CN112946633B

CN112946633B - Radar sensor, magnetic resonance imaging apparatus, and magnetic resonance imaging system

Info

Publication number: CN112946633B
Application number: CN202110126237.4A
Authority: CN
Inventors: 邵凯
Original assignee: Shanghai United Imaging Healthcare Co Ltd
Current assignee: Shanghai United Imaging Healthcare Co Ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2023-03-10
Anticipated expiration: 2041-01-29
Also published as: CN112946633A

Abstract

The radar sensor provided by the invention comprises a shell and a detecting body, wherein the detecting body is arranged inside the shell, the shell comprises a lower base shell, and the lower base shell is provided with a windowing area for signal transmission; the probe body comprises a substrate and an antenna assembly, wherein the antenna assembly is arranged on the substrate and transmits and receives signals through the windowing area. Furthermore, the magnetic resonance imaging device provided by the invention comprises a scanning barrel and the radar sensor, wherein the scanning barrel is provided with a scanning hole for loading a preset object; the substrates of the at least two radar sensors are arranged at an angle with the axis of the scanning hole, and the substrates of the at least two radar sensors are inclined towards each other along the axial direction of the scanning hole. The radar sensor is arranged on the scanning cylinder, so that the magnetic resonance examination mode of the preset object can be simplified; the at least two substrates are arranged to incline oppositely, so that the antenna assembly of the radar sensor has a wide enough scanning range for a preset object, and can scan a preset part more accurately, thereby correcting a motion artifact generated by imaging when a physiological motion signal is acquired.

Description

Radar sensor, magnetic resonance imaging apparatus, and magnetic resonance imaging system

Technical Field

The invention relates to the technical field of medical instruments, in particular to a radar sensor, magnetic resonance imaging equipment and a magnetic resonance imaging system.

Background

The existing radar sensor is usually arranged on a medical scanning garment, and a patient wears the scanning garment to perform magnetic resonance examination, so that physiological motion information is acquired. The magnetic resonance examination mode is complicated, the scanning range of the radar sensor is small, and motion artifacts are easily generated in imaging when the radar sensor scans the abdomen of a patient.

Disclosure of Invention

The invention aims to provide a radar sensor, a magnetic resonance imaging device and a magnetic resonance imaging system, and aims to solve the problems that the existing magnetic resonance examination mode is complicated, the scanning range is small, and motion artifacts are generated in imaging.

In order to solve the above technical problem, according to an aspect of the present invention, there is provided a radar sensor, including a housing and a probe, wherein the probe is disposed inside the housing;

the shell comprises a lower base shell, and the lower base shell is provided with a windowing area for signal transmission;

the probe body comprises a substrate and an antenna assembly, wherein the antenna assembly is arranged on the substrate and transmits and receives signals through the windowing area.

Optionally, the antenna assembly is disposed on a surface of the substrate facing the window area, and the antenna assembly is within the window area.

Optionally, the housing further comprises an upper base shell, and the upper base shell is step-shaped.

Optionally, the radar sensor further comprises a plurality of mounting brackets provided on the housing, the radar sensor being adapted to be mounted on a scanning drum via the mounting brackets, the mounting brackets being arranged at an angle to the base plate.

Optionally, the radar sensor further includes a first shielding layer disposed on the outer wall of the housing.

Optionally, the windowing region comprises a through hole penetrating through the lower base shell.

Optionally, the windowing region includes at least two of the through holes, and the at least two of the through holes are arranged in an array.

Optionally, the radar sensor further includes a first shielding layer and a second shielding layer, the first shielding layer is disposed on the outer wall of the housing, the second shielding layer is disposed on the inner wall of the through hole, and the first shielding layer and the second shielding layer are electrically connected.

Optionally, the probe further includes a shielding frame, the shielding frame is disposed on a surface of the substrate where the antenna assembly is disposed, and the antenna assembly is within a range of the shielding frame.

Optionally, the shielding frame extends in a direction perpendicular to the substrate and is accommodated in the through hole, and a gap is formed between the outer periphery of the shielding frame and the second shielding layer.

Optionally, the probe further includes a main chip and a shielding case, the main chip is disposed on a surface of the substrate where the antenna assembly is disposed, the main chip is connected to the antenna assembly, and the main chip is outside the range of the windowing region; the shielding case is used for covering the main chip.

