Multi-probe imaging mechanism of full-ring SPECT-CT equipment

Abstract

The invention discloses a multi-probe imaging mechanism of full-ring SPECT-CT equipment. The multi-probe imaging mechanism comprises an annular mounting disc, a plurality of probes and a plurality of probe driving assemblies, the number of the probes and the number of the probe driving assemblies are both 3-9, and the probes and the probe driving assemblies are in one-to-one correspondence. The plurality of probes are uniformly distributed in the circumferential direction of the annular mounting disc, each probe is movably arranged on the annular mounting disc in the radial direction of the annular mounting disc through the corresponding probe driving assembly, and the probe driving assemblies are used for driving the probes to move. The problems that most of existing SPECT-CT devices are single-group or double-group probes and cannot fully cover organs of the whole body of the human body, the probes need to be frequently adjusted for one-by-one detection when different organs are detected, and the whole body detection efficiency is low are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear medicine imaging, in particular to a multi-probe imaging mechanism of a full-ring SPECT-CT device. BACKGROUND

[0002] The existing SPECT-CT device is a gamma ray detection device for nuclear medical imaging, and its core structure is usually composed of a single set or double sets of probes. The detection of gamma rays and signal conversion are completed by the probes, so as to realize the examination of human organs. However, in the actual examination process, the angle or position of the probe needs to be adjusted in time for different organs of different parts of the human body. Since the single set or double sets of probes cannot fully cover all organs of the human body, the angle or position of the probe needs to be adjusted constantly for detection one by one when examining different organs, which directly leads to low efficiency of examination of organs of the whole human body. SUMMARY

[0003] In view of the above defects, the present application provides a multi-probe imaging mechanism of a full-ring SPECT-CT device, which aims to solve the problem that the existing SPECT-CT device is usually composed of a single set or double sets of probes, which cannot fully cover all organs of the human body, and the probe needs to be adjusted frequently for detection one by one when examining different organs, resulting in low efficiency of whole body examination.

[0004] In order to achieve this goal, the present application adopts the following technical scheme: A multi-probe imaging mechanism of a full-ring SPECT-CT device, comprising a circular ring mounting disc, a plurality of probes and a plurality of probe driving assemblies; the number of the probes and the probe driving assemblies is 3-9, and the probes and the probe driving assemblies are one-to-one corresponding; A plurality of probes are uniformly distributed along the circumferential direction of the circular ring mounting disc, and each probe is movably arranged on the circular ring mounting disc along the radial direction of the circular ring mounting disc through the corresponding probe driving assembly, and the probe driving assembly is used for driving the probe to move.

[0005] Preferably, the probe comprises a collimator, a shielding box, an electronic box and a detector; the collimator is arranged at the bottom of the shielding box, the detector is arranged in the inside of the shielding box, and the detector is located at one side close to the top inside of the shielding box; the electronic box is mounted on the outside top of the shielding box, and the electronic box is electrically connected with the detector.

[0006] Preferably, the collimator comprises a shielding light transmission plate, a shielding pinhole plate, a servo motor, a swing arm, four guide rails and four guide blocks, the shielding light transmission plate is provided with a light transmission opening, and the shielding pinhole plate is provided with a plurality of conical pinholes. The shielding light transmission plate is installed at the bottom of the shielding box, the light transmission opening is communicated with the inside of the shielding box, and the servo motor is installed at the rear side of the shielding light transmission plate.

[0007] Preferably, the collimator further comprises two limiting induction sheets and two slot photoelectric switches; the two limiting induction sheets are respectively installed at the front and rear sides of the shielding pinhole plate, and the two limiting induction sheets are symmetrically distributed front and rear; the two slot photoelectric switches are respectively installed at the front and rear sides of the shielding light transmission plate, and the two slot photoelectric switches are symmetrically distributed front and rear; each limiting induction sheet corresponds to one slot photoelectric switch.

[0008] Preferably, the collimator further comprises a connecting block, and the other end of the swing arm is connected to the rear side of the shielding pinhole plate through the connecting block.

[0009] Preferably, the probe further comprises a mounting frame, and the mounting frame comprises a bottom frame, a left side frame and a right side frame; the bottom of the left side frame and the bottom of the right side frame are respectively fixed to the left and right sides of the top of the bottom frame, the left side frame and the right side frame are respectively installed on the left and right sides of the top of the shielding box, and the electronic box is located between the left side frame and the right side frame.

