CN106236121A - The aligning regulating device of a kind of multi-mode imaging system and alignment control method thereof - Google Patents

Abstract

An alignment adjustment device and an alignment adjustment method for a multi-modal imaging system. The multi-modal imaging system includes a PET imaging system and other imaging systems. The alignment adjustment device includes two target frames vertically arranged on the ground and a The main support mechanism is used to install and fix the target frame or the PET frame; the two target frames are parallel to each other, and the connecting direction of the bull's-eye indicates the axis direction of the PET imaging system; the main support mechanism includes an adjustment base and a For installing and fixing the frame bottom plate of the target frame or the PET frame, the adjustment base is used to adjust the distance between different positions of the frame bottom plate and the ground, so that the bulls-eyes of the two target frames are aligned with the centers of other imaging systems. axis coincidence; the PET frame is installed on the adjusted main support mechanism, and the alignment adjustment device and alignment adjustment method thereof provided by the present invention have a simple structure, and the moving and alignment process is fast, simple and effective, and can Effectively guarantee the coaxiality requirements of the PET detector and other imaging systems.

Description

Alignment adjustment device and alignment adjustment method for a multi-modal imaging system

technical field

The invention relates to the technical field of medical devices, and relates to medical imaging equipment, in particular to an alignment adjustment device and an alignment adjustment method for a multi-modal imaging system.

Background technique

Multi-modal imaging systems can be used for scanning in multiple modalities, such as Positron Emission Tomography (PET), Single Positron Emission Tomography (SPECT), Nuclear Resonance Imaging (MRI), Computed Tomography (Computed Tomography, CT) and so on.

In a multimodal system (also known as a polymorphic system), some of the same hardware is used to complete different scans. For example, PET-CT is an organic combination of PET and CT, using the same examination table and the same image processing workstation. Due to the inherent coincidence with CT images, PET images and CT images are reconstructed and fused to form a PET-CT fusion image, which can reflect the pathophysiological changes and morphological structure of the lesion at the same time, achieving complementary advantages, with sensitivity, accuracy, High specificity and precise positioning.

The above inherent coincidence is based on the assumption that the coordinate systems of different imaging systems, such as PET and CT gantry, are aligned. If the coordinate systems of different imaging systems are not aligned, it may directly lead to image misregistration, which cannot be prepared. Subsequent steps such as image reconstruction are performed, and thus accurate image information cannot be provided.

Therefore, it is necessary to provide a mounting mechanism that is simple in structure, convenient to adjust, and can well ensure the coaxial requirements of different imaging systems.

Contents of the invention

The purpose of the present invention is to provide an alignment adjustment device and alignment adjustment method for a multi-modal imaging system, which has a simple structure and is easy to operate, and can effectively ensure the coaxiality requirements of the PET detector and the CT rotation center, and at the same time The separation of different imaging systems can be realized, which also brings convenience to equipment maintenance and security inspection.

To achieve the above object, the solution of the present invention is:

An alignment adjustment device for a multi-modal imaging system, the multi-modal imaging system includes a PET imaging system and other imaging systems, including two target frames vertically arranged on the ground and used for installing and fixing the target frames or PET The main support mechanism of the rack;

The two target frames are parallel to each other, and the line direction of the bull's-eye indicates the axis direction of the PET imaging system;

The main support mechanism includes an adjustment base and a frame bottom plate arranged on the adjustment base for installing and fixing the target frame or the PET frame, and the adjustment base is used for adjusting different positions of the frame bottom plate and The distance from the ground makes the bull's-eyes of the two target frames coincide with the central axes of other imaging systems;

The PET frame is installed on the adjusted main support mechanism.

Preferably, the upper ends of the two target frames are provided with first oblong holes and circular hole plates with circular holes, and the circular hole plates are detachably connected to the target frames.

Preferably, the circular hole plate is arranged parallel to the plate surface of the target frame, both of which are perpendicular to the ground, and the circular hole plate is arranged on any side of the target frame.

Preferably, when the circular hole plate is fixed on the target frame, the circular hole communicates with the first oblong hole and is arranged at the center of the first oblong hole; the circular hole and the first oblong hole The axial direction of the first oblong hole is parallel to the ground, and the long side direction of the first oblong hole is perpendicular to the ground.

