Alignment device, alignment system and alignment method for medical imaging

Abstract

The present application relates to the technical field of medical imaging equipment, in particular to an alignment device, an alignment system and an alignment method for medical imaging, the alignment device is arranged on a first imaging device, the alignment device comprises a first alignment mechanism and a second alignment mechanism, the first alignment mechanism has a horizontal laser slit and a vertical laser slit. The first alignment mechanism can emit laser towards the horizontal laser slit and the vertical laser slit, and the laser can form a horizontal ray plane and a vertical ray plane through the horizontal laser slit and the vertical laser slit. The second alignment mechanism comprises a rectangular pressure touch film with cross lines. By adjusting the second imaging device, the horizontal ray plane / vertical ray plane is coincided with the corresponding reference line of the rectangular pressure touch film respectively. The scanning bed is adjusted to be aligned with the alignment device, and the influence of patient positioning deviation is eliminated. The alignment is more direct and accurate, the rework caused by alignment failure is less, the manual and installation time is saved, the alignment precision is higher, and the subsequent image fusion is more beneficial.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical imaging equipment, in particular to an alignment device, an alignment system and an alignment method for medical imaging. BACKGROUND

[0002] Single-Photon emission computed tomography (second imaging device) is a nuclear medical imaging technology, which reflects the physiological function and metabolic condition of organs or tissues by detecting the distribution of radioactive drugs in the body. Computed Tomography (first imaging device) is a technology that combines electronic computers with X-ray examination, uses the different attenuation coefficients of different tissues in the human body to make the signals received by the detector different, and reconstructs the tomographic image of the human body.

[0003] The second imaging device / first imaging device organically combines the second imaging device and the first imaging device together, uses the same scanning bed and the same image processing workstation, and forms a second imaging device / first imaging device fusion image through image reconstruction fusion technology of the second imaging device image and the first imaging device image. Once the image is displayed, the pathological and physiological changes and morphological structure of the lesion can be reflected at the same time, the advantages are complementary, and the sensitivity, accuracy, specificity and positioning accuracy are high.

[0004] The current second imaging device / first imaging device is designed to have a scanning bed, a second imaging device and a first imaging device arranged in the axial direction of the first imaging device in sequence, i.e. the second imaging device is between the first imaging device and the scanning bed, the two machine axes coincide, and the longitudinal plane of the scanning bed coincides with the machine axis. In order to realize better fusion of the second imaging device image and the first imaging device image, it is necessary to ensure high-precision alignment of the physical installation positions of the second imaging device, the first imaging device and the scanning bed. In the prior art, the alignment of the two machine racks is mainly achieved by laying a foot template on the ground and indirectly determining the spatial position of the machine rack through the fixed points on the ground. This method requires very high accuracy of the installation hole position on the ground and needs experienced and skilled operators. If there is a large deviation in one of the holes, all installation positions need to be re-punched to avoid this hole. Once the operator is a novice or the punching position deviates, the axial coincidence degree of the second imaging device and the first imaging device is low, which ultimately leads to an unsatisfactory mechanical alignment result, and repeated adjustment is needed in the later stage, resulting in poor alignment effect of the two machine racks and further leading to an unsatisfactory alignment effect. SUMMARY

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present application provides an alignment device, an alignment system and an alignment method for medical imaging, which solve the technical problem that the alignment of two gantries may result in poor alignment effect, repeated adjustment and thus unsatisfactory alignment effect. Meanwhile, the alignment of a scanning bed and the two gantries is increased to ensure that the patient is in a consistent positioning state during two scans.

[0006] In order to achieve the above-mentioned purposes, the main technical solutions adopted by the present application include:

[0007] In one aspect, the present application provides an alignment device for medical imaging, which is arranged on a first imaging device. The alignment device comprises a first alignment mechanism connected to the first imaging device, and the first alignment mechanism is detachably connected to a ring-shaped end surface of the first imaging device away from a second imaging device and forms two contact points with the connection part of the first imaging device. The connection line of the two contact points can pass through the center of the ring-shaped end surface of the first imaging device. The first alignment mechanism has a horizontal laser slit and a vertical laser slit.

[0008] The first alignment mechanism can emit laser light towards the horizontal laser slit and the vertical laser slit, and the laser light can form a horizontal ray plane and a vertical ray plane through the horizontal laser slit and the vertical laser slit. The two ray planes intersect to form an axis of the first imaging device.

