WO2016188352A1

WO2016188352A1 - Pet imaging rod source device and pet equipment

Info

Publication number: WO2016188352A1
Application number: PCT/CN2016/082454
Authority: WO
Inventors: 王浩; 张建兵
Original assignee: 武汉数字派特科技有限公司
Priority date: 2015-05-22
Filing date: 2016-05-18
Publication date: 2016-12-01
Also published as: CN104825185B; CN104825185A

Abstract

Disclosed is a PET imaging rod source device, comprising a rod source body (500), a first rotating module (100) for driving the rod source body (500) to rotate around the axial direction at a uniform speed, and a second rotating module (200) for driving the rod source body (500) to rotate around the centre-axis, wherein the first rotating module (100) comprises a first power assembly (110), a first transmission assembly (120) and a rotating arm structure (130); the first power assembly (110) is parallel to the axial direction; the rotating arm structure (130) is perpendicular to the axial direction; the first power assembly (110) and the rotating arm structure (130) are in transmission connection via the first transmission assembly (120); the second rotating module (200) is fixed at the end of the rotating arm structure (130) far away from the first transmission assembly (120); an output end of the second rotating module (200) is parallel to the axial direction; and the output end of the second rotating module (200) is directly connected to the rod source body (500) to drive the rod source body (500) to rotate around the centre-axis, and at the same time follows the movement of the first power assembly (110) to drive the rod source body (500) to rotate around the axial direction, so that all detector units can be more uniformly irradiated when the rod source body (500) is subjected to normalization correction, and a more accurate correction result is obtained.

Description

PET imaging rod source device and PET equipment

Technical field

The present invention relates to the field of medical device technology, and in particular to a correction structure applied to a PET imaging device.

Background technique

In the field of nuclear medicine, PET (positron emission tomography) is a non-invasive imaging technique that displays the function and metabolism of human organs. This technique can be used clinically to guide cancer treatment. The principle is that the malignant tumor tissue in the patient's body is highly metabolized, and metabolites (such as glucose, protein, etc.) are more concentrated. We can use radionuclides (such as 18F, 11C, etc.) to mark metabolites, and then use PET imaging systems and accurately display the aggregation and activity of metabolites through three-dimensional imaging technology to reflect the activities of life metabolism. PET can also be integrated with CT on a single instrument to form an integrated PET-CT system. The PET-CT mainly includes a PET host, a CT host, and a PET detector. The patient undergoes a rapid whole body scan during the examination. CT anatomical images and PET functional metabolic images can be obtained at the same time, and the two images complement each other so that the doctor can make an accurate judgment on the disease.

In order to increase the detection efficiency, medical PET is usually an annular detection system containing tens of thousands of detection units. Influenced by differences in geometric position and performance, such as crystal luminous efficiency, crystal encapsulation, coupling of crystals to PMT (photomultiplier tube), electronic systems, and different incident angles of photon pairs, the detection efficiency of the detection unit is not uniform. Therefore in the actual detection of the results sinograms, even if all the detection units are evenly illuminated. This will inevitably introduce artifacts during the reconstruction process, leading to doctors' misjudgment of the tumor. In order to accurately model the detection system and obtain satisfactory image quality, the user must correct the detection efficiency of the detector in advance, which is called normalization correction. PET systems generally need to undergo two normalization corrections. One is to use a low-scattering source to correct the non-time-varying part of the normalization factor before leaving the factory, and the second is to adjust the drift of the detector performance to the normalization factor in the hospital. Impact.

In the first normalization correction, it is common practice to use a rod source containing uniform radioactivity to rotate at a constant speed around the axis of the PET detection system to evenly illuminate all of the detector units. The radius of rotation is large enough to ensure that the trajectory covers the specified field of view of the PET detector ring. Calibration tests usually require a dozen or more hours to get enough compliance events. Since the coincidence events detected by all the detection units are statistically identical, the corresponding count response can be used as a measure of the efficiency of the detection unit, on the basis of which the normalization factor can be calculated. Since the source is a rod source, scatter correction and attenuation correction can be used in data processing. ignore. These factors need to be calculated in advance and stored in the file as a computer. When the patient is examined, the normalization correction is achieved by directly applying the normalization factor to the measured value.

