CN209460240U - Medical activity meter and activity measurement system - Google Patents

Abstract

A medical activity meter and an activity measurement system belong to the technical field of medical equipment. The medical activity meter includes: a casing, a semiconductor detector arranged in the casing, and a medicine holding part arranged on the casing. The medicine holding part has a holding chamber, and the distance between the holding chamber and the semiconductor detector is The height ratio of the holding cavity is greater than or equal to 10. Activity measurement systems include the medical activity meters described above. The medical activity meter can make the measurement accuracy of the medical activity meter less affected by the height of the sodium chloride rinsing solution.

Description

Medical activity meter and activity measurement system

technical field

The utility model relates to the technical field of medical instruments, in particular to a medical activity meter and an activity measurement system.

Background technique

Nuclear medicine, developed with the development of radioisotopes and the application of nuclear technology in the biological field, has become an important part of modern medicine. Among them, the medical activity meter is an indispensable and important instrument for the nuclear medicine department of the hospital to measure the activity of the radiopharmaceuticals used by the subjects or patients.

In the prior art, the medical activity meter usually places the drug to be tested in the sodium chloride rinse solution, and then uses a detector to detect the type and activity of the nuclide contained in the drug to be tested. Since semiconductors have atomic numbers and The higher density enables a smaller volume to achieve high detection efficiency, high energy linearity, and high energy resolution. Therefore, medical activity meters are the first choice for the detection of the type and activity of nuclides in drugs to be detected. Semiconductor detectors.

However, due to the limitations of the processing technology and production conditions of semiconductor materials, it is difficult to make a well-shaped structure around the drug to be detected, so the output signal of the semiconductor detector is easily affected by the height of the sodium chloride eluting solution, making it difficult for the drug to be tested. The measurement accuracy of radioactivity is poor.

Utility model content

The purpose of this utility model is to provide a medical activity meter and an activity measurement system, which can make the measurement accuracy of the medical activity meter less affected by the height of the sodium chloride rinsing solution.

Embodiments of the utility model are achieved in that:

In one aspect of the embodiment of the present utility model, a medical activity meter is provided, including: a housing, a semiconductor detector arranged in the housing, and a medicine containing part arranged on the housing, the medicine containing The storage part has a storage cavity, and the ratio of the distance between the storage cavity and the semiconductor detector to the height of the storage cavity is greater than or equal to 10.

Optionally, the distance between the holding chamber and the semiconductor detector is greater than or equal to 420mm.

Optionally, the housing includes a support part connected to the medicine holding part and a housing part for housing the semiconductor detector, the support part and the housing part are connected to each other.

Optionally, a cross-sectional area of the support portion cut along a plane perpendicular to the length direction of the housing is smaller than a projected area of the receiving portion on the plane.

Optionally, the end surface of the support part is provided with an opening matching the medicine holding part, and the medicine holding part is inserted into the support part through the opening.

Optionally, the volume of the medicine containing part protruding into the housing accounts for half of the volume of the medicine containing part.

Optionally, the detection area of the semiconductor detector is greater than or equal to 100mm ² .

Optionally, the semiconductor detector has a thickness ranging from 0.5 mm to 10 mm.

Optionally, the material of the medicine holding part includes organic polymer material or aluminum alloy.

Another aspect of the embodiments of the present utility model provides an activity measurement system, including: the medical activity meter described in any one of the above.

The beneficial effects of the utility model embodiment include:

In the medical activity meter provided by the embodiment of the present invention, the medicine holding part is arranged on the housing, so that when the medical activity meter is used, the sodium chloride rinse solution can be placed in the medicine holding part, and the waiting The detection drug is fully dissolved in the sodium chloride rinse solution; the radiation signal emitted by the drug to be detected can be detected and output by arranging a semiconductor detector in the housing; The ratio of the height of the cavity is set to be greater than or equal to 10, so that the detection accuracy of the medical activity meter in this embodiment is less affected by the height of the sodium chloride rinse solution, thereby making the detection accuracy of the medical activity meter higher.

The activity measurement system provided by the embodiment of the utility model adopts the above-mentioned medical activity meter, so that the measurement accuracy of the medical activity meter is less affected by the height of the sodium chloride rinsing solution.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly introduced in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work.

Fig. 1 is the structural representation of the medical activity meter that the utility model embodiment provides;

FIG. 2 is a top view of FIG. 1 .

Icons: 100-medical activity meter; 110-housing; 111-supporting part; 112-accommodating part; 113-opening; 114-end face; 120-semiconductor detector; Cavity; L-first distance; x-second distance; d-full height.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the utility model is used. It is only for the convenience of describing the utility model and simplifying the description, rather than Any indication or implication that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that a component is absolutely level or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present utility model, it should also be noted that, unless otherwise specified and limited, the terms "setting", "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection , can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediary, and can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Please refer to FIG. 1 , in one aspect of the embodiment of the present invention, a medical activity meter 100 is provided, including: a housing 110 , a semiconductor detector 120 disposed in the housing 110 , and a drug container disposed on the housing 110 . The holding part 130 , the medicine holding part 130 has a holding cavity 131 , and the ratio of the distance between the holding cavity 131 and the semiconductor detector 120 to the height of the holding cavity 131 is greater than or equal to 10.

