Alignment device, alignment system and alignment method for medical imaging

Abstract

The invention 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 and comprises a first alignment mechanism and a second alignment mechanism, and the first alignment mechanism is provided with a horizontal laser seam and a vertical laser seam. The first alignment mechanism can emit laser towards the horizontal laser seam and the vertical laser seam, and the laser can penetrate through the horizontal laser seam and the vertical laser seam to form a horizontal ray surface and a vertical ray surface. The second alignment mechanism includes a rectangular pressure contact film having a crisscrossed line. And by adjusting the second imaging device, the horizontal ray surface / the vertical ray surface is enabled to coincide with the corresponding datum line of the rectangular pressing touch film. The scanning bed is adjusted to be aligned with the alignment device, and the patient positioning deviation influence is eliminated. And alignment is more direct and accurate, rework caused by alignment errors is less, labor and installation time are saved, alignment precision is higher, and subsequent image fusion is facilitated.

Description

Technical Field

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

[0002] Single-photon emission computed tomography (Single-Photon emission computed tomography, the second imaging device) is a nuclear medicine imaging technology that uses the distribution of radioactive drugs in the body to reflect the physiological function and metabolism of organs or tissues. Computed tomography (Computed Tomography, the first imaging device) is a technology that combines electronic computers with X-ray inspections, and uses the different attenuation coefficients of X-ray transmission of different tissues in the human body to make the detector receive different radiation signals, thereby reconstructing human body tomographic images.

[0003] The second imaging device / first imaging device organically combines the second imaging device with the first imaging device, uses the same scanning bed and the same image processing workstation, and uses image reconstruction and fusion technology to form a second imaging device / first imaging device fused image of the second imaging device and the first imaging device. One imaging can simultaneously reflect the pathophysiological changes and morphological structure of the lesion, achieving complementary advantages, and has the characteristics of high sensitivity, accuracy, high specificity and precise positioning.

[0004] At present, the second imaging device / first imaging device are designed to arrange the scanning bed second imaging device and the first imaging device in sequence along the axial direction of the first imaging device, that is, the second imaging device is between the first imaging device and the scanning bed, the axes of the two frames coincide, and the longitudinal surface of the scanning bed coincides with the axis of the frame. In order to achieve better fusion of the image of the second imaging device with the image of the first imaging device, 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 frames is mainly through laying the anchor template on the ground, and indirectly determining the spatial position of the frame through the fixed point on the ground. This method has extremely high requirements on the position of the ground installation hole and requires experienced and skilled operators. If one of the holes has a large deviation, it is necessary to avoid all installation positions of this hole and re-drill. Once the operator is a novice or the drilling position deviates, the axis overlap of the second imaging device and the first imaging device is low, which ultimately leads to unsatisfactory mechanical alignment results, and requires repeated adjustments in the later stage, resulting in poor alignment effect of the two frames, and then unsatisfactory alignment effect. Summary of the invention

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an alignment device, an alignment system and an alignment method for medical imaging, which solves the technical problem that the alignment methods of the two racks may lead to poor alignment effects of the two racks, requiring repeated adjustments, and thus leading to unsatisfactory alignment effects. At the same time, the alignment of the scanning bed and the two racks is increased to ensure that the patient is in a consistent positioning state when performing the two scans.

[0006] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0007] On the one hand, an embodiment of the present invention provides an alignment device for medical imaging, the alignment device 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 an annular end surface of the first imaging device away from a second imaging device and forms two contact points at the connection with the first imaging device, the connection line of the two contact points can pass through the center of the annular end surface of the first imaging device, and the first alignment mechanism has a horizontal laser slit and a vertical laser slit;

[0008] The first alignment mechanism can emit laser light toward the horizontal laser slit and the vertical laser slit, and the laser light can pass through the horizontal laser slit and the vertical laser slit to form a horizontal ray plane and a vertical ray plane, and 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 bonded to the opposite end faces of the probe, and the pressure-touch film is provided with two cross-shaped reference lines, and the intersection of the two reference lines is the midpoint of the rectangular pressure-touch film;

[0011] By adjusting the second imaging device, the horizontal ray plane / vertical ray plane is made to coincide with the corresponding reference lines of the rectangular pressure-touch film respectively.

