X-ray imaging apparatus
By introducing a field indicator unit into the X-ray imaging device, the visible laser light is emitted to display the X-ray projection range, which solves the problem of inaccurate judgment of doctors' experience and improves imaging quality and safety.
Patent Information
- Application Number
- CN202422052300.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-22
AI Technical Summary
During X-ray imaging, doctors rely on experience to judge the accuracy of the X-ray projection range, which cannot be guaranteed, which affects imaging quality and patient safety.
An X-ray imaging device is designed, equipped with a field indicator unit, and emit visible laser light propagates along the side of the conical X-ray irradiation field, and is used to display the boundary of the X-ray projection range on the body to be imaged, providing a projection range display that is visible to the naked eye.
Displaying the X-ray projection range through a visible way of the naked eye improves imaging quality and patient safety and reduces the difficulty of space layout.
Smart Images
Figure CN223111723U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical imaging, in particular to X-ray imaging equipment. Background Art
[0002] During the X-ray imaging process, it is particularly important to clarify the projection range of X-rays for the imaging quality and the safety of patients. Doctors usually rely on experience to judge and estimate the projection range of X-rays on patients. This method depends on the experience of doctors and the accuracy cannot be guaranteed. Content of the Utility Model
[0003] The purpose of the utility model is to provide an X-ray imaging device which can display the boundary of the projection range of X-rays on a patient in a visible way to the naked eye.
[0004] The utility model provides an X-ray imaging device, which includes an X-ray tube and a detector. The X-ray imaging device can form a conical X-ray irradiation field between the X-ray tube and the detector, wherein the height direction of the cone is parallel to the projection direction of the X-ray imaging device. The X-ray imaging device includes a field indication unit. The field indication unit can emit visible laser light that propagates along the side surface of the conical X-ray irradiation field and has the same or opposite propagation direction as that of the X-rays.
[0005] The field indication unit of the X-ray imaging device can emit visible laser light that propagates along the side surface of the conical X-ray irradiation field and has the same propagation direction as that of the X-rays. When the object to be imaged is placed in the X-ray irradiation field, the field indication unit can project a visible light spot on the object to be imaged, and the visible light spot is located at the boundary of the projection range of the X-rays on the object to be imaged. Thus, the X-ray imaging device can display the boundary of the projection range of the X-rays on the object to be imaged in a visible way to the naked eye.
[0006] In another schematic embodiment of the X-ray imaging device, the X-ray imaging device further includes a transmitting end support body and a detecting end support body. The transmitting end support body and the detecting end support body are arranged opposite to each other along the projection direction. The X-ray tube is installed on the transmitting end support body. The detector and the field indication unit are installed on the detecting end support body. The field indication unit can emit visible laser light that propagates along the side surface of the conical X-ray irradiation field and has the opposite propagation direction as that of the X-rays. This is beneficial to reducing the difficulty of spatial arrangement.
[0007] In still another schematic embodiment of the X-ray imaging device, the field indication unit is arranged to be able to project a visible light spot showing the contour of a cross-section on the plane where any cross-section in the set height area of the X-ray irradiation field is located. Thus, the contour of the projection range of the X-rays on the object to be imaged can be displayed in a visible way to the naked eye.
[0008] In still another exemplary embodiment of the X-ray imaging device, the visible light spot is a rectangular pattern composed of four linear light spots. The radiation field indicating unit includes two laser indicators. The visible laser emitted by one of the laser indicators is used to form linear light spots corresponding to two adjacent sides of the rectangular pattern, and the visible laser emitted by the other laser indicator is used to form linear light spots corresponding to the other two adjacent sides of the rectangular pattern.
[0009] In still another exemplary embodiment of the X-ray imaging device, the visible light spot is a rectangular pattern composed of four linear light spots. The radiation field indicating unit includes four laser indicators. The visible lasers emitted by the four laser indicators are respectively used to form four linear light spots.
[0010] In still another exemplary embodiment of the X-ray imaging device, the detection end support body includes a main bracket, a first rotating frame and a second rotating frame. The detector is installed on the main bracket. The first rotating frame is rotatably connected to the main bracket about a first axis, where the first axis is perpendicular to the projection direction. The second rotating frame is rotatably connected to the first rotating frame about a second axis, where the second axis is perpendicular to the first axis. The laser indicator is movably connected to the second rotating frame along a moving direction and the opposite direction of the moving direction to adjust the position of the laser indicator relative to the second rotating frame in the projection direction. This facilitates adjusting the position and angle of the laser indicator.