According to another aspect of the present invention, the present invention further provides a magnetic resonance imaging apparatus, which includes a scanning barrel having a scanning hole for loading a predetermined object, and a radar sensor as described above for scanning the predetermined object; at least two radar sensors are arranged on the scanning cylinder at intervals along the axial direction of the scanning hole, and the at least two radar sensors are arranged in a collinear mode.

Optionally, the base plates of at least two radar sensors are arranged at an angle to the axis of the scanning hole, and the base plates of at least two radar sensors are inclined towards each other along the axial direction of the scanning hole.

Optionally, the scanning cylinder has a mounting groove corresponding to the radar sensor, the mounting groove is used for accommodating the radar sensor, and the mounting groove is recessed in the outer wall of the scanning cylinder along the radial direction of the scanning hole.

Based on a further aspect of the invention, the invention also provides a magnetic resonance imaging system comprising the magnetic resonance imaging device as described above.

In summary, the radar sensor provided by the present invention includes a housing and a detecting body, wherein the detecting body is disposed inside the housing, the housing includes a lower base shell, and the lower base shell is provided with a windowing region for signal transmission; the probe body comprises a substrate and an antenna assembly, wherein the antenna assembly is arranged on the substrate and transmits and receives signals through the windowing area. Further, the invention provides a magnetic resonance imaging apparatus comprising a scanning barrel and a radar sensor as described above, wherein the scanning barrel has a scanning hole for loading a predetermined object; the at least two radar sensors are arranged on the scanning cylinder at intervals along the axial direction of the scanning hole, and the at least two radar sensors are arranged in a collinear manner; the base plates of at least two radar sensors are arranged at an angle with the axis of the scanning hole, and the base plates of at least two radar sensors are inclined towards each other along the axial direction of the scanning hole. By mounting the radar sensor on the scanning cylinder, the mode of magnetic resonance examination of the preset object can be simplified; by arranging at least two substrates to incline oppositely, the antenna assembly of the radar sensor can scan a preset object in a wide range, and can scan a preset part more accurately, so that motion artifacts generated by imaging when physiological motion signals are collected are corrected.

Drawings

It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the invention and do not constitute any limitation to the scope of the invention. Wherein:

fig. 1 to 4 are exploded views of a radar sensor according to a first embodiment of the present invention;

fig. 5 to 6 are schematic views of a radar sensor according to a first embodiment of the present invention;

FIGS. 7-9 are schematic views of a probe according to a first embodiment of the present invention;

FIGS. 10-11 are schematic views of an upper base shell according to a first embodiment of the present invention;

FIG. 12 is a schematic view of a mounting bracket on the housing according to a first embodiment of the invention;

fig. 13 is a schematic view of a radar sensor according to a first embodiment of the present invention when mounted;

FIG. 14 is a schematic view of a lower base shell of a first embodiment of the present invention;

FIGS. 15 to 16 are schematic views showing a probe body according to a first embodiment of the present invention mounted on a lower base case;

fig. 17 to fig. 20 are schematic diagrams illustrating a first shielding layer disposed on a housing according to a first embodiment of the present invention;

fig. 21 is a schematic view of a second shielding layer disposed on an inner wall of a through hole according to a first embodiment of the invention;

FIG. 22 is a schematic diagram of a second shielding layer and a shielding frame according to a first embodiment of the present invention;

figure 23 is a diagrammatic view of a magnetic resonance imaging apparatus in accordance with a first embodiment of the invention;

FIG. 24 is an enlarged view of portion A of FIG. 23;

fig. 25 is a front view of a magnetic resonance imaging apparatus according to a first embodiment of the present invention;

figure 26 is a diagrammatic illustration of a magnetic resonance imaging apparatus in accordance with a first embodiment of the invention in operation;

fig. 27 to 32 are schematic views of the windowing region according to the second embodiment of the present invention.

In the drawings:

100-a radar sensor; 110-a housing; 111-lower base shell; 1110 — a windowing region; 112-upper base shell; 1120-step surface; 120-a probe; 121-a substrate; 122-an antenna assembly; 123-a shielding frame; 124-main chip; 125-a shield; 130-a mounting bracket; 141-upper shielding base layer; 142-a lower shielding base layer; 150-a second shielding layer;

200-a scanning cylinder; 210-scanning the aperture; 220-mounting grooves; 300-a predetermined object; 400-examining bed; α -a predetermined tilt angle; beta-scan coverage angle.

