A coil arrangement

Abstract

The embodiment of the present specification provides a coil device, which comprises a coil unit and a wall for fixing the coil unit; at least a partial area of the wall comprises a first material layer and second material layers respectively arranged on both sides of the first material layer; the second material layer has a smaller absorption rate for target rays than the first material layer; the first material layer has two opposite surfaces, and the coil unit is fixed to one surface of the first material layer; the first material layer is provided with a mounting hole, at least one opening of the mounting hole is located on the surface of the first material layer for fixing the coil unit, and an auxiliary circuit is accommodated in the mounting hole, and the auxiliary circuit is connected with the coil unit.

Description

Technical Field

[0001] This manual relates to the field of medical imaging, and in particular to a coil device. Background Technology

[0002] Integrated positron emission tomography (PET-MR) imaging equipment achieves precise fusion of anatomical and functional information by simultaneously acquiring magnetic resonance signals and PET photons. The radio frequency (RF) coil is a key component of the MRI equipment for signal excitation and reception, using electromagnetic induction to transmit RF pulses and receive magnetic resonance signals. The RF coil must operate simultaneously in a strong magnetic field and high-energy gamma-ray environment; its structure, material distribution, and assembly method directly affect signal sensitivity and imaging efficiency.

[0003] To address the aforementioned issues, clinical medicine generally expects to further reduce radiation attenuation differences, simplify positioning procedures, and improve patient comfort while ensuring mechanical strength. Therefore, there is an urgent need for a coil device that can provide faster and more reliable scanning capabilities. Utility Model Content

[0004] This specification provides one or more embodiments of a coil device for a PET-MR system. The coil device includes a coil unit and a wall for fixing the coil unit; at least a portion of the wall includes a first material layer and second material layers respectively disposed on both sides of the first material layer; the second material layer has a lower absorption rate for target radiation than the first material layer; the first material layer has two opposing surfaces, and the coil unit is fixed to one surface of the first material layer; the first material layer is provided with a mounting hole, at least one opening of which is located on the surface of the first material layer on which the coil unit is fixed, and the mounting hole accommodates an auxiliary circuit connected to the coil unit.

[0005] In some embodiments, the first material layer has two or more first window areas, and the second material layer has one or more second window areas. The one or more second window areas correspond one-to-one with a portion of the first window areas in the two or more first window areas, thereby forming the window areas of the wall.

[0006] In some embodiments, the wall forms a first cavity, the first material layer includes an inner surface facing the first cavity and an outer surface facing away from the first cavity, and the coil unit is disposed on the inner surface.

[0007] In some embodiments, the mounting hole is a through hole or a through-hole, and the auxiliary circuit is a circuit assembly board; a protective shell is provided on the outer surface of the first material layer, and the protective shell covers the opening of the through hole or through-hole on the outer surface of the first material layer.

[0008] In some embodiments, the coil unit is connected to the auxiliary circuit via a cable; the cable is laid on the inner or outer surface of the first material layer.

[0009] In some embodiments, the first cavity is configured to accommodate a human head; the wall includes a first part and a second part, wherein when the coil device is worn by a human body, the first part is located on the front side of the human coronal plane and the second part is located on the rear side of the human coronal plane; the first part and the second part are detachably connected or hinged.

[0010] In some embodiments, the first part has window areas corresponding to the eyes, nose and mouth respectively; the first material layer of the second part is attached to the second material layer of the second part near the first cavity; a second cavity is formed inside the second material layer of the second part away from the first cavity; the second material layer of the second part away from the first cavity has a plane that mates with the scanning bed.

[0011] In some embodiments, the first part has a first electrical interface and the second part has a second electrical interface; when the first part and the second part are closed, the first electrical interface and the second electrical interface are electrically connected.

[0012] Some embodiments of this specification also provide a coil device for a multimodal imaging system, comprising: a first part serving as an upper half of the coil device; a second part serving as a lower half of the coil device, the first part and the second part cooperating to form a first cavity; at least one of the first part and the second part includes: a coil unit; a first material layer having two opposing surfaces, the coil unit being fixed to one surface of the first material layer; the first material layer being provided with a mounting hole, at least one opening of the mounting hole being located on the surface of the first material layer on which the coil unit is fixed, the mounting hole accommodating an auxiliary circuit, the auxiliary circuit being connected to the coil unit.

[0013] In some embodiments, the first material layer is a non-metallic material with a density greater than 0.8 g / cm³, and a low-density material with a density not greater than 0.8 g / cm³ covers one surface of the coil unit fixed by the first material layer.

[0014] In some embodiments, the first material layer includes an inner surface facing the first cavity and an outer surface facing away from the first cavity, the coil unit is disposed on the inner surface of the first material layer; the mounting hole is a through hole or a through hole, the auxiliary circuit is a circuit assembly board; a protective shell is disposed on the outer surface of the first material layer, the protective shell covering the opening of the through hole or through hole on the outer surface.

[0015] In some embodiments, the first cavity can accommodate the patient's head, knee, or ankle.

[0016] Some embodiments of this specification also provide a coil device for a multimodal imaging system, comprising: a coil unit; a first material layer having two opposing surfaces, the coil unit being fixed to one surface of the first material layer; the first material layer having a mounting hole, at least one opening of the mounting hole being located on the surface of the first material layer on which the coil unit is fixed, the mounting hole containing an auxiliary circuit connected to the coil unit; a second material layer at least covering a portion of the surface of the first material layer after the coil unit is fixed; the second material layer having a lower density and a lower attenuation rate for target rays compared to the first material layer.

