Aperture projection device and medical imaging system

Abstract

The utility model relates to an aperture projection device and a medical image system. An aperture projection device is applied to a medical imaging system, and comprises a housing having a mounting cavity; the projection light machine is mounted in the mounting cavity and is used for projecting a projection pattern; and the mounting structure is arranged on the shell, and the projection device is detachably connected with a to-be-mounted part through the mounting structure. When the aperture projection device breaks down, the aperture projection device is convenient to maintain.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to an aperture projection device and a medical imaging system. Background Art

[0002] In modern medicine, scanning patients using medical imaging systems (such as X-ray systems, magnetic resonance imaging systems, computed tomography systems, positron emission tomography systems, and radiotherapy systems) has become a common diagnostic and treatment method. When using these medical imaging systems for scanning, patients usually need to be placed into the scanning bore via a hospital bed. Due to the narrow space within the scanning bore, patients are prone to feeling nervous and uneasy during the scanning process, which in turn causes abnormal movements, introduces motion artifacts, and results in poor scanning quality. Therefore, in the related art, a projection device is usually installed on the hospital bed, and an image or video is projected into the scanning bore by the projection device to distract the patient's attention, reduce their anxiety, and provide scanning guidance to the patient, thereby improving the quality of the scanning image. However, in the related art, when the projection device malfunctions, it is relatively troublesome to repair it. Utility Model Content

[0003] Based on this, it is necessary to provide an aperture projection device and a medical imaging system, which can be easily repaired when a failure occurs in the aperture projection device.

[0004] An aperture projection device, applied to a medical imaging system, comprising:

[0005] a housing having a mounting cavity;

[0006] a projection light engine, installed in the installation cavity and used for projecting a projection pattern; and

[0007] The mounting structure is provided on the housing, and the projection device is detachably connected to the component to be mounted via the mounting structure.

[0008] In some embodiments, the mounting structure includes a male connector and a compression sleeve connected thereto, the male connector is in contact and conduction with the female connector in the part to be mounted, and the compression sleeve is connected and locked with the part to be mounted.

[0009] In some embodiments, the compression sleeve is sleeved on the outside of the male connector, and the two are rotatably connected. The compression sleeve has an annular threaded section, and the compression sleeve is threadedly connected to the part to be installed via the threaded section.

[0010] In some embodiments, a concave or convex blocking portion is connected to the male connector, and an abutting portion is provided on the clamping sleeve. When the clamping sleeve is tightened to a preset position, the abutting portion is blocked by the blocking portion.

[0011] In some embodiments, the male connector has a limiting portion that is plugged into and fits with the female connector, and the limiting portion is a protrusion or a groove.

[0012] In some embodiments, the mounting structure includes a clamping jaw and a first adjusting member connected thereto, the clamping jaw includes two clamping parts rotatably connected, and the first adjusting member is configured to adjust the degree of opening of the two clamping parts.

[0013] In some embodiments, the mounting structure includes a mounting base connected to the clamping jaw, and the mounting base and the housing are rotatably connected via a universal ball joint.

[0014] In some embodiments, the mounting structure includes a second adjusting member connected to the mounting seat, and the second adjusting member is configured to movably abut against the universal ball head.

[0015] A medical imaging system includes the above-mentioned aperture projection device, a scanning device and the part to be mounted, the scanning device having a scanning aperture for accommodating a patient, the aperture projection device being detachably mounted on the part to be mounted via the mounting structure, wherein the aperture projection device is configured to project a projection pattern onto the inner wall of the scanning aperture.

[0016] In some embodiments, the medical imaging system includes a data receiver and transmitter disposed in a scanning room, and the data receiver and transmitter is communicatively connected to the aperture projection device.

[0017] The aforementioned aperture projection device and medical imaging system incorporates a projection engine within its housing for projection within the scanning aperture. Projected images or videos distract patients, alleviating anxiety, while also providing scanning guidance and improving imaging quality. The projection device is detachably connected to the mounting member via a mounting structure. Therefore, if the aperture projection device malfunctions, it can be completely removed from the mounting member for repair and replacement, making operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 1 is a schematic diagram of a medical imaging system according to an embodiment of the present application.

[0019] Figure 2 FIG. 1 is a schematic diagram of an aperture projection device in an embodiment of the present application.

[0020] Figure 3 for Figure 2 Schematic diagram of the connection between the aperture projection device and the component to be installed in the embodiment shown.

[0021] Figure 4FIG. 1 is a schematic diagram of a medical imaging system in another embodiment of the present application.