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

[0013] The mounting plate is arranged on a 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 which are perpendicular to each other.

[0015] Optionally, the first imaging device is provided with two mounting interfaces, and an axis connecting line of the two mounting interfaces can pass through the center of a circle of an annular end surface 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 is capable of emitting laser light toward one 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 to form an axis of the first imaging device.

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

[0019] Optionally, the second imaging device has two probes that are centrally symmetrical relative to its own axis, and the two probes can rotate circumferentially relative to the second imaging device, the rectangular pressure-touch film is flat on the probes, and the size of the rectangular pressure-touch film is the same as the end face size of the probe.

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

[0021] On the other hand, an alignment system includes the alignment device for medical imaging, a first imaging device, a second imaging device, and a scanning bed;

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

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

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

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

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

[0027] S3, turning on the switch of the laser transmitter, adjusting the horizontal ray emitted by the laser transmitter to pass through the horizontal laser slit to form a horizontal ray plane, and adjusting the vertical ray emitted by the laser transmitter to pass through the vertical laser slit to form a vertical ray plane;

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

[0029] S5, adjusting the second imaging device in S4 so that the horizontal ray plane of the laser coincides with the cross-intersecting transverse reference lines of the rectangular pressure-touch films of the two probes;

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

[0031] S7, adjusting the second imaging device in S6 so that the vertical ray plane of the laser coincides with the cross-intersecting transverse reference lines of the rectangular pressure-touch films of the two probes;

[0032] S8, pre-installing a scanning bed, and adjusting the first center line and the second center line of the scanning bed to coincide with the vertical ray plane of the laser transmitter;

[0033] S9, after the alignment is completed, the second imaging device and the scanning bed are fixed.

[0034] The beneficial effects of the present invention are as follows: an alignment device, an alignment system and an alignment method for medical imaging of the present invention, a laser is emitted through a detachably connected first alignment mechanism on a first imaging device and passes through a horizontal laser slit and a vertical laser slit to form a horizontal ray plane and a vertical ray plane, 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 line of the rectangular pressure touch film of the second alignment mechanism is then aligned with the horizontal ray plane / vertical ray plane respectively, so as to perform a two-step alignment method to coincide the constructed axis of the second imaging device with the first imaging device, so that the second imaging device is connected to the first imaging device, and finally the scanning bed is adjusted to align with the two racks to eliminate the influence of the patient's positioning deviation. Moreover, the alignment device is simple to operate and easy to use, and the alignment is more direct and accurate, with less rework caused by alignment errors, saving labor and installation time, and higher alignment accuracy, which is more conducive to subsequent image fusion. The disadvantage that the traditional purification equipment is troublesome to disassemble and assemble back and forth during cleaning is solved, saving labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0038] Figure 4 yes Figure 1 A primary 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] Description of Reference Numerals

[0041] 100: first imaging device; 101: mounting interface; 102: scanning center axis of the first imaging device; 103: rotating assembly;

[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 touch film; 211: horizontal reference line;

[0043] 3: horizontal ray plane; 4: vertical ray plane;

[0044] 300: second imaging device; 301: probe; 302: scanning central axis of the second imaging device;

[0045] 400: scanning bed; 401: first center line; 402: second center line; 403: longitudinal section at the center of the scanning bed. DETAILED DESCRIPTION

[0046] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific implementation methods. 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 positions of “3 o’clock” and “9 o’clock”; Figure 1 The line segment 102 in is defined as the "scanning center axis of the first imaging device"; Figure 1 The line segment 302 in is defined as the "scanning center axis of the second imaging device"; Figure 1 The plane where center 403 is located is defined as “central longitudinal section 403 of the scanning bed”.

[0047] See also Figure 1-Figure 5 As shown, an alignment system proposed in an embodiment of the present invention includes 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 aligned first imaging device 100 and the second imaging device 300 .

[0049] It should be noted that, in this embodiment, it is necessary to use an alignment mechanism to align the first imaging device 100 and the second imaging device 300 before aligning the scanning bed 400. In addition, the physical installation position accuracy requirements of the installation stage are achieved. The components that need to be aligned are: 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 scanning center axis 102 of the first imaging device, the scanning center axis 302 of the second imaging device, and the central longitudinal section 403 of the scanning bed.

