Radioactive drug activity measuring device

Abstract

The utility model relates to the technical field of radiopharmaceutical activity measurement, in particular to a radiopharmaceutical activity measuring device which comprises a measuring host and an ionization chamber, the measuring host and the ionization chamber are both installed on a base, and a taking and placing mechanism used for taking and placing a sample is arranged on the base on the left side of the ionization chamber. The picking and placing mechanism comprises a bottom plate, an electric push rod is fixedly arranged at the edge of the left side of the bottom plate, a lifting connecting plate is fixedly arranged at the upper end of the electric push rod, a second shaft seat is embedded in the bottom plate on the right side of the electric push rod, a shaft bush is assembled in the second shaft seat, and a supporting rod capable of sliding up and down is inserted in the shaft bush. The upper end of the supporting rod is rotatably connected with the lifting connecting plate through a first shaft seat, and a lifting supporting arm sleeves the annular surface of the supporting rod and is connected with the measuring frame through a plug-in connecting plate. According to the utility model, through the arranged pick-and-place mechanism, a sample automatic pick-and-place function is realized, a sample can be accurately and quickly put into or taken out of the measurement cavity of the ionization chamber, the operation is convenient, and the measurement efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to radioactive medicine activity measurement technical field, and specifically, relate to a radioactive medicine activity measurement device. BACKGROUND

[0002] Radioactive medicine activity measurement refers to the process of quantitatively determining the number of times of decay of radionuclides in radioactive medicine per unit time (i.e., radioactivity). Radioactivity is a key quality parameter of radioactive medicine, directly related to the effectiveness and safety of the medicine in clinical diagnosis or treatment. The activity of radioactive medicine must be accurately controlled to ensure that sufficient radiation dose reaches the target tissue (such as tumor), thereby achieving therapeutic effect. Too high activity may result in excessive radiation received by the patient, increasing the risk of side effects; too low activity may not achieve the desired therapeutic or diagnostic effect.

[0003] The current activity detection method is usually that medical staff manually places the syringe into the activity meter, or first places it on an intermediate rack and then manually places the intermediate rack into the activity meter. This operation has the following defects: because the measurement port is generally small, manual placement can easily hit the activity meter or cause the syringe to shake or tilt, resulting in leakage of the medicine in the syringe, inaccurate injection volume, and long-term operation in the isolation room, which is harmful to medical staff and not conducive to subsequent development of automated batch packaging operations.

[0004] Radioactive medicine activity measurement is a core link in nuclear medicine diagnosis and treatment. During activity detection, medical staff usually directly manually places the sample into the ionization chamber measurement cavity, or first places the sample on a measurement rack and then manually places the measurement rack into the ionization chamber measurement cavity. However, this measurement method mainly relies on manual operation. Because the opening of the ionization chamber measurement cavity is small, manual placement is not accurate enough, and the sample or measurement rack can easily hit the inner wall of the ionization chamber measurement cavity during manual placement, making it difficult to accurately and quickly place the sample into the ionization chamber measurement cavity. This method is not convenient to operate, affects measurement efficiency, and can easily cause sample position deviation, affecting ionization chamber detection efficiency.

[0005] Therefore, the utility model provides a radioactive medicine activity measurement device with precise sample taking and placing function to solve the above problems. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a radioactive medicine activity measurement device, which realizes accurate sample taking and placing through mechanical automation, reduces manual intervention, and improves operation convenience and detection efficiency.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme:

[0008] The application discloses a radioactive medicine activity measuring device which comprises a measuring host, an ionization chamber and a base, wherein the measuring host and the ionization chamber are both installed on the base, a taking and placing mechanism for sample taking and placing is arranged on the left side of the base of the ionization chamber, and a measuring frame is arranged in the ionization chamber.