Preferably, the adjustment base includes at least one set of symmetrically arranged rolling bearings arranged on the lower bottom surface.

Preferably, the adjustment base includes at least four height adjustment bearings arranged around;

Both ends of the adjustment base are respectively provided with fixed plates located below the bottom plate of the frame and arranged parallel to the ground, and the height adjustment bearing passes through and is movably fixed on the fixed plates and is arranged perpendicular to the ground;

Rotate each of the height adjustment bearings to change the distance between the frame bottom plate and the ground at this point.

Preferably, the height adjustment bearing includes a base and a support column, and the support column is a hexagon bolt with a raised hexagonal bolt along the horizontal direction at the lower end;

The upper end of the base is provided with an opening, and the width of the opening is larger than the width of the stud of the hexagonal bolt and smaller than the width of the protrusion.

Preferably, a thrust ball bearing is provided inside the base;

The support column is arranged above the base after passing through the opening of the base, the upper end of the protrusion is in contact with the inner cover of the base, and the lower end is arranged on the thrust ball bearing.

Preferably, the support column is connected to the fixing plate through threads.

An alignment adjustment device for a PET-CT imaging system. The alignment adjustment device for a PET-CT imaging system provided by the present invention further includes a CT center indicating component. The CT center indicating component is arranged coaxially with the alignment adjustment device of the multimodal imaging system, the CT center indicating component is used to indicate the axis of the CT equipment, and the alignment adjustment of the multimodal imaging system The device confirms the height of the adjustment base in the alignment adjustment and separation according to the position of the CT center indicating component;

The CT center indicator assembly is installed on the CT frame, including a laser calibration device and a calibration base plate for fixing the laser calibration device on the CT frame;

The calibration base plate is installed on the transverse diameter of the CT frame, and it includes a calibration base plate body, the length of the calibration base plate body is the same as the diameter of the CT frame, and the curvature of the two sides of the calibration base plate body is the same as the curvature of the CT frame. With the same setting, a through hole for passing the laser is also set at the center of the calibration base body;

The laser calibration device includes a laser and an optical platform for installing the laser. The optical platform includes an optical base plate, a laser adjustment table positioned on the optical platform, and a light guide hole plate, and the light guide hole plate is vertically fixed on the optical platform. On the base plate, when the laser calibration device is installed on the calibration base plate, the light guide hole of the light guide plate and the through hole are axially overlapped and set as the adjustment reference of the laser, and the laser is installed on the On the laser adjustment table, the distance between the laser adjustment table and the optical table is adjustable to adjust the position of the laser so that the laser emitted by the laser can pass through the light guide hole;

Preferably, the calibration base plate also includes two connecting lugs, the connecting lugs are located on both sides of the calibration base body, and the connecting lugs and the CT frame are correspondingly provided with connection holes to assist in the Calibrate the positioning between the base plate body and the CT frame;

Preferably, the calibration bottom plate body and the connecting ear plate are integrally processed;

Preferably, the laser adjustment table includes an adjustment base plate and adjustment bolts that pass through the adjustment base plate, the laser is fixed on the adjustment base plate, and the adjustment base plate and the optical base plate are provided with multiple adjustment bolts corresponding to the adjustment base plate. a connecting hole, the distance between the adjustment base plate and the optical base plate is adjusted via the plurality of adjustment bolts so that the laser light emitted by the laser can pass through the light guide hole;

Preferably, the optical backplane and the calibration backplane body are correspondingly provided with a positioning slot at the connection, and the optical backplane and the calibration backplane body are positioned and connected via the positioning slot;

Preferably, the positioning groove on the optical base plate shares the same elevation with the laser adjustment table to assist in the positioning between the laser and the calibration base plate;

Preferably, the laser emitted by the laser is a cross-shaped or straight-shaped laser, and the light guide holes are correspondingly arranged in a cross-shaped or straight-shaped structure.

