on the same substrate, such as a flexible or rigid substrate. The material of each coil comprises copper or other metal of high electrical conductivity.

As shown in fig. 1 and 2, in some embodiments, the first coil 1 has an axial dimension that is less than the wall thickness of the first coil 1 in the radial direction, and the second coil 2 has an axial dimension that is less than the wall thickness of the second coil 2 in the radial direction. The first coil 1 and the second coil 2 each comprise a tuning capacitor 3. In the present invention, various numbers of coils can be arranged, various sizes of coil intervals can be arranged, and the resonance frequency of the coil structure 200 can be ensured to be suitable for operation by arranging the tuning capacitor 3 on the coils. Tuning capacitors 3 may be provided for each coil. Illustratively, the tuning capacitance 3 of the first coil 1 and the tuning capacitance 3 of the second coil 2 may be located at the same position in the circumferential direction. Illustratively, the tuning capacitances 3 within each coil may be evenly distributed in the circumferential direction.

As shown in fig. 2, the first connection bridge 110 and the second connection bridge 210 may be stacked in the Z-axis direction. The first connecting bridge 110 protrudes from one side of the first coil 1 in the axial direction, and the second connecting bridge 210 protrudes from the other side of the first coil 1 in the axial direction. The first connection bridge 110 may be integrally higher than the first coil 1, and the second connection bridge 210 may be integrally lower than the first coil 1. Illustratively, the toroidal coil 100 further includes a dielectric portion (not shown) between the first and second connection bridges 110 and 210 to avoid shorting the first and second connection bridges 110 and 210.

Optionally, the material of the dielectric part comprises Polyimide (PI) or epoxy glass fiber (FR-4), the dielectric part is easy to form and can ensure insulation performance. In some cases, air is regarded as a dielectric portion, which in turn has a relative dielectric constant of 1. Illustratively, the dielectric portion has a relative permittivity greater than 2.7. In some embodiments, the dimension of the dielectric portion in the Z-axis direction may be set to be not smaller than the dimension of the first coil 1 in the Z-axis direction.

Referring to fig. 1, the signal processing circuit 300 may include a first input line 310, a second input line 320, and a signal output line 350. Illustratively, the signal processing circuit 300 may include a signal processing module to process signals. The signal processing module may receive signals of the first input line 310 and the second input line 320 and may output signals to the signal output line 350.

The first wire end 101 of the first coil 1 is electrically connected to the first input line 310, and the second wire end 102 of the first coil 1 is electrically connected to the second input line 320. The induction signal generated by the coil structure 200 may be output from the first wire end 101 and the second wire end 102; the signal processing circuit 300 may receive signals through a first input line 310 and a second input line 320.

In some embodiments, the signal processing circuit 300 of the toroidal coil 100 may include a first inductive element 311, a second inductive element 321, a first blocking capacitor 312, a second blocking capacitor 322, a first steering diode 331, and an amplifier 360.

The first input line 310 may include a first inductive element 311 and the second input line 320 may include a second inductive element 321. The first input 361 of the amplifier 360 is electrically connected to the first input line 310, and the second input 362 of the amplifier 360 is electrically connected to the second input line 320. Specifically, the first input 361 of the amplifier 360 is electrically connected to the first line terminal 101 through the first blocking capacitor 312 and the first inductance element 311 in sequence; the second input terminal 362 of the amplifier 360 is electrically connected to the second line terminal 102 through the second blocking capacitor 322 and the second inductance element 321 in sequence. The output 363 of the amplifier 360 is electrically connected to the signal output line 350. The amplifier 360 may amplify the signal and output the amplified signal. The signal processing circuit 300 implements processing, such as amplification processing, and output of the signals of the coil structure 200.

Illustratively, the signal processing circuit 300 may include a first matching capacitor 4. The first matching capacitor 4 is connected in series between the first line terminal 101 and the second line terminal 102. The first regulating diode 331, the first matching capacitor 4, the first inductance element 311 and the second inductance element 321 are sequentially arranged to form a loop.