[0010] Preferably, the probe driving assembly comprises a lead screw module, two slide rails and six sliding blocks, the lead screw module comprises a lead screw motor, a lead screw and a lead screw nut; The lead screw motor and the two slide rails are installed on the circular mounting disc, one end of the lead screw is connected to the driving end of the lead screw motor, the two slide rails are symmetrically distributed on the left and right sides of the lead screw, and the lead screw and the two slide rails are arranged along the radial direction of the circular mounting disc; the lead screw nut is sleeved on the lead screw and is in threaded connection with the lead screw; the two slide rails are respectively provided with three slidable sliding blocks, and the bottom of the bottom frame is connected with the lead screw nut and the six sliding blocks.

[0011] The technical scheme provided by the present application can include the following beneficial effects: The present scheme is characterized in that a circular mounting disc and 3-9 probes are arranged, the 3-9 probes are evenly distributed along the circumferential direction of the circular mounting disc, and each probe can move along the radial direction of the circular mounting disc, thereby constructing a detection structure that can flexibly adapt to different detection requirements. When it is necessary to perform a full coverage detection on the human body organs, all the probes can be first driven to move to the farthest position of the radial movement of the probes, and then the circular mounting disc is driven to rotate, thereby driving the probes to synchronously rotate to a preset rotation target angle, so that a full coverage synchronous detection on the human body organs is realized. Compared with the traditional single group or double group probe structure, the present scheme effectively solves the technical pain point that the traditional structure cannot fully cover the human body organs, and eliminates the operation process of repeatedly adjusting the position and angle of the probes for each human organ, thereby greatly improving the detection efficiency of the human body organs. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic view of a multi-probe imaging mechanism of a full-ring SPECT-CT device; Figure 2 is a schematic view of one of the embodiments in the present application; Figure 3 is an exploded view of one of the embodiments in the present application; Figure 4 is an exploded view of a probe of one of the embodiments in the present application.

[0013] In the present application, 1 is a circular mounting disc, 2 is a probe, 3 is a probe driving assembly, 21 is a collimator, 22 is a shielding box, 23 is an electronic box, 24 is a detector, 25 is a mounting frame, 31 is a screw module, 32 is a sliding rail, 33 is a sliding block, 211 is a shielding light transmission plate, 212 is a shielding pinhole plate, 213 is a servo motor, 214 is a swing arm, 215 is a guide rail, 216 is a guide block, 217 is a limit sensing sheet, 218 is a slot photoelectric switch, 219 is a connecting block, 251 is a bottom frame, 252 is a left side frame, 253 is a right side frame, 311 is a screw motor, 312 is a screw rod, 2100 is a light transmission port, and 2110 is a conical pinhole. DETAILED DESCRIPTION

[0014] The technical scheme of the present application will be further described below in combination with the drawings and through specific embodiments.

[0015] In the description of the present application, it needs to be understood that the terms "length", "middle", "upper", "lower", "left", "right", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0016] In the description of the present application, it needs to be understood that the terms "installation", "splicing", "connection" should be understood broadly unless otherwise explicitly specified and limited, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0017] A multi-probe imaging mechanism of a full-ring SPECT-CT device, comprising a circular ring mounting disc 1, a plurality of probes 2 and a plurality of probe driving assemblies 3; the number of the probes 2 and the probe driving assemblies 3 is 3-9, and the probe 2 and the probe driving assembly 3 correspond one by one; A plurality of probes 2 are uniformly distributed along the circumferential direction of the circular ring mounting disc 1, and each probe 2 is movably arranged on the circular ring mounting disc 1 along the radial direction of the circular ring mounting disc 1 through the corresponding probe driving assembly 3, and the probe driving assembly 3 is used for driving the probe 2 to move.

[0018] The multi-probe imaging mechanism of the full-ring SPECT-CT device of the present application, in the embodiment, as shown in Figure 1 The number of the probes 2 and the probe driving assemblies 3 is set to nine. The multi-probe imaging mechanism further comprises a controller (not labeled in the figure) and a motor (not labeled in the figure) for driving the circular ring mounting disc 1 to rotate, and the controller is in communication connection with the motor and each probe driving assembly 3, and the staff can set the farthest position of the probe radial movement, the nearest position of the probe radial movement and the rotation target angle on the controller in advance. Since nine probes 2 are uniformly distributed along the circumferential direction of the circular ring mounting disc 1, when it is necessary to perform coverage examination on the human body organs, as shown in Figure 2As shown, nine of the probe driving assemblies 3 can be started first, the controller sends corresponding control instructions to each of the probe driving assemblies 3, and each of the probe driving assemblies 3 drives the corresponding probe 2 to move to the farthest position of the probe radial movement; then, the motor is started, the controller sends a control instruction to the motor, and the motor drives the circular ring mounting disc 1 to rotate to a preset rotation target angle of 40°, at which time the detection range of the nine probes 2 can completely cover the cross section of the human body. When it is necessary to check the local key organs of the human body, such as Figure 1 As shown, nine of the probe driving assemblies 3 can be started first, the controller sends corresponding control instructions to each of the probe driving assemblies 3, and each of the probe driving assemblies 3 drives the corresponding probe 2 to move to the farthest position of the probe radial movement; then, the motor is started, the controller sends a control instruction to the motor, and the motor drives the circular ring mounting disc 1 to rotate to a preset rotation target angle of 40°, at which time the detection range of the nine probes 2 can completely cover the cross section of the human body. When it is necessary to check the local key organs of the human body, such as