[0009] The taking and placing mechanism comprises a lifting connecting plate, a shell cover, a lifting branch, a bottom plate, a fixed stand, an electric push rod and a supporting rod, the bottom plate is fixed on the base through four groups of fixed stands, the electric push rod is fixed on the left side edge of the bottom plate, the lifting connecting plate is fixed on the upper end of the electric push rod, a second shaft seat is embedded on the right side of the bottom plate of the electric push rod, a shaft bushing is arranged in the second shaft seat, the supporting rod which can slide up and down is arranged in the shaft bushing, the upper end of the supporting rod is rotatably connected with the lifting connecting plate through a first shaft seat, the driving synchronous belt pulley is arranged on the ring surface of the supporting rod, the lifting branch is sleeved on the ring surface of the supporting rod on the upper side of the driving synchronous belt pulley, the lifting branch is connected with the measuring frame through a plug-in connecting plate, the servo motor is installed on the back side of the bottom plate of the second shaft seat, the driving synchronous belt pulley is arranged on the upper side output end of the servo motor, and the driving synchronous belt pulley is in transmission connection with the driving synchronous belt pulley through a synchronous toothed belt.

[0010] Further, the plug-in connecting plate is fixedly connected with the measuring frame at the right end, the plug-in slot matched with the plug-in connecting plate is formed in the right end of the lifting branch, the plug-in connecting plate is inserted into the plug-in slot, and the plug-in connecting plate and the lifting branch are both provided with positioning holes in the interiors.

[0011] Further, the positioning stop plates for guiding and positioning are fixedly arranged on the front and back sides of the upper end of the measuring frame, and the vertical positioning stop plates are arranged on the upper ends of the positioning stop plates.

[0012] Further, the shell cover is arranged on the upper side of the bottom plate, the upper surface height of the shell cover is located on the lower side of the lifting branch, and the shell cover is provided with matched notches corresponding to the electric push rod and the supporting rod.

[0013] The limiting stop plate parallel to the lifting branch is fixedly arranged on the upper surface of the shell cover, and the limiting stop plate is located at the back side of the lifting branch.

[0014] Further, the key groove is formed in the ring surface of the supporting rod, the spline matched with the key groove is formed in the inner surface of the shaft bushing, and the key groove cooperates with the spline to drive the shaft bushing to horizontally rotate.

[0015] Further, the limiting plate is fixedly arranged on the bottom of the supporting rod, and the diameter of the limiting plate is larger than the inner diameter of the bottom of the shaft bushing.

[0016] Further, the base is provided with four groups of foot pads on the bottom.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1, the utility model discloses a taking and placing mechanism is set up, has sample automatic taking and placing function, solved the existing activity meter measurement when the problem of manual operation sample taking and placing, avoided manual and put in not enough precision, easy to impact ionization chamber measuring cavity inner wall and other defects, through taking and placing mechanism can accurately and quickly put sample into ionization chamber measuring cavity or take out from it, convenient operation has improved the measuring efficiency.

[0019] 2, the utility model discloses a plug-in slot cooperation plug-in connecting plate is convenient for realizing the quick assembly and disassembly of the measuring frame, and the measuring frame is convenient to install and replace, when installing, only need to align the plug-in connecting plate with the plug-in slot and insert and can complete the preliminary connection, when disassembling, only need to draw out the plug-in connecting plate from the plug-in slot, convenient and fast operation. The fastening bolt provides reliable connecting strength, guarantees that both do not separate in the device operation process.

[0020] 3, the utility model discloses a positioning baffle can guide the measuring frame along the ionization chamber measuring cavity inner wall accurate lifting movement, realized the positioning of the measuring frame, prevents the measuring frame from shaking and produces the deviation and cavity wall collision. Meanwhile through the positioning baffle that sets up can support the measuring frame from upside and limit, when the measuring frame reaches the measuring position, the positioning baffle and ionization chamber upper surface fit contact, plays the role of accurate positioning. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is the whole structure schematic diagram of the utility model.

[0022] Fig. 2 It is the structure schematic diagram of the taking and placing mechanism in the utility model.

[0023] Fig. 3 It is the disassembly structure schematic diagram of the measuring frame and the lifting support arm in the utility model.

[0024] Fig. 4 It is the local structure schematic diagram of the taking and placing mechanism in the utility model.

[0025] Fig. 5 It is the structure schematic diagram of the support rod and the shaft bushing in the utility model.

[0026] Fig. 6 It is the state schematic diagram of the taking and placing mechanism when using in the utility model.