In some embodiments, the signal processing circuit 300 may include a regulation circuit 330. The regulation circuit 330 and the first input circuit 310 and the second input circuit 320 may have a node therebetween, where the node in the first input circuit 310 is located at a distal end of the first inductance element 311 relative to the first matching capacitor 4, and the node in the second input circuit 320 is located at a distal end of the second inductance element 321 relative to the first matching capacitor 4.

The regulation line 330 may include a first regulation diode 331. The first regulating diode 331 and the first matching capacitor 4, the first inductance element 311 and the second inductance element 321 form a loop. The loop is a resonant loop connected in parallel with the coil structure 200. Illustratively, the first steering diode 331 may be a PIN diode. The anode of the first regulating diode 331 may be connected to the first inductance element 311, and the cathode may be connected to the second inductance element 321.

When the toroidal coil 100 is used, the state of the first tuning diode 331 can be controlled by the control signal V, and then the state of the coil structure 200 is controlled to be a tuning state or a detuning state. The toroidal coil 100 provided by the present invention can be controllably operated or not operated.

Illustratively, the signal processing circuit 300 includes a second matching capacitor 5, a third inductive element 341, and a second steering diode 342. The second matching capacitor 5 is connected in series between the first matching capacitor 4 and the second line terminal 102, and also between the second inductance element 321 and the second line terminal 102. The third inductance element 341, the second matching capacitor 5, the second inductance element 321, and the second regulation diode 342 are sequentially disposed to form a loop. The loop may be a detuned loop for ensuring a detuning effect of the coil structure 200.

Illustratively, the signal processing circuit 300 may include a detuned line 340, and the detuned line 340 may include the third inductive element 341. The steering circuit 330 may include the second steering diode 342. The second regulating diode 342 is connected with the first regulating diode 331 in series, and the second regulating diode 342 can be controlled by the regulating circuit 330.

For example, a multi-pole series, parallel detuning circuit may be provided in the toroidal coil 100 with respect to the coil structure 200. Helping to ensure the detuning effect of the complex-structured, high-sensitivity coil structure 200. Illustratively, the negative electrode of the steering diode may be grounded in the steering circuit 330.

Referring to fig. 3, fig. 3 shows a toroidal coil in an embodiment of the present invention. In some embodiments, toroidal coil 100 may include a coil structure 200 and a signal processing circuit 300. In this coil structure 200, the diameter of the first coil 1 and the diameter of the second coil 2 differ greatly, and the radial spacing of the first coil 1 and the second coil 2 is large. The toroidal coil 100 can achieve high sensitivity for a specific use environment.

Referring to fig. 4, fig. 4 shows a toroidal coil in an embodiment of the present invention. In some embodiments, toroidal coil 100 may include a coil structure 200 and a signal processing circuit 300. The coil structure 200 includes a first coil 1, a second coil 2, and a third coil 6. The first coil 1, the second coil 2 and the third coil 6 are concentrically arranged. Illustratively, the diameter differences of the coils are small.

For light load measurements, the number of coils in the coil structure 200 may be increased, for example, implemented as three or more as shown in fig. 4. The toroidal coil 100 shown in fig. 4 may have high sensitivity for light load, and although a larger number of coils affects the load noise coupling resistance, noise under light load conditions is in a low level state, so the toroidal coil 100 may achieve a high signal-to-noise ratio.

Illustratively, the third coil 6 is provided with a fourth notch, which is located at the same circumferential position as the second notch of the first coil 1. The third coil 6 includes a seventh wire end 601 corresponding to the fourth notch and an eighth wire end 602 corresponding to the fourth notch. The toroidal coil 100 further includes a third connecting bridge 610, the fourth wire end 104 is electrically connected to the seventh wire end 601 through the second connecting bridge 210, and the eighth wire end 602 is electrically connected to the fifth wire end 201 through the third connecting bridge 610. Understandably, the fourth wire end 104 is electrically connected to the second coil 2 indirectly through the second connection bridge 210.

