CN210095757U - Linear and spatial resolution tester for single photon emission computed tomography device - Google Patents
Linear and spatial resolution tester for single photon emission computed tomography device Download PDFInfo
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- CN210095757U CN210095757U CN201920439129.0U CN201920439129U CN210095757U CN 210095757 U CN210095757 U CN 210095757U CN 201920439129 U CN201920439129 U CN 201920439129U CN 210095757 U CN210095757 U CN 210095757U
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- 238000002603 single-photon emission computed tomography Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 40
- 239000010937 tungsten Substances 0.000 claims abstract description 40
- 230000033001 locomotion Effects 0.000 claims description 27
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 2
- 230000004044 response Effects 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 description 29
- 239000004417 polycarbonate Substances 0.000 description 29
- 238000004891 communication Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000002285 radioactive effect Effects 0.000 description 4
- 238000004353 relayed correlation spectroscopy Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000003908 quality control method Methods 0.000 description 3
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical compound ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229940121896 radiopharmaceutical Drugs 0.000 description 1
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- 239000000523 sample Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a single photon emission computed tomography device linearity and spatial resolution tester, which comprises a bracket, a shielding device control system and a remote control system; the bracket is used for supporting the shielding device and the shielding device control system which are connected through a wire, and the shielding device control system is connected with the remote control system through a wireless way; the shielding device comprises a PC base, a tungsten steel top cover is arranged on the left half part of the PC base, a middle shielding body and a lower baffle of a tungsten steel sleeve are arranged on the left half part of the PC base, the middle shielding body comprises the tungsten steel sleeve and a customized measuring cup arranged in the tungsten steel sleeve, a PC sliding block is arranged in the PC base, the lower baffle of the tungsten steel sleeve is fixed on the PC sliding block, the PC sliding block is driven by positive and negative rotation of a motor to slide left and right, the lower baffle of the tungsten steel sleeve is driven to shield or not shield the bottom of the tungsten steel sleeve, and accurate positioning of the lower baffle of the tungsten steel sleeve is realized by combining a stop light touch travel switch.
Description
Technical Field
The utility model relates to a radiation protection field especially relates to a single photon emission computed tomography device linearity and spatial resolution tester.
Background
According to the national standard gamma camera for radionuclide imaging device Performance and test rules GB/T18989-2013, NEMA Standard publication gamma camera Performance test (NEMA NU 1Performance Measurements of Gamma Cameras) andthe issued sanitary industry standard gamma camera and single photon emission tomography (SPECT) quality control detection specification needs the inherent spatial resolution and the inherent linear index to carry out on-site detection in the quality control and performance detection of the SPECT equipment. Radiopharmaceuticals required in the test due to these 2 criteria99mThe Tc activity is large, basically about 370MBq,99mthe energy peak of Tc emitted gamma ray is 0.140MeV, the irradiation dose to the detecting personnel of SPECT equipment quality control is larger, and the maximum dose rate at the position 5mm away from the radioactive source is more than 10 mSv/h.
The scheme basically adopted when the intrinsic spatial resolution and the intrinsic linear index are tested at present is to manually place a radioactive source, and the radioactive source is a bare source and has no protective measures.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the above-mentioned weak point that exists among the prior art.
In order to achieve the above object, the present invention provides a single photon emission computed tomography apparatus linearity and spatial resolution tester, which comprises a support, a shielding device control system and a remote control system; the bracket is used for supporting the shielding device and the shielding device control system which are connected through a wire, and the shielding device control system is connected with the remote control system through a wireless way; the shielding device at least comprises a PC base, and the PC base comprises a sliding motion cabin and a motor control cabin positioned in front of the sliding motion cabin; the left half part of the sliding motion cabin is provided with a PC sliding block, the left half part of the PC sliding block is fixed with a tungsten steel sleeve lower baffle plate, and the right half part of the PC sliding block is fixed with a micro-motion sliding rack through a rack fixing screw; a positioning block is arranged in the middle of the sliding motion bin and is fixed by a screw through the positioning block; the right half part of the sliding motion bin is provided with a backward stop light-touch travel switch and a forward stop light-touch travel switch which are fixed above the micro sliding rack, wherein the backward stop light-touch travel switch is fixed at the upper end of the side wall of the positioning block and clings to the rear side wall of the sliding motion bin, and the forward stop light-touch travel switch is positioned at the right side of the micro sliding rack; the motor control bin is communicated with the right half part of the sliding motion bin, the micro motor is fixed on a motor fixing frame, the motor fixing frame is fixed on a partition plate between the motor control bin and the sliding motion bin, the rear end of the micro motor is connected with a micro pinion, and the micro pinion is linked with a micro sliding rack and pinion.