[0017] In some embodiments, the first material layer forms an organ contour that conforms to the object being tested. The organ contour is at least one of a head contour, a knee joint contour, a shoulder joint contour, a back contour, and a foot and ankle contour. Both surfaces of the first material layer are at least partially covered by the second material layer. The second material layer is a low-density material with a density not greater than 0.8 g / cm³.

[0018] In some embodiments, both the second material layer and the first material layer are provided with multiple window areas.

[0019] In some embodiments, the coil unit includes a plurality of coil units, and each coil unit forms a loop; the first material layer has a hollowed-out area within the area enclosed by the loop; and the second material layer covers the hollowed-out area. Attached Figure Description

[0020] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein: Figure 1 This is an exemplary schematic diagram showing the overall appearance of the coil device according to some embodiments of this specification; Figure 2 This is an exemplary structural diagram of the coil device as shown in some embodiments of this specification; Figure 3 This is an exemplary structural diagram of the first material layer shown according to some embodiments of this specification; Figure 4 This is an exemplary structural diagram of the first part shown according to some embodiments of this specification; Figure 5This is an exemplary structural diagram of the second part according to some embodiments of this specification; Figure 6 This is a schematic diagram of the first part of the solution according to some embodiments of this specification; Figure 7 This is a schematic diagram showing the connection between the first material layer and the second material layer according to some embodiments of this specification; Figure 8 This is a schematic diagram of the second part of the solution according to some embodiments of this specification; Figure 9 This is an exemplary structural diagram of a portion of the second material layer in the second part, as shown in some embodiments of this specification; Figure 10 This is a schematic diagram of the hollowed-out area shown in some embodiments of this specification; Figure 11 This is a schematic diagram illustrating the application scenario of the coil device within the aperture according to some embodiments of this specification; Figure 12 This is a schematic diagram of another application scenario of the coil device outside the aperture, as shown in some embodiments of this specification.

[0021] In the diagram: 100, coil device; 110, wall; 110-1, top forehead area; 111, first material layer; 112, second material layer; 1122-1, first sub-layer; 1122-2, second sub-layer; 113, support member; 114, hollow area; 120, protective shell; 121, coil unit; 122, auxiliary circuit; 123, cable; 124, mounting hole; 130, window area; 131, first window area; 132, second window area; 150, first part; 160, second part; 161, bottom surface; 200, first cavity; 300, radiation system; 310, aperture; 320, scanning equipment; 330, scanning bed. Detailed Implementation

[0022] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0023] It should be understood that the terms “system,” “device,” “unit,” and / or “module” used herein are one way to distinguish different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0024] Unless the context clearly indicates an exception, words such as "a," "an," "a kind," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0025] It should be understood that the terms "first," "second," and similar terms used in this specification do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Unless otherwise stated, terms such as "front," "rear," "lower," and / or "upper" are for illustrative purposes only and are not limited to a location or spatial orientation.

[0026] Figure 1 This is an exemplary schematic diagram showing the overall appearance of a coil device according to some embodiments of this specification. Figure 2 This is an exemplary structural diagram of the coil device as shown in some embodiments of this specification.

[0027] In some embodiments, such as Figure 1 , 2 As shown, the coil device 100 includes a coil unit 121 and a wall 110 for fixing the coil unit 121; at least a portion of the wall 110 includes a first material layer 111 and second material layers 112 respectively disposed on both sides of the first material layer 111. Some embodiments of the coil device provided in this specification can be used in PET-MR systems; a description of PET-MR systems follows. Figure 11 , 12 And related explanations.

[0028] The coil unit 121 is the core structure in the coil device 100 that transmits radio frequency signals or receives magnetic resonance signals. The magnetic resonance signal is a weak radio frequency signal generated by the resonance of human atomic nuclei (such as hydrogen nuclei) in an MR magnetic field. In some embodiments, the coil unit 121 can be a flexible circuit board made of copper foil or printed circuit board (PCB), which can be bent to conform to the contour of the human head.

[0029] Wall 110 is the main structure of coil device 100. In some embodiments, wall 110 includes two or more parts, such as a first part 150 and a second part 160. For a detailed description of the first part 150 and the second part 160, see [link to relevant documentation]. Figure 4 , 5 And related explanations.

[0030] The first material layer 111 is a skeleton made of a rigid material. In some embodiments, the first material layer 111 may be made of a rigid material, such as polycarbonate, polystyrene, epoxy resin, etc. The second material layer 112 is a covering layer covering the first material layer 111. In some embodiments, the second material layer 112 is made of a low-density material, which refers to a material with a low atomic number, such as polypropylene, polyurethane, carbon fiber, PEI foam, etc. In some embodiments, the first material layer 111 has two opposing surfaces, and the coil unit 121 is fixed to one surface of the first material layer 111.

[0031] In some embodiments, the absorption rate of the second material layer 112 for the target ray is less than that of the first material layer 111. The target ray refers to the ray used for imaging a human body or a portion of the frequency band of that ray's spectrum. In some embodiments, the target ray can be gamma rays, X-rays, etc. Further details regarding the target ray are provided in the following description. Absorption rate is the ratio of the radiant energy absorbed by an object to the total incident energy, and its value ranges from 0 to 1.

[0032] Figure 3 This is an exemplary structural diagram of the first material layer shown according to some embodiments of this specification.

[0033] In some embodiments, see Figure 3 and Figure 6 The first material layer 111 is provided with mounting holes 124. At least one opening of the mounting hole 124 is located on a surface of the first material layer 111 that fixes the coil unit 121. The mounting hole 124 accommodates an auxiliary circuit 122, which is connected to the coil unit 121.