[0022] Figure 5 This is an exploded view of an aperture projection device in another embodiment of the present application.

[0023] Figure 6 for Figure 5 Schematic diagram of the installation structure in the embodiment shown.

[0024] Reference numerals:

[0025] 10. Aperture projection device;

[0026] 100, housing; 110, front housing; 111, air inlet and outlet; 120, rear housing; 121, extension rod; 130, installation cavity;

[0027] 210, projection light engine; 220, distance sensor; 230, main control board; 240, speaker; 250, fan; 260, battery; 270, indicator light; 280, switch button;

[0028] 310, male connector; 311, limiting portion; 320, pressing sleeve; 321, threaded section; 322, abutting portion; 330, connector fixing member; 331, blocking portion; 340, bracket base; 350, bracket cantilever;

[0029] 410, clamping claw; 411, clamping portion; 420, first adjusting member; 421, adjusting screw; 430, mounting seat; 440, universal ball joint; 450, second adjusting member;

[0030] 500, part to be installed; 510, bed board; 511, female connector; 512, threaded groove;

[0031] 610, scanning device; 611, scanning hole; 620, data receiver and transmitter; 630, network cable; 640, host computer; 650, power cord; 660, power cabinet. DETAILED DESCRIPTION

[0032] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0034] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0035] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0038] See Figure 1 、 Figure 2 、 Figure 4 and Figure 5 An aperture projection device 10 provided in one embodiment of the present application is used in a medical imaging system. The aperture projection device 10 includes a housing 100, a projection light engine 210, and a mounting structure. The housing 100 has a mounting cavity 130, and the projection light engine 210 is mounted within the mounting cavity 130 and is used to project a projection pattern. The mounting structure is provided on the housing 100, and the projection device 10 is detachably connected to a mounting member 500 via the mounting structure.

[0039] In the above embodiment, a projection light engine 210 is installed within the housing 100 to project images into the scanning aperture 611 of the scanning device 610. The projected images or videos distract the patient, alleviating their anxiety, while also providing scanning guidance and improving scanning image quality. The projection device 10 is detachably connected to the mounting member 500 via the mounting structure. Therefore, if the aperture projection device 10 malfunctions, it can be completely removed from the mounting member 500 for repair and replacement, making operation more convenient.

[0040] In the embodiment shown in the accompanying drawings, the mounting member 500 is a hospital bed, which includes a bed board 510. The mounting structure and bed board 510 are detachably connected. In other words, the aperture projection device 10 is detachably mounted to the bed board 510 via the mounting structure. Of course, in other embodiments, the aperture projection device 10 can also be detachably mounted to other locations via the mounting structure, such as a head coil or a bed accessory.

[0041] See Figures 1 to 3 In some embodiments, the aperture projection device 10 is configured to be electrically connected to the mounting member 500 via the mounting structure, and locked relative to the mounting member 500 via the mounting structure. This allows the aperture projection device 10 to be locked to the mounting member 500 after they are electrically connected, preventing them from separating and ensuring a stable electrical connection between them.

[0042] See Figures 1 to 3In some embodiments, the part to be installed 500 includes a female connector 511, and the installation structure includes a male connector 310 and a compression sleeve 320 connected thereto. The male connector 310 and the female connector 511 in the part to be installed 500 are in contact and conductive, and the compression sleeve 320 and the part to be installed 500 are connected and locked.

[0043] Specifically, the bed board 510 includes a female connector 511. One of the female connector 511 and the male connector 310 is a pin and the other is a slot, and the pin and the slot are plugged together to achieve contact and conduction. Alternatively, one of the female connector 511 and the male connector 310 is a spring pin, which elastically abuts against the other through the spring pin to achieve contact and conduction. Through the contact and conduction of the female connector 511 and the male connector 310, the aperture projection device 10 can be powered by the mounting part 500. Of course, the aperture projection device 10 can also be powered by a battery. The compression sleeve 320 is connected and locked to the mounting part 500, thereby locking the aperture projection device 10 to the mounting part 500, preventing it from separating from the mounting part 500, and ensuring a stable electrical connection between the female connector 511 and the male connector 310.

[0044] See Figures 1 to 3 In some embodiments, the compression sleeve 320 is sleeved on the outside of the male connector 310, and the two are rotatably connected. The compression sleeve 320 has an annular threaded section 321, and the compression sleeve 320 is threadedly connected to the part to be installed 500 via the threaded section 321.