In addition, the existing PET-CT equipment also needs to regularly maintain the PET detector in order to ensure the scanning precision. In the prior art, in the maintenance of the PET detector, special tooling is required to take the entire PET detector from PET- The CT main unit is removed, and then the rod source device on the PET detector 3' is removed to maintain the detection module in the PET detector; when the maintenance of all the detection modules is completed, the rod source device is reinstalled on the PET detector. The PET detector is then reassembled onto the PET-CT mainframe.

In order to achieve a precise coincidence of CT and PET images, the scanning center of the PET main unit and the CT main unit must be on the virtual calibration line, so the PET detector must be calibrated when it is reinstalled. During the calibration process, the initial calibration is first performed mechanically, then the deviation is confirmed by image scanning, and then the calibration is performed accurately, and the calibration process is repeated.

Generally, it takes an average of 1.5 working days to complete all the above calibration work. The calibration process is complicated and takes a long time, which greatly reduces the effective running time of the equipment. At the same time, the disassembly and assembly of the rod source device requires special tooling. This increases the cost of maintenance and the intensity of the operator's work.

Therefore, how to design a rod source device for use in a PET system is a problem to be considered by those skilled in the art.

Summary of the invention

The object of the present invention is to provide a PET imaging rod source device and a PET device. When the rod source device is moved to a designated position, the rod source body is uniformly moved around the PET axis (preferably the middle axis) except by the first rotating module. Rotating to evenly illuminate all the detecting units, and also accepting the driving of the second rotating module for self-rotation. Since the rod source body theoretically cannot radiate 100% step by step, it can be more advantageously compensated by rotating itself. At one point, all the detection units can be illuminated more evenly, and the calibration results obtained are more accurate.

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

A PET imaging rod source device comprising a rod source body, further comprising: a first rotating module for driving the rod source body to rotate uniformly around the axial direction; and a second rotating module for driving the rod source body to rotate;

The output end of the second rotating module is disposed parallel to the axial direction, and the output end of the second rotating module is axially connected to the rod source body to drive the rod source body to rotate;

The first rotating module includes a first power component, a first power component, and a rotating arm structure, the first power component is disposed parallel to the axial direction, and the rotating arm structure is disposed perpendicular to the axial direction, the first Power component and the rotating arm The structure is drivingly connected via the first transmission component, and the second rotation module is fixed to an end of the rotating arm structure away from the first transmission component to follow the movement of the first power component to drive the rod source body Rotate around the axis.

The rotating arm structure includes an arm joint, a rotating arm body and a positioning card slot, and one end of the rotating arm body is detachably connected to the first transmission component via the arm joint, the rotating arm body is away from One end of the first transmission component is provided with a positioning card slot, and the second rotation module is provided with a positioning joint corresponding to the positioning card slot to be fixed on the rotating arm structure.

The rotating arm structure is a variable length structure, the rotating arm body includes an active arm detachably coupled to the first transmission component, and at least one extension arm, the active arm is positioned away from an end of the first transmission component a card slot, wherein the extension arm is provided with a positioning joint at one end and a positioning card slot at the other end, between the active arm and the extension arm, between the extension arm and the extension arm, between the active arm or the extension arm and the second rotation module The connection is detachable via the cooperation of the positioning card slot and the positioning joint.

The positioning card slot is a shallow groove of a U-shaped opening, the positioning joint is corresponding to a U-shaped joint, and the shallow groove and the U-shaped joint are respectively provided with a positioning hole and a locking hole for rotating the arm body and a fixed connection inside the second rotating module or the rotating arm body.

The second rotating module includes a second power component and/or a clamp fixed to the output end of the second power component, the output end of the power component directly contacting the rod source body or via the clamp The rod source body is connected to drive the rod source body to rotate under the driving of the second power component.

The PET imaging rod source device further includes a transmission module for moving the rod source body to a designated position, the transmission module including a vertical lifting mechanism and a horizontal moving mechanism, the first power component of the first rotating module, a transmission assembly is disposed on the horizontal movement mechanism, and a rotating arm structure of the first rotation module is disposed outside the horizontal movement mechanism to drive the rod source body to follow the horizontal movement mechanism to advance or retreat axially. The horizontal moving mechanism is disposed on the vertical lifting mechanism to drive the rod source body to vertically rise or fall following the vertical lifting mechanism.