[0034] Mounting hole 124 is a hole for accommodating auxiliary circuit 122. In some embodiments, mounting hole 124 can be a through hole, a through-hole, or a blind hole. For example, mounting hole 124 is a through hole or a through-hole that can penetrate both surfaces of the first material layer 111. As another example, mounting hole 124 is a blind hole that has an opening only on one surface of the first material layer 111 on which the coil unit 121 is fixed.

[0035] The auxiliary circuit 122 is an integrated circuit used to assist the coil unit 121 in transmitting radio frequency signals or receiving magnetic resonance signals. For example, the auxiliary circuit 122 may include a tuning circuit, capacitors, diodes, etc. By setting up the auxiliary circuit 122, the resonant frequency and impedance matching of the coil unit 121 can be adjusted, and the raw signal captured by the coil unit 121 can be preliminarily processed (such as amplified) to prepare for long-distance transmission.

[0036] By fixing the coil unit 121 to one surface of the first material layer 111 and placing the auxiliary circuit 122 in the mounting hole 124, interference to the coil unit 121 during operation of the auxiliary circuit 122 can be reduced, and the relatively delicate auxiliary circuit 122 can be better protected in the mounting hole 124, which helps to ensure the stable operation of the coil device 100. Placing the auxiliary circuit 122 in the mounting hole 124 can also prevent surface protrusions of the coil unit 121 caused by the placement of the auxiliary circuit 122. Furthermore, since the auxiliary circuit 122 is the main heat-generating component during operation, placing it in the mounting hole 124 can reduce the heat transferred from the auxiliary circuit 122 to the coil unit 121 and the object being detected during operation, avoiding the problem of surface overheating of the coil device 100 caused by replacing the existing rigid material with a low-density material.

[0037] In some embodiments, such as Figure 1 and Figure 3 As shown, the wall 110 forms a first cavity 200, and the first material layer 111 includes an inner surface facing the first cavity 200 and an outer surface facing away from the first cavity 200. The coil unit 121 is disposed on the inner surface of the first material layer 111.

[0038] The first cavity 200 can be a cavity used to accommodate a part of the human body. For example, the first cavity 200 can accommodate a human head. The shape of the first cavity 200 can be designed to fit the shape of the human head as closely as possible by designing the shape of the wall 110.

[0039] In some embodiments, multiple coil units 121 may be provided, and the multiple coil units 121 may be connected together by a cable 123. Further description of the cable 123 is provided below.

[0040] In some embodiments of this specification, by providing a coil unit 121 disposed on the inner surface of the first material layer 111, the sensitivity and efficiency of receiving magnetic resonance signals can be improved when scanning the target object because the coil unit 121 is close to the human body. In other embodiments, the coil unit 121 may also be disposed on the outer surface of the first material layer 111 away from the first cavity 200, depending on actual needs.

[0041] In some embodiments, such as Figure 2 and Figure 3 , Figure 6As shown, mounting hole 124 is a through hole or a through-hole, and auxiliary circuit 122 is a circuit assembly board. In some embodiments, a protective shell 120 is provided on the outer surface of the first material layer 111, and the protective shell 120 covers the opening of the through hole or through-hole on the outer surface of the first material layer 111. A circuit assembly board refers to a circuit board that integrates and assembles various electronic components and circuits together. For example, the circuit assembly board can be a printed circuit board (PCB), on which tuning circuits, capacitors, diodes, etc., can be integrated.

[0042] By setting the mounting hole 124 as a through hole or a through-hole, and the auxiliary circuit 122 as a circuit assembly board, the attenuation of the target ray can be further reduced, while working with the coil unit 121 to better process the signal captured by the coil unit 121, preparing for subsequent long-distance transmission. By setting the protective shell 120, the auxiliary circuit 122 can be protected, further ensuring circuit stability.

[0043] In some embodiments, such as Figure 2 As shown, the coil unit 121 is connected to the auxiliary circuit 122 via a cable 123, which is laid on the inner or outer surface of the first material layer 111.

[0044] Cable 123 serves as a signal transmission channel and power supply line connecting the coil unit 121 on the coil device 100 to the radiation system 300. In some embodiments, cable 123 can be a coaxial cable, capable of transmitting high-frequency signals and providing shielding. Cable 123 can originate from various electrical components, run along the surface of the first material layer 111, and eventually converge into one or more bundles, connecting to the radiation system 300 through a first electrical interface and / or a second electrical interface. For details regarding the first electrical interface, the second electrical interface, and the radiation system 300, please refer to the relevant descriptions below.

[0045] In some embodiments, the cable 123 can transmit the drive signal generated by the radiation system 300 to the coil unit 121, or transmit the magnetic resonance signal after preliminary processing by the auxiliary circuit 122 back to the data processing unit of the radiation system 300.

[0046] Figure 4 This is an exemplary structural diagram of the first part according to some embodiments of this specification. Figure 5 This is an exemplary structural diagram of the second part according to some embodiments of this specification.

[0047] In some embodiments, such as Figure 4 , 5As shown, the first cavity 200 is configured to accommodate a human head; the wall 110 includes a first part 150 and a second part 160, wherein when the coil device 100 is worn by a human body, the first part 150 is located on the front side of the coronal plane of the human body, and the second part 160 is located on the back side of the coronal plane of the human body.

[0048] In some embodiments, such as Figure 4 As shown, the first part 150 is located in front of the coronal face of the human body, and encloses the portion of the first cavity 200 surrounding the front of the coronal face of the human body. For example, the first part 150 can enclose the portion of the human head located in front of the coronal face of the human body.