[0027] In the diagram: 1. Measuring host; 2. Ionization chamber; 3. Base; 4. Foot pad; 5. Pick-up and drop mechanism; 51. Lifting connecting plate; 52. Housing; 521. Limiting baffle; 53. Lifting support arm; 531. Insertion slot; 532. Fastening bolt; 533. Positioning hole; 54. Base plate; 55. Fixed column; 56. Electric push rod; 57. First shaft seat; 58. Active synchronous pulley; 59. Synchronous toothed belt; 510. Servo motor; 511. Driven synchronous pulley; 512. Bushing; 513. Second shaft seat; 514. Support rod; 5141. Limiting piece; 515. Keyway; 516. Spline; 6. Measuring frame; 61. Positioning stop; 62. Positioning baffle; 7. Insertion connecting plate. Detailed Implementation

[0028] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0029] Example:

[0030] like Figs. 1 to 6 As shown, a radiopharmaceutical activity measuring device includes a measuring host 1, an ionization chamber 2 and a base 3. The measuring host 1 and the ionization chamber 2 are both mounted on the base 3. A sample handling mechanism 5 for handling samples is provided on the base 3 on the left side of the ionization chamber 2. A measuring frame 6 is placed inside the ionization chamber 2.

[0031] The loading and unloading mechanism 5 includes a lifting connecting plate 51, a housing 52, a lifting support arm 53, a base plate 54, fixed columns 55, an electric push rod 56, and a support rod 514. The base plate 54 is fixed to the base 3 by four sets of fixed columns 55. An electric push rod 56 is fixed at the left edge of the base plate 54, and the lifting connecting plate 51 is fixed at the upper end of the electric push rod 56. A second bearing seat 513 is embedded in the base plate 54 on the right side of the electric push rod 56. A bushing 512 is installed inside the second bearing seat 513, and a support rod 514 that can slide up and down is inserted inside the bushing 512. The upper end of the support rod 514 is rotatably connected to the lifting connecting plate 51 through a first bearing seat 57. A driven synchronous pulley 511 is mounted on the annular surface of the support rod 514. The support rod 514 has a support on the upper side of the driven synchronous pulley 511. A lifting arm 53 is fitted onto the ring surface of rod 514. The lifting arm 53 is connected to the measuring frame 6 via a connecting plate 7. A servo motor 510 is installed on the base plate 54 behind the second shaft seat 513. An active synchronous pulley 58 is mounted on the upper output end of the servo motor 510. The active synchronous pulley 58 is connected to the driven synchronous pulley 511 via a synchronous toothed belt 59. This design solves the problem that existing activity meters mainly rely on manual operation to pick up and put down samples. Due to the small opening of the ionization chamber 2 measuring cavity, manual placement is not accurate enough. During the manual placement process, the sample or measuring frame 6 is prone to hitting the inner wall of the ionization chamber 2 measuring cavity, making it difficult to accurately and quickly place the sample into the ionization chamber 2 measuring cavity. This makes the operation inconvenient and affects the measurement efficiency.

[0032] When the lifting arm 53 moves up and down, the measuring frame 6 moves synchronously, thereby achieving precise loading and unloading of samples from the outside into the measuring chamber 2 of the ionization chamber. This eliminates the traditional manual sample loading and unloading method and automates the sample loading and unloading process. The operator only needs to issue a command through the measuring host 1, and the device can automatically complete the loading and unloading actions, greatly shortening the operation time and improving the measurement efficiency.

[0033] In this embodiment, the right end of the connecting plate 7 is fixedly connected to the measuring frame 6. The right end of the lifting arm 53 has a connecting groove 531 that matches the connecting plate 7. The left end of the connecting plate 7 is inserted into the connecting groove 531. Positioning holes 533 are provided inside both the lifting arm 53 and the connecting plate 7 at the connecting groove 531. Fastening bolts 532 for locking are provided inside the positioning holes 533. The connecting groove 531, in conjunction with the connecting plate 7, facilitates the quick assembly and disassembly of the measuring frame 6, making it convenient to install and replace the measuring frame 6. During installation, simply align the connecting plate 7 with the connecting groove 531 and insert it to complete the initial connection; during disassembly, simply pull the connecting plate 7 out of the connecting groove 531, making the operation convenient and quick. The fastening bolts 532 provide reliable connection strength, ensuring that the two will not separate during device operation.