Preferably, the shielding device further comprises a tungsten steel top cover, a middle shielding body and a tungsten steel sleeve lower baffle plate, wherein the middle shielding body comprises a tungsten steel sleeve and a customized measuring cup arranged in the tungsten steel sleeve.
Preferably, the PC base is further provided with an upper cover, the left side of the PC upper cover is provided with a shielding device mounting opening, the right side of the PC upper cover is provided with an upward protruding fixing part, and the fixing part is provided with a cross rod through hole penetrating through the left side and the right side and used for penetrating through a cross rod of the support.
Preferably, the fixed part is further provided with a cross rod screw hole, and a cross rod hand control screw is screwed into the cross rod screw hole for fixing the cross rod.
Preferably, the shell of the motor control cabin is provided with an external device air socket-male connector, the power control box is provided with a shielding signal wire, and the shielding signal wire is provided with an external device air socket-female connector which is matched with the external device air socket-male connector for use.
Preferably, the control system of the shielding device is controlled by a motor to open and close the baffle and receive a command sent by a remote control end.
The utility model discloses a wireless communication combines simultaneously to retreat the locking and dabs travel switch and the locking that advances to dabber travel switch automatic control shield assembly below the accurate opening and the closure of the tungsten steel cover lower plate washer.
Drawings
Fig. 1 is a schematic structural diagram of a tripod according to an embodiment of the present invention;
fig. 2 is an exploded view of a shielding system according to an embodiment of the present invention;
fig. 3 is an external view of a shielding system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the internal structure of the bit mask system;
fig. 5 is a cross-sectional view of a shielding apparatus according to an embodiment of the present invention;
FIG. 6 is a view showing the positional relationship of the micro pinion, PC slider and rack set screw when closed;
FIG. 7 is a view showing the positional relationship of the jog pinion and the PC slider when opened;
fig. 8 is a schematic view of a control motor of a retreat stop tact travel switch according to an embodiment of the present invention;
fig. 9 is a schematic diagram of the internal structure of the power control box.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1-9, an embodiment of the present invention provides a single photon emission computed tomography apparatus linearity and spatial resolution tester, which includes a support, a shielding system control system, and a remote control system.
The support consists of a tripod, a vertical rod and a cross rod, wherein the vertical rod is vertically erected on the tripod, and the cross rod is arranged on the vertical rod. Wherein the cross bar is matched with a special groove of a shielding system to prevent the equipment from falling off. As the radioactive source needs to be placed at a distance of more than 1.5m from the surface of the SPECT probe in the detection process, the bracket mainly plays a role in placing the shielding device at a distance of more than 2.4m from the ground and playing a supporting role.
The shielding device comprises: the tungsten steel shield at least comprises a tungsten steel top cover 2, a middle shield body and a tungsten steel sleeve lower baffle plate 10, wherein the middle shield body comprises a tungsten steel sleeve 4 and a customized measuring cup 3 arranged in the tungsten steel sleeve.
High strength Polycarbonate (PC) upper cover 5, the left side of PC upper cover 5 is provided with the shield assembly installing port, and the right side of PC upper cover 5 is provided with the fixed part that makes progress outstanding, is provided with the horizontal pole via hole 17 that runs through the left and right sides on the fixed part for pass the horizontal pole of support.