[0049] In some embodiments, such as Figure 5 As shown, the second part 160 is located on the posterior side of the coronal plane of the human body, enclosing the portion of the first cavity 200 that surrounds the posterior side of the coronal plane of the human body. For example, the second part 160 can enclose the portion of the human head located on the posterior side of the coronal plane of the human body. When the second part 160 and the first part 150 are closed, the first cavity 200 is formed.

[0050] In other embodiments of this specification, the first part 150 and the second part 160 may also surround other parts of the human body, as described below.

[0051] In some embodiments, the first part 150 and the second part 160 are detachably connected or hinged. For example, the detachable connection method may include snap-fit, magnetic attraction, threaded lock, slide rail pin, or a combination thereof. As another example, the first part 150 and the second part 160 may be hinged on one side, allowing the first part 150 to open and close relative to the second part 160 in a hinged manner. For example, the hinge method may include shaft-hole hinge, shaft-groove hinge, flexible hinge, film bending, or a combination thereof.

[0052] In some embodiments of this specification, by setting the first part 150 and the second part 160 and connecting them in a detachable or hinged manner, a sufficiently large lateral opening can be formed in the open state, making it easier for the head to be inserted into the first cavity 200 without having to be completely inserted from the top of the head. For subjects who are bandaged after surgery, have impaired consciousness, or have difficulty moving, this can reduce head movement and reduce the difficulty of positioning. The hinged closure method allows the first part 150 and the second part 160 to maintain the same positioning reference after repeated opening and closing, which helps to maintain the consistency of the relative position of the coil unit 121 and reduce sensitivity drift caused by assembly errors.

[0053] The first material layer 111 and the second material layer 112 included in at least a portion of the wall 110 will be described below, taking the first part 150 as an example.

[0054] Figure 6 This is a schematic diagram of the first part of the solution according to some embodiments of this specification. Figure 7 This is a schematic diagram showing the connection between the first material layer and the second material layer according to some embodiments of this specification.

[0055] Figure 7 In the cross-section, the solid line represents the first material layer 111, and the two sides of the solid line represent the second material layer 112 covering both sides of the first material layer 111.

[0056] In some embodiments, such as Figure 6 , 7 As shown, the first material layer 111 can be connected to the second material layer 112 via a support member 113. The support member 113 supports the second material layer 112 and shapes it. The shape of the support member 113 can match the shape of the forehead region 110-1 of the second material layer 112. In some embodiments, the support member 113 can be encapsulated within the first material layer 111 and the second material layer 112 after hot pressing, thus achieving support and installation between the first material layer 111 and the second material layer 112. In other embodiments, support and installation between the first material layer 111 and the second material layer 112 can also be achieved simply by inserting one or more support pillars within the forehead region 110-1 with one or more hollow guide pillars.

[0057] The forehead top region 110-1 refers to the area above the forehead in the coil device 100, such as... Figure 1 As shown in the dashed box. In some embodiments, the forehead top region 110-1 of the wall 110 may be made entirely of rigid plastic in order to increase the connection stability between the first material layer 111 and the second material layer 112 while reducing the absorption of radial rays, which are more important for scanning imaging of the human head. The rigid plastic may be a high-density, high-rigidity polymer such as polycarbonate or polyurethane.

[0058] In some embodiments of this specification, by setting the coil device 100 as a "sandwich structure" comprising a first material layer 111 and second material layers 112 respectively disposed on both sides of the first material layer 111, and by placing the coil unit 121 and the auxiliary circuit 122 on the first material layer 111, on the one hand, it helps to mechanically fix and engage the various parts of the wall 110, and on the other hand, it can effectively reduce the Compton scattering of the target radiation while ensuring the stable function of the coil device 100 and the safety and comfort of the object being detected.

[0059] In some embodiments, the first material layer 111 is made of a high-density rigid material to provide sufficient mechanical strength and electromagnetic properties. However, in the environment of a PET-MR device, the high-density material can significantly attenuate target rays (such as PET gamma rays, 511 keV), reduce imaging sensitivity, and may generate noise due to positron absorption, affecting image quality. Therefore, it is necessary to set some window areas 130 to reduce the attenuation effect of the wall 110 on the target rays.

[0060] In some embodiments, such as Figure 6 As shown, the first material layer 111 has two or more first window areas 131, and the second material layer 112 has one or more second window areas 132.

[0061] The first window area 131 refers to the window area on the first material layer 111.

[0062] The second window area 132 refers to the window area on the second material layer 112.

[0063] In some embodiments, one or more second window areas 132 correspond one-to-one with a portion of two or more first window areas 131, thereby forming a window area 130 of the wall 110 (see Figure 4 By providing more first window areas 131 in the first material layer 111, which has a higher absorptivity, more target rays can pass through the first window areas 131 and bypass the first material layer 111, effectively reducing the attenuation of the target rays by the first material layer 111. The second material layer 112 causes weaker attenuation of the target rays, and only has second window areas 132 in the window area 130 of the wall 110, giving the coil device 100 a better product appearance.

[0064] The window area 130 can be ergonomically designed; for example, at least part of the opening in the window area 130 can expose the eyes, nose, and mouth. Simultaneously, the window area 130 can also reduce the attenuation of the target radiation. In some embodiments, such as... Figure 4 As shown, the first part 150 has window areas 130 corresponding to the eyes, nose and mouth respectively.

[0065] In some embodiments of this specification, by setting two or more first window areas 131 and one or more second window areas 132 to form the window area 130 of the wall 110, the weight of the coil device 100 can be reduced, cable channels can be reserved, electromagnetic field distribution can be optimized, and the influence of electrical signal coupling can be reduced.