[0011] In still another exemplary embodiment of the X-ray imaging device, the first rotating frame has a first circular hole and a first long hole. The detection end support body further includes a first bolt and a second bolt. The first bolt passes through the first circular hole along a direction parallel to the first axis and is then threadedly connected to the main bracket. The second bolt passes through the first long hole along a direction parallel to the first axis and is then threadedly connected to the main bracket. The first rotating frame can rotate relative to the main bracket with the first bolt as the axis, and the second bolt moves in the first long hole during the rotation. The relative position of the main bracket and the first rotating frame can be fixed by tightening the first bolt and the second bolt. This structure is simple and convenient for adjustment.
[0012] In still another exemplary embodiment of the X-ray imaging device, the second rotating frame has a second circular hole and a second long hole. The detection end support body further includes a third bolt and a fourth bolt. The third bolt passes through the second circular hole along a direction parallel to the second axis and is then threadedly connected to the first rotating frame. The fourth bolt passes through the second long hole along a direction parallel to the second axis and is then threadedly connected to the first rotating frame. The second rotating frame can rotate relative to the first rotating frame with the third bolt as the axis, and the fourth bolt moves in the second long hole during the rotation. The relative position of the first rotating frame and the second rotating frame can be fixed by tightening the third bolt and the fourth bolt. This structure is simple and convenient for adjustment.
[0013] In still another exemplary embodiment of the X-ray imaging device, the second rotating frame includes two clamping arms. Each clamping arm has a fixed end and a free end. The two clamping arms are arranged opposite to each other along a direction parallel to the second axis. The fixed ends of the two clamping arms are fixedly connected. The two clamping arms enclose a slideway extending along the moving direction. The slideway is located between the fixed end and the free end. The laser indicator is inserted into the slideway and can slide within the slideway along the moving direction and the opposite direction of the moving direction. The second circular hole penetrates through the fixed ends of the two clamping arms. The second long hole penetrates through the free ends of the two clamping arms. By tightening the fourth bolt, the two clamping arms can clamp the laser indicator, thereby fixing the relative positions of the second rotating frame and the laser indicator. This structure is simple and convenient for adjustment.
[0014] In still another exemplary embodiment of the X-ray imaging device, the field-of-view indicating unit is further arranged to be able to project a marking pattern on the plane of any cross-section within the set height region of the X-ray irradiation field. The marking pattern can be used by the user to judge the direction.
[0015] In still another exemplary embodiment of the X-ray imaging device, the X-ray imaging device is a C-arm X-ray imaging device. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The following drawings only schematically illustrate and explain the present invention and do not limit the scope of the present invention.
[0017] Figure 1 It is a schematic diagram of a partial structure of an exemplary embodiment of the X-ray imaging device.
[0018] Figure 2 For explaining the installation positions of the X-ray tube and the detector of the X-ray imaging device.
[0019] Figure 3 It is a schematic diagram of a partial structure of the X-ray imaging device.
[0020] Figure 4 For displaying the visible laser emitted by the field-of-view indicating unit.
[0021] Figure 5 Exemplarily shows four forms of the visible light spots projected by the field-of-view indicating unit.
[0022] Figure 6 It is a schematic diagram of a partial structure of the X-ray imaging device.
[0023] Figure 7 For Figure 6 partial enlarged view of
[0024] Figure 8 For Figure 7 stereogram of the structure shown in
[0025] Figure 9 For displaying two rotational positions of the first rotating frame relative to the main bracket.
[0026] Figure 10 For displaying two rotational positions of the second rotating frame relative to the first rotating frame.
[0027] Figure 11 Shows an exploded view of the second rotating frame, the third bolt, and the fourth bolt.
[0028] Label description
[0029] 10 Tube
[0030] 20 Detector
[0031] 30 Radiation field indicating unit
[0032] 31 Laser indicator
[0033] 40 Transmitting end support body
[0034] 50 Detection end support body
[0035] 51 Main bracket
[0036] 53 First rotating frame
[0037] 531 First circular hole
[0038] 532 First long hole
[0039] 54 Second rotating frame
[0040] 541 Second circular hole
[0041] 542 Second long hole
[0042] 544 Clamping arm
[0043] F1 Fixed end
[0044] F2 Free end
[0045] 545 Slideway
[0046] B1 First bolt
[0047] B2 Second bolt
[0048] B3 Third bolt
[0049] B4 Fourth bolt
[0050] 70 X-ray irradiation field
[0051] T Projection direction
[0052] 80 Visible laser
[0053] L1 First axis
[0054] L2 Second axis
[0055] M Moving direction Detailed implementation manners
[0056] For a clearer understanding of the technical features, objectives and effects of the utility model, the following describes the detailed implementation manners of the utility model with reference to the accompanying drawings. In the drawings, the same reference numerals denote components with the same or similar structures and the same functions.