In one example, a rail screw hole 16 is further provided on the fixing portion, and a rail hand screw 15 is screwed into the rail screw hole 16 for fixing the rail.
The shielding device further comprises a PC base comprising a sliding motion compartment 13 and a motor control compartment 27 located in front of the sliding motion compartment 13. Wherein, the PC upper cover 5 is buckled and fixed with the PC base through a PC upper cover screw 18.
The left half part of the sliding motion cabin 13 is provided with a PC slide block 11, the left half part of the PC slide block 11 is fixed with a tungsten steel sleeve lower baffle plate 10, and the right half part of the PC slide block 11 is fixed with a micro-motion sliding rack 20 through a rack fixing screw 19.
A positioning block 23 is arranged in the middle of the sliding motion bin 13 and is fixed by a screw 21 through the positioning block.
The right half part of the sliding motion bin 13 is provided with a backward stop tact switch 24 and a forward stop tact switch 25 which are fixed above the micro sliding rack 20, wherein the backward stop tact switch 24 is fixed at the upper end of the side wall of the positioning block 23 and clings to the rear side wall of the sliding motion bin 13, and the forward stop tact switch 25 is positioned at the right side of the micro sliding rack 20.
The motor control bin 27 is communicated with the right half part of the sliding motion bin 13, the micro motor 9-1 is fixed on a motor fixing frame 8, the motor fixing frame 8 is fixed on a clapboard between the motor control bin 27 and the sliding motion bin 13, the rear end of the micro motor 9-1 is connected with a micro-motion pinion 6, the micro-motion pinion 6 is in gear linkage with the micro-motion sliding rack 20,
the positioning block 23 is fixed in the middle of the groove of the sliding movement bin 13 by using the positioning block screw 21 and the other end screw, and after the fixing, the PC slider 11 is pressed by the positioning block 23 to prevent the PC slider 11 from moving up and down.
As shown in figure 6, the micro pinion 6 has transmission kinetic energy by the forward rotation of the micro motor 9-1, because the micro pinion 6 and the micro sliding rack 20 are in the meshing relationship between gears, when the micro pinion 6 rotates, the PC slider 11 and the tungsten steel sleeve lower baffle 10 are driven to move towards the left end of the sliding motion bin 13, when the tungsten steel sleeve lower baffle 10 completely covers the bottom of the tungsten steel sleeve 4, the touch screw 34 on the PC slider 11 just touches the backward stop light touch travel switch 24, the signal feedback device of the backward stop light touch travel switch 24 stops working, and all parts stop moving, wherein the touch screw 34 is located at the rear end of the PC slider 11 and at the rightmost end.
As shown in fig. 7, after the micro pinion 6 rotates reversely, because the micro pinion 6 and the micro sliding rack 20 are in a meshing relationship between gears, when the micro pinion 6 rotates reversely, the PC slider 11 and the tungsten steel sleeve lower baffle 10 are driven to move towards the right end of the sliding motion bin 13, after the tungsten steel sleeve lower baffle 10 completely shields the bottom of the tungsten steel sleeve 4, the PC slider 11 just touches the forward stop tact switch 25, the signal feedback device of the forward stop tact switch 25 stops working, and all parts stop.
An external equipment air socket-male head 28 is arranged on a shell 29 of the motor control cabin 27, a shielding signal line 31 is arranged on the power control box 32, and an external equipment air socket-female head 30 is arranged on the shielding signal line 31 and is matched with the external equipment air socket-male head 28 for use.
The backward stop tact travel switch 24 and the forward stop tact travel switch 25 are connected with an external equipment air socket-male head 28 through leads, so as to realize communication with a control system.
Control system of the shielding device: mainly there is opening and closing of baffle under the motor control, receives the instruction that the remote control end sent, and the mode of receiving the instruction includes modes such as WIFI and bluetooth
The main purpose of this practicality: in the state of non-operation of the equipment, the lower baffle 10 of the tungsten steel sleeve lower baffle 10 is closed, and in the state of operation, the lower baffle 10 is opened. Because the lower baffle is made of tungsten steel, the effect of shielding rays can be achieved when the lower baffle is closed.