[0009] The alignment device further comprises a second alignment mechanism capable of aligning the axis of the second imaging device with the axis of the first imaging device.

[0010] The second alignment mechanism comprises a rectangular pressure touch film adhered to the opposite end surface of the probe, and two reference lines in a cross shape are arranged on the pressure touch film. The intersection of the two reference lines is the midpoint of the rectangular pressure touch film.

[0011] The second imaging device is adjusted so that the horizontal ray plane / vertical ray plane respectively coincides with the corresponding reference line of the rectangular pressure touch film.

[0012] Optionally, the first alignment mechanism comprises a positioning plate detachably connected to the first imaging device at both ends, and a mounting plate connected to the positioning plate.

[0013] The mounting plate is arranged on the side of the positioning plate away from the second imaging device, and a laser emitter is arranged on the mounting plate.

[0014] The positioning plate is provided with a first horizontal laser slit and a first vertical laser slit perpendicular to each other.

[0015] Optionally, the first imaging device is provided with two mounting interfaces, and the axis connecting line of the two mounting interfaces can pass through the center of the annular end face of the first imaging device.

[0016] Optionally, the first alignment mechanism further comprises an alignment plate connected to the positioning plate, the alignment plate is parallel to the positioning plate, and the alignment plate is provided with a second horizontal laser slit and a second vertical laser slit corresponding to the first horizontal laser slit and the first vertical laser slit on the positioning plate.

[0017] The laser emitter can emit laser light towards the side of the second imaging device through the first horizontal laser slit and the second horizontal laser slit and the first vertical laser slit and the second vertical laser slit, forming the axis of the first imaging device.

[0018] Optionally, the alignment plate and the positioning plate are connected by two connecting rods arranged in parallel to each other.

[0019] Optionally, the second imaging device is provided with two probes which are centrally symmetric relative to the axis of the second imaging device, and the two probes can rotate relative to the circumference of the second imaging device, the rectangular pressure touch film is laid on the probes, and the size of the rectangular pressure touch film is the same as the size of the end face of the probes.

[0020] Optionally, the first imaging device is CT or PET, and the second imaging device is SPECT.

[0021] In another aspect, an alignment system comprises the alignment device for medical imaging, the first imaging device, the second imaging device and the scanning bed.

[0022] The scanning bed can be aligned with the first imaging device and the second imaging device after alignment.

[0023] Optionally, the scanning bed is provided with a first center line and a second center line arranged opposite to each other along the longitudinal direction of the scanning bed, and the first center line is located on the side close to the second imaging device.

[0024] In still another aspect, an alignment method comprises the alignment system, and the alignment method comprises the following steps:

[0025] S1, mounting the first imaging device at a specified position, adjusting the first imaging device to be horizontal and rotating the assembly to be vertical;

[0026] S2, fixing the alignment device on the rotating assembly of the first imaging device through the mounting interfaces;

[0027] S3, open the switch of the laser emitter, adjust the horizontal ray emitted by the laser emitter to form a horizontal ray plane through the horizontal laser slit, and adjust the vertical ray emitted by the laser emitter to form a vertical ray plane through the vertical laser slit;

[0028] S4, pre-install and power on the second imaging device, and control the two probes on the second imaging device to move to the 3 o'clock and 9 o'clock positions respectively;

[0029] S5, adjust the second imaging device in S4 so that the horizontal ray plane of the laser coincides with the transverse reference line of the cross intersection of the rectangular pressure touch film of the two probes;

[0030] S6, control the two probes of the second imaging device to move to the 6 o'clock and 12 o'clock positions respectively;

[0031] S7, adjust the second imaging device in S6 so that the vertical ray plane of the laser coincides with the transverse reference line of the cross intersection of the rectangular pressure touch film of the two probes;

[0032] S8, pre-install the scanning bed, and adjust the first and second center lines of the scanning bed to coincide with the vertical ray plane of the laser emitter;

[0033] S9, after alignment, fix the second imaging device and the scanning bed.