[0045] Specifically, the mounting member 500 has an annular threaded groove 512, into which the threaded segment 321 extends and is threadedly connected. Furthermore, the threaded groove 512 is provided on the bed plate 510. In the embodiment shown in the accompanying drawings, the inner wall of the threaded segment 321 has internal threads, while the inner wall of the threaded groove 512 has external threads. Alternatively, the outer wall of the threaded segment 321 may have internal threads, while the outer wall of the threaded groove 512 may have internal threads.

[0046] The compression sleeve 320 and the male connector 310 are directly rotatably connected, or indirectly rotatably connected through other structures. For example, in the embodiment shown in the accompanying drawings, the mounting structure includes a connector fixing member 330 and a bracket base 340, the male connector 310 is fixedly connected to the connector fixing member 330, the connector fixing member 330 and the bracket base 340 are fixedly connected, and the bracket base 340 and the housing 100 are connected via a bracket cantilever 350. The compression sleeve 320 is sleeved on the outside of the bracket base 340, the connector fixing member 330 and the male connector 310, and the compression sleeve 320 can rotate relative to the bracket base 340, the connector fixing member 330 and the male connector 310.

[0047] Furthermore, in some embodiments, the connector fixture 330 is sleeved onto the outside of the male connector 310, and the two are fixedly connected by threaded fasteners. Alternatively, the two can be connected by means of a clamping connection or welding. The bracket base 340 is located on the side of the connector fixture 330 facing away from the bed board 510. The connector fixture 330 and the bracket base 340 can be fixedly connected by threaded fasteners, or alternatively, by means of a clamping connection or welding.

[0048] In the above embodiment, the compression sleeve 320 and the part to be installed 500 are locked by a threaded connection, thereby locking the aperture projection device 10 to the part to be installed 500, inhibiting it from separating from the part to be installed 500, and ensuring a stable electrical connection between the female connector 511 and the male connector 310.

[0049] In other embodiments, the compression sleeve 320 and the component to be installed 500 may also be connected and locked in other ways, for example, by snap-fitting.

[0050] See Figures 1 to 3 In some embodiments, a concave or convex blocking portion 331 is connected to the male connector 310, and an abutting portion 322 is provided on the tightening sleeve 320. When the tightening sleeve 320 is tightened to a preset position, the abutting portion 322 blocks the blocking portion 331.

[0051] In the embodiment shown in the accompanying drawings, the outer wall of the connector fixing member 330 is provided with an inwardly concave blocking portion 331, i.e., a recessed groove. The inner wall of the compression sleeve 320 is provided with an inwardly convex abutting portion 322, which is located within the recessed groove. When the compression sleeve 320 is tightened, the abutting portion 322 moves within the recessed groove until it abuts the groove wall. At the same time, the compression sleeve 320 abuts the top surface of the bed plate 510.

[0052] In the above embodiment, during the process of tightening the clamping sleeve 320, the abutment portion 322 is blocked by the blocking portion 331. Specifically, the abutment portion 322 abuts against the groove wall of the recessed groove, and the clamping sleeve 320 abuts against the bed board 510. This can limit the clamping sleeve 320 and remind the user that it has been locked in place.

[0053] In other embodiments, the blocking portion 331 can also be set as a boss protruding outward on the outer wall of the connector fixing member 330, and the inner wall of the clamping sleeve 320 is provided with an abutment portion 322 protruding inward. When the clamping sleeve 320 is tightened to a preset position, the abutment portion 322 blocks the boss (blocking portion 331).

[0054] See Figures 1 to 3In some embodiments, the male connector 310 has a limiting portion 311 that is plugged into and fits with the female connector 511 , and the limiting portion 311 is a protrusion or a groove.

[0055] In the embodiment shown in the accompanying drawings, the female connector 511 is a slot, and the male connector 310 is a pin. The male connector 310 is inserted into the female connector 511 to achieve electrical connection. The slot wall is provided with a groove, and the outer side wall of the male connector 310 is provided with a protruding limiter 311. During installation, the limiter 311 is inserted into the groove provided on the slot wall to achieve circumferential alignment of the female connector 511 and the male connector 310. When the clamping sleeve 320 rotates, the male connector 310 can be prevented from rotating with the clamping sleeve 320. In other embodiments, a protrusion can also be provided on the slot wall of the slot, and correspondingly, the limiter 311 is a groove.