Detailed Description

To further clarify the objects, advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be noted that the drawings are in greatly simplified form and are not to scale, but are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this application, the singular forms "a", "an" and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a" and "an" are generally employed in a sense including "at least one," the terms "at least two" are generally employed in a sense including "two or more," and the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, features defined as "first," "second," and "third" may explicitly or implicitly include one or at least two of the features unless the content clearly dictates otherwise.

The invention provides a radar sensor, a magnetic resonance imaging device and a magnetic resonance imaging system, and aims to solve the problems that an existing magnetic resonance examination mode is complicated, the scanning range is small, and motion artifacts are generated in imaging.

[ EXAMPLES one ]

The present embodiment is described with reference to fig. 1 to 26.

As shown in fig. 1 to 4, fig. 1 to 4 are exploded views of a radar sensor according to a first embodiment of the present invention, and the present embodiment provides a radar sensor 100, which includes a housing 110 and a probe 120, wherein the probe 120 is disposed inside the housing 110; the housing 110 includes a lower base shell 111, the lower base shell 111 is provided with a windowing region 1110 for signal transmission; with continuing reference to fig. 1 and with combined reference to fig. 7, fig. 7 is a schematic diagram of a probe in accordance with a first embodiment of the present invention, in which the probe 120 includes a substrate 121 and an antenna element 122, and the antenna element 122 is disposed on the substrate 121 and transmits and receives signals (antenna signals) through the windowed area 1110. In an exemplary embodiment, the substrate 121 is a PCB.

Further, with continued reference to fig. 1 and fig. 3, the antenna element 122 is disposed on a side of the substrate 121 facing the windowed area 1110, and the antenna element 122 is within the range of the windowed area 1110, specifically, the transmission route of the antenna element 122 for transmitting and receiving signals is within the range of the windowed area 1110, so that the antenna element 122 can normally transmit and receive signals.

Further, the housing 110 further includes an upper base case 112, as shown in fig. 5 and 6, fig. 5 to 6 are schematic views of the radar sensor 1 according to the first embodiment of the present invention, and the upper base case 112 and the lower base case 111 are assembled with each other to form the housing 110. Specifically, the upper base case 112, the substrate 121 of the probe 120, and the lower base case 111 are fastened and connected in sequence by screws, as shown in fig. 15 and 16, fig. 15 to 16 are schematic diagrams illustrating the probe of the first embodiment of the present invention being assembled on the lower base case 111, and in this embodiment, after the substrate 121 and the lower base case 111 are assembled together, the upper base case 112 is assembled, that is, the substrate 121 is disposed on the lower base case 111. Of course, the substrate 121 may also be disposed on the upper base casing 112, or at least two portions of the substrate 121 may be disposed on the upper base casing 112 and the lower base casing 111, respectively.

Preferably, with continuing reference to fig. 6 in conjunction with fig. 10 and 11, fig. 10 and 11 are schematic views of an upper base shell of a first embodiment of the present invention, the upper base shell 112 being stepped. Referring to fig. 13, fig. 13 is a schematic view illustrating a radar sensor according to a first embodiment of the present invention, in which a housing 110 of a radar sensor 100 is obliquely accommodated in a cavity (specifically, a mounting groove 220) and an upper base shell 112 is stepped to reduce a space occupied by the housing 110. It can be understood that the upper base casing 112 includes a plurality of step surfaces 1120 connected in sequence, and the adjacent two step surfaces 1120 include, but are not limited to, being parallel, for example, the adjacent two step surfaces 1120 can also be inclined, and referring to fig. 11, the step surface 1120 on one side (the rightmost side in fig. 11) of the upper base casing 112 is connected with the previous step surface 1120 in an inclined manner, so that the space occupied by the casing 110 is less. In addition, the step surface 1120 of the present embodiment includes, but is not limited to, a plane shape, a curved surface (such as a spherical surface), and an arc shape. Thus, stepped is understood herein to mean that the upper base shell 112 is substantially stepped.