Referring to fig. 4, the first coil 1, the second coil 2 and the third coil 6 are sleeved in sequence from outside to inside, and the three coils are concentric and can be basically coplanar. In the clockwise direction as shown in the drawing, the first coil 1 is electrically connected to the second coil 2, the second coil 2 is electrically connected to the third coil 6, and the third coil 6 is electrically connected to the first coil 1. The connection bridges for electrically connecting the coils in the coil structure 200 are separated by the dielectric portion, and bridging of the connection bridges can be avoided.

Illustratively, a first matching capacitor 4 may be connected in series between the first line terminal 101 and the second line terminal 102. All the connection bridges may be located approximately 180 deg. from the first matching capacitance 4 in the circumferential direction of the coil structure 200. This arrangement facilitates a uniform distribution of the current in the coil structure 200. Illustratively, each coil in the coil structure 200 is provided with a tuning capacitance 3. The tuning capacitor 3 may be located at a position of approximately 90 deg. to the first matching capacitor 4 in the circumferential direction of the coil structure 200, helping to adjust the resonance frequency of the coil structure 200.

The annular coil provided by the embodiment of the invention has good sensitivity. The spacing of the coils in the toroidal coil is configured to provide the coil structure with a suitable sensitivity. The toroidal coils also include a dielectric layer between adjacent two coils. The material of the dielectric layer can be the same as that of the dielectric part, and the dielectric layer is convenient to form and can ensure dielectric property. The dielectric constant of the dielectric layer between the coils can be configured according to sensitivity requirements.

As shown in fig. 5, in the toroidal coil 100 provided by the present invention, the coil structure 200 may be a vertical-type structure. The dimension of each of the at least two coils in the coil structure 200 in the direction of the central axis is greater than the respective wall thickness in the radial direction. The coil structure 200 may have parasitic capacitance that helps to adjust the resonant frequency of the coil structure 200. Illustratively, the coils are uniform in size and aligned along the central axis. In fig. 5, the central axis of the coil may be substantially parallel to the Z-axis direction.

The second coil 2 is located inside the first coil 1, and a first wire end 101 and a second wire end 102 in the first coil 1 are used for electrical connection to the signal processing circuit 300. The coil structure 200 may not be provided with the tuning capacitor 3. The number of vertical-surface coils in the coil structure 200 may be greater, and the pitch, the height along the central axis, the dielectric constant of the dielectric layer, and the number of coils of each coil may be configured to ensure the sensitivity and the operating frequency of the coil structure 200.

All coils of the coil structure 200 may be vertical-type coils and may not be provided with the tuning capacitor 3. The coil structure 200 is compact in structure, and has a continuous and complete external dimension.

Referring to figure 6, the present invention provides a magnetic resonance system. In some embodiments, the magnetic resonance system includes a toroidal coil 100 and a display 400. The toroidal coil 100 is electrically, i.e. communicatively, connected to the display 400.

The toroidal coil 100 may be the aforementioned embodiment, the toroidal coil 100 being used for magnetic resonance detection. The signal processing circuit 300 may receive the signal of the coil structure 200 and emit a signal. The signal processing circuit 300 may be electrically connected to the display 400, for example, the signal output line 350 of the signal processing circuit 300 is electrically connected to the display 400.

The display 400 may display data or images based on the signal emitted by the toroidal coil 100.

The magnetic resonance system provided by the invention can sensitively identify the magnetic resonance signals. The magnetic resonance system can realize tuning well through a coil structure and can realize effective detuning through the topological structure of a designed signal processing circuit.

The present invention provides a method for forming a toroidal coil. The method of forming the toroidal coil may be a manufacturing method or a design method. Referring to fig. 7, an exemplary method 1000 of manufacturing a toroidal coil may include steps S101, S102, S103, and S104 described below.

Step S101, forming a first coil 1. Referring to fig. 1, the first coil 1 is provided with a first notch and a second notch, and the first coil 1 includes a first wire end 101 corresponding to the first notch, a second wire end 102 corresponding to the first notch, a third wire end 103 corresponding to the second notch, and a fourth wire end 104 corresponding to the second notch.