[0057] In this document, "schematic" means "serving as an example, instance or illustration". Any illustration or implementation manner described as "schematic" in this document should not be construed as a more preferred or advantageous technical solution.
[0058] In this document, "first", "second", etc. do not indicate their importance or order, etc., but are only used to indicate the differences from each other for the convenience of document description.
[0059] For the sake of simplicity of the drawings, only the parts related to the utility model are schematically shown in each drawing, and they do not represent the actual structure of the product.
[0060] Figure 1 It is a schematic diagram of a partial structure of a schematic implementation manner of an X-ray imaging device. In this schematic implementation manner, the X-ray imaging device is a C-arm X-ray imaging device. The C-arm X-ray imaging device is, for example, a mobile C-arm X-ray imaging device or a digital subtraction angiography (DSA) machine, but is not limited thereto. In other schematic implementation manners, the X-ray imaging device may also be other types of X-ray imaging devices, such as, but not limited to, other types of X-ray machines.
[0061] As Figure 1 shown, the X-ray imaging device includes a transmitting-end support main body 40 and a detecting-end support main body 50. The transmitting-end support main body 40 and the detecting-end support main body 50 are oppositely arranged along the projection direction T of the X-ray imaging device. The projection direction T is perpendicular to the detection plane of the X-ray imaging device. Figure 2 For explaining the installation positions of the X-ray tube 10 and the detector 20 of the X-ray imaging device. As Figure 2 shown, the X-ray tube 10 of the X-ray imaging device is installed on the transmitting-end support main body 40. The detector 20 of the X-ray imaging device is installed on the detecting-end support main body 50.
[0062] As Figure 1 and Figure 2 shown, the X-ray imaging device can form a conical X-ray irradiation field 70 between the X-ray tube 10 and the detector 20, wherein the height direction of the cone is parallel to the projection direction T.
[0063] Figure 3It is a schematic diagram of the partial structure of an X-ray imaging device. To show the internal structure, Figure 3 the lower housing of the detection end support body 50 is removed in Figure 3 the figure. As
[0064] shown, the X-ray imaging device further includes a field-of-view indication unit 30. In this exemplary embodiment, the field-of-view indication unit 30 is installed on the detection end support body 50, and the field-of-view indication unit 30 is, for example, disposed within the housing of the detection end support body 50. However, it is not limited thereto. In other exemplary embodiments, the field-of-view indication unit 30 may also be installed on the emission end support body 40 or other structures of the X-ray imaging device. Installing the field-of-view indication unit 30 on the detection end support body 50 or the emission end support body 40 can make the overall structure more compact. Since the detection end support body 50 is located at the divergent end of the X-ray irradiation field 70, there is more space to install the field-of-view indication unit 30, thereby facilitating the reduction of the difficulty of space layout. Figure 3 As Figure 4 shown, the field-of-view indication unit 30 can emit visible laser light 80 that propagates along the side surface of the conical X-ray irradiation field 70 and is opposite to the propagation direction of the X-ray.
[0065] In this exemplary embodiment, since the field-of-view indication unit 30 is installed on the detection end support body 50, the propagation direction of the visible laser light 80 emitted by the field-of-view indication unit 30 needs to be opposite to the propagation direction of the X-ray. It can be understood that in other exemplary embodiments, if the field-of-view indication unit 30 is installed on the emission end support body 40, the propagation direction of the visible laser light 80 emitted by the field-of-view indication unit 30 should be the same as the propagation direction of the X-ray. Here, "the same propagation direction" means that the X-ray and the visible laser light have the same propagation direction at any overlapping position.
[0066] The field-of-view indication unit of this X-ray imaging device can emit visible laser light that propagates along the side surface of the conical X-ray irradiation field and is parallel to the propagation direction of the X-ray. When the object to be imaged is placed in the X-ray irradiation field, the field-of-view indication unit can project a visible light spot on the object to be imaged, and the visible light spot is located at the boundary of the projection range of the X-ray on the object to be imaged. Thereby, this X-ray imaging device can visually display the boundary of the projection range of the X-ray on the object to be imaged. The boundary can be a partial boundary of the projection range or can be the entire boundary of the projection range.
