CN112946633B - Radar sensor, magnetic resonance imaging equipment and magnetic resonance imaging system - Google Patents

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 equipment and magnetic resonance imaging system

technical field

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

Background technique

Existing radar sensors are usually set on medical scanning suits, and patients wear the scanning suits for magnetic resonance examinations, so as to collect physiological movement information. The above-mentioned magnetic resonance examination method is cumbersome, the scanning range of the radar sensor is small, and the imaging when the radar sensor scans the patient's abdomen is prone to motion artifacts.

Contents of the invention

The purpose of the present invention is to provide a radar sensor, magnetic resonance imaging equipment and magnetic resonance imaging system to solve the problems of cumbersome magnetic resonance examination methods, small scanning range and motion artifacts generated by imaging.

In order to solve the above technical problems, based on one aspect of the present invention, the present invention provides a radar sensor, which includes a casing and a detection body, and the detection body is arranged inside the casing;

The housing includes a lower base shell, and the lower base shell is provided with a window area for signal transmission;

The detection body includes a substrate and an antenna assembly, and the antenna assembly is arranged on the substrate and transmits and receives signals through the windowed area.

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

Optionally, the housing further includes an upper base shell, and the upper base shell is stepped.

Optionally, the radar sensor further includes a plurality of mounting brackets arranged on the housing, the radar sensor is used to be assembled on a scanning cylinder through the mounting brackets, and the mounting brackets are formed with the substrate. Arranged angularly.

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

Optionally, the window opening area includes a through hole penetrating through the lower base shell.

Optionally, the window opening area includes at least two through holes, and the at least two 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 arranged on the outer wall of the housing, and the second shielding layer is arranged on the inner wall of the through hole Above, the first shielding layer is electrically connected to the second shielding layer.

Optionally, the detection body further includes a shielding frame, the shielding frame is disposed on a side of the substrate on which the antenna assembly is provided, and the antenna assembly is within a range of the shielding frame.

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

Optionally, the probe further includes a main chip and a shielding cover, the main chip is arranged on the side of the substrate where the antenna assembly is provided, the main chip is connected to the antenna assembly, and the main chip is placed on the side of the antenna assembly. Outside the scope of the window area; the shielding cover is used to cover the main chip.

Based on another aspect of the present invention, the present invention also provides a magnetic resonance imaging device, which includes a scanning cylinder and the above-mentioned radar sensor, the scanning cylinder has a scanning hole for loading a predetermined object, and the radar sensor uses For scanning the predetermined object; at least two of the radar sensors are disposed on the scanning cylinder at intervals along the axial direction of the scanning hole, and at least two of the radar sensors are collinearly arranged.

Optionally, the substrates of at least two radar sensors are arranged at an angle to the axis of the scanning hole, and the substrates of at least two radar sensors are inclined toward each other along the axis of the scanning hole.

Optionally, the scanning barrel has a mounting groove corresponding to the radar sensor, the mounting groove is used to accommodate the radar sensor, and the mounting groove is recessed inwardly in the radial direction of the scanning hole. The outer wall of the scanning cylinder.

Based on still another aspect of the present invention, the present invention also provides a magnetic resonance imaging system, which includes the above-mentioned magnetic resonance imaging device.

In summary, the radar sensor provided by the present invention includes a casing and a detection body, the detection body is arranged inside the casing, the casing includes a lower base shell, and the lower base shell is provided with a The windowed area; the detection body includes a substrate and an antenna assembly, the antenna assembly is arranged on the substrate, and transmits and receives signals through the windowed area. Further, the magnetic resonance imaging equipment provided by the present invention includes a scanning cylinder and the above-mentioned radar sensor, the scanning cylinder has a scanning hole for loading a predetermined object; at least two of the radar sensors are arranged along the axial direction of the scanning hole The scanning cylinder is arranged at intervals, and at least two of the radar sensors are arranged in line; the substrates of at least two of the radar sensors are arranged at an angle to the axis of the scanning hole, and at least two of the radar sensors are arranged at an angle to the axis of the scanning hole. The substrates of the radar sensor are inclined towards each other along the axial direction of the scanning hole. By installing the radar sensor on the scanning cylinder, the method of magnetic resonance examination of the predetermined object can be simplified; by setting at least two substrates inclined to each other, the antenna assembly of the radar sensor can scan the predetermined object in a wide enough range, and scan the predetermined part more accurately. Accurate, thereby correcting motion artifacts generated by imaging when acquiring physiological motion signals.