[0066] In some embodiments, the material density of the first material layer 111 is greater than the material density of the second material layer 112. This arrangement can reduce Compton scattering of the target rays while enhancing the fixation relationship between the various parts of the wall 110.

[0067] In some embodiments, the coil device 100 further includes a preamplifier (not shown). The preamplifier is used to perform preliminary processing (e.g., amplification) on the raw signal (such as a magnetic resonance signal) received by the coil unit 121. In some embodiments, the preamplifier may be disposed between the forehead region of the first material layer 111 and the second material layer 112. In other embodiments, the coil device 100 may not include a preamplifier, and the preamplifier may be integrated into the scanning bed 330 (see [link to documentation]). Figure 11 , 12 The internal structure further reduces the weight of the coil device 100.

[0068] Similar to the first part 150, the second part 160 also has a first material layer and a second material layer. The first material layer is provided with coil unit 121, auxiliary circuit 122 and cable 123, etc. The configuration of the second part 160 is similar to that of the first part 150, and will not be described again here.

[0069] In some embodiments, the first part 150 has a first electrical interface and the second part 160 has a second electrical interface; when the first part 150 and the second part 160 are closed, the first electrical interface and the second electrical interface are electrically connected.

[0070] The first electrical interface and the second electrical interface (not shown in the figure) are interfaces that electrically connect the circuits (such as coil unit 121, auxiliary circuit 122, etc.) of the first part 150 and the second part 160. In some embodiments, the first electrical interface and the second electrical interface can be composite interfaces that have both signal transmission and power supply functions.

[0071] The first electrical interface can be located on the opposite end faces of the first part 150 and the second part 160.

[0072] The first electrical interface, in conjunction with the second electrical interface, provides drive signals to the first unit 150 and transmits the signals received by the first unit 150 to the signal transmission channel of the second unit 160.

[0073] The second electrical interface can be located on the end face of the second part 160 opposite to the first part 150, mirroring the first electrical interface. In some embodiments, the second part 160 may also be provided with a third electrical interface to connect with the electrical interface on the scanning bed 330, to provide power and drive signals to the coil device 100, and to output the pre-processed magnetic resonance signals collected by the coil device.

[0074] In some embodiments, the connection method between the first electrical interface and the second electrical interface may include board-to-board insertion, spring clip crimping, magnetic docking, or a combination thereof. For example, the connection between the first electrical interface and the second electrical interface may be a board-to-board connection method in which the guide pin and guide sleeve are positioned first, the shielding frame contacts first, and then multiple sets of terminals are inserted simultaneously. As another example, magnetically attracted magnets can be arranged at corresponding positions around the first and second electrical interfaces. When the first part 150 and the second part 160 approach each other, the magnetic force of the magnets is used for pre-positioning, and then the first and second electrical interfaces are guided to precisely dock and achieve electrical connection under the action of the magnetic force. The first electrical interface and the second electrical interface may also have other connection methods, as long as the signal and power conduction are completed simultaneously when the first part 150 and the second part 160 are closed.

[0075] In some embodiments of this specification, when the first part 150 and the second part 160 are closed, the radio frequency, tuning circuit, and power supply channels are simultaneously connected through the electrical connection between the first and second electrical interfaces, eliminating the need for additional cable adapters. This reduces insertion and removal steps and lowers contact loss during the scan preparation phase. The interfaces are concealed inside the closed surface, reducing the probability of external impacts or liquid contamination, which helps maintain signal stability and extend service life.

[0076] Figure 8 This is a schematic diagram of the second part of the solution according to some embodiments of this specification. Figure 9 This is an exemplary structural diagram of a portion of the second material layer of the second part, as shown in some embodiments of this specification.

[0077] In some embodiments, the first material layer 111 of the second portion 160 is bonded to the second material layer 112 of the second portion 160 near the first cavity 200 (not shown in the figures). In some embodiments, a second cavity (not shown) is formed inside the second material layer 112 of the second portion 160 away from the first cavity 200. For example, Figure 8 , 9 As shown, the second material layer 112 of the second part 160, which is away from the first cavity 200, includes a first sub-layer 1122-1 that is attached to the first material layer 111 of the second part 160 and a second sub-layer 1122-2 that abuts against the scanning bed 330. After the two are connected, a second cavity is formed inside. The second cavity can have a certain elastic deformation to better adapt to the physiological characteristics of different detection objects and improve the physical comfort of the detection objects.

[0078] In some embodiments, the first sublayer 1122-1 and the second sublayer 1122-2 may be connected by connectors (e.g., connecting frames, bolts, clips, etc.). In some embodiments, the second sublayer 1122-2 may be made of ethylene-vinyl acetate copolymer (EVA) material.

[0079] In some embodiments, the second material layer 112 of the second portion 160, which is located away from the first cavity 200, has a connection with the scanning bed 330 (see [link]). Figure 11 , Figure 12 The mating plane ensures that the coil assembly 100 can be placed stably on the scanning bed 330. This is just an example. Figure 9 As shown, the second sub-layer 1122-2 of the second material layer 112, which is away from the first cavity 200, has a flat bottom surface 161.

[0080] The scanning bed 330 refers to the bed that carries the object being inspected when the head of the object being inspected is examined by the coil device 100. In some embodiments, a limiting member (not shown in the figure) may be provided on the second sub-layer 1122-2 of the scanning bed 330 and / or the second part 160 away from the first cavity 200 (e.g., the periphery of the bottom surface 161). The limiting member is used to limit the coil device 100 to prevent the coil device 100 from translating relative to the scanning bed 330 and to avoid motion artifacts in the imaging.