[0034] The beneficial effects of the present application are: the alignment device, the alignment system and the alignment method for medical imaging, by opening the first alignment mechanism detachably connected on the first imaging device to emit laser and form a horizontal ray plane and a vertical ray plane through the horizontal laser slit and the vertical laser slit, the intersection of the two ray planes is the axis of the first imaging device, after determining the axis of the first imaging device, the reference line of the rectangular pressure touch film of the second alignment mechanism is aligned with the horizontal ray plane / vertical ray plane respectively, to perform two-step alignment method to coincide the axis of the second imaging device with the constructed axis of the first imaging device, so that the second imaging device is connected to the first imaging device, and finally the scanning bed is aligned with the two racks to eliminate the influence of patient positioning deviation. The alignment device is simple to operate, convenient to use, more direct and accurate in alignment, less rework caused by alignment failure, saves labor and installation time, has higher alignment accuracy, and is more conducive to subsequent image fusion. The traditional purification equipment is solved the problem of troublesome disassembly and assembly during cleaning, and the labor cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a schematic diagram of the three-dimensional structure of the alignment system of the present application;

[0036] Figure 2 is Figure 1A partial cross-sectional view of the first imaging device and the alignment device in the middle;

[0037] Figure 3 for Figure 1 A three-dimensional structural diagram of the alignment device;

[0038] Figure 4 yes Figure 1 The first alignment of the second imaging device, the first imaging device, and the scanning bed;

[0039] Figure 5 yes Figure 1 Secondary alignment of the second imaging device, the first imaging device, and the scanning bed.

[0040] Explanation of reference numerals in the attached figures

[0041] 100: First imaging device; 101: Mounting interface; 102: Scanning center axis of the first imaging device; 103: Rotating component;

[0042] 200: Alignment device; 1: First alignment mechanism; 11: Positioning plate; 111: First horizontal laser slit; 112: First vertical laser slit; 12: Mounting plate; 13: Laser emitter; 14: Alignment plate; 141: Second horizontal laser slit; 142: Second vertical laser slit; 15: Connecting rod; 16: Center hole; 2: Second alignment mechanism; 21: Rectangular pressure contact film; 211: Lateral reference line;

[0043] 3: Horizontal ray surface; 4: Vertical ray surface;

[0044] 300: Second imaging device; 301: Probe; 302: Scanning center axis of the second imaging device;

[0045] 400: Scanning bed; 401: First center line; 402: Second center line; 403: Longitudinal section of the center of the scanning bed. Detailed Implementation

[0046] To better explain and facilitate understanding of the present invention, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Figure 1 The position of the first imaging device 100 relative to the second imaging device 300 is defined as "front"; Figure 1 The positions of the two probes 301 relative to the second imaging device 300 are defined as the "3 o'clock" and "9 o'clock" positions; Figure 1 Line segment 102 is defined as the "scanning center axis of the first imaging device"; Figure 1 Line segment 302 is defined as the "scanning center axis of the second imaging device"; Figure 1 The plane containing 403 is defined as "scanning bed center longitudinal section 403".

[0047] Referring to Figures 1-5 As shown in the figure, the alignment system proposed by the embodiment of the application comprises an alignment device for medical imaging, a first imaging device 100, a second imaging device 300 and a scanning bed 400.

[0048] The scanning bed 400 can be aligned with the first imaging device 100 and the second imaging device 300 after alignment.

[0049] It should be noted that in the embodiment, the first imaging device 100 and the second imaging device 300 are aligned by using the alignment mechanism before the alignment of the scanning bed 400. Moreover, the physical installation position precision requirement in the implementation stage is achieved. The components that need to be aligned include the first imaging device 100, the second imaging device 300 and the scanning bed 400. According to the physical structure of each component, the set virtual alignment elements include the first imaging device scanning center axis 102, the second imaging device scanning center axis 302 and the scanning bed center longitudinal section 403.

[0050] The alignment device 200 is arranged on the first imaging device, and the alignment device 200 comprises a first alignment mechanism 1 connected with the first imaging device 100. The first alignment mechanism 1 is detachably connected to the annular end surface of the first imaging device 100 away from the second imaging device 300 and forms two contact points with the connection position of the first imaging device 100. The connection line of the two contact points can pass through the center of the annular end surface of the first imaging device 100. The first alignment mechanism 1 has a horizontal laser seam and a vertical laser seam.

[0051] Further, the first alignment mechanism 1 comprises a positioning plate 11 detachably connected with the first imaging device 100 through bolts at both ends, and a mounting plate 12 connected with the positioning plate 11. The mounting plate 12 is arranged on the side of the positioning plate 11 away from the second imaging device 300, and the mounting plate 12 is provided with a laser emitter 13.