Description of drawings

Those skilled in the art should understand that the accompanying drawings are provided for better understanding of the present invention, and do not constitute any limitation to the scope of the present invention. in:

1 to 4 are exploded views of the radar sensor according to Embodiment 1 of the present invention;

5 to 6 are schematic diagrams of a radar sensor according to Embodiment 1 of the present invention;

7 to 9 are schematic diagrams of the probe body in Embodiment 1 of the present invention;

Figures 10 to 11 are schematic diagrams of the upper base case of Embodiment 1 of the present invention;

Fig. 12 is a schematic diagram of the mounting bracket on the housing according to Embodiment 1 of the present invention;

Fig. 13 is a schematic diagram of the installation of the radar sensor according to Embodiment 1 of the present invention;

Fig. 14 is a schematic diagram of the lower base case of Embodiment 1 of the present invention;

15 to 16 are schematic diagrams of the assembly of the probe body on the lower base case according to Embodiment 1 of the present invention;

17 to 20 are schematic diagrams of the first shielding layer disposed on the casing according to Embodiment 1 of the present invention;

FIG. 21 is a schematic diagram of a second shielding layer disposed on the inner wall of a through hole according to Embodiment 1 of the present invention;

22 is a schematic diagram of the positional relationship between the second shielding layer and the shielding frame in Embodiment 1 of the present invention;

Fig. 23 is a schematic diagram of a magnetic resonance imaging device according to Embodiment 1 of the present invention;

Fig. 24 is an enlarged view of part A in Fig. 23;

Fig. 25 is a front view of the magnetic resonance imaging device according to Embodiment 1 of the present invention;

Fig. 26 is a schematic diagram of the working magnetic resonance imaging device of Embodiment 1 of the present invention;

27 to 32 are schematic diagrams of the window opening area in Embodiment 2 of the present invention.

In the attached picture:

100-radar sensor; 110-shell; 111-lower base shell; 1110-window area; 112-upper base shell; 1120-step surface; 120-detection body; 121-substrate; 122-antenna assembly; Frame; 124-main chip; 125-shielding cover; 130-installation bracket; 141-upper shielding base layer; 142-lower shielding base layer; 150-second shielding layer;

200-scanning barrel; 210-scanning hole; 220-installation groove; 300-predetermined object; 400-examination table; α-predetermined tilt angle; β-scan coverage angle.

Detailed ways

In order to make the purpose, advantages and features of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in very simplified form and not drawn to scale, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention. In addition, the structures shown in the drawings are often a part of the actual structure. In particular, each drawing needs to display different emphases, and sometimes uses different scales.

As used in the present invention, the singular forms "a", "an" and "the" include plural objects, the term "or" is usually used in the sense of including "and/or", and the term "several" Usually, the term "at least one" is used in the meaning of "at least one", and the term "at least two" is usually used in the meaning of "two or more". In addition, the terms "first", "second "Two" and "third" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or at least two of these features, unless the content clearly states otherwise.

The invention provides a radar sensor, magnetic resonance imaging equipment and a magnetic resonance imaging system to solve the problems of cumbersome magnetic resonance examination methods, small scanning range and motion artifacts generated by imaging.

[Example 1]

Please refer to FIG. 1 to FIG. 26 for description of this embodiment.

As shown in Figures 1 to 4, Figures 1 to 4 are exploded views of the radar sensor according to Embodiment 1 of the present invention. This embodiment provides a radar sensor 100, which includes a housing 110 and a detection body 120. The detection The body 120 is disposed inside the housing 110; the housing 110 includes a lower base housing 111, and the lower base housing 111 is provided with a window area 1110 for signal transmission; continue to refer to FIG. 1 and refer to FIG. 7 in conjunction with , FIG. 7 is a schematic diagram of a probe according to Embodiment 1 of the present invention. The probe 120 includes a substrate 121 and an antenna assembly 122. The antenna assembly 122 is arranged on the substrate 121 and transmits and receives through the window area 1110. signal (antenna signal). In an exemplary embodiment, the substrate 121 is a PCB board.