[0067] In a schematic embodiment, the radiation field indicating unit 30 is arranged to be able to project a visible light spot showing the contour of a cross-section on the plane of any cross-section within the set height region of the X-ray irradiation field 70. The set height region is, for example, the height region where the surface of the object to be imaged for receiving the projection of the radiation field indicating unit is located. The range of the set height region can be adjusted as needed. Thereby, the contour of the projection range of the X-ray on the object to be imaged can be displayed in a visible manner to the naked eye. In this article, the boundary is defined as at least a part of the contour.
[0068] As Figure 1 shown, in a schematic embodiment, the X-ray irradiation field 70 is, for example, in the shape of a quadrangular pyramid. Figure 5 Exemplarily shown are four forms of the visible light spot projected by the radiation field indicating unit 30 on the plane of a cross-section within the set height region of the X-ray irradiation field 70 (it should be noted that the numbers and letters shown in the figure do not belong to the part of the visible light spot mentioned here). As Figure 5 shown, the visible light spot is a rectangular pattern composed of four linear light spots. As Figure 5 shown at A in
[0069] Figure 6 is a schematic diagram of a partial structure of an X-ray imaging device. As Figure 6 shown, the radiation field indicating unit 30 includes two laser indicators 31. The visible laser 80 emitted by one of the laser indicators 31 is used to form linear light spots corresponding to two adjacent sides of the rectangular pattern, and the visible laser 80 emitted by the other laser indicator 31 is used to form linear light spots corresponding to the other two adjacent sides of the rectangular pattern. These two laser indicators 31 are, for example, respectively arranged at two diagonal corners of the detector 20. However, it is not limited thereto. In other schematic embodiments, the radiation field indicating unit 30 may, for example, include four laser indicators 31. The visible lasers 80 emitted by the four laser indicators 31 are respectively used to form four linear light spots, and these four laser indicators 31 are, for example, respectively arranged at the four corners of the detector 20.
[0070] As Figure 6 shown, in a schematic embodiment, the detection end support main body 50 includes a main bracket 51, a first rotating frame 53, and a second rotating frame 54. In this schematic embodiment, the detection end support main body 50 may, for example, further include a housing ( Figure 6 not shown in Figure 3 ). As Figure 7 shown, the detector 20 is installed on the main bracket 51. Figure 6 is a partial enlarged view of Figure 7As shown, the first rotating frame 53 is rotatably connected to the main support 51 around a first axis L1, wherein the first axis L1 is perpendicular to the projection direction T. The second rotating frame 54 is rotatably connected to the first rotating frame 53 around a second axis L2, wherein the second axis L2 is perpendicular to the first axis L1. Figure 8 for Figure 7 A three-dimensional diagram of the structure shown. Figure 8 As shown, the laser pointer 31 is movably connected to the second rotating frame 54 along a moving direction M and the opposite direction of the moving direction M to adjust the position of the laser pointer 31 relative to the second rotating frame 54 in the projection direction T. This facilitates the adjustment of the position and angle of the laser pointer.
[0071] Figure 9 The two figures in FIG. 5 show two rotation positions of the first rotating frame 53 relative to the main support 51. Figure 9 As shown, in the present schematic embodiment, the first rotating frame 53 has a first circular hole 531 and a first long hole 532. The detection end support body 50 also includes a first bolt B1 and a second bolt B2. The first bolt B1 passes through the first circular hole 531 in a direction parallel to the first axis L1 and is threadedly connected to the main bracket 51. The second bolt B2 passes through the first long hole 532 in a direction parallel to the first axis L1 and is threadedly connected to the main bracket 51. The first rotating frame 53 can rotate relative to the main bracket 51 with the first bolt B1 as the axis, and the second bolt B2 moves in the first long hole 532 during the rotation. The relative positions of the main bracket 51 and the first rotating frame 53 can be fixed by tightening the first bolt B1 and the second bolt B2. The structure is simple and easy to adjust.