Preferably, the horizontal moving mechanism includes a third bottom plate, a third power unit and a screw-slider unit fixed to the bottom plate, and a support plate for fixing the first rotating module, the lead screw- The slider unit includes at least one lead screw and a slider disposed through the lead screw, and an output end of the third power unit is axially rotatably coupled to the lead screw, an upper bottom surface of the support plate and the first power component The first transmission component is fixedly connected, and a lower bottom surface of the support plate is disposed on the slider to drive the rod source body to move horizontally in the axial direction under the driving of the third power unit.

Preferably, the vertical lifting mechanism comprises at least one set of scissor lifting platforms, wherein the scissor lifting platforms are vertically stacked and fixedly arranged, and each set of scissor lifting platforms comprises a fourth bottom plate disposed on the fourth Fourth power list on the bottom plate And a screw-slider unit, two sets of support rods, the lead screw-slider unit includes at least one lead screw and a slider disposed through the lead screw, and an output end of the fourth power unit The lead screw is axially rotatably connected, and each set of support rods comprises a fixed rod of a scissor fork hinged connection and a free rod, and the bottom of the free rod is fixed on the slider, the fixed rod The bottom is fixed on the scissor lifting platform of the layer, and the top of the free rod and the top of the fixing rod are respectively fixedly connected with the fourth bottom plate of the upper scissor lifting platform.

Further, the lead screw-slider unit further includes two sets of limiting components to limit the maximum stroke of the slider on the lead screw.

The invention also discloses a PET apparatus comprising at least one detector ring, further comprising a PET imaging rod source device as described above, the stroke of the vertical lifting mechanism being higher than the height of the central axis of the PET device Causing the first power unit to rise vertically to a position coaxial with the PET device, the stroke of the horizontal moving mechanism being not less than a thickness setting of the detector ring to push or withdraw the rod source body axially Said PET equipment.

Due to the adoption of the above scheme, the beneficial effects of the present invention are:

1. When the transmission module moves the first rotation module and the second rotation module to the designated position, the rod source body is mounted on the fixture, and the rod source body is uniformly moved around the central axis of the PET, except by the first rotation module. In addition to the rotation, the second rotation module is also driven to rotate. Since the rod source body is theoretically unable to be 100% step-by-step uniform, it can be compensated by rotating itself, thereby making the calibration more accurate.

2. It can automatically complete the calibration without disassembling any components of the PET machine, improving the maintenance efficiency of the PET system. After adopting the rod source device shown in the invention, the detection module can be maintained without removing the detector from the PET, and the special tooling required for disassembling the detector is not needed, which saves manpower and material resources and effectively reduces maintenance costs; Since the disassembly and assembly of the detector is not required, the calibration process when the detector is reinstalled is omitted, thereby improving the maintenance efficiency and increasing the effective utilization time of the entire PET-CT detector; in addition, the detector is always in the PET host. On the top, the scanning centers of the two are always coincident, which avoids the error caused by recalibration, thus ensuring that the images of PET and CT can coincide.

3. In the rod source device shown in the present invention, the structure of the rotating arm is adjustable in length. For different sizes of PET or PET-CT equipment, the second rotating module and the rod source can be installed after removing or adding the elongated arm according to requirements. To the structure of the rotating arm, the radius of rotation of the rod source device is matched with the PET or PET-CT to be corrected to ensure that all the detecting units in the detection field are uniformly illuminated, and the versatility is strong.

4. The vertical lifting mechanism and the horizontal moving mechanism have precise and controllable stroke. For different sizes of PET or PET-CT equipment, the vertical lifting mechanism is used to raise the first power unit to a position coaxial with the PET equipment, thereby The central axis can be rotated around the PET; the horizontal moving mechanism is used to drive the rod source to step along the axial direction of the detector. The PET or PET-CT of the detector ring, the stroke of the horizontal moving mechanism is not less than the thickness setting of the detector ring, and the rod source can be transported axially to the detector ring that needs to be normalized. In addition, the vertical lifting mechanism is vertically stacked by a multi-layer scissor lifting platform, which can effectively meet the requirement of raising the height when performing correction, and when the correction is not needed, the overall folding setting takes up little space.