Further, please continue to refer to FIG. 1 and FIG. 3 , the antenna assembly 122 is disposed on the side of the substrate 121 facing the window opening area 1110 , and the antenna assembly 122 is within the range of the window opening area 1110 , Here, it specifically means that the transmission route of the antenna assembly 122 for sending and receiving signals is within the range of the windowed area 1110, so that the antenna assembly 122 can normally send and receive signals.

Further, the housing 110 also includes an upper base shell 112, as shown in Figure 5 and Figure 6, Figure 5 to Figure 6 are schematic diagrams of the radar sensor 1 according to Embodiment 1 of the present invention, the upper base shell 112 and the lower base shell 111 The casing 110 is formed by assembling with each other. Specifically, the upper base shell 112, the base plate 121 of the probe body 120, and the lower base shell 111 are sequentially tightened and connected by screws, as shown in Figure 15 and Figure 16, Figures 15 to 16 are the assembly of the probe body in Embodiment 1 of the present invention In the schematic view on the lower base case 111 , in this embodiment, the substrate 121 and the lower base case 111 are first assembled together, and then the upper base case 112 is assembled, that is, the substrate 121 is disposed on the lower base case 111 . Certainly, the base plate 121 can also be arranged on the upper base shell 112, or at least two parts of the base plate 121 can be respectively set on the upper base shell 112 and the lower base shell 111.

Preferably, continue to refer to FIG. 6 together with reference to FIG. 10 and FIG. 11 . FIG. 10 and FIG. 11 are schematic diagrams of the upper base case according to Embodiment 1 of the present invention, and the upper base case 112 is stepped. Please refer to FIG. 13. FIG. 13 is a schematic diagram of the installation of the radar sensor according to Embodiment 1 of the present invention. The housing 110 of the radar sensor 100 is obliquely accommodated in a cavity (specifically, the installation groove 220 hereinafter), and the upper base case The stepped shape of 112 can reduce the space occupied by the casing 110 . It can be understood that the upper base shell 112 includes a plurality of sequentially connected step surfaces 1120, and two adjacent step surfaces 1120 include but are not limited to being parallel. For example, two adjacent step surfaces 1120 can also be inclined. 11. The stepped surface 1120 on one side of the upper base shell 112 (the rightmost side in FIG. 11 ) is obliquely connected to the previous stepped surface 1120 to use the shell 110 to occupy less space. In addition, the stepped surface 1120 referred to in this embodiment includes but is not limited to a flat shape, and may also be a curved surface (such as a spherical surface), or an arc surface. Therefore, the stepped shape here should be understood as the upper base shell 112 is roughly stepped.

In some embodiments, a plurality of arc-shaped stepped surfaces 1120 are connected in sequence, two adjacent stepped surfaces 1120 transition through an arc segment, and the upper base shell 112 is substantially arc-shaped. In this way, the thickness of the housing 110 (the length from the upper base shell 112 to the lower base shell 111) gradually decreases along the extension direction of the substrate 121 (here, refer to the rightward direction in FIG. 11 ), which can be understood. It is the stepped upper base shell 112 referred to in this embodiment.