In some embodiments, the plurality of arc-shaped step surfaces 1120 are connected in sequence, two adjacent step surfaces 1120 are transited by an arc segment, and the upper base shell 112 is substantially arc-shaped. As such, the structure in which the thickness of the housing 110 (the length in the direction from the upper base case 112 to the lower base case 111) is gradually reduced in the direction opposite to the extension direction of the substrate 121 (here, the rightward direction in fig. 11 can be referred to) can be understood as the upper base case 112 having a step shape in the present embodiment.

Further, the radar sensor 100 further includes a plurality of (three are shown in the embodiment) mounting brackets 130 disposed on the housing 110, the radar sensor 100 is configured to be mounted on a scanning drum 200 through the mounting brackets 130, and the mounting brackets 130 are disposed at an angle to the substrate 121. Referring to fig. 12, fig. 12 is a schematic view of a mounting bracket according to an embodiment of the present invention, the mounting bracket 130 is disposed at an angle to the bottom surface of the lower base casing 111, and in the present embodiment, the substrate 121 is parallel to the bottom surface of the lower base casing 111, so the mounting bracket 130 is disposed at an angle to the substrate 121. It should be noted that, in this embodiment, the positional relationship between the bottom surface of the lower base shell 111 and the substrate 121 is not particularly limited, and the two may be parallel or inclined, and this embodiment is sufficient if the mounting bracket 130 and the substrate 121 are in an inclined relationship. In practice, the mounting bracket 130 is disposed on the scan tube 200 in parallel, please refer to fig. 13, so that the antenna assembly 122 on the substrate 121 can be disposed at an angle to the scan tube 200 by the mounting bracket 130. The angled arrangement herein means that the mounting bracket 130 is angled at an acute angle to the substrate 121, and the mounting bracket 130 is angled in comparison to the substrate 121. Preferably, the mounting bracket 130 has a plate shape. It should be noted that, the plurality of mounting brackets 130 may be disposed on the upper base shell 112, or may be disposed on the lower base shell 111, or may be partially disposed on the upper base shell 112, and partially disposed on the lower base shell 111, and those skilled in the art may configure the mounting brackets according to actual situations; as shown in fig. 14, fig. 14 is a schematic view of a lower base shell 111 according to a first embodiment of the present invention, and three mounting brackets 130 of the present embodiment are all disposed on the lower base shell 111.

Preferably, the radar sensor 100 further includes a first shielding layer disposed on an outer wall of the housing 110. In this embodiment, the housing 110 is made of an insulating material (e.g., plastic), the first shielding layer is a metal layer (e.g., copper), and the first shielding layer is disposed on the outer wall of the housing 110 and can replace the housing 110 made of metal, so as to eliminate the eddy current phenomenon in the magnetic resonance system and effectively avoid the electromagnetic interference.

In fact, as shown in fig. 17 to 20, fig. 17 to 20 are schematic views of disposing a first shielding layer on a housing according to a first embodiment of the present invention, the first shielding layer includes an upper shielding base layer 141 and a lower shielding base layer 142, and as shown in fig. 17 and 18, the upper shielding base layer 141 is glued and formed on the outer wall of the upper base shell 112; as shown in fig. 19 and 20, the lower shield base layer 142 is glued to the outer wall of the shaped lower base case 111; after the upper and lower

shielding base layers

141 and 142 are formed, the upper and

lower base cases

112 and 111 are assembled with each other to form the housing 110, and after the assembly, the upper and lower

shielding base layers

141 and 142 are connected in contact with each other.

Further, with continued reference to fig. 14, the windowing region 1110 includes a through-hole that extends through the lower base shell 111. The shape of the through-hole is not particularly limited, and may be, for example, a circular hole, an elliptical hole, or a polygonal hole (e.g., a rectangular hole).

Preferably, the radar sensor 100 further includes a first shielding layer and a second shielding layer 150, the first shielding layer is disposed on an outer wall of the housing 110 (please refer to fig. 21), fig. 21 is a schematic diagram of the second shielding layer disposed on an inner wall of the through hole according to the first embodiment of the present invention, the second shielding layer 150 is disposed on the inner wall of the through hole, and the first shielding layer and the second shielding layer 150 are electrically connected to achieve a conductive shielding effect. Actually, when the lower shield base layer 142 is formed on the outer wall of the lower base shell 111, the lower shield base layer 142 is formed on the inner wall of the through hole along the axial extension of the through hole to form the second shield layer 150, it can be understood that the second shield layer 150 is a part of the lower shield base layer 142.

