JPH0290091A - Apparatus for measuring radioactivity of solution in vial shield and vial shield used in such apparatus - Google Patents

Abstract

PURPOSE:To make it possible to perform measurement without taking out a vial bottle by providing an engaging pin which is engaged with a hole provided in a vial shield shutter, and providing radioactivity measuring device an the like at the rear side of a main body shutter that can be slidden in the up and down directions. CONSTITUTION:A vial shield 10 contains a vial bottle 13 wherein liquid incorporating radioactive material is inputted. The vial shield 10 is inserted in the direction of an arrow A on a mounting stage 2 of a radioactivity measuring apparatus. An engaging pin 3a which is provided on a main body shutter 3 is engaged with the through hole of a vial shield shutter 15. The tip of a lock pin 16 is pushed with the tip of the pin 3a. As a result, the pin 16 is retreated against the energizing force of a spring member, and locking is released. When the bottom surface of the vial shield which is set on the stage 2 pushes an actuator 5, a detector is operated. The signal is sent to a control means. The control means controls a driving means, and the shutter 3 and the vial shield shutter 15 are lowered together. Then, the part between the bottle 13 and a radioactivity measuring device 7 are opened and radioactivity is measured. When the measurement is finished, the shutter is lifted, and a part between the bottle 13 and the measuring device 7 are shielded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention utilizes a shutter provided in a vial shield to remove the radioactivity of a radioactive substance contained in a vial and housed in a vial shield without taking out the vial. The present invention relates to a radioactivity measuring device for a solution in a vial shield which is opened for measurement, and a vial shield used in the device.

(Prior Art) In recent years, radioisotopes have been frequently used in the medical field for testing medical conditions and the like. in this case.

A liquid containing a radioactive substance is placed in a vial and stored within a vial shield to prevent radioactivity from leaking outside. However, since the amount of radioactivity of radioactive substances constantly changes, it is necessary to measure the amount of radioactivity before using it. However, if the vial is taken out from the vial shield each time and measured, the radioactive amount will be This increases the chances of exposure to radiation, which is extremely dangerous. Therefore, without removing the vial from the vial shield,
It is necessary to be able to measure it.

Therefore, Genjin Motoyama previously proposed this type of device (see Japanese Patent Application No. 12819/1983).

When a vial shield with a vial shield shutter on the side is set on the mounting table of a radioactivity measuring device, a main body shutter that can be opened and closed is also provided on the measuring device side so as to face the vial shield shutter. The provided engagement pin engages with the hole provided in the vial shield shutter.

At the same time, the claw provided at the bottom of the main body shutter pushes the slide plate supporting the bottom of the vial shield shutter to release the lock, and the shutter becomes ready to be opened. Therefore, when the main body shutter is opened using the shutter opening/closing mechanism, the vial shield shutter is also opened, and there is no shield between the vial inside the vial shield and the radioactivity measuring instrument placed behind the main body shutter, and the inside of the vial is It is possible to measure the amount of radioactivity of radioactive substances.

(Problems to be Solved by the Invention) However, in the case of the conventional example, the shutter is opened and closed manually, resulting in poor operability.

Further, there were other problems such as a complicated lock release mechanism.

The present invention has been made in view of the above-mentioned problems, and has a simple lock release mechanism, and when a vial shield is set on the mounting table of a radiation measuring device, it is detected and the shutter is automatically activated. Open.

After the time required for measurement has elapsed, it closes automatically. It is an object of the present invention to provide a radioactivity measuring device for a solution in a vial shield that is extremely easy to operate, and a vial shield used in the device.

(Means for Solving the Problems) In order to achieve the above object, the radioactivity measurement device of the present invention includes a mounting table on which a vial shield having a vial shield shutter is placed, and a vial shield set on the mounting table. A main body shutter that has an engaging pin that engages with a hole provided in a vial shield shutter and can be opened and closed by sliding in the vertical direction, a radioactivity measuring instrument placed on the back of this main body shutter, and its measurement. a means for displaying the results, a means for opening and closing the shutter of the main body 5, a detecting means for detecting that the vial shield is set on the mounting table, and a detection signal from the detecting means causes the shutter of the main body 5 to be lowered together with the vial shield shutter. It is composed of a control means for sequentially controlling the driving means so as to open the gap between the solution in the vial shield and the radioactivity measuring device, and then raise and close the gap after a predetermined time required for measurement has elapsed.