Further, the radar sensor 100 also includes a plurality (three shown in this embodiment) of mounting brackets 130 arranged on the housing 110, and the radar sensor 100 is used to be assembled to a scanning cylinder through the mounting brackets 130 200 , the mounting bracket 130 is arranged at an angle to the base plate 121 . Please refer to FIG. 12. FIG. 12 is a schematic diagram of the installation bracket in Embodiment 1 of the present invention. The installation bracket 130 is arranged at an angle to the bottom surface of the lower base shell 111. In this embodiment, the default substrate 121 is parallel to the bottom surface of the lower base shell 111, so the installation The bracket 130 is arranged at an angle to the base plate 121 . It should be noted that this embodiment does not specifically limit the positional relationship between the bottom surface of the lower base case 111 and the base plate 121, the two can be parallel or inclined, and this embodiment only needs to satisfy the oblique relationship between the mounting bracket 130 and the base plate 121 . Actually, the mounting bracket 130 is disposed parallel to the scanning cylinder 200 , please refer to FIG. 13 , so that the antenna assembly 122 on the substrate 121 and the scanning cylinder 200 can be arranged at an angle through the mounting bracket 130 . Arranged at an angle here means that the angle formed by the mounting bracket 130 and the base plate 121 is an acute angle, and the mounting bracket 130 is inclined compared to the base plate 121 . Preferably, the mounting bracket 130 is in the shape of a plate. It should be noted that a plurality of mounting brackets 130 can be set on the upper base shell 112, or all can be set on the lower base shell 111, or a part can be set on the upper base shell 112, and a part can be set on the lower base shell 111, those skilled in the art can According to the actual corresponding configuration; as shown in FIG. 14 , FIG. 14 is a schematic diagram of the lower base case 111 of Embodiment 1 of the present invention, and the three mounting brackets 130 of this embodiment are all arranged on the lower base case 111 .

Preferably, the radar sensor 100 further includes a first shielding layer, and the first shielding layer is disposed on the outer wall of the casing 110 . In this embodiment, the housing 110 is made of insulating material (such as plastic), the first shielding layer is a metal layer (such as copper), and the first shielding layer is arranged on the outer wall of the housing 110, which can replace the metal housing 110, thereby eliminating the eddy current phenomenon in the magnetic resonance system and effectively avoiding electromagnetic interference.

Actually, as shown in Fig. 17 to Fig. 20, Fig. 17 to Fig. 20 are schematic diagrams of the first shielding layer disposed on the casing according to Embodiment 1 of the present invention, and the first shielding layer includes an upper shielding base layer 141 and a lower shielding layer Base layer 142, as shown in Figure 17 and Figure 18, the upper shielding base layer 141 is glued and formed on the outer wall of the upper base shell 112; as shown in Figure 19 and Figure 20, the lower shielding base layer 142 is glued to the outer wall of the formed lower base shell 111 Upper: After the upper shielding base layer 141 and the lower shielding base layer 142 are respectively formed, the upper base shell 112 and the lower base shell 111 are assembled to form the housing 110. After assembly, the upper shielding base layer 141 and the lower shielding base layer 142 need to be contact connection.

Further, please continue to refer to FIG. 14 , the window opening area 1110 includes a through hole penetrating through the lower base shell 111 . There is no specific limitation on the shape of the through hole, for example, it may be a circular hole, an elliptical hole, or a polygonal hole (such as a rectangular hole).

Preferably, the radar sensor 100 further includes a first shielding layer and a second shielding layer 150, and the first shielding layer is arranged on the outer wall of the housing 110 (refer to the foregoing description), please refer to FIG. 21, FIG. 21 It is a schematic diagram of the second shielding layer disposed on the inner wall of the through hole according to Embodiment 1 of the present invention. The second shielding layer 150 is disposed on the inner wall of the through hole. In addition, the first shielding layer and the second shielding layer The shielding layer 150 is electrically connected to realize conductive shielding. Actually, when the lower shielding base layer 142 is formed on the outer wall of the lower base shell 111, the lower shielding 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 shielding layer 150, which can be understood as the second Shielding layer 150 is part of lower shielding base layer 142 .

It should be noted that the first shielding layer and the second shielding layer can be made of conductive flexible materials (such as carbon fiber cloth); the first shielding layer and the second shielding layer can also be formed by spraying conductive paint or electroplating metal film on hard or flexible insulating materials. The second shielding layer 150; is also not limited to one or more of the above combinations. In an exemplary embodiment, both the first shielding layer and the second shielding layer 150 are shielding foils.

Further, please refer to FIG. 8 and FIG. 9. FIG. 8 and FIG. 9 are schematic diagrams of the probe body according to Embodiment 1 of the present invention. There is one side of the antenna assembly 122 , and the antenna assembly 122 is within the range of the shielding frame 123 , that is, the shielding frame 123 surrounds the antenna assembly 122 . Preferably, please refer to FIG. 22 . FIG. 22 is a schematic diagram of the positional relationship between the second shielding layer and the shielding frame 123 according to Embodiment 1 of the present invention. The shielding frame 123 extends along a direction perpendicular to the substrate 121 and accommodates the In the through hole, there is a gap between the outer periphery of the shielding frame 123 and the second shielding layer, so as to prevent the leakage of electromagnetic waves in the radar sensor 100 .