[0052] Further, the first imaging device 100 is provided with two mounting interfaces 101, and the axis connection line of the two mounting interfaces 101 can pass through the center of the annular end surface of the first imaging device 100.

[0053] Here, the positioning plate 11 is provided with a first horizontal laser slit 111 and a first vertical laser slit 112 which are perpendicular to each other. Before determining the axis of the first imaging device, it is necessary to ensure that the horizontal and rotational components 103 of the first imaging device 100 are adjusted to the vertical position. To ensure that the scanning central axis 102 of the first imaging device coincides with the rotational center of the first imaging device 100, the mounting interface 101 of the first imaging device 100 is designed to align with the center of the alignment device 200, and the center of the alignment device 200 coincides with the rotational center of the first imaging device 100. In this way, the determined simulation central axis 102 is accurate.

[0054] Specifically, first, the scanning central axis 102 of the first imaging device 100 needs to be found, and the scanning central axis 302 of the second imaging device 300 is aligned with the scanning central axis 102 as a reference, and the scanning bed central longitudinal section 403 is aligned with the scanning central axis 102 as a reference, which completes the alignment of the entire alignment system.

[0055] In this embodiment, according to the structure of the first imaging device, an alignment device 200 is designed. The positioning plate 11 is connected with the rotational component 103 of the first imaging device 100, and the positioning plate 11 is provided with a central hole 16 and a first horizontal laser slit 111 and a first vertical laser slit 112. The laser emitter 13, that is, the laser lamp, is installed on the positioning plate 11 through the mounting plate 12, and the mounting plate 12 can accurately adjust the position of the laser lamp, so that the laser emitted by the laser lamp can pass through the first horizontal laser slit 111 and the first vertical laser slit 112. It should be noted that at this time, the rotational component 103 of the first imaging device 100 is required to be in a vertical state without any inclination. Once the first imaging device 100 has a front-to-back pitch angle, the central axis is also inaccurate. In order to improve the accuracy of the scanning central axis 102 of the first imaging device, an alignment plate 14 is additionally provided.

[0056] It should be further noted that through precise machining, the central hole 16, the horizontal laser slit and the vertical laser slit of the positioning plate 11 and the alignment plate 14 are aligned respectively, thereby improving the accuracy of the axis of the scanning central axis 102 of the first imaging device.

[0057] Further, the first alignment mechanism 1 further comprises an alignment plate 14 connected to the positioning plate 11, the alignment plate 14 is parallel to the positioning plate 11, and the alignment plate 14 is provided with a second horizontal laser slit 141 and a second vertical laser slit 142 corresponding to the first horizontal laser slit 111 and the first vertical laser slit 112 on the positioning plate 11. It should be noted that the first horizontal laser slit 111 and the second horizontal laser slit 141 form a horizontal laser slit. The first vertical laser slit 112 and the second vertical laser slit 142 form a vertical laser slit. The alignment plate 14 is also provided with a center hole 16, which is a first center hole on the positioning plate 11 and a second center hole on the alignment plate 14. The two center holes 16 are coaxial, the first horizontal laser slit 111 and the second horizontal laser slit 141 are coplanar, and the first vertical laser slit 112 and the second vertical laser slit 142 are coplanar.

[0058] Further, the alignment plate 14 is connected to the positioning plate 11, and the positioning plate 11 forms a central axis, a physical horizontal plane and a physical vertical plane through the center hole 16 and the horizontal laser slit and the vertical laser slit. The laser lamp can emit horizontal rays and vertical rays, and the adjustment is made so that the two rays pass through the physical horizontal plane and the physical vertical plane respectively. It is ensured that the intersection axis of the two ray planes passes through the center hole 16, and then it is judged whether the axis of the laser coincides with the central axis of the first imaging device 100.

[0059] The laser emitter 13 can emit laser light towards the side of the second imaging device 300 through the first horizontal laser slit 111 and the second horizontal laser slit 141 and the first vertical laser slit 112 and the second vertical laser slit 142, forming the axis of the first imaging device 100.

[0060] The first alignment mechanism 1 can emit laser light towards the horizontal laser slit and the vertical laser slit, and the laser light can form a horizontal ray plane 3 and a vertical ray plane 4 through the horizontal laser slit and the vertical laser slit, and the two ray planes intersect to form the axis of the first imaging device 100.