[0056] exist Figures 1 to 3 In the illustrated embodiment, when installing the aperture projection device 10, the male connector 310 and the female connector 511 are first aligned in the circumferential direction by the limiting portion 311, and then the male connector 310 is inserted downward into the female connector 511 so that the two are in contact and conductive. The pressing sleeve 320 is then rotated so that the threaded section 321 is threadedly connected to the thread groove 512. When the abutting portion 322 is blocked by the blocking portion 331, the pressing sleeve 320 will simultaneously abut the top surface of the bed plate 510, and the device is now installed in place. When the abutting portion 322 is blocked by the blocking portion 331, the male connector 310 will be pressed downward against the female connector 511 to ensure the contact reliability between the two. When disassembling the aperture projection device 10, it is only necessary to first reversely loosen the pressing sleeve 320 and then pull out the male connector 310.

[0057] See Figures 4 to 6 In some embodiments, the mounting structure includes a clamping jaw 410 and a first adjusting member 420 connected thereto. The clamping jaw 410 includes two clamping portions 411 rotatably connected thereto. The first adjusting member 420 is configured to adjust the degree of opening of the two clamping portions 411 .

[0058] Specifically, the mounting structure includes a mounting base 430, and two clamping portions 411 are rotatably connected to the mounting base 430. The two clamping portions 411 can rotate relative to the mounting base 430 to achieve opening and closing. The first adjustment member 420 can adjust the degree of opening of the two clamping portions 411 to clamp and secure the bed board 510, or to separate the clamping portions 411 from the bed board 510, thereby enabling the aperture projection device 10 to be assembled and disassembled.

[0059] See Figures 4 to 6 In some embodiments, the first adjusting member 420 includes an adjusting screw 421 and a nut. The adjusting screw 421 passes through the two clamping parts 411 in sequence and is threadedly connected to the nut.

[0060] Specifically, both clamping portions 411 are provided with through-holes, through which adjustment screws 421 pass through the two clamping portions 411 and are threadedly connected to nuts located outside the clamping portions 411. By tightening or loosening the nuts, the degree of opening and closing of the two clamping portions 411 can be adjusted. In other embodiments, the first adjustment member 420 can also be configured as a drive component such as a cylinder, which drives the two clamping portions 411 to rotate relative to each other to achieve opening and closing.

[0061] See Figures 4 to 6 In some embodiments, the mounting base 430 and the housing 100 are rotatably connected via a universal ball joint 440 .

[0062] Specifically, a spherical groove is provided within the mounting base 430. An extension rod 121 is connected to the housing 100. A universal ball joint 440 is connected to the end of the extension rod 121. The universal ball joint 440 is rotatably mounted within the spherical groove. By rotating the universal ball joint 440 within the spherical groove, the angle of the aperture projection device 10 relative to the bed plate 510 can be adjusted, thereby facilitating the optimal projection angle of the aperture projection device 10. In other embodiments, the positions of the universal ball joint 440 and the spherical groove may be interchanged.

[0063] See Figures 4 to 6 In some embodiments, the mounting structure includes a second adjusting member 450 connected to the mounting seat 430 , and the second adjusting member 450 is configured to movably abut against the universal ball head 440 .

[0064] Specifically, the second adjustment member 450 is a screw. The mounting base 430 has a threaded hole. The screw and the threaded hole are threadedly engaged, and the end of the screw abuts against the universal ball joint 440. By rotating the screw, the degree of contact between the screw and the universal ball joint 440 can be adjusted, thereby adjusting the friction force of the universal ball joint 440 rotating within the spherical groove. Once the angle is adjusted, tightening the screw will limit the aperture projection device 10 to the current angle.

[0065] See Figure 1 and Figure 4 A medical imaging system provided in one embodiment of the present application includes the aperture projection device 10 of any of the aforementioned embodiments, and further includes a scanning device 610 and a mounting member 500. The scanning device 610 has a scanning hole 611 for accommodating a patient. The aperture projection device 10 is detachably mounted on the mounting member 500 through a mounting structure, wherein the aperture projection device 10 is configured to project a projection pattern onto the inner wall of the scanning hole 611.

[0066] The scanning device 610 may be an X-ray system, a magnetic resonance imaging system, a computed tomography system, a positron emission tomography system, a radiotherapy system, or the like.

[0067] See Figure 1 and Figure 4 In some embodiments, the medical imaging system includes a data transmitter-receiver 620 disposed in the scanning room, and the data transmitter-receiver 620 is communicatively connected to the aperture projection device 10 .

[0068] Specifically, a power supply cabinet 660 is located within the scanning room. The data transmitter-receiver 620 is connected to the power supply cabinet 660 via a power cable 650, thereby providing power to the data transmitter-receiver 620. The data transmitter-receiver 620 is connected to a host computer 640 located outside the scanning room via a network cable 630, enabling data transmission. The host computer 640 can send data to the data transmitter-receiver 620, which then transmits the data to the aperture projection device 10 in communication therewith, thereby projecting the corresponding text, images, and videos.