An alignment adjustment method of an alignment adjustment device of a multimodal imaging system, characterized in that the alignment adjustment method includes:

Step 1, determine the axis position of other imaging systems;

Step 2, aligning the axis of the PET imaging system with the axis of the other imaging system based on the axis of the other imaging system:

Step 2-1, adjust the height of each height adjustment bearing of the PET imaging system alignment adjustment device so that the base does not touch the ground, remove the round hole plate from the target frame, and rely on the rolling bearings to push the PET imaging system moving in the horizontal direction so that the axes of the other imaging systems pass through the first oblong holes of the two target holders;

Step 2-2, adjust the height of each height adjustment bearing so that its base is placed on the ground;

Step 2-3, installing the circular hole plate on the target frame, adjusting the height of each of the height adjustment bearings, so that the axes of the other imaging systems pass through the two circular holes of the target frame;

In step 2-4, the target frame is removed from the main supporting mechanism, and the PET frame is installed on the main supporting mechanism.

Owing to adopting said scheme, the beneficial effect of the present invention is:

The invention provides an alignment adjustment device and alignment adjustment method for a multi-modal imaging system, which is easy to move, and can be aligned by using a linear laser through movably connected circular holes and oblong holes: After the alignment in the horizontal direction, install the round hole plate to adjust to achieve the alignment in the vertical direction. The adjustment base that realizes the adjustment function has a simple structure. Through the height adjustment bearings arranged at the four corners, the height adjustment bearings are rotated by the head of the hexagonal bolt, and the thrust ball bearing can bear the thrust load when the bolt rotates, thereby changing the height of the lower end of the fixing plate. The height of the height adjustment bearing, and then change the height of each point of the main support mechanism equipped with the height adjustment bearing, that is, the distance between different positions of the frame bottom plate and the ground, to achieve center alignment adjustment, and the small number of height adjustment bearings makes the adjustment process simple and fast .

Description of drawings

FIG. 1 is a schematic structural diagram of an embodiment of an alignment adjustment device for a multimodal imaging system provided by the present invention;

Figure 2 is a partially enlarged view of part A in Figure 1 provided by the present invention;

Fig. 3 is a partial enlarged view of part B in Fig. 1 provided by the present invention;

Fig. 4 is a bottom view of an embodiment of an adjustment base provided by an embodiment of the present invention;

5 is a schematic cross-sectional view of the connection between the height adjustment bearing and the fixing plate provided by the embodiment of the present invention;

Fig. 6 is a schematic diagram of the installation structure of the laser and the optical table in an embodiment of a CT center indicator assembly provided by the present invention;

Fig. 7 is a schematic diagram of the installation structure of the optical table and the calibration base plate in an embodiment of a CT center indicator assembly provided by the present invention;

Among them, the multimodal imaging system alignment adjustment device 100, the target frame 110, the first oblong hole 111, the round hole 112, the round hole plate 113, the main support mechanism 120, the adjustment base 121, the frame bottom plate 122, the rolling bearing 123, the height Adjusting bearing 124, base 1241, support column 1242, protrusion 1243, opening 1244, thrust ball bearing 1245, fixing plate 125, laser device 211, optical base plate 212, laser adjustment table 213, light guide hole plate 214, adjustment base plate 215, adjustment Bolt 216 , calibration base plate body 221 , connecting lug plate 222 .

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

Embodiment one

Embodiment 1 provided by the present invention is an embodiment of an alignment adjustment device for a multi-modal imaging system, as shown in FIG. 1 , which is a schematic structural diagram of an embodiment of an alignment adjustment device for a multi-modal imaging system provided by the present invention , it can be seen from FIG. 1 that the multimodal imaging system includes a PET imaging system and other imaging systems, and the other imaging systems may be a CT imaging system or an MRI imaging system or the like. The multimodal imaging system alignment adjustment device 100 includes two target racks 110 vertically arranged on the ground and a main support mechanism 120 for installing and fixing the target racks 110 or PET racks.

The two target frames 110 are parallel to each other, and the direction of the connecting line of the bull's-eye indicates the direction of the axis of the PET imaging system.