[0061] The alignment device 200 further comprises a second alignment mechanism 2 capable of coinciding the axis of the second imaging device 300 with the axis of the first imaging device 100. The second alignment mechanism 2 comprises a rectangular pressure-sensitive film 21 adhered to the opposite end face of the probe 301, and the rectangular pressure-sensitive film 21 is provided with two reference lines intersecting in a cross shape, and the intersection of the two reference lines is the midpoint of the rectangular pressure-sensitive film 21. By adjusting the second imaging device 300, the horizontal ray plane 3 / vertical ray plane 4 is coincided with the corresponding reference line of the rectangular pressure-sensitive film respectively. The reference line of the rectangular pressure-sensitive film 21 is parallel to the detection rectangular region of the probe 301, and the midpoint of the rectangular pressure-sensitive film 21 is coincided with the center of the detection rectangular region of the probe 301. The detection rectangular region refers to the region formed by the detector on the probe 301, which is arranged in a rectangular shape due to structural reasons and is a conventional setting.

[0062] Specifically, the second imaging device images through two probes 301. Each probe 301 images a rectangular area covered by symmetrically arranged rectangular pressure films 21. A crosshair is imprinted on the surface of each film, which is equivalent to the scanning center line. Since the two probes 301 can rotate 360° around the rotating disk of the second imaging device, the scanning center axis 302 of the second imaging device can be found by moving the probes 301. The simplest operating method is to move the probes 301 to the 3 o'clock and 9 o'clock positions, so that the horizontal laser ray coincides with the crosshair; and move the probes 301 to the 6 o'clock and 12 o'clock positions, so that the vertical laser ray coincides with the crosshair. This confirms that the scanning center axis 302 of the second imaging device coincides with the laser crosshair.

[0063] Furthermore, the alignment plate 14 and the positioning plate 11 are connected by two parallel connecting rods 15.

[0064] Furthermore, the second imaging device 300 has two probes 301 that are centrally symmetrical about their own axis, and the two probes 301 are circumferentially rotatable relative to the second imaging device 300. A rectangular pressure film 21 is laid flat on the probes 301, and the size of the rectangular pressure film 21 is the same as the size of the end face of the probes 301.

[0065] Further, the first imaging device is either a first imaging device or a PET scanner. The second imaging device is a second imaging device. In this embodiment, the first imaging device is a CT gantry. The second imaging device is a SPECT gantry.

[0066] Furthermore, the scanning bed 400 has a first center line 401 and a second center line 402 arranged opposite to each other along its longitudinal direction, and the first center line is located on the side closer to the second imaging device 300.

[0067] Specifically, the front end of the scanning bed 403 has a first center line 401, and the rear end of the scanning bed has a second center line 402. By adjusting the two center lines to coincide with the vertical laser beam, the scanning center axis 102 of the first imaging device is made to coincide with the longitudinal section 403 of the center of the scanning bed.

[0068] On the other hand, an alignment method includes an alignment system, the alignment method comprising the following steps:

[0069] S1. Install the first imaging device 100 in the designated position, adjust the first imaging device 100 to be horizontal and rotate the component to the vertical position.

[0070] S2. The alignment device 200 is fixed to the rotating assembly of the first imaging device 100 via the mounting interface 101.

[0071] S3, open the switch of the laser emitter 13, adjust the horizontal ray emitted by the laser emitter 13 to form a horizontal ray plane 3 through the horizontal laser slit, and adjust the vertical ray emitted by the laser emitter 13 to form a vertical ray plane through the vertical laser slit.

[0072] Further, S3 further comprises:

[0073] S31, the positioning plate 11 and the alignment plate 14 of the alignment device 200 are provided with corresponding center holes 16, and whether the intersection of the two ray planes passes through the two center holes 16 is observed to confirm whether the axis of the laser coincides with the central axis of the first imaging device 100.

[0074] S4, pre-install and power on the second imaging device 300, and control the two probes 301 on the second imaging device 300 to move to the 3 o'clock and 9 o'clock positions respectively.

[0075] S5, adjust the second imaging device 300 in S4 so that the horizontal ray plane 3 of the laser coincides with the transverse reference line 211 of the cross intersection of the rectangular pressure-sensitive film of the two probes 301.

[0076] S6, control the two probes 301 of the second imaging device 300 to move to the 6 o'clock and 12 o'clock positions respectively.