Optionally, the probe 120 also includes a main chip 124 and a shielding cover 125, the main chip 124 is arranged on the side of the substrate 121 provided with the antenna assembly 122, and the main chip 124 is connected to the antenna assembly 122 , the main chip 124 is outside the window area 1110 ; the shielding cover 125 is used to cover the main chip 124 . It should be noted that the shielding frame 123 , the shielding case 125 and the casing 110 provided with the first shielding layer in this embodiment interact to assist in realizing electromagnetic compatibility in the magnetic resonance system. It should be noted that, in fact, the main chip 124 is embedded in the substrate 121, and only the part of the main chip 124 on the same side as the antenna assembly 122 is described here. “A side of 122 ” summarizes the part where the main chip 124 and the antenna assembly 122 are on the same side.

Based on the above-mentioned radar sensor, this embodiment also provides a magnetic resonance imaging device, as shown in FIG. 23 , which is a schematic diagram of a magnetic resonance imaging device according to Embodiment 1 of the present invention. The magnetic resonance imaging device includes a scanning cylinder 200 And the radar sensor 100 mentioned above, the scanning cylinder 200 has a scanning hole 210 for loading a predetermined object 300, and the radar sensor 100 is used to scan the predetermined object 300; at least two of the radar sensors 100 along the The scanning holes 210 are arranged on the scanning cylinder 200 at intervals in the axial direction, and at least two of the radar sensors 100 are arranged in line, that is, they are arranged along the axes of the scanning holes 210 . By installing the radar sensor 100 on the scanning tube 200 , the manner in which the predetermined object 300 undergoes an MRI examination can be simplified.

Specifically, please refer to FIG. 26 . FIG. 26 is a schematic diagram of the working magnetic resonance imaging device of Embodiment 1 of the present invention. In the hole 210, at least two radar sensors 100 are provided to scan a predetermined part (such as the abdomen) of the predetermined object 300, so as to collect physiological motion signals.

Preferably, please refer to FIG. 24 and FIG. 25. FIG. 24 is an enlarged view of part A in FIG. 23, and FIG. 121 is arranged at an angle to the axis of the scanning hole 210 , and the substrates 121 of at least two radar sensors 100 are inclined toward each other along the axis of the scanning hole 210 . It should be understood that the substrate 121 is arranged at an angle to the axis of the scanning hole 210, which means that the axis of the scanning hole 210 passes through the substrate 121 obliquely (the angle formed by the two is an acute angle); and tilting towards each other means that the two substrates 121 are facing each other tilt. By arranging at least two substrates 121 to be inclined towards each other, the scanning range of the antenna assembly 122 of the radar sensor 100 to the predetermined object 300 can be wide enough, and the predetermined part can be scanned more accurately, thereby correcting motion artifacts generated by imaging when collecting physiological motion signals .

It should be noted that the included angle between the substrate 121 of the radar sensor 100 and the axis of the scanning hole 210 is denoted as a predetermined inclination angle α, and the scanning range of the radar sensor 100 (actually referring to the coverage area of the antenna assembly 122) is denoted as Scan coverage angle β. Please continue to refer to FIG. 25 , taking the two radar sensors 100 as an example, in order to scan a wide enough range, it is necessary to adjust the size of the predetermined inclination angle α, so that at least a part of the scanning range of the two radar sensors 100 on the examination table 400 Coincident (including the scanning range of the two just adjacent to each other). Those skilled in the art can adjust the size of the predetermined inclination angle α according to the actual situation and the radial position of the examination bed 400 in the scanning hole 210 (here, it can be understood as the distance from the examination bed 400 to the central axis of the scanning hole 210 in the radial direction). , to obtain better imaging of the intended portion. Here, let the predetermined inclination angle α on the left side of Fig. 25 be the left inclination angle α ₁ , and the predetermined inclination angle α on the right side be the right inclination angle α ₂ , where α ₁ and α ₂ may be equal or not.