[0019] In this scheme, the circular ring mounting disc 1 and the 3-9 probes 2 are arranged, the 3-9 probes 2 are evenly distributed along the circumferential direction of the circular ring mounting disc 1, and each of the probes 2 can move in the radial direction of the circular ring mounting disc 1, thereby constructing a detection structure that flexibly adapts to different checking requirements. When it is necessary to check the organs of the human body, all of the probes 2 can be driven to move to the farthest position of the probe radial movement, and then the circular ring mounting disc 1 is driven to rotate, thereby driving each of the probes 2 to rotate to a preset rotation target angle synchronously, and full coverage synchronous checking of the organs of the human body is realized. Compared with the traditional single group or double group probe structure, the circumferential uniform arrangement design of the 3-9 groups of probes effectively solves the technical pain point that the traditional structure cannot fully cover the organs of the human body, and the operation process of repeatedly adjusting the position and angle of the probe for each organ of the human body is saved, thereby greatly improving the checking efficiency of the organs of the human body.

[0020] Preferably, the probe 2 comprises a collimator 21, a shielding box 22, an electronic box 23, and a detector 24; the collimator 21 is arranged at the bottom of the shielding box 22, the detector 24 is arranged inside the shielding box 22, the detector 24 is located on the side close to the inner top of the shielding box 22; the electronic box 23 is mounted on the outer top of the shielding box 22, and the electronic box 23 is electrically connected with the detector 24.

[0021] In this embodiment, as shown in Figures 3-4As shown, when the human body is examined, the external rays are first screened by the collimator 21, which can limit the incident direction and range of effective rays, filter out random invalid rays, and ensure that the screened rays can be accurately projected to the detector 24 inside the shielding box 22, providing a high-quality ray source for subsequent signal acquisition; then, the detector 24 transmits the collected detection signals to the electronic box 23, which completes signal processing to form high-quality data that can be used for imaging.

[0022] Further explanation, the shielding box 22 isolates the detector 24 from the external environment, which can effectively block external stray rays and reduce the influence of background noise on the detection signal. The targeted screening function of the collimator 21 can further eliminate invalid rays and reduce the mixing of noise signals, thereby improving the signal-to-noise ratio of the detection signal.

[0023] Preferably, the collimator 21 comprises a shielding light transmission plate 211, a shielding pinhole plate 212, a servo motor 213, a swing arm 214, four guide rails 215 and four guide blocks 216, the shielding light transmission plate 211 is provided with a light transmission opening 2110, and the shielding pinhole plate 212 is provided with a plurality of conical pinholes 2120. The shielding light transmission plate 211 is installed at the bottom of the shielding box 22, the light transmission opening 2110 is in communication with the inside of the shielding box 22, and the servo motor 213 is installed at the rear side of the shielding light transmission plate 211; four guide rails 215 are arranged in the front-rear direction; two guide rails 215 are installed on the left and right sides of the bottom of the shielding light transmission plate 211, respectively, and the two guide rails 215 on the same side are distributed in front of and behind each other; four guide blocks 216 are respectively installed on the corresponding guide rails 215 in a front-rear sliding manner, the shielding pinhole plate 212 is connected with the four guide blocks 216, one end of the swing arm 214 is connected to the driving end of the servo motor 213, and the other end of the swing arm 214 is connected to the rear side of the shielding pinhole plate 212.