[0077] S7, adjust the second imaging device 300 in S6 so that the vertical ray plane of the laser coincides with the transverse reference line 211 of the cross intersection of the rectangular pressure-sensitive film of the two probes 301.

[0078] S8, pre-install the scanning bed 400, and adjust the first centering line 401 and the second centering line 402 of the scanning bed 400 to coincide with the vertical ray plane of the laser emitter 13.

[0079] S9, after the alignment is completed, the second imaging device 300 and the scanning bed 400 are fixed.

[0080] Specifically, the method is as follows: the first imaging device 100 is installed at a designated position according to installation requirements, and the horizontal and rotating components of the frame are adjusted to a vertical orientation. An alignment tool is fixed on the rotating component 103 of the first imaging device 100 through a mounting interface. The laser light switch is turned on, and the horizontal ray plane 3 emitted by the laser light is adjusted to pass through the first and second horizontal laser slots, and the vertical ray plane 4 is adjusted to pass through the first and second vertical laser slots. It is confirmed that the laser axis coincides with the scanning center axis 102 of the first imaging device by observing that the intersection of the ray planes passes through the first and second center holes. The second imaging device 300 is pre-installed, the second imaging device 300 is powered on, and the two probes 301 of the second imaging device 300 are controlled to move to the 3 o'clock and 9 o'clock positions, respectively. The second imaging device 300 is adjusted so that the horizontal ray plane 3 of the laser light coincides with the cross line horizontal reference line 211 of the rectangular pressure touch film 21. The two probes 301 of the second imaging device 300 are controlled to move to the 6 o'clock and 12 o'clock positions, respectively. The second imaging device 300 is adjusted so that the vertical ray plane 4 of the laser light coincides with the cross line horizontal reference line 211 of the rectangular pressure touch film 311. The scanning bed 400 is pre-installed, and the first and second center lines 401 and 402 of the bed plate of the scanning bed 400 are adjusted to coincide with the vertical ray plane of the laser light. The alignment is completed.

[0081] In this embodiment, an alignment device, an alignment system and an alignment method for medical imaging are provided. The first alignment mechanism 1 is detachably connected to the first imaging device 100 to emit laser light and form a horizontal ray plane 3 and a vertical ray plane 4 passing through the horizontal and vertical laser slots. The intersection of the two ray planes is the axis of the first imaging device. After the axis of the first imaging device is determined, the reference lines of the rectangular pressure touch film of the second alignment mechanism 2 are aligned with the horizontal and vertical ray planes 3 / 4, respectively, to perform a two-step alignment method to coincide the axis of the second imaging device 300 with the constructed axis of the first imaging device, so that the second imaging device 300 is connected to the first imaging device. Finally, the scanning bed 400 is adjusted to be aligned with the two frames to eliminate the influence of patient positioning deviation. The alignment device is simple to operate and convenient to use, and the alignment is more direct and accurate. The rework caused by alignment errors is less, the labor and installation time are saved, the alignment accuracy is higher, and it is more conducive to subsequent image fusion. The traditional purification equipment is solved, and the labor cost is saved.

[0082] It should be noted that the cleaning liquid includes water, but is not limited to water. In order to improve the cleaning effect, the cleaning liquid can also be lye or steam.

[0083] In the description of the application, it is necessary to understand that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0084] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0085] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0086] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. An alignment device for medical imaging, characterized in that: The alignment device (200) is disposed on the first imaging device. The alignment device (200) includes a first alignment mechanism (1) connected to the first imaging device. The first alignment mechanism (1) is detachably connected to an annular end face of the first imaging device away from the second imaging device and forms two contact points at the connection point with the first imaging device. The connecting line of the two contact points can pass through the center of the annular end face of the first imaging device. The first alignment mechanism (1) has a horizontal laser slit and a vertical laser slit. The first alignment mechanism (1) is capable of emitting lasers toward the horizontal laser slit and the vertical laser slit, and the lasers are capable of passing through the horizontal laser slit and the vertical laser slit to form a horizontal ray surface (3) and a vertical ray surface (4), and the two ray surfaces intersect to form the axis of the first imaging device; The alignment device (200) further includes a second alignment mechanism (2) capable of aligning the axis of the second imaging device with the axis of the first imaging device. The second alignment mechanism (2) includes a rectangular pressure film (21) bonded to the opposite end face of the probe (301) of the second imaging device, and the rectangular pressure film (21) is provided with two reference lines that intersect in a cross shape, and the intersection of the two reference lines is the midpoint of the rectangular pressure film (21); By adjusting the second imaging device, the horizontal ray surface (3) and the vertical ray surface (4) are made to coincide with the corresponding baseline of the rectangular pressure film.