Step S102, forming a second coil. Specifically, the second coil 2 disposed concentrically with the first coil 1 may be formed. The second coil 2 is provided with a third notch, the third notch and the second notch are located at the same circumferential position, and the second coil 2 includes a fifth wire end 201 corresponding to the third notch and a sixth wire end 202 corresponding to the third notch.

In step S103, the third wire end 103 is electrically connected to the sixth wire end 202 through the first connection bridge 110.

In step S104, the fourth wire end 104 is electrically connected to the fifth wire end 201 through the second connection bridge 210. The second connection bridge 210 is spaced apart from the first connection bridge 110 in the axial direction of the first coil 1.

The manufacturing method of the annular coil provided by the invention can form the annular coil with good sensitivity.

In some embodiments, the overall steps of forming the coil structure 200 include at least the aforementioned step S101 and step S102, specifically including: forming a coil including a tuning capacitor 3; and configuring the number of coils and the spacing between coils to adjust the sensitivity of the coil structure 200. The manufacturing method can make the sensitivity of the coil structure 200 appropriate.

In some embodiments, in step S101 and step S102, the dimensions of the coils in the direction of the central axis are larger than the wall thickness of the coils in the radial direction. The general steps of forming the coil structure 200 include the steps of configuring the number of coils and the spacing between the coils.

Illustratively, the method 1000 of manufacturing a toroidal coil further includes step S105, forming a dielectric layer. The general steps of forming the coil structure 200 include the steps of forming a dielectric layer between two adjacent coils, and configuring the dielectric constant of the dielectric layer. A dielectric layer is positioned between adjacent two coils having a predetermined spacing, the dielectric layer being configured to have a predetermined dielectric constant. The manufacturing method provided by the invention can adjust the sensitivity of the coil structure, and avoids the limitation of the sensitivity adjustment of the annular coil.

Illustratively, the method 1000 of manufacturing a toroidal coil further includes the step of forming the signal processing circuit 300; and step S106, electrically connecting the coil structure 200 with the signal processing circuit 300. The signal processing circuit 300 may be assembled and connected by the electronic components in the foregoing embodiments.

The technical features of the embodiments disclosed above may be combined in any way, and for brevity, all of the possible combinations of the technical features of the embodiments described above are not described, however, they should be considered as the scope of the description provided in this specification as long as there is no contradiction between the combinations of the technical features.

In the embodiments disclosed above, the order of execution of the steps is not limited, and may be performed in parallel, or performed in a different order, unless explicitly stated and defined otherwise. The sub-steps of the steps may also be performed in an interleaved manner. Various forms of procedures described above may be used and steps may be reordered, added, or deleted as long as the desired results of the technical solutions provided by the present invention are achieved, and are not limited herein.

The above disclosed examples represent only a few embodiments of the invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the inventive concept, which falls within the scope of the invention as claimed. The scope of the invention should, therefore, be determined with reference to the appended claims.

Claims (10)

1. Toroidal coil for a magnetic resonance system, characterized in that the toroidal coil (100) comprises:

the first coil (1) is provided with a first notch and a second notch, and the first coil (1) comprises a first wire end (101) and a second wire end (102) corresponding to the first notch, and a third wire end (103) and a fourth wire end (104) corresponding to the second notch;

a second coil (2), wherein a third gap is formed in the second coil (2), the third gap and the second gap are located at the same circumferential position, and the second coil (2) comprises a fifth wire end (201) and a sixth wire end (202) corresponding to the third gap;

-a first connection bridge (110), said third wire end (103) being electrically connected to said sixth wire end (202) through said first connection bridge (110); and

-a second connection bridge (210), said fourth wire end (104) being electrically connected to said fifth wire end (201) through said second connection bridge (210); the second connecting bridge (210) is arranged at intervals from the first connecting bridge (110) along the axial direction of the first coil (1).

2. The toroidal coil according to claim 1, characterized in that the dimension of the first coil (1) in the axial direction is smaller than the wall thickness of the first coil (1) in the radial direction, and the dimension of the second coil (2) in the axial direction is smaller than the wall thickness of the second coil (2) in the radial direction;

the first coil (1) and the second coil (2) respectively comprise a tuning capacitor (3);

the first connecting bridge (110) protrudes from one side of the first coil (1) along the axial direction, the second connecting bridge (210) protrudes from the other side of the first coil (1) along the axial direction, and the annular coil (100) further comprises a medium part positioned between the first connecting bridge (110) and the second connecting bridge (210).