Main supporting mechanism 120 comprises adjustment base 121 and is arranged on the adjustment base 121 and is used for installing the frame base plate 122 of fixed target frame 110 or PET frame, and adjustment base 121 is used for adjusting the distance of different positions of frame base plate 122 and the ground, so that The bull's-eyes of the two target racks 110 coincide with the central axes of other imaging systems, and the PET racks are installed on the adjusted main support mechanism 120 .

The above-mentioned adjustment base 121 and the frame bottom plate 122 are both precision-machined and symmetrical about the axial direction.

Preferably, as shown in Fig. 2 and Fig. 3, it is the partial enlarged view of A and B in Fig. 1 respectively, as can be seen from Fig. 2 and Fig. 3, the upper ends of the two target holders 110 are provided with first oblong holes 111 and are provided with round holes. The round hole plate 113 of the hole 112 is detachably connected with the target frame 110 .

The circular hole plate 113 is arranged parallel to the plate surface of the target frame 110, and is all perpendicular to the ground. The circular hole plate 113 is arranged on any side of the target frame 110. What provided in the embodiment shown in FIG. Example of two different sides of the target frame.

When the round hole plate 112 is fixed on the target frame 110 , the round hole 112 communicates with the first oblong hole 111 and is arranged at the center of the first oblong hole 111 . The axial direction of the round hole 112 and the first oblong hole 111 is parallel to the ground, and the long side direction of the first oblong hole 111 is perpendicular to the ground.

Further, as shown in FIG. 4 , it is a bottom view of an embodiment of the adjustment base provided by the present invention, the adjustment base 121 includes at least one set of symmetrically arranged rolling bearings 123 arranged on the lower bottom surface, such as bull's-eye ball bearings, as shown in FIG. 4 In the illustrated embodiment, four sets of left-right symmetrical rolling bearings 123 are arranged on the lower bottom surface of the adjustment base 121 .

The adjustment base 121 also includes at least four height adjustment bearings 124 symmetrically arranged around, so as to effectively realize the adjustment of the distance between the frame bottom plate 122 and the ground. There are four, which are respectively arranged at the four corners of the adjustment base 121 . Both ends of the adjustment base 121 are respectively provided with a fixed plate 125 parallel to the ground below the frame bottom plate 122, and the height adjustment bearing 124 passes through and is movably fixed on the fixed plate 125 and is vertical to the ground. Rotate each height adjustment bearing 124 to change the height of the base 121 at this point, and then change the distance between the frame bottom plate 122 and the ground at this point.

As shown in Figure 5, it is a schematic cross-sectional view of the connection between the height adjustment bearing and the fixed plate provided by the present invention. As can be seen from Figure 5, the height adjustment bearing 124 includes a base 1241 and a support column 1242. 1243 hex bolts. The upper end of the base 1241 is provided with an opening 1244 , the width of the opening 1244 is larger than the width of the stud of the hexagonal bolt and smaller than the width of the protrusion 1243 , and the inside of the base 1241 is provided with a thrust ball bearing 1245 . The support column 1242 is set above the base 1241 after passing through the opening 1244 of the base 1241 , the upper end of the protrusion 1243 is in contact with the inner cover of the base 1241 , and the lower end is set on the thrust ball bearing 1245 . The supporting column 1242 is threadedly connected with the fixed plate 125, and the height adjustment bearing 124 is rotated by the head of the hexagonal bolt during use, and the thrust ball bearing 1245 can bear the thrust load when the bolt rotates, thereby changing the height adjustment bearing 124 at the lower end of the fixed plate 125 The height of each point of the main support mechanism 120 that is provided with the height adjustment bearing 124 is changed accordingly. The height adjustment bearing 124 is used as the load-bearing supporting part of the PET machine, and M20 bolts are used.