It should be noted that the first shielding layer and the second shielding layer can be made of conductive flexible material (such as carbon fiber cloth); or spraying conductive paint or plating metal film on the hard or flexible insulating material to form the first shielding layer and the second shielding layer 150; nor to one or more of the above combinations. In an exemplary embodiment, the first and second shielding layers 150 are shielding foils.

Further, referring to fig. 8 and 9, fig. 8 and 9 are schematic diagrams of a probe according to a first embodiment of the present invention, the probe 120 further includes a shielding frame 123, the shielding frame 123 is disposed on a side of the substrate 121 where the antenna assembly 122 is disposed, and the antenna assembly 122 is within a range of the shielding frame 123, that is, the shielding frame 123 encloses the antenna assembly 122. Preferably, referring to fig. 22, fig. 22 is a schematic diagram illustrating a positional relationship between a second shielding layer and a shielding frame 123 according to the first embodiment of the present invention, where the shielding frame 123 extends along a direction perpendicular to the substrate 121 and is accommodated in the through hole, and a gap is formed between an outer periphery of the shielding frame 123 and the second shielding layer to prevent electromagnetic waves in the radar sensor 100 from leaking.

Optionally, the probe 120 further includes a main chip 124 and a shielding cover 125, the main chip 124 is disposed on a side of the substrate 121 where the antenna assembly 122 is disposed, the main chip 124 is connected to the antenna assembly 122, and the main chip 124 is outside the window area 1110; the shield case 125 is used to cover the main chip 124. It should be noted that the shielding frame 123, the shielding cover 125 and the housing 110 provided with the first shielding layer of the present embodiment interact with each other to implement electromagnetic compatibility in the magnetic resonance system. Note that, in practice, the main chip 124 is embedded in the substrate 121, and only the portion of the main chip 124 that is on the same plane as the antenna component 122 is described here, so that the portion of the main chip 124 that is on the same plane as the antenna component 122 is summarized as "the main chip 124 is disposed on the plane of the substrate 121 on which the antenna component 122 is disposed".

Based on the above radar sensor, this embodiment further provides a magnetic resonance imaging apparatus, as shown in fig. 23, fig. 23 is a schematic diagram of a magnetic resonance imaging apparatus according to a first embodiment of the present invention, the magnetic resonance imaging apparatus includes a scan drum 200 and the radar sensor 100 as described above, the scan drum 200 has a scan hole 210 for loading a predetermined object 300, and the radar sensor 100 is used for scanning the predetermined object 300; at least two radar sensors 100 are arranged on the scanning cylinder 200 at intervals along the axial direction of the scanning hole 210, and at least two radar sensors 100 are arranged in a collinear manner, namely, the axis of the scanning hole 210 is arranged. By mounting the radar sensor 100 to the scanning tube 200, the way in which the predetermined object 300 is examined by magnetic resonance can be simplified.

Specifically, referring to fig. 26, fig. 26 is a schematic diagram of a magnetic resonance imaging apparatus according to a first embodiment of the present invention in operation, in which a predetermined object 300 lies on an examination couch 400, the examination couch 400 moves into the scanning bore 210 along an axial direction of the scanning bore 210, and a predetermined portion (for example, an abdomen) of the predetermined object 300 is scanned by at least two radar sensors 100, so as to acquire a physiological motion signal.

Preferably, referring to fig. 24 and 25, fig. 24 is an enlarged view of a portion a in fig. 23, fig. 25 is a front view of a magnetic resonance imaging apparatus according to a first embodiment of the present invention, the substrates 121 of at least two of the radar sensors 100 are arranged at an angle to an axis of the scanning hole 210, and the substrates 121 of at least two of the radar sensors 100 are inclined toward each other along an axial direction of the scanning hole 210. It should be understood that the substrate 121 is disposed at an angle to the axis of the scanning hole 210, which means that the axis of the scanning hole 210 obliquely penetrates through the substrate 121 (the included angle is an acute angle); the two substrates 121 are inclined toward each other. By arranging at least two substrates 121 to incline towards each other, the antenna assembly 122 of the radar sensor 100 can scan a predetermined object 300 in a wide enough range, and can scan a predetermined part more accurately, so that a motion artifact generated by imaging when a physiological motion signal is acquired can be corrected.