[0072] Figure 10 The two figures in FIG. 5 show two rotation positions of the second rotating frame 54 relative to the first rotating frame 53, and the section positions are as follows: Figure 7 As shown in XX. Figure 10 As shown, in the present exemplary embodiment, the second rotating frame 54 has a second circular hole 541 and a second long hole 542. The detection end support body 50 also includes a third bolt B3 and a fourth bolt B4. The third bolt B3 passes through the second circular hole 541 in a direction parallel to the second axis L2 and is threadedly connected to the first rotating frame 53. The fourth bolt B4 passes through the second long hole 542 in a direction parallel to the second axis L2 and is threadedly connected to the first rotating frame 53. The second rotating frame 54 can rotate relative to the first rotating frame 53 with the third bolt B3 as the axis, and the fourth bolt B4 moves in the second long hole 542 during the rotation. The relative positions of the first rotating frame 53 and the second rotating frame 54 can be fixed by tightening the third bolt B3 and the fourth bolt B4. The structure is simple and easy to adjust.
[0073] Figure 11Shows an exploded view of the second rotating frame 54, the third bolt B3, and the fourth bolt B4. As Figure 11 shown, in this exemplary embodiment, the second rotating frame 54 includes two clamping arms 544. Each clamping arm 544 has a fixed end F1 and a free end F2. The two clamping arms 544 are arranged opposite to each other in a direction parallel to the second axis L2. The fixed ends F1 of the two clamping arms 544 are fixedly connected. The two clamping arms 544 enclose a slideway 545 extending in the moving direction M. The slideway 545 is located between the fixed end F1 and the free end F2. As Figure 8 shown, the laser indicator 31 is inserted into the slideway 545 and can slide within the slideway 545 along the moving direction M and the opposite direction of the moving direction M. The second circular hole 541 penetrates through the fixed ends F1 of the two clamping arms 544. The second long hole 542 penetrates through the free ends F2 of the two clamping arms 544. By tightening the fourth bolt B4, the two clamping arms 544 can clamp the laser indicator 31, thereby fixing the relative positions of the second rotating frame 54 and the laser indicator 31. This structure is simple and convenient for adjustment.
[0074] As Figure 5 shown in B, C, and D, in the exemplary embodiment, the radiation field indicating unit 30 is further arranged to be able to project a marking pattern on the plane of any cross-section within the set height area of the X-ray irradiation field 70. The marking pattern is, for example, text, symbols, numbers, etc., which are, for example, used for the user to judge the direction. For example, as Figure 5 shown in B, the marking pattern includes the markings Up or abbreviation U (above), Left or abbreviation L (left), Down or abbreviation D (below), Right or abbreviation R (right) for characterizing azimuth information. As Figure 5 shown in C, the marking pattern includes the markings North or abbreviation N (north), West or abbreviation W (west), South or abbreviation S (south), East or abbreviation E (east) for characterizing direction information. As Figure 5 shown in D, the marking pattern can also be digital information, such as Arabic numerals 1, 2, 3, 4 or Roman numerals I, II, III, IV, etc.
[0075] It should be understood that although this specification is described according to each embodiment, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0076] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present utility model, and they are not intended to limit the protection scope of the present utility model. Any equivalent implementation schemes or changes made without departing from the technical spirit of the present utility model, such as the combination, division or repetition of features, shall be included within the protection scope of the present utility model.
Claims
1. An X-ray imaging device, comprising an X-ray tube (10) and a detector (20), and capable of forming a conical X-ray irradiation field (70) between the X-ray tube (10) and the detector (20), wherein the height direction of the cone is parallel to the projection direction (T) of the X-ray imaging device, characterized in that, The X-ray imaging device includes a field indication unit (30), and the field indication unit (30) is capable of emitting a visible laser (80) that propagates along the side surface of the conical X-ray irradiation field (70) and has the same or opposite direction as the propagation direction of the X-ray.
2. The X-ray imaging device according to claim 1, wherein The X-ray imaging device further includes a transmitting-end support body (40) and a detecting-end support body (50). The transmitting-end support body (40) and the detecting-end support body (50) are oppositely arranged along the projection direction (T). The X-ray tube (10) is installed on the transmitting-end support body (40), and the detector (20) and the field indication unit (30) are installed on the detecting-end support body (50). The field indication unit (30) is capable of emitting a visible laser (80) that propagates along the side surface of the conical X-ray irradiation field (70) and has the opposite direction as the propagation direction of the X-ray.
3. The X-ray imaging device according to claim 2, wherein The field indication unit (30) is arranged to be capable of projecting a visible light spot showing the contour of a cross-section on the plane of any cross-section within the set height area of the X-ray irradiation field (70).