2. The alignment device for medical imaging as claimed in claim 1, characterized in that: The first alignment mechanism (1) includes a positioning plate (11) that is detachably connected to the first imaging device at both ends, and a mounting plate (12) connected to the positioning plate (11). The mounting plate (12) is located on the side of the positioning plate (11) away from the second imaging device, and a laser emitter (13) is provided on the mounting plate (12). The positioning plate (11) has a first horizontal laser slit (111) and a first vertical laser slit (112) that are perpendicular to each other.

3. The alignment device for medical imaging as claimed in claim 2, characterized in that: The first imaging device has two mounting interfaces (101), and the axis connecting line of the two mounting interfaces (101) can pass through the center of the annular end face of the first imaging device.

4. The alignment device for medical imaging as claimed in claim 2, characterized in that: The first alignment mechanism (1) further includes an alignment plate (14) connected to the positioning plate (11). The alignment plate (14) is parallel to the positioning plate (11), and the alignment plate (14) is provided with a second horizontal laser slit (141) and a second vertical laser slit (142) corresponding to the first horizontal laser slit (111) and the first vertical laser slit (112) on the positioning plate (11). The laser emitter (13) is able to emit lasers toward one side of the second imaging device through the first horizontal laser slit (111) and the second horizontal laser slit (141), as well as the first vertical laser slit (112) and the second vertical laser slit (142), forming the axis of the first imaging device.

5. The alignment device for medical imaging as claimed in claim 4, characterized in that: The alignment plate (14) and the positioning plate (11) are connected by two parallel connecting rods (15).

6. The alignment device for medical imaging as claimed in claim 1, characterized in that: The second imaging device is provided with two probes (301) that are centrally symmetrical with respect to their own axis, and the two probes (301) can rotate circumferentially relative to the second imaging device. The rectangular pressure film (21) is laid flat on the probe (301), and the size of the rectangular pressure film (21) is the same as the size of the end face of the probe (301).

7. The alignment device for medical imaging as claimed in claim 1, characterized in that: The first imaging device is CT or PET, and the second imaging device is SPECT.

8. An alignment system, characterized in that: Includes the alignment device (200), first imaging device, second imaging device, and scanning bed (400) for medical imaging as described in any one of claims 1-7. The scanning bed (400) is capable of being aligned with the first imaging device and the second imaging device after alignment.

9. The alignment system as claimed in claim 8, characterized in that: The scanning bed (400) has a first center line (401) and a second center line (402) arranged opposite to each other along its longitudinal direction, and the first center line (401) is located on the side closer to the second imaging device.

10. An alignment method, characterized in that: Including the alignment system of claim 9, the alignment method includes the following steps: S1. Install the first imaging device in the designated position, adjust the first imaging device to be horizontal and rotate the component to the vertical position; S2. The alignment device (200) is fixed to the rotating assembly of the first imaging device via the mounting interface (101); S3. Turn on the switch of the laser emitter (13), adjust the horizontal rays emitted by the laser emitter (13) to pass through the horizontal laser slit to form a horizontal ray surface (3), and the vertical rays emitted by the laser emitter (13) to pass through the vertical laser slit to form a vertical ray surface; S4. Pre-install and power on the second imaging device, and control the two probes (301) on the second imaging device so that the two probes (301) move to the 3 o'clock and 9 o'clock positions respectively; S5. Adjust the second imaging device in S4 so that the horizontal ray surface (3) of the laser coincides with the transverse reference line (211) of the cross intersection of the rectangular pressure films of the two probes (301); S6. Control the two probes (301) of the second imaging device to move to the 6 o'clock and 12 o'clock positions respectively; S7. Adjust the second imaging device in S6 so that the vertical ray surface of the laser coincides with the horizontal reference line (211) of the cross intersection of the rectangular pressure films of the two probes (301); S8. Pre-install the scanning bed (400) and adjust the first center line (401) and the second center line (402) of the scanning bed (400) to coincide with the vertical ray surface of the laser emitter (13); S9. After alignment, fix the second imaging device and the scanning bed (400).

Images