5. The rod source is conveniently stored. Since the entire rod source device is disposed outside the PET device, when the calibration is not required, the rod source can be removed from the fixture and placed in a specific shielding effect for storage. It is not necessary to specifically provide a shielding device for storing the rod source inside the PET device.

DRAWINGS

1 is a schematic structural view of an embodiment of a PET imaging rod source device according to the present invention;

Figure 2 is an exploded view of the embodiment shown in Figure 1;

3 is a schematic view showing the position between the embodiment shown in FIG. 1 and the PET main unit when performing normalization correction;

Figure 4 is a side view of the schematic view of Figure 3;

Figure 5 is a schematic view showing the structure of the embodiment shown in Figure 1 after the extension arm is provided;

6 is a schematic structural view of another embodiment of a PET imaging rod source device according to the present invention;

Figure 7 is a schematic structural view of a transmission module in the embodiment shown in Figure 6;

Figure 8 is a schematic view showing the state of the transmission module in the non-operating state in the embodiment shown in Figure 6;

Figure 9 is a schematic view showing a state in which the vertical lifting mechanism is raised to a designated position in the embodiment shown in Figure 6;

In the figure, the first rotating module 100, the first power component 110, the first transmission component 120, the rotating shaft 121, the coupling 122, the rotating arm structure 130, the arm joint 131, the positioning slot 132, the active arm 133, and the lengthening The arm 134, the positioning joint 135, the second rotating module 200, the second power component 210, the clamp 220, the horizontal moving mechanism 300, the third bottom plate 310, the third power unit 320, the support plate 330, the vertical lifting mechanism 400, and the fourth bottom plate 410, a fourth power unit 420, a fixed rod 431, a free rod 432, a lead screw A, a slider B, a limit assembly C, and a rod source body 500.

detailed description

The invention will be further described below in conjunction with the embodiments shown in the drawings.

As shown in FIG. 1 to FIG. 5, the present invention discloses a PET imaging rod source device, comprising a rod source body 500, a first rotation module 100 for driving the rod source body 500 to rotate uniformly around the axial direction, and a driving rod source body 500. The second rotation module 200 that rotates.

The first rotation module 100 includes a first power assembly 110, a first transmission assembly 120, and a rotating arm structure 130. The first power assembly 110 is disposed parallel to the axial direction, and the rotating arm structure 130 is disposed perpendicular to the axial direction, that is, parallel to the PET host. The height direction is set, the first power component 110 and the rotating arm structure 130 are movably connected via the first transmission component 120, the output end of the second rotation module 200 is disposed parallel to the axial direction, and the output end of the second rotation module 200 and the rod The source body is directly connected to drive the rod source body to rotate, and the second rotation module 200 is disposed at an end of the rotating arm structure away from the first transmission assembly, so that the second rotation module 200 can rotate around the axis following the movement of the first power assembly. Both axial and radial directions are referred to herein by reference to the PET main unit, which refers to the direction parallel to the central axis of the PET main body, which refers to the mounting direction of the detector in the PET main unit.

During the calibration of the normalization of the detector, the first, rod source body rotates itself while rotating uniformly around the central axis, so that all the detecting units can be more uniformly illuminated; second, the entire PET imaging rod source device It is arranged outside the PET main body, and it is not necessary to disassemble the PET main body when performing the normalization correction of the detector. Third, the rod source body and the second rotating module are detachably connected, and after the normalization correction is completed, the rod can be removed. The source body is detached from the jig 220 and stored separately, without the need to specifically provide a shielding mechanism for storing the rod source body in the PET main body.