[0081] In some embodiments of this specification, by attaching the first material layer 111 of the second part 160 to the second material layer 112 of the second part 160 near the first cavity 200, a buffering effect can be provided and the comfort of the object being inspected can be improved. By forming a second cavity inside the second material layer 112 of the second part 160 away from the first cavity 200, a certain deformation space can be formed between the coil device 100 and the scanning bed 330, improving the comfort of the object being inspected. By providing a plane that mates with the scanning bed 330 in the second material layer 112 of the second part 160 away from the first cavity 200, the stability of the coil device 100 can be ensured.

[0082] Some embodiments of this specification also provide a coil device. For example... Figure 2-6As shown, the coil device 100 includes: a first part 150, serving as the upper half of the coil device 100; and a second part 160, serving as the lower half of the coil device 100. The first part 150 and the second part 160 cooperate to form a first cavity 200. At least one of the first part 150 and the second part 160 includes: a coil unit 121; a first material layer 111 having two opposing surfaces, the coil unit 121 being fixed to one surface of the first material layer 111; the first material layer 111 being provided with a mounting hole 124, at least one opening of the mounting hole 124 being located on one surface of the first material layer 111 where the coil unit 121 is fixed, and the mounting hole 124 accommodating an auxiliary circuit 122, the auxiliary circuit 122 being connected to the coil unit 121. The first part 150 and the second part 160 together form the first cavity 200, which means that the first part 150 encloses a part of the human body located on the front side of the coronal plane, and the second part 160 encloses a part of the human body located on the back side of the coronal plane corresponding to the first part 150. When the first part 150 and the second part 160 are closed, the first cavity 200 can be formed.

[0083] For details regarding Part 150, Part 160, First Cavity 200, Coil Unit 121, First Material Layer 111, Mounting Hole 124, and Auxiliary Circuit 122, please refer to the preceding text.

[0084] The coil devices provided in some embodiments of this specification can be used in multimodal imaging systems. A description of multimodal imaging systems is provided below. Figure 11 , 12 And related explanations.

[0085] In some embodiments of this specification, the coil device 100 for a multimodal imaging system, which includes a first part 150, a second part 160, a coil unit 121 and a first material layer 111, is divided into a first part 150 and a second part 160. This arrangement facilitates the maintenance and repair of the device and enables the coil device 100 to be applied to imaging systems that include different imaging devices.

[0086] In some embodiments, the first material layer 111 is a non-metallic material with a density greater than 0.8 g / cm³, and one surface of the first material layer 111 fixing the coil unit 121 is covered with a low-density material with a density not greater than 0.8 g / cm³. For example, the non-metallic material with a density greater than 0.8 g / cm³ can be a high-density, high-rigidity material such as polycarbonate or polyurethane with a density greater than 0.8 g / cm³. In some embodiments, the density of the first material layer 111 can be between 0.85 and 1.2 g / cm³, for example, 0.9 g / cm³, 0.95 g / cm³, 1.0 g / cm³, etc. The low-density material can be polypropylene, polyurethane, polyethylene, etc., with a density not greater than 0.8 g / cm³. By setting the first material layer 111 to be a high-density non-metallic material and covering its surface with a low-density material, the coil unit 121 and other components within the first material layer 111 can be protected while ensuring the shape stability of the first material layer 111, and the comfort of the object being tested can be improved.

[0087] In some embodiments, the first material layer 111 includes an inner surface facing the first cavity 200 and an outer surface facing away from the first cavity 200. The coil unit 121 is disposed on the inner surface of the first material layer 111. The mounting hole 124 is a through hole or a through-hole, and the auxiliary circuit 122 is a circuit assembly board. A protective shell 120 is disposed on the outer surface of the first material layer 111, covering the opening of the through hole or the through-hole on the outer surface. By setting the coil unit 121 on the inner surface, setting the mounting hole 124 as a through hole or a through-hole, and setting the protective shell 120 to cover the opening of the through hole or the through-hole on the outer surface, better protection can be provided for the coil unit 121 and the auxiliary circuit 122, enabling the coil device 100 to operate more stably.

[0088] In some embodiments, the first cavity 200 can accommodate the patient's head, knee joint, or ankle. In this case, the first portion 150 and the second portion 160 can be configured to match the shape of the outer surface of the head, knee joint, or ankle, improving the comfort of the patient. By enabling the first cavity 200 to accommodate the patient's head, knee joint, or ankle, the application scenarios of the coil device 100 are expanded.

[0089] Some embodiments of this specification also provide another coil device that can be used in a multimodal imaging system. In some embodiments, the coil device 100 includes: a coil unit 121; a first material layer 111 having two opposing surfaces, the coil unit 121 being fixed to one surface of the first material layer 111; the first material layer 111 being provided with a mounting hole 124, at least one opening of the mounting hole 124 being located on the surface of the first material layer 111 where the coil unit 121 is fixed, the mounting hole 124 accommodating an auxiliary circuit 122 connected to the coil unit 121; a second material layer 112, the second material layer 112 at least covering a portion of the surface of the first material layer 111 where the coil unit 121 is fixed; the second material layer 112 having a lower density and a lower attenuation rate for the target ray compared to the first material layer 111. For a multimodal imaging system, the target ray can be gamma rays, X-rays generated by a linear accelerator, proton beams, electron beams generated by a linear accelerator, etc. For details regarding coil unit 121, first material layer 111, mounting hole 124, auxiliary circuit 122, and second material layer 112, please refer to the preceding text.