Note that, here, an angle formed by the substrate 121 of the radar sensor 100 and the axis of the scanning hole 210 is referred to as a predetermined tilt angle α, and a scanning range of the radar sensor 100 (actually, a coverage range of the antenna assembly 122) is referred to as a scanning coverage angle β. Referring to fig. 25, for example, in order to obtain a wide scanning range, the two radar sensors 100 are adjusted to have a predetermined tilt angle α, so that the scanning ranges of the two radar sensors 100 on the examining table 400 are at least partially overlapped (including the scanning ranges of the two radar sensors are just adjacent to each other). The size of the predetermined tilt angle α can be adjusted by one skilled in the art according to the actual situation and the radial position of the table 400 in the scanning hole 210 (which can be understood as the distance from the table 400 to the central axis of the scanning hole 210 in the radial direction), so as to obtain better imaging of the predetermined portion. Here, the predetermined tilt angle α on the left side of FIG. 25 is referred to as a left-side tilt angle α ₁ The predetermined right-side tilt angle α is defined as a right-side tilt angle α ₂ Wherein α is ₁ And alpha ₂ May or may not be equal.

In some embodiments, the mri apparatus includes one radar sensor 100, and the substrate 121 of the radar sensor 100 is parallel to the axis of the scanning hole 210, and the radar sensor 100 is located in the central region (the midpoint along the axial direction) of the scanning cylinder 200. In other embodiments, the magnetic resonance imaging includes two radar sensors 100, and the substrates 121 of the two radar sensors 100 are parallel to the axis of the scanning hole 210, i.e. α in fig. 25 ₁ And alpha ₂ Are all 0 degrees. In some other embodiments, the magnetic resonance imaging apparatus comprises a plurality of the radar sensors 100, wherein the substrate 121 of each radar sensor 100 is parallel to the axis of the scanning hole 210; alternatively, the substrate 121 of one radar sensor 100 is arranged at an angle to the axis of the scanning aperture 210, and the substrates 121 of the remaining radar sensors 100 are all parallel to the axis of the scanning aperture 210.

Optionally, the scanning cylinder 200 has a mounting groove 220 corresponding to the radar sensor 100, the mounting groove 220 is used for accommodating the radar sensor 100, and the mounting groove 220 is recessed in the outer wall of the scanning cylinder 200 inward (toward the central axis) in the radial direction of the scanning hole 210.

Based on the magnetic resonance imaging apparatus as described above, the present embodiment also provides a magnetic resonance imaging system including the magnetic resonance imaging apparatus as described above. It is to be understood that the magnetic resonance imaging system has the advantages of the magnetic resonance imaging apparatus, since the magnetic resonance imaging system includes the magnetic resonance imaging apparatus, the operating principle and other structures of the magnetic resonance imaging system are not described in detail, and those skilled in the art can configure the magnetic resonance imaging system accordingly.

[ EXAMPLE II ]

The present embodiment is described with reference to fig. 27 to 32. Fig. 27 to 32 are schematic views of the windowing region according to the second embodiment of the present invention.

In this embodiment, the windowing region 1110 includes at least two through holes, and the at least two through holes are arranged in an array. The shape of the through hole is not particularly limited, and may be a circular hole, an elliptical hole, a polygonal hole, or the like, or a combination of at least two of the above.

The difference between the present embodiment and the first embodiment is that the windowing region 1110 is configured as a plurality of through holes arranged in an array, and the inner walls of the through holes are not provided with the second shielding layer, nor is the shielding frame 123 used to surround the antenna element 122. With such a configuration, those skilled in the art can realize electromagnetic compatibility in the magnetic resonance system according to the number and arrangement of the through holes.

In an exemplary embodiment, please continue to refer to fig. 27-32, respectively. The window area 1110 shown in fig. 27 and 28 has two through holes, the two through holes of fig. 27 are arranged in the length direction of the lower base case 111, and the two through holes of fig. 28 are arranged in the width direction of the lower base case 111; the window area 1110 shown in fig. 29 and 30, respectively, has three through holes, the three through holes in fig. 29 are arranged in the width direction of the lower base case 111, and the three through holes in fig. 30 are arranged in the length direction of the lower base case 111; FIG. 31 shows a windowed area 1110 having four through holes arranged in an array; fig. 32 shows a fenestration area 1110 having six through-holes arranged in an array.