Specifically, as shown in FIG. 1 to FIG. 3, in the illustrated embodiment, the first power component 110 is a motor, and the first transmission component 120 includes a rotating shaft 121 and a coupling 122, and one end of the rotating shaft 121 is coupled via a coupling. The rotating device 130 is rotatably connected to the output end of the first power assembly 110. The rotating arm structure 130 includes an arm joint 131, a rotating arm body and a positioning slot 132. The rotating arm body is detachable via the arm joint 131 and the rotating shaft 121. The arm root joint 131 is provided with a connecting hole on one side for fixed connection with the rotating shaft 121. The other side of the arm root joint 131 and the rotating arm body are correspondingly provided with a plurality of sets of bolt holes, and the rotating arm body is fixed to the arm root joint via a bolt. The positioning slot 132 is disposed at an end of the rotating arm body away from the first transmission component 120 for fixedly connecting the second rotating module 200. The second rotating module 200 includes a second power component 210 and/or a clamp 220 for clamping the rod source body. The second power component 210 is specifically a motor, and one end of the second power component 210 is disposed with a corresponding positioning slot 132 to provide a positioning joint 135. The second power component 210 can be effectively fixed on the rotating arm structure, and the output end of the second power component 210 is rotatably connected to the clamp 220, and the other end of the clamp 220 is hollow, and the inside is provided with a thread, and the rod source body has a thread passing through the end thereof. The rod source body 500 is directly connected to the rod source body 500, so that the rod source body 500 can drive the rod source body 500 to rotate under the driving of the second power unit 210.

In addition, as shown in FIG. 5, the rotating arm structure is a variable length structure, so that for different sizes of PET or PET-CT equipment, the radius of rotation of the rod source device can be corrected after the extension arm 134 is removed or added as needed. Match PET or PET-CT. The rotating arm body includes an active arm 133 and at least one extension arm 134 detachably connected to the rotating shaft of the first transmission component 120. The active arm 133 is disposed at a position away from the rotating shaft 121 to provide a positioning slot 132, and the extension arm 134 The positioning joint 135 is disposed at one end and the positioning slot 132 is disposed at the other end, so that between the active arm 133 and the extension arm 134, between the extension arm 134 and the extension arm 134, between the active arm or the extension arm 134 and the second power unit 210 The connection is detachable via the cooperation of the positioning card slot 132 and the positioning joint 135. In the illustrated embodiment, the positioning card slot 132 is a shallow groove of a U-shaped opening, the positioning joint 135 corresponds to a U-shaped joint, and a shallow hole and a U-shaped joint are respectively provided with a positioning hole and a locking hole for the rotating arm. The body is fastened to the interior of the second rotating module 200 or the rotating arm body.

After the rod source device shown in the present invention is moved to the designated position, the rod source body is mounted on the jig, and the rod source body is further rotated around the central axis of the PET in addition to the first rotating module 100. The driving of the second rotating module 200 is rotated. Since the rod source body is theoretically impossible to be 100% step-by-step uniform, it can be compensated by rotating itself, thereby making the calibration result more accurate.

As shown in FIG. 7 to FIG. 9, the rod source device of the present invention further includes a transmission module for transporting the first rotation module 100 and the second rotation module 200 to a designated position, which includes a vertical lifting mechanism. 400 and a horizontal moving mechanism 300, the first power component 110 of the first rotating module and the first transmission component 120 are respectively disposed on the horizontal moving mechanism 300, and the rotating arm structure 130 of the first rotating module is disposed outside the horizontal moving mechanism 300. When the horizontal moving mechanism 300 is in operation, the first rotating module 100 can be moved axially as a whole, and the horizontal moving mechanism 300 is disposed on the vertical lifting mechanism 400. When the vertical lifting mechanism 400 is in operation, the horizontal moving mechanism 300 and the first rotating module 100 are driven. The second rotating module 200 is vertically raised or lowered. In the text, the plane perpendicular to the toroidal surface of the detector is a horizontal plane, and the height direction of the PET main body is a vertical direction.

As shown in FIG. 6, the horizontal moving mechanism 300 includes a third bottom plate 310, a third power unit 320 and a screw-slider unit fixed to the third bottom plate 310, and a support plate 330 for fixing the first rotating module 100. The screw-slider unit includes at least one lead screw A and a slider B disposed through each of the plurality of sets of lead screws A. In the illustrated embodiment, a total of three sets of lead screws are provided, including a screw provided on the surface of the surface. And the light rods on both sides, the two sets of screw rods are respectively fixed at both ends, the output end of the third power unit 320 is directly connected or the coupling is arranged in the axial direction of the intermediate screw, and the slider B corresponds to the three sets of lead screws. The bottom hole is respectively disposed on the lead screw, and the upper bottom surface of the support plate 330 is used for fixing the first power component 110 and the first transmission component 120. The lower bottom surface of the support plate 330 is disposed on the slider B, so that the third power is When the unit is in operation, the support plate and the first rotation module 100 and the second rotation module 200 are horizontally moved horizontally through the lead screw-slider unit.