[0050] Among them, the alignment device 200 is arranged on the first imaging device, and the alignment device 200 includes a first alignment mechanism 1 connected to the first imaging device 100, and the first alignment mechanism 1 is detachably connected to an annular end face of the first imaging device 100 away from the second imaging device 300 and forms two contact points at the connection with the first imaging device 100, and the connecting line of the two contact points can pass through the center of the annular end face of the first imaging device 100, and the first alignment mechanism 1 has a horizontal laser slit and a vertical laser slit.

[0051] Furthermore, the first alignment mechanism 1 includes a positioning plate 11 whose two ends are detachably connected to the first imaging device 100 by bolts, and a mounting plate 12 connected to the positioning plate 11. The mounting plate 12 is arranged on a side of the positioning plate 11 away from the second imaging device 300, and a laser emitter 13 is arranged on the mounting plate 12.

[0052] Furthermore, the first imaging device 100 is provided with two mounting interfaces 101 , and the axis connecting 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 the first imaging device determines the axis, it is necessary to ensure that the horizontal and rotating components 103 of the first imaging device 100 are adjusted to a vertical position. To ensure that the scanning center axis 102 of the first imaging device coincides with the rotation center of the first imaging device 100, the first imaging device 100 is designed with a mounting interface 101 of the alignment device 200, and the center of the alignment device 200 tooling coincides with the rotation center of the first imaging device 100. This ensures that the simulated center axis 102 determined by it is accurate.

[0054] Specifically, it is first necessary to find the scanning center axis 102 of the first imaging device 100, and use this axis as a reference to align the scanning center axis 302 of the second imaging device 300 with the scanning center axis 102 reference, and align the central longitudinal section 403 of the scanning bed with the scanning center axis 102 reference, thus completing the alignment work 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 to the rotating assembly 103 of the first imaging device 100, and the positioning plate 11 is processed with a center 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 realize accurate adjustment of the position of the laser lamp so that the laser emitted by the laser lamp can just pass through the first horizontal laser slit 111 and the first vertical laser slit 112. It should be noted that at this time, the rotating assembly 103 of the first imaging device 100 is required to be in a vertical state without any tilt. Once the first imaging device 100 has a front and rear pitch angle, its central axis is also inaccurate. In order to improve the accuracy of the scanning center axis 102 of the first imaging device. An additional alignment plate 14 is added.

[0056] It should also be noted that, through precision machining, the center holes 16 of the positioning plate 11 and the alignment plate 14, the horizontal laser slits and the vertical laser slits are aligned, respectively, thereby improving the accuracy of the axis of the scanning center axis 102 of the first imaging device.

[0057] Furthermore, the first alignment mechanism 1 also 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. 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 vertical laser slit 142 form a vertical laser slit. A center hole 16 is also provided on the alignment plate 14, the first center hole on the positioning plate 11 and the 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] Furthermore, the alignment plate 14 is connected to the positioning plate 11, and forms a central axis, a physical horizontal plane, and a physical vertical plane with the positioning plate 11 through the central hole 16 and the horizontal laser slit and the vertical laser slit. The laser lamp can emit horizontal rays and vertical rays, and the two rays are adjusted so that they pass through the physical horizontal plane and the physical vertical plane respectively. Ensure that the intersection axis of the two ray planes passes through the central hole 16, and then determine 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 toward one side of the second imaging device 300 through the first and second horizontal laser slits 111 and 141 and the first and second vertical laser slits 112 and 142 to form an axis of the first imaging device 100 .

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

[0061] The alignment device 200 also includes a second alignment mechanism 2 capable of aligning the axis of the second imaging device 300 with the axis of the first imaging device 100. The second alignment mechanism 2 includes a rectangular pressure touch film 21 bonded to the opposite end faces of the probe 301, and two cross-shaped reference lines are provided on the rectangular pressure touch film 21, and the intersection of the two reference lines is the midpoint of the rectangular pressure touch film 21. By adjusting the second imaging device 300, the horizontal ray plane 3 / vertical ray plane 4 is respectively overlapped with the corresponding reference lines of the rectangular pressure touch film. The reference line of the rectangular pressure touch film 21 is parallel to the detection rectangular domain of the probe 301, and the midpoint of the rectangular pressure touch film 21 coincides with the center of the detection area of ​​the probe 301. The detection rectangular area refers to the area formed by the detector on the probe 301, which is arranged in a rectangle due to structural reasons and is a conventional setting.