When the alignment adjustment device for a multi-modal imaging system provided by Embodiment 1 of the present invention performs alignment adjustment with other imaging systems, the bulls-eyes of the two target frames 110 coincide with the central axes of other imaging systems. Preferably, this The invention provides an embodiment of a CT center indicating component, which is used to realize the confirmation and indicating of the CT axis. The CT center indicating component realizes the positioning of the CT axis through machining. Specifically, the CT center indicating component is fixedly installed On the CT frame, as shown in Figure 6 and Figure 7, it is a schematic diagram of the installation structure of the laser, the optical table, and the optical table and the calibration base plate in an embodiment of a CT center indicator assembly provided by the present invention, as shown in Figure 6 and Figure 7 7. It can be seen that the CT center indicator component includes a laser calibration device and a calibration base plate manufactured by machining. The length of the correction base plate body in the calibration base plate is set to be the same as the diameter of the CT frame. The laser 211 in the laser calibration device is located at the center of the calibration base plate body. At the center position, since the axial and horizontal directions have been adjusted during the installation process of the CT frame, when the horizontally adjusted CT center indicator component is fixedly installed on the CT frame, the laser 211 can be regarded as the axis of the CT frame specified location.

The laser calibration device includes a laser 211 and an optical platform on which the laser 211 is installed. The optical platform specifically includes an optical base plate 212, a laser adjustment table 213 and a light guide hole plate 214 arranged on the optical base plate 212. The optical base plate 212 is integrally installed on the calibration base plate. At the central position, the laser adjustment table 213 and the light guide hole plate 214 are located at both ends of the optical bottom plate 212 and are vertical to the bottom plate. When the laser calibration device is installed on the calibration base plate, the center point of the light guide hole plate 214 and the calibration base plate body 221 are axially coincident, and the shape of the light guide hole on the light guide hole plate 214 corresponds to the laser emitted by the laser 211. Or a cross shape, so that the light guide hole plate 214 is used as a reference to adjust and determine the position of the laser 211 . The laser 211 is pressed and fixed on the laser adjustment table by bolts. The laser adjustment table includes an adjustment base plate 215 and a plurality of adjustment bolts 216. The adjustment base plate 215 is installed on the optical base plate 212, and a plurality of connection holes are respectively set corresponding to the adjustment bolts 216. Adjust the distance between the bottom plate 215 and the optical bottom plate 212 via adjustment bolts, so that the laser light emitted by the laser 211 can effectively pass through the above-mentioned light guide hole, so that after the laser calibration device 210 is installed on the calibration bottom plate 220, the laser 211 is axially coincident with the center point of the calibration bottom plate body 221 .

The calibration base plate is manufactured by finishing, and it is installed on the transverse diameter of the CT frame, including the calibration base plate body 221, and a through hole is set in the center of the calibration base plate body 221, so that when the laser calibration device is fixed on the calibration base plate body 221 At this time, the laser light emitted by the laser 211 can sequentially pass through the through hole and the light guide hole to reach the bull's-eye of the target frame 110, so as to carry out the alignment step of the subsequent CT frame and the PET frame.

In one of the embodiments, the length of the calibration base plate body 221 is the same as the diameter of the CT frame, and the curvature of both sides of the calibration base plate and the curvature of the CT frame are also set the same, so that the calibration base plate body 221 can be snapped and installed on the CT frame. on the transverse diameter.

In order to ensure the installation accuracy and stability of the calibration base plate body 221, in addition to the calibration base plate body 221, the calibration base plate also includes two connecting ear plates 222, and the two connecting ear plates 222 are located on both sides of the calibration base plate body 221. Preferably, the calibration base plate body 221 and the connecting lug plate 222 are integrally processed, and the connecting lug plate and the CT frame are correspondingly provided with connection holes. The bolted connection with the CT frame can more reliably ensure the installation accuracy and reliability of the calibration base plate. In addition, the two ends of the calibration base plate body 221 can also be set in a stepped shape, and then radially tighten the calibration base plate through fastening screws. The calibration bottom plate body 221 is fixed on the CT frame.

In order to facilitate the installation and positioning of the laser calibration device on the calibration base, the calibration base body 221 is provided with corresponding positioning grooves on the surface in contact with the optical base, and the positioning grooves on the calibration base body 221 are provided along the length direction of the calibration base body 221 And the width of the positioning groove is the same as the width of the optical base plate, and the positioning groove on the optical base plate is opened along the width direction of the optical base plate. After the optical bottom plate is vertically cross-connected with the calibration bottom plate body 221 through the positioning grooves for preliminary positioning, the two sets of positioning grooves are fastened and connected by several sets of bolts to realize the installation between the optical bottom plate and the calibration bottom plate body 221 .