As shown in FIG. 6 , the vertical lifting mechanism 400 includes at least one set of scissor lifting platforms, and the scissor lifting platforms are vertically stacked. Each set of scissor lifting platforms includes a fourth bottom plate 410 and is disposed on the fourth bottom plate 410. The fourth power unit 420 and the screw-slider unit, the two sets of support rods, the screw-slider unit, as described above, including at least one lead screw A and through The slider B provided by the screw A, the fourth power unit 420 is a motor, the output end of the fourth power unit 420 is axially rotatably connected with the screw or the operating coupling, and each set of support rods includes a scissor fork hinge A fixing rod 431 and a free rod 432 are connected, and the bottom of the free rod 432 is fixed on the slider B. The bottom of the fixing rod 431 is fixedly connected with the scissor lifting platform, and the top of the free rod 432 and the fixing rod 431 are respectively separated from the upper layer. The fourth bottom plate of the lifting platform is fixedly connected.

When no correction is performed, as shown in FIG. 8, the entire vertical lifting mechanism 400 is in a compressed state, and the overall occupied space is small, which is convenient for storage. When the correction is performed, as shown in FIG. 9, the fourth power unit 420 is passed to each layer. Sending the command, each motor power unit drives the slider B to move on the screw A, and then the free rod 432 fixed on the slider B follows the movement. Since the free rod 432 is hingedly connected with the fixed rod 432, the fixed rod 432 is moved, Finally, each set of scissor lift platforms can be raised to a certain height according to the command. Finally, the first rotating module 100 can be transported to a position parallel to the central axis of the PET setting. At this time, the rod source body is mounted on the clamp 220 of the second rotating module 200, and then, as shown in FIG. 7, the third power unit is given. 320 sends an instruction, the third power unit 320 drives the slider B to move horizontally on the lead screw, thereby driving the support plate 330 and the first rotating module and the second rotating module mounted on the supporting plate 330 to horizontally move, thereby making the rod source The body can travel axially into the interior of the detector ring for subsequent rotation and rotation about the central axis for normalization of the detector.

The above-mentioned screw-slider unit is respectively provided with two sets of limit components C to determine the maximum stroke of the slider B on the lead screw A, and the limit component C is a proximity switch, which are respectively arranged in the opposite direction of the lead screw. When the slider B moves to the vicinity of the limit switch, the limit switch is triggered to send a signal to the control unit. After receiving the command, the control unit determines that the slider B has reached the limit position, and sends a command to control the motor to reverse, so that the slider B returns. Preferably, the stroke of the vertical lifting mechanism 400 is higher than the height of the central axis of the PET main body so that the first rotating unit moves to a position coaxial with the PET main body, and the stroke of the horizontal moving mechanism 300 is not less than the thickness of a detector ring to The rod source body 500 is axially withdrawn or pushed into the PET main unit.

The invention also discloses a PET device comprising at least one detector ring, and the PET imaging rod source device as described above, so that the normalized correction of the PET device before and after the factory can be conveniently and quickly performed.

The above description of the embodiments is intended to facilitate the understanding and use of the invention by those skilled in the art. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the general principles described herein can be applied to other embodiments without the inventive work. Therefore, the present invention is not limited to the embodiments described above, and those skilled in the art should be able to make modifications and changes within the scope of the invention without departing from the scope of the invention.

Claims

A PET imaging rod source device, comprising a rod source body, further comprising: a first rotating module for driving the rod source body to rotate uniformly around the axial direction; and a second rotating module for driving the rod source body to rotate;

The output end of the second rotating module is disposed parallel to the axial direction, and the output end of the second rotating module is axially connected to the rod source body to drive the rod source body to rotate;