[0034] In this embodiment, positioning stops 61 for guiding and positioning are fixed on both the front and rear sides of the upper end of the measuring frame 6. A positioning baffle 62 perpendicular to the positioning stops 61 is fixed to the upper end of each positioning stop 61 for positioning. The positioning stops 61 guide the measuring frame 6 to move precisely up and down along the inner wall of the ionization chamber 2, achieving positioning and guidance of the measuring frame 6 and preventing it from shaking and colliding with the chamber wall. Simultaneously, the positioning baffle 62 supports and limits the measuring frame 6 from above. When the measuring frame 6 reaches the measurement position, the positioning baffle 62 contacts the upper surface of the ionization chamber 2, achieving precise positioning.

[0035] In this embodiment, a cover 52 is provided on the upper side of the base plate 54. The upper surface of the cover 52 is located below the lifting arm 53. The cover 52 has matching slots at the corresponding positions of the electric push rod 56 and the support rod 514. The cover 52 isolates the electric push rod 56, servo motor 510 and other components on the base plate 54 from the external environment, preventing damage or malfunction caused by accidental collisions with external objects, thus extending the service life of the device. At the same time, during the operation of the device, the cover 52 can prevent the operator from contacting the moving parts, avoiding pinching injuries and ensuring the operator's safety.

[0036] In this embodiment, a limiting baffle 521 parallel to the lifting arm 53 is fixed on the upper surface of the housing 52, and the limiting baffle 521 is located at the rear side of the lifting arm 53. The limiting baffle 521 limits the rotation of the lifting arm 53, preventing the lifting arm 53 from shifting due to inertia during rotation, thus ensuring the stability and positional accuracy of the lifting arm 53 and the measuring frame 6 during movement.

[0037] In this embodiment, the support rod 514 has a keyway 515 on its annular surface, and the inner surface of the bushing 512 has a spline 516 that matches the keyway 515. The keyway 515 and the spline 516 are used to drive the bushing 512 to rotate horizontally. When the support rod 514 is inserted into the bushing 512, the spline 516 can accurately fit into the keyway 515, achieving a tight fit between the two, thereby driving the bushing 512 to rotate, while not affecting the vertical movement of the support rod 514.

[0038] In this embodiment, a limiting piece 5141 is fixed at the bottom of the support rod 514. The diameter of the limiting piece 5141 is larger than the inner diameter of the bottom of the bushing 512. The limiting piece 5141 plays a limiting role in the movement of the support rod 514, which can prevent the support rod 514 from moving excessively and effectively limit the lifting and lowering position of the support rod 514.

[0039] In this embodiment, the bottom of the base 3 is provided with four sets of foot pads 4, which play a role in stabilizing support and preventing slippage.

[0040] It should be noted that the ionization chamber 2, the electric push rod 56, and the servo motor 510 are all electrically connected to the measuring host 1 via wires and are controlled by the measuring host 1.

[0041] The working principle of this radiopharmaceutical activity measuring device:

[0042] Initially, the measuring frame 6 is located inside the ionization chamber 2. When sample testing is required, the operator issues a sample pick-up / placement command through the measuring host 1. The measuring host 1 then activates the electric push rod 56, which extends upward. The electric push rod 56, via the lifting connecting plate 51, moves the lifting support arm 53 upward, thereby moving the measuring frame 6 upward and detaching it from the ionization chamber 2. After the measuring frame 6 is completely detached from the ionization chamber 2, the servo motor 510 starts, driving the active synchronous pulley 58 to rotate 90 degrees clockwise. The active synchronous pulley 58, via the synchronous toothed belt 59, drives the driven synchronous pulley 511 to rotate 90 degrees clockwise, thereby driving the support rod 514 to rotate 90 degrees clockwise. The support rod 514 then drives the measuring frame 6 to rotate 90 degrees clockwise, moving it from above the ionization chamber 2 to directly in front of the housing 52. The sample is then placed on the measuring frame 6. Next, the servo motor 510 is controlled to rotate 90 degrees in reverse, causing the support rod 514 to rotate in reverse, which in turn causes the measuring frame 6 to rotate 90 degrees in reverse, positioning it directly above the ionization chamber 2. Then, the electric push rod 56 is controlled to retract, causing the support rod 514 to move downwards, allowing the measuring frame 6 to descend into the ionization chamber 2. Finally, the sample in the ionization chamber 2 is tested using the measuring host 1.