The received instruction of the remote control end is an instruction of an upper computer position, and the upper computer position comprises a notebook computer or a tablet or a mobile phone. This instruction is the simplest instruction: opening and closing. The other end of the whole device of the linear tester is a linear control box which comprises a battery, a wireless receiving module and a circuit board, the circuit board is provided with a control circuit comprising a singlechip STM32F103C8T6,
as shown in fig. 9, the battery box lower shell 58 and the battery box upper shell 53 are fixed together through 4 battery box locking screws 59 to form a battery box, a power circuit board 55 is fixed on the battery box upper shell 53 through 4 power circuit board screws 56 inside the battery box, a rechargeable battery 57 is arranged between the power circuit board 55 and the battery box lower shell 58, a buckled voltmeter 50 is further arranged on the battery box upper shell 53, a self-locking switch 60 and a reset switch 61 are further fixed on the battery box upper shell 53 through an M12 thin nut 60-1, a charging power supply interface 66 is fixed on the side surface of the battery box upper shell 53 through a charging power supply screw 67, and an aviation plug 68 is fixed through an aviation plug screw 69
The working process is as follows:
when the self-locking switch 60 is pressed down, the voltmeter 50 with the buckle can display the electric quantity of the rechargeable battery 57, a closing instruction is manually sent to a control system through the reset switch 61 or the upper machine position in a wireless communication mode, the lower baffle plate 10 of the C tungsten steel sleeve moves leftwards, when the lower baffle plate 10 of the tungsten steel sleeve completely covers the bottom of the tungsten steel sleeve 4, the rack fixing screw 19 on the PC slider 11 just touches the backward stop tact travel switch 24, the backward stop tact travel switch 24 feeds back an in-place signal to the singlechip, the singlechip terminates the rotation of the micro motor 9-1, and all parts stop moving.
When the self-locking switch 60 is pressed down, the part 50 can display the electric quantity of the part 57, an opening instruction is manually sent to a control system through a reset switch 61 or an upper machine position in a wireless communication mode, the C tungsten steel sleeve lower baffle plate 10 moves rightwards, when the tungsten steel sleeve lower baffle plate 10 does not completely shield the bottom of the tungsten steel sleeve 4 to cover, the PC slider 11 just touches the forward stop light touch travel switch 25, the forward stop light touch travel switch 25 feeds back a position signal to the single chip microcomputer, the single chip microcomputer stops the rotation of the micro motor 9-1, and all parts stop moving.
The wireless receiving module is a WIFI or Bluetooth module and receives an instruction of the boarding position.
All the above trigger actions can be processed by the processor or realized by a logic circuit, for example, as shown in the circuit diagram of fig. 8, in the process of sliding left and right, the signal of the backward stop tact travel switch 24 is connected to the RELAY, when the backward stop tact travel switch 24 is not touched, the input end of the RELAY is at low level, S1 of the selector switch is turned on, the motor continuously operates, the device slides left, when the backward stop tact travel switch 24 is touched, the input end of the RELAY is at high level, S1 of the selector switch is turned off, the circuit where the motor connected with the lead screw is located is turned off, the operation is stopped, the corresponding actions of other parts are similar to the above actions, the RELAY and the selector switch are adopted, and through a proper logic circuit, the corresponding action response can be realized
The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A single photon emission computed tomography device linear and spatial resolution tester is characterized by comprising a bracket, a shielding device control system and a remote control system;
the support is used for supporting the shielding device and the shielding device control system which are connected through a wire, and the shielding device control system is connected with the remote control system through a wireless mode;
the shielding device at least comprises a PC base, and the PC base comprises a sliding motion cabin (13) and a motor control cabin (27) positioned in front of the sliding motion cabin (13);
a PC sliding block (11) is arranged on the left half part of the sliding motion bin (13), a tungsten steel sleeve lower baffle plate (10) is fixed on the left half part of the PC sliding block (11), and a micro-motion sliding rack (20) is fixed on the right half part of the PC sliding block (11) through a rack fixing screw (19);
a positioning block (23) is arranged in the middle of the sliding motion bin (13) and is fixed by a screw (21) through the positioning block;
a backward stop light-touch travel switch (24) and a forward stop light-touch travel switch (25) are arranged on the right half part of the sliding motion bin (13) and are fixed above the micro-motion sliding rack (20), wherein the backward stop light-touch travel switch (24) is fixed at the upper end of the side wall of the positioning block (23) and is tightly attached to the rear side wall of the sliding motion bin (13), and the forward stop light-touch travel switch (25) is positioned on the right side of the micro-motion sliding rack (20);
the motor control bin (27) is communicated with the right half part of the sliding motion bin (13), the micro motor (9-1) is fixed on a motor fixing frame (8), the motor fixing frame (8) is fixed on a partition plate between the motor control bin (27) and the sliding motion bin (13), the rear end of the micro motor (9-1) is connected with the micro pinion (6), and the micro pinion (6) is in gear linkage with the micro sliding rack (20).