[0069] See Figure 2 and Figure 5 In some embodiments, the aperture projection device 10 further includes components such as a distance sensor 220, a main control board 230, a speaker 240, a fan 250, a battery 260, an indicator light 270, and a switch button 280. The housing 100 includes a front housing 110 and a rear housing 120 that are fixedly connected, defining a mounting cavity 130 therebetween. The aforementioned components, such as the distance sensor 220, the main control board 230, the speaker 240, the fan 250, and the battery 260, are all mounted within the mounting cavity 130. When the patient bed is inserted into the scanning aperture 611 of the scanning device 610, the distance sensor 220 detects and scans the distance to the wall of the aperture 611, thereby adjusting the position of the aperture projection device 10 based on this distance to achieve a better projection effect. The main control board 230 is communicatively connected to the data receiver and transmitter 620 for receiving and transmitting data. The speaker 240 can also provide voice notifications. The front housing 110 and / or the rear housing 120 are provided with air inlets and outlets 111 to cooperate with the fan 250 to dissipate heat from the various electrical components of the aperture projection device 10, thereby maintaining them in optimal operating condition. A battery 260 can power the various electrical components of the aperture projection device 10. An indicator light 270 and a switch button 280 are both provided on the housing 100. The switch button 280 can be pressed to turn the aperture projection device 10 on or off. The indicator light 270 can be a battery indicator light, a signal status indicator light, etc.

[0070] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An aperture projection device (10), applied to a medical imaging system, characterized in that: The aperture projection device (10) comprises: A housing (100) having a mounting cavity (130); A projection light engine (210), installed in the installation cavity (130) and used for projecting a projection pattern; and The mounting structure is provided on the housing (100), and the projection device (10) is detachably connected to the component to be mounted (500) via the mounting structure.

2. The aperture projection device (10) according to claim 1, characterized in that The mounting structure comprises a male connector (310) and a compression sleeve (320) connected thereto; the male connector (310) and the female connector (511) in the part to be mounted (500) are in contact and conduction; the compression sleeve (320) and the part to be mounted (500) are connected and locked.

3. The aperture projection device (10) according to claim 2, characterized in that The compression sleeve (320) is sleeved on the outside of the male connector (310), and the two are rotatably connected. The compression sleeve (320) has an annular threaded section (321), and the compression sleeve (320) is threadedly connected to the part to be installed (500) via the threaded section (321).

4. The aperture projection device (10) according to claim 3, characterized in that The male connector (310) is connected to a concave or convex blocking portion (331), and the pressing sleeve (320) is provided with an abutting portion (322). When the pressing sleeve (320) is tightened to a preset position, the abutting portion (322) is blocked by the blocking portion (331).

5. The aperture projection device (10) according to claim 2, characterized in that The male-end connector (310) has a limiting portion (311) that is plugged into and matched with the female-end connector (511), and the limiting portion (311) is a convex block or a groove.

6. The aperture projection device (10) according to claim 1, characterized in that The mounting structure comprises a clamping jaw (410) and a first adjusting member (420) connected thereto, wherein the clamping jaw (410) comprises two rotatably connected clamping portions (411), and the first adjusting member (420) is configured to adjust the degree of opening of the two clamping portions (411).

7. The aperture projection device (10) according to claim 6, characterized in that The mounting structure comprises a mounting seat (430) connected to the clamping claw (410), and the mounting seat (430) and the housing (100) are rotatably connected via a universal ball head (440).

8. The aperture projection device (10) according to claim 7, characterized in that The mounting structure comprises a second adjusting member (450) connected to the mounting seat (430), and the second adjusting member (450) is configured to movably abut against the universal ball head (440).

9. A medical imaging system, characterized in that: The medical imaging system comprises the aperture projection device (10) according to any one of claims 1 to 8, and further comprises a scanning device (610) and the part to be mounted (500), wherein the scanning device (610) has a scanning hole (611) for accommodating a patient, and the aperture projection device (10) is detachably mounted on the part to be mounted (500) via the mounting structure, wherein the aperture projection device (10) is configured to project a projection pattern onto an inner wall of the scanning hole (611).

10. The medical imaging system according to claim 9, wherein: The medical imaging system comprises a data receiver-transmitter (620) arranged in a scanning room, and the data receiver-transmitter (620) is communicatively connected to the aperture projection device (10).

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