In addition, the vial shield used in the radioactivity measuring device includes a vial shield body made of a radioactivity shielding material for storing a vial containing a radioactive substance, and a vial shield body made of a radioactivity shielding material as well, and on the side of the vial shield body. A vial shield shutter is provided that can be opened and closed by sliding in the vertical direction, and the vial shield shutter is provided in the vial shield main body, and the distal end is inserted into the hole provided in the vial shield shutter by the bias of a spring member. It consists of a lock pin that locks it in the closed state.

(Function) When the vial shield is set on the mounting table of the radioactivity measurement device, the engaging pin of the main body shutter engages with the hole provided in the vial shield shutter, and its tip pushes the tip of the lock pin, causing the lock pin to close. moves back and the lock is released.

On the other hand, when the vial shield is set on the tit table,
The detection means detects this, and the control means sequentially controls the drive means based on the detection signal. That is, the first main body shutter is lowered together with the vial shield shutter to open the gap between the solution in the vial shield and the radioactivity measuring device.

During this time, radioactivity measurements will be taken. After the time required for the measurement has elapsed, both shutters are raised and closed. The radioactivity sinus results are displayed on the display means.

(Example) An embodiment will be described in detail below with reference to one drawing.

FIG. 1 shows an embodiment of the present invention, in which 1 is a radioactivity measuring device, 2 is a mounting table on which a vial shield 10 is placed, as shown by the broken line, and 3 is a mounting table, as will be described later. The main body shutter has an engaging pin 3a that engages with a hole provided in the vial shield shutter of the vial shield set on the mounting table 2, and can be opened and closed by sliding in the vertical direction.
A radioactivity measuring device is arranged at the back of the main body shutter 3. 4 is a display for displaying the measurement results. The mounting table 2 has guides 2a on both sides thereof for inserting the vial shield 10, and a guide 2a in the center thereof.

Each of the protrusions 2b is provided with which a groove formed on the bottom surface of the vial shield IO engages and determines the setting direction. 5 slightly protruded from the surface of the mounting table 2. The actuator of the detector detects that the vial shield 10 is set at a predetermined position. There are other things that are not shown here.

It incorporates a drive mechanism for opening and closing the main body shutter 3 and a control means for sequentially controlling this drive mechanism.

FIGS. 2 and 3 show the vial shield 10 used in the radioactivity measuring device shown in FIG. 1. 11
and 12 are a vial shield main body and its lid made of a radioactive shielding material, for example a metal such as a button, and house a vial 13 containing a liquid containing a radioactive substance therein. Note that 14 is a viewing window, which is also made of transparent radiation shielding material.

Reference numeral 15 denotes a vial shield shutter made of a radioactivity shielding material that is provided on the side surface of the vial shield body so that it can be opened and closed by sliding in the vertical direction, and has a through hole 15a near its upper end. A lock pin 16 is disposed near the bottom of the vial shield main body 11, and its tip end is inserted into a through hole 15a provided in the vial shield shutter by the bias of a spring member 17 to lock the vial shield shutter 15 in a closed state. , 11a are grooves formed on the bottom surface of the vial shield main body 11, and are engaged with the protrusions 2b of the mounting table 2 of the radioactivity measuring device. Note that 18 is a cushion placed on the inner bottom surface of the vial shield, and 19 is a spacer, which is selected to match vials of different heights.

Next, the operation of this embodiment will be explained using FIG. 4. A vial shield IO containing a vial 13 containing a liquid containing a radioactive substance is inserted in the direction of arrow A onto the mounting table 2 of the radioactivity measuring device. At this time, the vial shield IO is guided by the guides 2a on both sides of the mounting table, and the groove 11a formed on the bottom surface engages with the protrusion 2b to position it. Then, the engagement pin 3a provided on the main body shutter 3 engages with the through hole 15a of the vial shield shutter 15, and pushes the tip of the lock pin 16 with its tip.