2. The single photon emission computed tomography apparatus linear and spatial resolution tester as claimed in claim 1, wherein said shielding apparatus further comprises a tungsten steel top cap (2), an intermediate shield comprising a tungsten steel sleeve (4) and a custom measuring cup (3) disposed within the tungsten steel sleeve, and a tungsten steel sleeve lower baffle (10).
3. The single photon emission computed tomography apparatus linearity and spatial resolution tester as claimed in claim 1, wherein said PC base is further provided with an upper cover (5), the left side of the PC upper cover (5) is provided with a shield mounting port, the right side of the PC upper cover (5) is provided with an upwardly protruding fixing portion, the fixing portion is provided with a cross bar via hole (17) penetrating the left and right sides for passing through the cross bar of the support.
4. The single photon emission computed tomography apparatus linear and spatial resolution tester as claimed in claim 3, wherein said fixing portion is further provided with a cross bar screw hole (16), and a cross bar hand control screw (15) is screwed into the cross bar screw hole (16) for fixing the cross bar.
5. The single photon emission computed tomography apparatus linearity and spatial resolution tester as claimed in claim 1, wherein the motor control chamber (27) has an external equipment air socket-male (28) on the housing (29), a shielding signal line (31) on the power control box (32), and an external equipment air socket-female (30) on the shielding signal line (31) for matching with the external equipment air socket-male (28).
6. The single photon emission computed tomography apparatus linear and spatial resolution tester as claimed in claim 1 wherein said shield control system is electronically controlled to open and close the lower tungsten steel sleeve shutters in response to commands from a remote control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920439129.0U CN210095757U (en) | 2019-04-03 | 2019-04-03 | Linear and spatial resolution tester for single photon emission computed tomography device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920439129.0U CN210095757U (en) | 2019-04-03 | 2019-04-03 | Linear and spatial resolution tester for single photon emission computed tomography device |
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| CN210095757U true CN210095757U (en) | 2020-02-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109864755A (en) * | 2019-04-03 | 2019-06-11 | 刘汉臣 | A kind of single photon emission computed tomography device is linear and spatial discrimination force tester |
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- 2019-04-03 CN CN201920439129.0U patent/CN210095757U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109864755A (en) * | 2019-04-03 | 2019-06-11 | 刘汉臣 | A kind of single photon emission computed tomography device is linear and spatial discrimination force tester |
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| TR01 | Transfer of patent right |
Effective date of registration: 20210222 Address after: 102200 A504, building 8, No.97, Changping Road, Shahe Town, Changping District, Beijing (Changping Demonstration Park) Patentee after: Beijing prinkang Technology Co.,Ltd. Address before: 100034 No.5, Liutiao, xisibei, Xicheng District, Beijing Patentee before: Liu Hanchen |
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| TR01 | Transfer of patent right |