As a preferred solution, the positioning groove on the optical base plate and the laser adjustment table share the same elevation, and the width of the positioning groove on the optical base plate is set the same as the thickness of the calibration base plate body 221, so that when the calibration base plate body 221 and the optical base plate pass through two When the group positioning slots are vertically limited and connected, the laser adjustment table is set just next to the wall of the calibration base plate body 221 to further improve the installation accuracy. In addition, the width of the positioning slots on the optical base plate can also be wider than the thickness of the calibration base plate body 221 Setting, when designed in this way, in order to improve the installation accuracy, a bolt hole is correspondingly set on the facade of the calibration base plate body 221, and a corresponding bolt passes through the bolt hole and reaches the facade of the laser adjustment table, thereby assisting in laser calibration The installation position of the device and the calibration base plate is relatively fixed.

Embodiment two

Embodiment 2 provided by the present invention is an embodiment of an alignment adjustment method for an alignment adjustment device of a multi-modal imaging system provided in Embodiment 1 of the present invention. The PET imaging system is aligned with other imaging systems. When the axial direction of the PET imaging system does not coincide with the central axis of other imaging systems, first adjust the displacement parallel to the ground: adjust the height to adjust the height of the bearing so that the base does not touch the ground, and rely on the rolling bearing to push the PET imaging system horizontally Move so that the axes of other imaging systems pass through the first oblong holes of the two target holders. Then adjust the displacement perpendicular to the ground direction: adjust the height of the round hole plate and the height adjustment bearing, make the lower end base of the height adjustment bearing contact with the ground, adjust the displacement of each point of the height adjustment bearing on the bottom plate of the rack perpendicular to the ground direction, so that The axes of other imaging systems pass through the round holes of the two target frames, and the whole adjustment process is quicker and easier.

Specifically, the alignment adjustment process includes:

Step 1, determine the axis positions of other imaging systems.

Step 2, aligning the axes of the PET imaging system and other imaging systems based on the axes of other imaging systems.

Specifically, this step 2 includes:

Step 2-1, adjust the height of each height adjustment bearing of the PET imaging system alignment adjustment device so that the base does not touch the ground, remove the round hole plate from the target frame, and rely on the rolling bearing to push the PET imaging system to move horizontally , so that the axes of other imaging systems pass through the first oblong holes of the two target frames.

Step 2-2, adjust the height of each height adjustment bearing so that its base is placed on the ground.

Step 2-3, install the circular hole plate on the target frame, adjust the height of each height adjustment bearing, so that the axes of other imaging systems pass through the circular holes of the two target frames.

Step 2-4, remove the target frame from the main support mechanism, and install the PET frame on the main support mechanism.

Preferably, in step 1, if the CT center indicator assembly structure shown in the present invention is used to confirm the axis of the CT gantry, the following steps are included:

In step 1-1, the installation position of the laser 211 is determined. Since it can be ensured through machining that the light guide hole of the light guide hole plate 214 coincides with the center axis of the calibration base plate body 221 after the assembly of the CT center indicator assembly is completed, the laser 211 uses the position of the light guide hole plate 214 as a reference to realize its own alignment. Calibration of the installation position: After fixing the laser 211 on the laser adjustment table 213, turn on the laser 211, and then adjust the distance between the base plate 215 and the optical base plate 212 by fine-tuning, so that the cross-shaped or straight laser emitted by the laser 211 can penetrate The light guide hole plate 214 is used to realize the calibration of the laser calibration device 210 itself.

Step 1-2, install the debugged laser calibration device on the calibration base plate, and verify the horizontal state of the CT center indicator component after assembly. Fix the adjusted laser calibration device on the calibration base plate, and use a spirit level to correct the overall horizontal state of the CT center indicator assembly. The optical base plate 212 of the laser calibration device is installed on the calibration base plate through a card slot. After the two are connected and fixed by bolts, the level is placed on the optical base plate 212, and the CT center indicator component after installation is determined by the level, that is, the laser 211 level status. Since both the laser calibration device and the calibration base plate are manufactured by machining, if the two are installed in place, the laser calibration device is in a horizontal state. After confirming that the laser calibration device is in a horizontal state through a spirit level, it can be used as a reference for CT For the adjustment of the rack, if the level is deflected and is not in a horizontal state, then remove the laser calibration device from the calibration base plate and fix it again until it is confirmed that the two are still in a horizontal state after they are connected.