4. The X-ray imaging device according to claim 3, characterized in that, The visible light spot is a rectangular pattern composed of four linear light spots. The field indication unit (30) includes two laser indicators (31). The visible laser (80) emitted by one of the laser indicators (31) is used to form the linear light spots corresponding to two adjacent sides of the rectangular pattern, and the visible laser (80) emitted by the other laser indicator (31) is used to form the linear light spots corresponding to the other two adjacent sides of the rectangular pattern.
5. The X-ray imaging device according to claim 3, characterized in that, The visible light spot is a rectangular pattern composed of four linear light spots. The field indication unit (30) includes four laser indicators (31), and the visible lasers (80) emitted by the four laser indicators (31) are respectively used to form the four linear light spots.
6. The X-ray imaging device according to claim 4 or 5, characterized in that, The detecting-end support body (50) includes: a main bracket (51), and the detector (20) is installed on the main bracket (51); a first rotating frame (53) rotatably connected to the main bracket (51) about a first axis (L1), and the first axis (L1) is perpendicular to the projection direction (T); and a second rotating frame (54) rotatably connected to the first rotating frame (53) about a second axis (L2), and the second axis (L2) is perpendicular to the first axis (L1). The laser indicator (31) is movably connected to the second rotating frame (54) along a moving direction (M) and the opposite direction of the moving direction (M) to adjust the position of the laser indicator (31) relative to the second rotating frame (54) in the projection direction (T).
7. The X-ray imaging device according to claim 6, wherein, The first rotating frame (53) has a first circular hole (531) and a first elongated hole (532). The detection end support body (50) further includes a first bolt (B1) and a second bolt (B2). The first bolt (B1) passes through the first circular hole (531) in a direction parallel to the first axis (L1) and is then threadedly connected to the main bracket (51). The second bolt (B2) passes through the first elongated hole (532) in a direction parallel to the first axis (L1) and is then threadedly connected to the main bracket (51). The first rotating frame (53) can rotate relative to the main bracket (51) with the first bolt (B1) as the axis. During the rotation, the second bolt (B2) moves within the first elongated hole (532). By tightening the first bolt (B1) and the second bolt (B2), the relative positions of the main bracket (51) and the first rotating frame (53) can be fixed.
8. The X-ray imaging device according to claim 6, wherein The second rotating frame (54) has a second circular hole (541) and a second elongated hole (542). The detection end support body (50) further includes a third bolt (B3) and a fourth bolt (B4). The third bolt (B3) passes through the second circular hole (541) in a direction parallel to the second axis (L2) and is then threadedly connected to the first rotating frame (53). The fourth bolt (B4) passes through the second elongated hole (542) in a direction parallel to the second axis (L2) and is then threadedly connected to the first rotating frame (53). The second rotating frame (54) can rotate relative to the first rotating frame (53) with the third bolt (B3) as the axis. During the rotation, the fourth bolt (B4) moves within the second elongated hole (542). By tightening the third bolt (B3) and the fourth bolt (B4), the relative positions of the first rotating frame (53) and the second rotating frame (54) can be fixed.
9. The X-ray imaging device according to claim 8, characterized in that, The second rotating frame (54) includes two clamping arms (544). Each clamping arm (544) has a fixed end (F1) and a free end (F2). The two clamping arms (544) are arranged opposite to each other along a direction parallel to the second axis (L2). The fixed ends (F1) of the two clamping arms (544) are fixedly connected. The two clamping arms (544) enclose a slideway (545) extending along the moving direction (M). The slideway (545) is located between the fixed end (F1) and the free end (F2). The laser indicator (31) is inserted into the slideway (545) and can slide in the slideway (545) along the moving direction (M) and the opposite direction of the moving direction (M). The second circular hole (541) penetrates through the fixed ends (F1) of the two clamping arms (544). The second long hole (542) penetrates through the free ends (F2) of the two clamping arms (544). By tightening the fourth bolt (B4), the two clamping arms (544) can clamp the laser indicator (31), thereby fixing the relative positions of the second rotating frame (54) and the laser indicator (31).
10. The X-ray imaging device according to claim 1, characterized in that, The radiation field indicating unit (30) is further configured to be able to project a marking pattern on the plane where any cross-section in the set height area of the X-ray irradiation field (70) is located.
11. The X-ray imaging device according to claim 1, characterized in that, The X-ray imaging device is a C-arm X-ray imaging device.