[0043] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A device for measuring the activity of a radiopharmaceutical, characterized in that: The device includes a measuring host (1), an ionization chamber (2) and a base (3). The measuring host (1) and the ionization chamber (2) are both mounted on the base (3). The base (3) on the left side of the ionization chamber (2) is provided with a sample taking and placing mechanism (5). A measuring frame (6) is placed inside the ionization chamber (2). The picking and placing mechanism (5) includes a lifting connecting plate (51), a housing (52), a lifting support arm (53), a base plate (54), a fixed column (55), an electric push rod (56), and a support rod (514). The base plate (54) is fixed to the base (3) by four sets of fixed columns (55). An electric push rod (56) is fixed at the left edge of the base plate (54). The upper end of the electric push rod (56) is fixed with the lifting connecting plate (51). A second bearing seat (513) is embedded on the base plate (54) to the right of the electric push rod (56). A bushing (512) is assembled inside the second bearing seat (513). A support rod (514) that can slide up and down is inserted inside the bushing (512). The upper end of the support rod (514) is rotatably connected to the lifting connecting plate (51) via the first bearing seat (57). A driven synchronous pulley (511) is mounted on the ring surface of the support rod (514). A lifting arm (53) is sleeved on the ring surface of the support rod (514) above the driven synchronous pulley (511). The lifting arm (53) is connected to the measuring frame (6) via the plug-in connecting plate (7). A servo motor (510) is mounted on the base plate (54) behind the second bearing seat (513). An active synchronous pulley (58) is mounted on the upper output end of the servo motor (510). The active synchronous pulley (58) is connected to the driven synchronous pulley (511) via a synchronous toothed belt (59).

2. The radiopharmaceutical activity measuring device according to claim 1, characterized in that: The right end of the connecting plate (7) is fixedly connected to the measuring frame (6). The right end of the lifting arm (53) is provided with a connecting groove (531) that is compatible with the connecting plate (7). The left end of the connecting plate (7) is inserted into the connecting groove (531). The lifting arm (53) and the connecting plate (7) at the connecting groove (531) are both provided with positioning holes (533). The positioning holes (533) are provided with fastening bolts (532) for locking.

3. The radiopharmaceutical activity measuring device according to claim 2, characterized in that: The measuring frame (6) is fixed with positioning stops (61) for guiding and positioning on both the front and rear sides of the upper end. The upper end of the positioning stops (61) is fixed with a positioning baffle (62) for positioning perpendicular to it.

4. The radiopharmaceutical activity measuring device according to claim 1, characterized in that: The base plate (54) is covered with a shell (52) on the upper side. The upper surface of the shell (52) is located below the lifting arm (53). The shell (52) has a matching slot at the corresponding position to the electric push rod (56) and the support rod (514). A limiting baffle (521) parallel to the lifting arm (53) is fixed on the upper surface of the housing (52), and the limiting baffle (521) is located at the rear side of the lifting arm (53).

5. The radiopharmaceutical activity measuring device according to claim 1, characterized in that: The support rod (514) has a keyway (515) on its annular surface, and the inner surface of the bushing (512) has a spline (516) that matches the keyway (515). The keyway (515) and the spline (516) are used to drive the bushing (512) to rotate horizontally.

6. The radiopharmaceutical activity measuring device according to claim 5, characterized in that: The bottom of the support rod (514) is fixed with a limiting piece (5141), the diameter of which is larger than the inner diameter of the bottom of the bushing (512).

7. The radiopharmaceutical activity measuring device according to claim 1, characterized in that: The base (3) is equipped with four sets of foot pads (4) at the bottom.

Images