[0090] In some embodiments of this specification, by configuring a coil device 100 for a multimodal imaging system, including a coil unit 121, a first material layer 111, and a second material layer 112, the second material layer 112 has a lower density, which better protects the coil unit 121. This, combined with the auxiliary circuit 122, maintains circuit stability, and the second material layer 112 has a lower attenuation rate for the target radiation, contributing to better imaging results. Furthermore, this configuration allows the coil device 100 to be applied to imaging systems that include different imaging devices.

[0091] In some embodiments, the first material layer 111 is formed to conform to the organ contour of the object being detected. The organ contour is at least one of the head contour, knee joint contour, shoulder joint contour, back contour, and ankle contour. At least a portion of both surfaces of the first material layer 111 is covered by a second material layer 112. The second material layer 112 is a low-density material with a density not greater than 0.8 g / cm³. By forming the first material layer 111 to conform to the organ contour of the object being detected and by covering at least a portion of both surfaces with a second material layer 112 made of a low-density material, the application range of the coil device 100 can be expanded to accommodate different parts of different objects being detected, and the comfort and experience of the object being detected can be improved.

[0092] In some embodiments, both the first material layer 111 and the second material layer 112 are provided with multiple window areas 130. For example, both the first material layer 111 and the second material layer 112 may be provided with multiple window areas 130 at corresponding positions to form windows connecting the first cavity 200 and the outside of the coil device 100 in certain areas as needed. Alternatively, the positions of the window areas of the first material layer 111 and the second material layer 112 may not be completely corresponding; they can be set according to actual needs. More information on the setting of the window areas 130 can be found in [reference needed]. Figure 4 As explained above. Figure 1 and Figure 4 As shown, by reasonably setting the window area 130, the object being detected can observe the scene outside the first cavity 200, while attenuating the target rays.

[0093] Figure 10 This is a schematic diagram of the hollowed-out area shown in some embodiments of this specification.

[0094] In some embodiments, the coil unit 121 includes a plurality of coil units, and each coil unit 121 forms a loop (see [link]). Figure 3 ).like Figure 10 As shown, the first material layer 111 is in the loop (not in Figure 10 A hollow area 114 is provided within the area enclosed by the first material layer 111 loop, and the second material layer 112 covers the hollow area 114. By providing a hollow area 114 within the area enclosed by the first material layer 111 loop and covering the hollow area 114 with the second material layer 112, the coil device 100 can stably fix the coil unit 121, which helps to further reduce the attenuation of the target ray while ensuring the comfort and support of the object being detected.

[0095] Figure 11 This is a schematic diagram illustrating the application scenario of the coil device within an aperture according to some embodiments of this specification. Figure 12 This is a schematic diagram illustrating the application scenario of the coil device outside the aperture according to some embodiments of this specification.

[0096] Radiation system 300 refers to a system that performs scanning operations on a target object. In some embodiments, such as Figure 11 , 12 As shown, the radiation system 300 includes an annular aperture 310, a scanning device 320, and a scanning bed 330.

[0097] The aperture 310 is the space used to accommodate the object being detected during the scanning process.

[0098] The scanning device 320 is a device for transmitting target rays to perform scanning imaging. For example, the scanning device may include imaging devices such as positron emission tomography (PET-MR) devices, magnetic resonance imaging (MR) devices, positron emission tomography (PET) devices, positron emission tomography (PET-CT) devices, X-ray imaging devices (XR devices), computed tomography (CT) devices, and single-photon emission computed tomography (SPECT) devices. In some embodiments, when the scanning device 320 is a PET-MR device, the radiation system 300 is a PET-MR system; when the scanning device 320 includes one or more of MR devices, PET devices, PET-CT devices, XR devices, CT devices, or SPECT devices, the radiation system 300 is a multimodal imaging system.

[0099] In some embodiments, such as Figure 11 , 12 As shown, during a head scan, the subject wears a coil device 100 on their head and lies on the scanning bed 330 in a fixed position. The radiation system 300 moves the scanning bed 330, which is located outside the aperture, to a specific position within the aperture 310, and then controls the scanning device 320 to radiate target rays to examine the subject. After the examination is completed, the radiation system 300 controls the scanning device 320 to stop radiating target rays and moves the scanning bed 330 out of the aperture 310. The subject or medical personnel then remove the coil device 100.

[0100] Some embodiments in this specification have the following beneficial effects: (1) The “sandwich” structure is designed to ensure structural stability. It not only uses low-density, low-dielectric windows in the key imaging area to significantly reduce the radial attenuation of the target rays and improve the count rate and image signal-to-noise ratio, but also allows for independent disassembly and assembly of different components to meet the needs of rapid maintenance and upgrades and reduce hospital downtime maintenance costs. (2) By setting the first material layer and the second material layer together, the interlocking strength is maintained and the overall weight is reduced, while the comfort of the patient being examined is improved. (3) The coil unit and capacitor can be embedded in the first material layer and a mounting slot or mounting through hole is provided to ensure the uniformity of PET reconstruction. (4) The top is reserved for the preamplifier compartment, instead of being set on the front or back of the patient for signal reception as in the traditional structure, which can effectively reduce the attenuation of the target rays. (5) The first part and the second part are detachably connected or hinged, and the first electrical interface and the second electrical interface are respectively set. When the first part and the second part are closed, power can be supplied and signal transmission can be realized, which can be conveniently opened and closed, shorten the preparation time before scanning, and reduce the risk of motion artifacts.