In summary, the radar sensor provided by the present invention includes a housing and a detecting body, wherein the detecting body is disposed inside the housing, the housing includes a lower base shell, and the lower base shell is provided with a windowing region for signal transmission; the probe body comprises a substrate and an antenna assembly, wherein the antenna assembly is arranged on the substrate and transmits and receives signals through the windowing area. Further, the invention provides a magnetic resonance imaging apparatus comprising a scanning barrel and a radar sensor as described above, wherein the scanning barrel is provided with a scanning hole for loading a predetermined object; the at least two radar sensors are arranged on the scanning barrel at intervals along the axial direction of the scanning hole, and the at least two radar sensors are arranged in a collinear manner; the base plates of at least two radar sensors are arranged at an angle with the axis of the scanning hole, and the base plates of at least two radar sensors are inclined towards each other along the axial direction of the scanning hole. The radar sensor is arranged on the scanning cylinder, so that the magnetic resonance examination mode of the preset object can be simplified; by arranging at least two substrates to incline oppositely, the antenna assembly of the radar sensor can scan a preset object in a wide range, and can scan a preset part more accurately, so that motion artifacts generated by imaging when physiological motion signals are collected are corrected.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims

1. A radar sensor is characterized by comprising a shell, a first shielding layer and a detecting body, wherein the detecting body is arranged inside the shell;

the probe body comprises a substrate and an antenna component, wherein the antenna component is arranged on the substrate and transmits and receives signals through the windowing area;

the first shielding layer is arranged on the outer wall of the shell;

the windowing region comprises one or at least two through holes penetrating through the lower base shell;

when the windowing region comprises one through hole, the radar sensor further comprises a second shielding layer, the second shielding layer is arranged on the inner wall of the through hole, the first shielding layer is electrically connected with the second shielding layer, the detector further comprises a shielding frame, the shielding frame is arranged on the side, provided with an antenna assembly, of the substrate, the antenna assembly is arranged in the range of the shielding frame, the shielding frame is accommodated in the through hole, and a gap is formed between the periphery of the shielding frame and the second shielding layer.

2. The radar sensor of claim 1, wherein the antenna assembly is disposed on a side of the substrate facing the windowed area, and the antenna assembly is within the area of the windowed area.

3. The radar sensor of claim 1, wherein the housing further comprises an upper base shell, the upper base shell being stepped.

4. The radar sensor of claim 1, further comprising a plurality of mounting brackets disposed on the housing, the radar sensor configured to be mounted on a scanning drum via the mounting brackets, the mounting brackets being disposed at an angle to the base plate.

5. The radar sensor of claim 1, wherein at least two of the through-holes are arranged in an array.

6. The radar sensor of claim 1, wherein the shield frame extends in a direction perpendicular to the substrate.

7. The radar sensor of claim 1, wherein the probe further comprises a main chip and a shield, the main chip is disposed on a side of the substrate where the antenna assembly is disposed, the main chip is connected to the antenna assembly, and the main chip is outside the window area; the shielding case is used for covering the main chip.

8. A magnetic resonance imaging apparatus, comprising a scanning drum having a scanning aperture for loading a predetermined object and at least two radar sensors according to any one of claims 1 to 7 for scanning the predetermined object; at least two radar sensors are arranged on the scanning cylinder at intervals along the axial direction of the scanning hole, and the at least two radar sensors are arranged in a collinear mode.

9. The MRI apparatus of claim 8, wherein the substrates of at least two of the radar sensors are arranged at an angle to the axis of the scanning bore, and the substrates of at least two of the radar sensors are inclined toward each other along the axial direction of the scanning bore.

10. The MRI apparatus of claim 8, wherein the scan cylinder has a mounting slot corresponding to the radar sensor, the mounting slot being adapted to receive the radar sensor, the mounting slot being recessed in an outer wall of the scan cylinder radially inward of the scan bore.

11. A magnetic resonance imaging system, characterized in that it comprises a magnetic resonance imaging device according to any one of claims 8 to 10.