3. The toroidal coil according to claim 1, characterized in that the dimension of the first coil (1) in the axial direction is larger than the wall thickness of the first coil (1) in the radial direction, and the dimension of the second coil (2) in the axial direction is larger than the wall thickness of the second coil (2) in the radial direction.

4. A toroidal coil according to claim 3, characterized in that the first coil (1) is arranged concentrically with the second coil (2) and that a dielectric layer is arranged between the first coil (1) and the second coil (2).

5. The toroidal coil according to claim 1, further comprising a third coil (6) provided with a fourth notch, the third coil (6) being arranged concentric to the first coil (1), the fourth notch being located at the same circumferential position as the second notch, the third coil (6) comprising a seventh wire end (601) corresponding to the fourth notch and an eighth wire end (602) corresponding to the fourth notch;

the toroidal coil (100) further comprises a third connecting bridge (610), the fourth wire end (104) is electrically connected to the seventh wire end (601) through the second connecting bridge (210), and the eighth wire end (602) is electrically connected to the fifth wire end (201) through the third connecting bridge (610).

6. The toroidal coil according to any one of claims 1 to 5, further comprising a signal processing circuit (300) electrically connected to the first coil (1);

the signal processing circuit (300) comprises a first matching capacitor (4), a first inductance element (311), a second inductance element (321), a first blocking capacitor (312), a second blocking capacitor (322), a first regulating diode (331) and an amplifier (360);

the first matching capacitor (4) is connected in series between the first line end (101) and the second line end (102); a first input end (361) of the amplifier (360) is electrically connected to the first line end (101) through the first blocking capacitor (312) and the first inductance element (311) in sequence, and a second input end (362) of the amplifier (360) is electrically connected to the second line end (102) through the second blocking capacitor (322) and the second inductance element (321) in sequence; the first regulating diode (331), the first matching capacitor (4), the first inductance element (311) and the second inductance element (321) are sequentially arranged to form a loop.

7. The toroidal coil of claim 6, wherein the signal processing circuit (300) further comprises a second matching capacitor (5), a third inductive element (341) and a second steering diode (342);

the second matching capacitor (5) is connected in series between the first matching capacitor (4) and the second line end (102), the third inductance element (341), the second matching capacitor (5), the second inductance element (321) and the second regulation diode (342) are sequentially arranged to form a loop, and the second regulation diode (342) is connected with the first regulation diode (331) in series.

8. A magnetic resonance system, comprising: the toroidal coil (100) of any one of claims 1 to 7.

9. A method of manufacturing a toroidal coil, comprising:

forming a first coil (1), wherein the first coil (1) is provided with a first notch and a second notch, and the first coil (1) comprises a first wire end (101) and a second wire end (102) corresponding to the first notch, and a third wire end (103) and a fourth wire end (104) corresponding to the second notch;

forming a second coil (2), wherein a third notch is formed in the second coil (2), the third notch and the second notch are positioned at the same circumferential position, and the second coil (2) comprises a fifth wire end (201) and a sixth wire end (202) corresponding to the third notch;

electrically connecting the third wire end (103) to the sixth wire end (202) through a first connection bridge (110); and

the fourth wire end (104) is electrically connected to the fifth wire end (201) through a second connecting bridge (210), and the second connecting bridge (210) and the first connecting bridge (110) are arranged at intervals along the axial direction of the first coil (1).

10. The method of manufacturing a toroidal coil as claimed in claim 9, comprising:

forming at least two coils comprising the first coil (1) and the second coil (2), the at least two coils being concentrically arranged and each having a dimension in the direction of the central axis that is greater than the wall thickness of the coils in the radial direction; a kind of electronic device with high-pressure air-conditioning system

A dielectric layer having a predetermined dielectric constant is formed between two adjacent ones of the coils having a predetermined interval.