Step 1-3, install the verified CT center indicator component on the fixed bracket of the imaging system, then the laser can be regarded as the designated position of the axis of the CT gantry, and the horizontally adjusted CT center indicator component is installed on the CT machine After being installed on the rack, since the axial and horizontal directions have been adjusted during the installation process of the CT rack, when the adjusted horizontal CT center indicator component is fixed and installed on the CT rack via the calibration base plate, the position of the laser can be considered as the position of the CT. The specified location of the axis of the rack.

The invention provides an alignment adjustment device for a multi-modal imaging system, which is easy to move, and can be aligned by using a linear laser through the movably connected circular holes and oblong holes: after horizontal alignment is achieved during the horizontal movement , Install a circular hole plate to adjust to achieve vertical alignment. The adjustment base that realizes the adjustment function has a simple structure. Through the height adjustment bearings arranged at the four corners, the height adjustment bearings are rotated to change the height of the height adjustment bearings at the lower end of the fixed plate, and then change the height of each point of the main support mechanism provided with the height adjustment bearings. The center alignment adjustment can be realized, and the small number of height adjustment bearings makes the adjustment process simple and fast.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (11)

1. An alignment adjustment device for a multi-modal imaging system, the multi-modal imaging system includes a PET imaging system and other imaging systems, characterized in that: it includes two target frames vertically arranged on the ground and is used for mounting and fixing The main supporting mechanism of the target frame or the PET frame; The two target frames are parallel to each other, and the line direction of the bull's-eye indicates the axis direction of the PET imaging system; The main support mechanism includes an adjustment base and a frame bottom plate arranged on the adjustment base for installing and fixing the target frame or the PET frame, and the adjustment base is used for adjusting different positions of the frame bottom plate and The distance from the ground makes the bull's-eyes of the two target frames coincide with the central axes of other imaging systems; The PET frame is installed on the adjusted main support mechanism. 2. The alignment adjustment device according to claim 1, characterized in that: the upper ends of the two target frames are provided with first oblong holes and circular hole plates with circular holes, and the circular hole plates are connected to the circular hole plates. The target frame is detachably connected. 3. The alignment adjustment device according to claim 1, characterized in that: the circular hole plate is arranged parallel to the plate surface of the target frame, both perpendicular to the ground, and the circular hole plate is arranged on the target frame either side of the . 4. The alignment adjustment device according to claim 1, characterized in that: when the circular hole plate is fixed on the target frame, the circular hole communicates with the first oblong hole and is arranged on the second long circular hole. The central position of an oblong hole; the axial direction of the circular hole and the first oblong hole is parallel to the ground, and the long side direction of the first oblong hole is perpendicular to the ground. 5. The alignment adjustment device according to claim 1, wherein the adjustment base comprises at least one set of symmetrically arranged rolling bearings arranged on the lower bottom surface. 6. The alignment adjustment device according to claim 1, characterized in that: the adjustment base includes at least four height adjustment bearings arranged around; Both ends of the adjustment base are respectively provided with fixed plates located below the bottom plate of the frame and arranged parallel to the ground, and the height adjustment bearing passes through and is movably fixed on the fixed plates and is arranged perpendicular to the ground; Rotate each of the height adjustment bearings to change the distance between the frame bottom plate and the ground at this point. 7. The alignment adjustment device according to claim 6, characterized in that: the height adjustment bearing comprises a base and a support column, and the support column is a hexagonal bolt with a protrusion along the horizontal direction at the lower end; The upper end of the base is provided with an opening, and the width of the opening is larger than the width of the stud of the hexagonal bolt and smaller than the width of the protrusion. 8. The alignment adjustment device according to claim 7, characterized in that: a thrust ball bearing is arranged inside the base; The support column is arranged above the base after passing through the opening of the base, the upper end of the protrusion is in contact with the inner cover of the base, and the lower end is arranged on the thrust ball bearing. 