[0101] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

[0102] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this specification are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0103] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A coil device (100) for a PET-MR system, characterized in that, Includes a coil unit (121) and a wall (110) for fixing the coil unit (121). At least a portion of the wall (110) includes a first material layer (111) and a second material layer (112) disposed on both sides of the first material layer (111); the second material layer (112) has a lower absorption rate of the target radiation than the first material layer (111). The first material layer (111) has two opposing surfaces, and the coil unit (121) is fixed to one surface of the first material layer (111); The first material layer (111) is provided with mounting holes (124), at least one opening of the mounting holes (124) is located on the surface of the first material layer (111) that fixes the coil unit (121), and the mounting holes (124) accommodate an auxiliary circuit (122), which is connected to the coil unit (121).

2. The coil device (100) according to claim 1, characterized in that, The first material layer (111) has two or more first window areas (131), and the second material layer (112) has one or more second window areas (132). The one or more second window areas (132) correspond one-to-one with a portion of the two or more first window areas (131), thereby forming the window area (130) of the wall (110).

3. The coil device (100) according to claim 1, characterized in that, The wall (110) forms a first cavity (200), the first material layer (111) includes an inner surface facing the first cavity (200) and an outer surface facing away from the first cavity (200), and the coil unit (121) is disposed on the inner surface.

4. The coil device (100) according to claim 3, characterized in that, The mounting hole (124) is a through hole or a through hole, and the auxiliary circuit (122) is a circuit assembly board; a protective shell (120) is provided on the outer surface of the first material layer (111), and the protective shell (120) covers the opening of the through hole or through hole on the outer surface of the first material layer (111).

5. The coil device (100) according to claim 4, characterized in that, The coil unit (121) and the auxiliary circuit (122) are connected by a cable (123); The cable (123) is laid on the inner or outer surface of the first material layer (111).

6. The coil device (100) according to claim 3, characterized in that, The first cavity (200) is configured to accommodate a human head; The wall (110) includes a first part (150) and a second part (160). When the coil device (100) is worn by a human body, the first part (150) is located on the front side of the coronal plane of the human body, and the second part (160) is located on the back side of the coronal plane of the human body. The first part (150) and the second part (160) are detachably connected or hinged.

7. The coil device (100) according to claim 6, characterized in that, The first part (150) has window areas (130) respectively corresponding to the eyes, nose and mouth; The first material layer (111) of the second part (160) is attached to the second material layer (112) of the second part (160) near the first cavity (200); A second cavity is formed inside the second material layer (112) of the second part (160) which is away from the first cavity (200); The second material layer (112) of the second part (160) away from the first cavity (200) has a plane that mates with the scanning bed (330).

8. The coil device (100) according to claim 6, characterized in that, The first part (150) has a first electrical interface, and the second part (160) has a second electrical interface; when the first part (150) and the second part (160) are closed, the first electrical interface and the second electrical interface are electrically connected.

9. A coil device (100) for a multimodal imaging system, characterized in that, include: The first part (150) serves as the upper half of the coil device (100); The second part (160) serves as the lower half of the coil device (100), and the first part (150) and the second part (160) cooperate to form a first cavity (200). At least one of the first part (150) and the second part (160) includes: Coil unit (121); The first material layer (111) has two opposing surfaces, and the coil unit (121) is fixed to one surface of the first material layer (111); The first material layer (111) is provided with mounting holes (124), at least one opening of the mounting holes (124) is located on the surface of the first material layer (111) that fixes the coil unit (121), and the mounting holes (124) accommodate an auxiliary circuit (122), which is connected to the coil unit (121).

10. The coil device (100) according to claim 9, characterized in that, The first material layer (111) is a non-metallic material with a density greater than 0.8 g / cm³. The first material layer (111) covers one surface of the coil unit (121) with a low-density material, the density of which is not greater than 0.8 g / cm³.

11. The coil device (100) according to claim 10, characterized in that, The first material layer (111) includes an inner surface facing the first cavity (200) and an outer surface facing away from the first cavity (200), and the coil unit (121) is disposed on the inner surface of the first material layer (111); The mounting hole (124) is a through hole or a through-hole, and the auxiliary circuit (122) is a circuit assembly board; A protective shell (120) is provided on the outer surface of the first material layer (111), and the protective shell (120) covers the opening of the through hole or through hole on the outer surface.

12. The coil device (100) according to claim 9, characterized in that, The first cavity (200) is capable of accommodating the patient's head, knees, or ankles.

13. A coil device (100) for a multimodal imaging system, characterized in that, include: Coil unit (121); The first material layer (111) has two opposing surfaces, and the coil unit (121) is fixed to one surface of the first material layer (111). The first material layer (111) is provided with mounting holes (124), at least one opening of the mounting holes (124) is located on the surface of the first material layer (111) that fixes the coil unit (121), and the mounting holes (124) accommodate an auxiliary circuit (122), which is connected to the coil unit (121). A second material layer (112) covers at least a portion of the surface on which the first material layer (111) fixes the coil unit (121); The second material layer (112) has a lower density and a lower attenuation rate for the target ray compared to the first material layer (111).

14. The coil device (100) according to claim 13, characterized in that, The first material layer (111) forms an organ contour that conforms to the object being tested. The organ contour is at least one of the head contour, knee joint contour, shoulder joint contour, back contour, and ankle contour. Both surfaces of the first material layer (111) are covered with at least a portion of the second material layer (112). The second material layer (112) is a low-density material with a density not greater than 0.8 g / cm³.

15. The coil device (100) according to claim 14, characterized in that, Both the second material layer (112) and the first material layer (111) are provided with multiple window areas (130).

16. The coil device (100) according to claim 13, characterized in that, The coil unit (121) includes a plurality of coil units, and each coil unit (121) forms a loop; The first material layer (111) has a hollow area (114) within the area enclosed by the loop. The second material layer (112) covers the hollow area (114).

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