The first rotating module includes a first power component, a first power component, and a rotating arm structure, the first power component is disposed parallel to the axial direction, and the rotating arm structure is disposed perpendicular to the axial direction, the first a power assembly and the rotating arm structure are drivingly coupled via the first transmission assembly, the second rotating module being fixed to an end of the rotating arm structure away from the first transmission assembly to follow the first power assembly The movement drives the rod source body to rotate about the axial direction.
The PET imaging rod source device according to claim 1, wherein the rotating arm structure comprises an arm joint, a rotating arm body and a positioning card slot, and one end of the rotating arm body passes through the arm joint Removably connected to the first transmission component, a positioning card slot is disposed at an end of the rotating arm body away from the first transmission component, and the second rotation module is provided with a positioning joint corresponding to the positioning card slot to be fixed to the Rotating arm structure.
The PET imaging rod source device according to claim 1 or 2, wherein the rotating arm structure is a variable length structure, and the rotating arm body includes an active arm detachably coupled to the first transmission assembly and at least a long arm, the active arm is disposed at a position away from the first transmission component, and the positioning arm is provided with a positioning joint at one end and a positioning card slot at the other end, and the lengthening and lengthening between the active arm and the extension arm The arm and the extension arm are detachably connected between the active arm or the extension arm and the second rotation module via the positioning card slot and the positioning joint.
The PET imaging rod source device according to claim 3, wherein the positioning card slot is a shallow groove of a U-shaped opening, and the positioning joint corresponds to a U-shaped joint, the shallow groove and the U-shaped joint. A positioning hole and a locking hole are respectively provided for a fixed connection between the rotating arm body and the second rotating module or the rotating arm body.
The PET imaging rod source device according to claim 1, wherein said second rotation module comprises a second power assembly and/or a clamp fixed to said second power assembly output, said power assembly The output end is directly connected to the rod source body or via the clamp to the rod source body to drive the rod source body to rotate under the driving of the second power unit.
A PET imaging rod source device according to claim 1, further comprising a transmission module for moving said rod source body to a designated position, said transmission module comprising a vertical lifting mechanism and a horizontal moving mechanism The first power component of the first rotating module is disposed on the horizontal moving mechanism, and the rotating arm structure of the first rotating module is disposed outside the horizontal moving mechanism to drive the bar source body Following the horizontal movement mechanism to advance or retreat axially, the horizontal movement mechanism is disposed on the vertical lifting mechanism to drive the rod source body to follow the vertical rise The descending mechanism rises or falls vertically.
The PET imaging rod source device according to claim 6, wherein the horizontal moving mechanism comprises a third bottom plate, a third power unit and a screw-slider unit fixed to the bottom plate, and a fixing base. a support plate of the first rotating module, the lead screw-slider unit includes at least one lead screw and a slider disposed through the lead screw, and an output end of the third power unit is axially rotatably connected to the lead screw, The upper bottom surface of the support plate is fixedly connected to the first power component and the first transmission component, and the lower bottom surface of the support plate is disposed on the slider to drive the motor under the driving of the third power unit. The rod source body moves horizontally in the axial direction.
The PET imaging rod source device according to claim 6, wherein the vertical lifting mechanism comprises at least one set of scissor lifting platforms, and the scissor lifting platforms are vertically stacked and fixedly arranged, and each set of scissor type The lifting platform includes a fourth bottom plate, a fourth power unit disposed on the fourth bottom plate, and a screw-slider unit, two sets of support rods, the lead screw-slider unit including at least one lead screw and passing through a slider disposed on the lead screw, an output end of the fourth power unit is axially rotatably coupled to the lead screw, and each set of support rods includes a fixed rod and a free rod of a scissor fork hinged connection The bottom of the free rod is fixed on the slider, the bottom of the fixing rod is fixed on the scissor lifting platform of the layer, and the top of the free rod and the top of the fixed rod respectively and the upper scissor lifting platform The fourth bottom plate is fixedly connected.
The PET imaging rod source device according to claim 7 or 8, wherein the lead screw-slider unit further comprises two sets of limit assemblies to limit the maximum stroke of the slider on the lead screw.
A PET apparatus comprising at least one detector ring, characterized by further comprising the PET imaging rod source device according to any one of claims 1 to 9, the stroke of the vertical lifting mechanism being higher than the center of the PET device The shaft is disposed at a height from the ground such that the first power unit rises vertically to a position coaxial with the PET device, and the stroke of the horizontal moving mechanism is not less than a thickness setting of the detector ring to axially move the rod source body Push in or out of the PET device.