9 . The alignment adjustment device according to claim 7 , wherein the support column is connected to the fixing plate through threads. 10 . 10. An alignment adjustment device for a PET-CT imaging system, characterized in that: the alignment adjustment device for the PET-CT imaging system includes the alignment adjustment device for the multimodal imaging system according to any one of claims 1-9. The alignment adjustment device further includes a CT center indicating component, the CT center indicating component is arranged coaxially with the alignment adjusting device of the multimodal imaging system, and the CT center indicating component is used to indicate the axis of the CT equipment , the alignment adjustment device of the multimodal imaging system confirms the height of the adjustment base in the alignment adjustment and separation according to the position of the CT center indicator component; The CT center indicator assembly is installed on the CT frame, including a laser calibration device and a calibration base plate for fixing the laser calibration device on the CT frame; The calibration base plate is installed on the transverse diameter of the CT frame, and it includes a calibration base plate body, the length of the calibration base plate body is the same as the diameter of the CT frame, and the curvature of the two sides of the calibration base plate body is the same as the curvature of the CT frame. With the same setting, a through hole for passing the laser is also set at the center of the calibration base body; The laser calibration device includes a laser and an optical platform for installing the laser. The optical platform includes an optical base plate, a laser adjustment table positioned on the optical platform, and a light guide hole plate, and the light guide hole plate is vertically fixed on the optical platform. On the base plate, when the laser calibration device is installed on the calibration base plate, the light guide hole of the light guide plate and the through hole are axially overlapped and set as the adjustment reference of the laser, and the laser is installed on the On the laser adjustment table, the distance between the laser adjustment table and the optical table is adjustable to adjust the position of the laser so that the laser emitted by the laser can pass through the light guide hole; Preferably, the calibration base plate also includes two connecting lugs, the connecting lugs are located on both sides of the calibration base body, and the connecting lugs and the CT frame are correspondingly provided with connection holes to assist in the Calibrate the positioning between the base plate body and the CT frame; Preferably, the calibration bottom plate body and the connecting ear plate are integrally processed; Preferably, the laser adjustment table includes an adjustment base plate and adjustment bolts that pass through the adjustment base plate, the laser is fixed on the adjustment base plate, and the adjustment base plate and the optical base plate are provided with multiple adjustment bolts corresponding to the adjustment base plate. a connecting hole, the distance between the adjustment base plate and the optical base plate is adjusted via the plurality of adjustment bolts so that the laser light emitted by the laser can pass through the light guide hole; Preferably, the optical backplane and the calibration backplane body are correspondingly provided with a positioning slot at the connection, and the optical backplane and the calibration backplane body are positioned and connected via the positioning slot; Preferably, the positioning groove on the optical base plate shares the same elevation with the laser adjustment table to assist in the positioning between the laser and the calibration base plate; Preferably, the laser emitted by the laser is a cross-shaped or straight-shaped laser, and the light guide holes are correspondingly arranged in a cross-shaped or straight-shaped structure. 11. An alignment adjustment method of the alignment adjustment device of the multimodal imaging system according to any one of claims 1-10, wherein the alignment adjustment method comprises: Step 1, determine the axis position of other imaging systems; Step 2, aligning the axis of the PET imaging system with the axis of the other imaging system based on the axis of the other imaging system: Step 2-1, adjust the height of each height adjustment bearing of the PET imaging system alignment adjustment device so that the base does not touch the ground, remove the round hole plate from the target frame, and rely on the rolling bearings to push the PET imaging system moving in the horizontal direction so that the axes of the other imaging systems pass through the first oblong holes of the two target holders; Step 2-2, adjust the height of each height adjustment bearing so that its base is placed on the ground; Step 2-3, installing the circular hole plate on the target frame, adjusting the height of each of the height adjustment bearings, so that the axes of the other imaging systems pass through the two circular holes of the target frame; In step 2-4, the target frame is removed from the main supporting mechanism, and the PET frame is installed on the main supporting mechanism.