In some embodiments, the magnetic resonance imaging device includes a 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 area of the scanning cylinder 200 (along axial midpoint). In some 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, that is, in FIG. 25, α ₁ and α ₂ are both is 0°. In some other embodiments, the magnetic resonance imaging device includes a plurality of radar sensors 100, wherein the substrate 121 of each radar sensor 100 is parallel to the axis of the scanning hole 210; or, one radar sensor 100 The substrate 121 is arranged at an angle to the axis of the scanning hole 210 , and the substrates 121 of the remaining radar sensors 100 are all parallel to the axis of the scanning hole 210 .

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

Based on the above-mentioned magnetic resonance imaging device, this embodiment further provides a magnetic resonance imaging system, which includes the above-mentioned magnetic resonance imaging device. It should be understood that since the magnetic resonance imaging system includes the magnetic resonance imaging equipment, the magnetic resonance imaging system also has the beneficial effects brought by the magnetic resonance imaging equipment, and the magnetic resonance imaging system here The working principle and other structures are not described in detail, and those skilled in the art can configure accordingly.

[Example 2]

This embodiment is described with reference to FIG. 27 to FIG. 32 . 27 to 32 are schematic diagrams of the window opening area in Embodiment 2 of the present invention.

In this embodiment, the window opening area 1110 includes at least two through holes, and the at least two through holes are arranged in an array. In this embodiment, like the first embodiment, there is no specific limitation on the shape of the through hole, for example, it may be a circular hole, an elliptical hole, a polygonal hole, etc., or a combination of at least two of the above.

The difference between this embodiment and Embodiment 1 is that the window opening area 1110 of this embodiment is set as a plurality of through holes arranged in an array, and the inner wall of the through holes is not provided with a second shielding layer, and the shielding frame 123 circles are not used. Hold the antenna assembly 122. With such a configuration, those skilled in the art can configure the number and arrangement of the through holes according to the actual situation, and also realize the electromagnetic compatibility in the magnetic resonance system.

In an exemplary embodiment, please continue to refer to FIG. 27 to FIG. 32 respectively. The window opening area 1110 shown in FIG. 27 and FIG. 28 has two through holes. The two through holes in FIG. 27 are arranged along the length direction of the lower base case 111, and the two through holes in FIG. Arrangement in the width direction; the window opening area 1110 shown in Figure 29 and Figure 30 has three through holes, the three through holes in Figure 29 are arranged along the width direction of the lower base shell 111, and the three through holes in Figure 30 Arranged along the length direction of the lower base shell 111; the window opening area 1110 shown in Figure 31 has four through holes arranged in an array; the window opening area 1110 shown in Figure 32 has six through holes in an array arranged.

In summary, the radar sensor provided by the present invention includes a casing and a detection body, the detection body is arranged inside the casing, the casing includes a lower base shell, and the lower base shell is provided with a The windowed area; the detection body includes a substrate and an antenna assembly, the antenna assembly is arranged on the substrate, and transmits and receives signals through the windowed area. Further, the magnetic resonance imaging equipment provided by the present invention includes a scanning cylinder and the above-mentioned radar sensor, the scanning cylinder has a scanning hole for loading a predetermined object; at least two of the radar sensors are arranged along the axial direction of the scanning hole The scanning cylinder is arranged at intervals, and at least two of the radar sensors are arranged in line; the substrates of at least two of the radar sensors are arranged at an angle to the axis of the scanning hole, and at least two of the radar sensors are arranged at an angle to the axis of the scanning hole. The substrates of the radar sensor are inclined towards each other along the axial direction of the scanning hole. By installing the radar sensor on the scanning cylinder, the method of magnetic resonance examination of the predetermined object can be simplified; by setting at least two substrates inclined to each other, the antenna assembly of the radar sensor can scan the predetermined object in a wide enough range, and scan the predetermined part more accurately. Accurate, thereby correcting motion artifacts generated by imaging when acquiring physiological motion signals.

The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention. Any changes and modifications made by those of ordinary skill in the field of the present invention based on the above disclosures shall fall within the protection scope of the claims.

Claims (11)

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 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 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.

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