[0024] In this embodiment, as Figure 4As shown, the controller is electrically connected with the servo motor 213, and a staff can set a target imaging position on the controller in advance. When the shielded pinhole plate 212 needs to be moved to achieve examination of a human organ, the servo motor 213 is started, the controller sends a corresponding control instruction to the servo motor 213, and the servo motor 213 drives the swing arm 214 to swing after receiving the control instruction, thereby driving the shielded pinhole plate 212 to slide to the preset target imaging position in the front-rear direction. At this time, external rays first pass through the corresponding conical pinholes 2120 on the shielded pinhole plate 212 to complete screening, and then pass through the light transmission holes 2100 on the shielded light transmission plate 211 to be accurately projected to the detector 24 inside the shielded box 22. According to this ray transmission path, the detector 24 can achieve examination of a target organ when being close to a human body region.

[0025] Further explanation, the four guide rails 215 and the four guide blocks 216 are arranged to make the movement of the shielded pinhole plate 212 more stable.

[0026] Preferably, the collimator 21 further comprises two limit inductive sheets 217 and two slot photoelectric switches 218; the two limit inductive sheets 217 are respectively installed on the front and rear sides of the shielded pinhole plate 212, and the two limit inductive sheets 217 are symmetrically distributed in front and back; the two slot photoelectric switches 218 are respectively installed on the front and rear sides of the shielded light transmission plate 211, and the two slot photoelectric switches 218 are symmetrically distributed in front and back; each limit inductive sheet 217 corresponds to one slot photoelectric switch 218.

[0027] In this embodiment, as shown in Figure 4 The controller is electrically connected with the two slot photoelectric switches 218. During the sliding process of the shielded pinhole plate 212 relative to the shielded light transmission plate 211, when the limit inductive sheet 217 on the shielded pinhole plate 212 contacts the corresponding slot photoelectric switch 218, the slot photoelectric switch 6 is triggered and generates an in-place induction signal in real time, and the signal is transmitted to the controller in real time. After receiving the in-place induction signal, the controller triggers the brake instruction of the servo motor 213 to quickly stop the sliding of the shielded pinhole plate 212, thereby achieving the limiting of the shielded pinhole plate 212.

[0028] Preferably, the collimator 21 further comprises a connecting block 219, and the other end of the swing arm 214 is connected to the rear side of the shielded pinhole plate 212 through the connecting block 219. In this embodiment, as shown in Figure 4As shown, the arrangement of the connecting block 219 can effectively disperse the stress of the swing arm 214 and the shielding pinhole plate 212, avoiding the deformation of the shielding pinhole plate 212 or the wear of the end of the swing arm 214 caused by stress concentration when the swing arm 214 is directly connected.

[0029] Preferably, the probe 2 further comprises a mounting frame 25, which comprises a bottom frame 251, a left side frame 252 and a right side frame 253; the bottom of the left side frame 252 and the bottom of the right side frame 253 are respectively fixed to the left and right sides of the top of the bottom frame 251, the left side frame 252 and the right side frame 253 are respectively installed on the left and right sides of the top of the shielding box 22, and the electronic box 23 is located between the left side frame 252 and the right side frame 253. In this embodiment, as shown in the figure, the mounting frame 25 adopts a symmetrical frame design of "bottom frame and double side frames", which can effectively disperse the self weight of the probe 2 and the vibration load in the moving process. Figure 3 As shown, the mounting frame 25 adopts a symmetrical frame design of "bottom frame and double side frames", which can effectively disperse the self weight of the probe 2 and the vibration load in the moving process. Since the electronic box 23 is located between the left side frame 252 and the right side frame 253, forming an independent installation area of "frame-enclosed type", this layout makes the positions of the electronic box 23, the collimator 21 and the shielding box 22 relatively fixed, facilitating the cable connection between the components and reducing the cross-winding of the cables.

[0030] Preferably, the probe driving assembly 3 comprises a lead screw module 31, two slide rails 32 and six sliding blocks 33; the lead screw module 31 comprises a lead screw motor 311, a lead screw 312 and a lead screw nut (not labeled in the figure); the lead screw motor 311 and the two slide rails 32 are both installed on the circular mounting disc 1, one end of the lead screw 312 is connected with the driving end of the lead screw motor 311, the two slide rails 32 are symmetrically distributed on the left and right sides of the lead screw 312, and the lead screw 312 and the two slide rails 32 are both arranged along the radial direction of the circular mounting disc 1; the lead screw nut is sleeved on the lead screw 312 and is in threaded connection with the lead screw 312; the two slide rails 32 are respectively provided with three sliding blocks 33, and the bottom of the bottom frame 251 is connected with the lead screw nut and the six sliding blocks 33.