[0062] Specifically, the imaging of the second imaging device is performed through two probes 301. The probes 301 are imaged as a rectangular area, and the surface is covered with symmetrically arranged rectangular pressure-touch films 21. The surface of the rectangular pressure-touch films 21 is printed with a cross center line, 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 through the movement of the probes 301. The simplest operation 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 cross center line; move the probes 301 to the 6 o'clock and 12 o'clock positions so that the vertical laser ray coincides with the cross center line, and then it can be determined that the scanning center axis 302 of the second imaging device coincides with the laser cross axis.

[0063] Furthermore, the alignment plate 14 and the positioning plate 11 are connected via two connecting rods 15 which are arranged parallel to each other.

[0064] Furthermore, the second imaging device 300 has two probes 301 that are centrally symmetrical relative to its own axis, and the two probes 301 can rotate circumferentially relative to the second imaging device 300, and the rectangular pressure touch membrane 21 is flat on the probe 301, and the size of the rectangular pressure touch membrane 21 is the same as the end face size of the probe 301.

[0065] Further, the first imaging device is a first imaging device or a PET. 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] Further, the scanning bed 400 has a first center line 401 and a second center line 402 which are arranged opposite to each other along the longitudinal direction thereof, and the first center line is located at a side close to the second imaging device 300 .

[0067] Specifically, the front end of the bed plate of the scanning bed 403 has a first center line 401, and the rear end of the bed plate has a second center line 402. The two center lines are adjusted to coincide with the vertical laser ray, thereby achieving the coincidence of the scanning center axis 102 of the first imaging device and the central longitudinal section 403 of the scanning bed.

[0068] In another aspect, an alignment method includes an alignment system, the alignment method comprising the following steps:

[0069] S1. Install the first imaging device 100 at a designated location, adjust the first imaging device 100 to a horizontal level, and rotate the components to a vertical position.

[0070] S2 . Fix the alignment device 200 on the rotating component of the first imaging device 100 through the mounting interface 101 .

[0071] 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 plane 3, and adjust the vertical rays emitted by the laser emitter 13 to pass through the vertical laser slit to form a vertical ray plane.

[0072] Furthermore, S3 also includes:

[0073] S31. Corresponding center holes 16 are provided on the positioning plate 11 and the alignment plate 14 of the alignment device 200. Observe whether the intersection axes of the two rays pass through the two center holes 16 to confirm whether the axis of the laser coincides with the center 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 the two probes 301 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 cross-intersecting transverse reference lines 211 of the rectangular pressure-touch films 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 cross-intersecting transverse reference lines 211 of the rectangular pressure-touch films of the two probes 301 .

[0078] 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 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] The specific method is as follows: install the first imaging device 100 at the designated position according to the installation requirements, and adjust the frame horizontal and rotating components to the vertical position. Fix the alignment tool to the rotating component 103 of the first imaging device 100 through the installation interface. Turn on the laser light switch, adjust the horizontal ray plane 3 emitted by the laser light to pass through the first and second horizontal laser slits, and the vertical ray plane 4 to pass through the first and second vertical laser slits. Observe that the intersection axis of the ray plane passes through the first and second center holes to confirm that the laser axis coincides with the scanning center axis 102 of the first imaging device. Pre-install the second imaging device 300, power on the second imaging device 300, and control the two probes 301 of the second imaging device 300 to move to the 3 o'clock and 9 o'clock positions respectively. Adjust the second imaging device 300 so that the horizontal ray plane 3 of the laser coincides with the crosshair horizontal reference line 211 of the rectangular pressure-touch film 21. Control the two probes 301 of the second imaging device 300 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 coincides with the crosshair horizontal reference line 211 of the rectangular pressure-touch film 311. The scanning bed 400 is pre-installed, and the first center line 401 and the second center line 402 of the bed plate of the scanning bed 400 are adjusted to coincide with the vertical ray plane of the laser lamp, and the alignment is completed.