As a result, the lock pin 16 retreats against the biasing force of the spring member 17, and the lock is released.

On the other hand, when the bottom of the vial shield set on the mounting table presses the cutter 5, a detector such as a microswitch 6 is activated, and the signal is sent to a control means (not shown). The control means controls a drive means (not shown) to lower the main body shutter 3 together with the vial shield shutter 15. Then, the space between the vial 13 and the radioactivity measuring device 7 is opened, so that radioactivity measurement is performed.

After the time required for the measurement, for example 2 to 3 seconds, has elapsed, the drive means is operated again, and both shutters are raised to shield the vial 13 and the radioactivity measuring device 7.

At the same time, the radioactivity measurement results are displayed on the display 4.

If the vial shield 10 is pulled out from the mounting table 2.

The lock pin 16 is located in the through hole 1 of the vial shield shutter.
5a and is automatically inserted and locked.

Note that the main body shutter 3 is also made of a radioactivity shielding material, and the radiation measuring device 7 is entirely covered with a cover 8 made of a radioactivity shielding material.
When closed, no external radioactivity is detected.

(Effects of the Invention) As explained above, according to the present invention, radioactivity can be measured without removing the vial from the vial shield, so there is little chance of exposure to radiation. Just by setting it on the mounting table, the opening/closing of the shutter, measurement, and display of results are automatically controlled in sequence, greatly improving operability. Further, the locking mechanism of the vial shield shutter is simple and reliable, as is the releasing mechanism thereof, and therefore, the effects of cost reduction and reliability improvement are achieved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a radioactivity measuring device according to an embodiment of the present invention, Fig. 2 is a perspective view of a vial shield used in the radioactivity measuring device, and Fig. 3 is a sectional view of the vial shield. , FIG. 4 is an explanatory diagram of the operation. 1... Radioactivity measuring device, 2... Mounting table, 3 ・
...Body shutter, 3a...Engagement pin, 4...
・Display device, 6...Detector, 7...Radioactivity measuring device, 10...Vial shield, 13...Vial bottle, 15...Vial shield shutter, 15a
...Through hole. 16... Lock pin, 17... Spring member.

Claims (2)

[Claims] (1) A mounting table on which a vial shield having a vial shield shutter is placed, and an engagement pin that engages with a hole provided in the vial shield shutter of the vial shield set on the mounting table,
a main body shutter that can be opened and closed by sliding in the vertical direction; a radiation measuring device disposed on the back of the main body shutter; a means for displaying the measurement results; a driving means for opening and closing the main body shutter; and the vial. a detection means for detecting that the shield is set on the mounting table; and a detection signal from the detection means causes the main body shutter to be lowered together with the vial shield shutter to separate the solution in the vial shield from the radioactivity measuring device. 1. A radioactivity measuring device for a solution in a vial shield, comprising: a control means for controlling the driving means to open the gap, and after a predetermined time necessary for measurement has passed, to rise and close the drive means. (2) A vial shield for use in the radioactivity measuring device according to claim (1), comprising: a vial shield body made of a radioactivity shielding material for housing a vial containing a liquid containing a radioactive substance; and the vial shield. A vial shield shutter made of a radiation shielding material is provided on the side surface of the main body so that it can be opened and closed by sliding in the vertical direction; and a vial shield shutter is provided on the vial shield main body, and the tip part is attached to the vial shield by the biasing force of a spring member. a lock pin that is inserted into a hole provided in the shutter and locks the vial shield shutter in a closed state, when set on a mounting table of a radioactivity measuring device;
An engagement pin of the main body shutter engages with a hole provided in the vial shield shutter, and its tip pushes the tip of the lock pin, and the lock pin retreats to release the lock, and the vial shield shutter is closed together with the main body shutter. A vial shield that opens.