[0031] In this embodiment, as shown in the figure, Figure 3As shown, the lead screw motor 311 specifically adopts a rotary motor. When it is required to drive the probe 2 to move along the radial direction of the circular mounting disc 1, the lead screw motor 311 is first started to drive the lead screw 312 to rotate synchronously; based on the screw transmission screw motion conversion principle, the rotary motion of the lead screw 312 can be converted into the linear motion of the lead screw nut along the axial direction of the lead screw 312; since the bottom of the chassis 251 is connected with the lead screw nut and the six sliding blocks 33, the linear motion of the lead screw nut can drive the chassis 251 to move stably along the slide rail 32, thereby realizing the movement of the probe 2 along the radial direction of the circular mounting disc 1.

[0032] Further, the arrangement of the two slide rails 32 and the six sliding blocks 33 can make the movement of the chassis 251 more stable.

[0033] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative efforts, and these embodiments will all fall within the protection scope of the present application.

Claims

1. A multi-probe imaging mechanism for a full-ring SPECT-CT device, characterized in that: It includes a circular mounting plate, several probes, and several probe driving assemblies; the number of probes and probe driving assemblies is 3 to 9, and there is a one-to-one correspondence between the probes and the probe driving assemblies; A plurality of probes are evenly distributed along the circumference of the annular mounting disk. Each probe is movably mounted on the annular mounting disk along the radial direction of the annular mounting disk by a corresponding probe driving assembly. The probe driving assembly is used to drive the probe to move.

2. The multi-probe imaging mechanism of a full-ring SPECT-CT device according to claim 1, characterized in that: The probe includes a collimator, a shielding box, an electronic box, and a detector; The collimator is located at the bottom of the shielded box, the detector is located inside the shielded box, and the detector is located on the side near the top of the shielded box; the electronic box is installed on the top of the shielded box, and the electronic box is electrically connected to the detector.

3. The multi-probe imaging mechanism of a full-ring SPECT-CT device according to claim 2, characterized in that: The collimator includes a light-transmitting shield, a pinhole shield, a servo motor, a swing arm, four guide rails, and four guide blocks. The light-transmitting shield has a light-transmitting opening, and the pinhole shield has a plurality of conical pinholes. The shielding light-transmitting plate is installed at the bottom of the shielding box, and the light-transmitting opening is connected to the interior of the shielding box. The servo motor is installed on the rear side of the shielding light-transmitting plate. The four guide rails are all arranged in the front-back direction. Two guide rails are installed on the left and right sides of the bottom of the shielding light-transmitting plate, and the two guide rails on the same side are symmetrically distributed front-back. The four guide blocks are slidably installed on the corresponding guide rails. The shielding pinhole plate is connected to the four guide blocks. One end of the swing arm is connected to the drive end of the servo motor, and the other end of the swing arm is connected to the rear side of the shielding pinhole plate.

4. The multi-probe imaging mechanism of a full-ring SPECT-CT device according to claim 3, characterized in that: The collimator also includes two limit sensing plates and two slotted photoelectric switches; Two limiting sensors are respectively installed on the front and rear sides of the shielded pinhole plate, and the two limiting sensors are symmetrically distributed front and back; two slotted photoelectric switches are respectively installed on the front and rear sides of the shielded light-transmitting plate, and the two slotted photoelectric switches are symmetrically distributed front and back; each limiting sensor corresponds to one slotted photoelectric switch.

5. The multi-probe imaging mechanism of a full-ring SPECT-CT device according to claim 4, characterized in that: The collimator also includes a connecting block, and the other end of the swing arm is connected to the rear side of the shielding pinhole plate through the connecting block.

6. The multi-probe imaging mechanism of a full-ring SPECT-CT device according to claim 3, characterized in that: The probe also includes a mounting frame, which includes a base frame, a left side frame, and a right side frame. The bottom of the left side frame and the bottom of the right side frame are respectively fixed to the left and right sides of the top of the base frame. The left side frame and the right side frame are respectively installed on the left and right sides of the top of the shielding box. The electronic box is located between the left side frame and the right side frame.

7. The multi-probe imaging mechanism of a full-ring SPECT-CT device according to claim 6, characterized in that: The probe drive assembly includes a lead screw module, two slide rails, and six sliders. The lead screw module includes a lead screw motor, a lead screw, and a lead screw nut. The lead screw motor and the two slide rails are both mounted on the annular mounting plate. One end of the lead screw is connected to the drive end of the lead screw motor. The two slide rails are symmetrically distributed on the left and right sides of the lead screw. The lead screw and the two slide rails are arranged along the radial direction of the annular mounting plate. The lead screw nut is sleeved on the lead screw and threadedly connected to the lead screw. Each of the two slide rails is equipped with three slidable sliders. The bottom of the base frame is connected to the lead screw nut and six sliders.

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