[0081] In this embodiment, an alignment device, an alignment system and an alignment method for medical imaging are provided. A detachably connected first alignment mechanism 1 is provided on a first imaging device 100 to emit a laser and pass through a horizontal laser slit and a vertical laser slit to form a horizontal ray plane 3 and a vertical ray plane 4. 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 line of the rectangular pressure-touch film of the second alignment mechanism 2 is aligned with the horizontal ray plane 3 / vertical ray plane 4 respectively, so as 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 align with the two racks to eliminate the influence of the patient's positioning deviation. Moreover, the alignment device is simple to operate and easy to use, and the alignment is more direct and accurate, with less rework caused by alignment errors, saving labor and installation time, and higher alignment accuracy, which is more conducive to subsequent image fusion. The disadvantage that the traditional purification equipment is troublesome to disassemble and assemble back and forth during cleaning is solved, and labor costs are saved.

[0082] It should be noted here 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 alkaline solution or steam to improve the cleaning effect.

[0083] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0084] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0086] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

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

2. The alignment device for medical imaging according to claim 1, characterized in that: The first alignment mechanism (1) comprises a positioning plate (11) with both ends detachably connected to the first imaging device, and a mounting plate (12) connected to the positioning plate (11); The mounting plate (12) is arranged on a side of the positioning plate (11) away from the second imaging device, and a laser emitter (13) is arranged on the mounting plate (12); 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.

3. The alignment device for medical imaging according to claim 4, characterized in that: The first imaging device is provided with two installation interfaces (101), and the axis connecting line of the two installation interfaces (101) can pass through the center of the annular end surface of the first imaging device.

4. The alignment device for medical imaging according to claim 2, characterized in that: The first alignment mechanism (1) further comprises an alignment plate (14) connected to the positioning plate (11), the alignment plate (14) being parallel to the positioning plate (11), and the alignment plate (14) being 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 capable of emitting laser light toward one side of the second imaging device 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), thereby forming an axis of the first imaging device.

5. The alignment device for medical imaging according to claim 4, characterized in that: The alignment plate (14) and the positioning plate (11) are connected via two connecting rods (15) that are arranged parallel to each other.

6. The alignment device for medical imaging according to claim 1, characterized in that: The second imaging device has two probes (301) which are centrally symmetrical with respect to its own axis, and the two probes (301) are capable of rotating in a circumferential direction relative to the second imaging device; the rectangular pressure-touch film (21) is laid flat on the probes (301), and the size of the rectangular pressure-touch film (21) is the same as the size of the end face of the probe (301).

7. The alignment device for medical imaging according to 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: Comprising the alignment device (200) for medical imaging according to any one of claims 1 to 7, a first imaging device, a second imaging device and a scanning bed (400); The scanning bed (400) is capable of being aligned with the aligned first imaging device and the second imaging device.

9. The alignment system of claim 8, wherein: 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 a side close to the second imaging device.

10. An alignment method, characterized in that: The alignment system according to claim 9, wherein the alignment method comprises the following steps: S1, installing the first imaging device at a designated position, adjusting the first imaging device to a horizontal position and rotating the assembly to a vertical position; S2, fixing the alignment device (200) on the rotating component of the first imaging device via a mounting interface (101); S3, turning on the switch of the laser emitter (13), adjusting the horizontal rays emitted by the laser emitter (13) to pass through the horizontal laser slit to form a horizontal ray plane (3), and adjusting the vertical rays emitted by the laser emitter (13) to pass through the vertical laser slit to form a vertical ray plane; S4, pre-installing and powering on the second imaging device, and controlling 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, adjusting the second imaging device in S4 so that the horizontal ray plane (3) of the laser coincides with the cross-intersecting transverse reference lines (211) of the rectangular pressure-touch films of the two probes (301); S6, controlling the two probes (301) of the second imaging device to move to the 6 o'clock and 12 o'clock positions respectively; S7, adjusting the second imaging device in S6 so that the vertical ray plane of the laser coincides with the cross-intersecting transverse reference lines (211) of the rectangular pressure-touch films of the two probes (301); S8, pre-installing the scanning bed (400), and adjusting the first center line (401) and the second center line (402) of the scanning bed (400) to coincide with the vertical ray plane of the laser emitter (13); S9: After the alignment is completed, the second imaging device and the scanning bed (400) are fixed.

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