It should be noted that the medical activity meter 100 of this embodiment also includes a charge-sensitive preamplifier circuit, an SK shaping circuit, and a back-end digital processing circuit (not shown in FIG. 1 ).

When using the medical activity meter 100 according to the embodiment of the present invention, first add sodium chloride rinsing solution into the holding chamber 131 of the drug holding part 130, and then put the drug to be detected in the sodium chloride rinsing solution , after the radiation emitted by the drug to be detected enters the semiconductor detector 120, it will excite electron-hole pairs, and the electron-hole pairs are collected into electrical signals by the charge-sensitive pre-discharge circuit under the action of an external electric field, and the electrical signals pass through the SK shaping circuit Entering the back-end digital processing circuit, through the processing and analysis of the digital circuit, the energy of the incident ray will be identified, and then the type of nuclide in the drug to be detected that emits the ray will be identified; in addition, by analyzing the intensity information corresponding to different energy rays, and then The activity of the radiopharmaceutical is analyzed.

It should also be noted that, under normal circumstances, the drug holding part 130 will be filled with a sodium chloride rinse solution, since the drug to be detected is evenly dispersed in the entire sodium chloride rinse solution after being dissolved in the sodium chloride rinse solution. Therefore, due to the different positions of the drug to be detected with the same activity in the drug holding part 130, the number of rays entering the detector is different, and the number of rays emitted by it is related to its height in the sodium chloride rinse solution. The relationship is as follows:

D＝A/(4×π×(L+x) ² )×S (1)

In the formula (1), D is the number of rays, A is the activity of the drug to be detected, the first distance L is the distance between the holding chamber 131 and the semiconductor detector 120, and the second distance x is the distance between the drug to be detected The distance between the bottoms of the cavities 131 , S is the detection area of the semiconductor detector 120 .

The error of the number of rays emitted by the drug to be detected located at the top of the holding chamber 131 compared to the number of rays emitted by the drug to be detected located at the bottom of the holding chamber 131 is:

D ₁ /D ₂ ＝(L+d) ² /L ² (2)

In _formula ( ₂ ), D1 is the number of rays emitted by the drug to be detected located at the top of the holding chamber 131, D2 is the number of rays emitted by the drug to be detected located at the bottom of the holding chamber 131, and the holding height d is the number of rays emitted by the drug to be detected located at the bottom of the holding chamber 131 The height of the chamber 131.

When the ratio of the distance between the storage cavity 131 and the semiconductor detector 120 to the height of the storage cavity 131 is greater than or equal to 10, that is, L/d≥10, then D ₁ /D ₂ ≤1.21.

In the medical activity meter 100 provided by the embodiment of the present invention, the medicine holding part 130 is arranged on the housing 110, so that when the medical activity meter 100 is used, the sodium chloride rinsing solution can be placed in the medicine holding part 130, and the drug to be detected is placed in the sodium chloride rinse solution to fully dissolve; by setting the semiconductor detector 120 in the housing 110, the radiation signal emitted by the drug to be detected can be detected and output; by placing the holding chamber 131 The ratio of the distance between the semiconductor detector 120 and the height of the medicine holding part 130 is set to be greater than or equal to 10, so that the detection accuracy of the medical activity meter 100 of the present embodiment is less affected by the height of the sodium chloride rinse solution. Small, which in turn makes the detection accuracy of the medical activity meter 100 higher.

Optionally, the distance between the storage cavity 131 and the semiconductor detector 120 is greater than or equal to 420 mm.

It should be noted that the medicine holding part 130 can generally be selected from a medicine bottle commonly used in the market, and its size can also be selected from existing sizes. For example, the size of the medicine holding part 130 along the height direction of the holding chamber 131 can be set Correspondingly, the distance between the holding chamber 131 and the semiconductor detector 120 is greater than or equal to 420 mm.

Optionally, please refer to FIG. 1 , the housing 110 includes a support portion 111 connected to the drug storage portion 130 and a housing portion 112 for housing the semiconductor detector 120 , and the support portion 111 and the housing portion 112 are connected to each other.

It should be noted that the supporting part 111 and the receiving part 112 can be made of the same material, such as organic polymer material, aluminum alloy or stainless steel; the material of the supporting part 111 can also be set to lightweight materials such as engineering plastics, as long as it can It only needs to play a supporting role for the medicine containing part 130 and the contents contained therein.

Optionally, please refer to FIG. 1 and FIG. 2 , the cross-sectional area of the support portion 111 cut along a plane perpendicular to the length direction of the housing 110 is smaller than the projected area of the accommodating portion 112 on the above-mentioned plane.

Since the medical activity meter 100 of this embodiment is usually placed on a placement plane with the accommodating portion 112 in use, and the medicine containing portion 130 is placed upwards, the cross-sectional area of the supporting portion 111 is set to be smaller than that of the accommodating portion 112 described above. The projected area on the plane makes the medical activity meter 100 of this embodiment more stable in use. In addition, since the supporting part 111 only serves to support the medicine containing part 130 , providing the supporting part 111 with a smaller cross-sectional area can make the weight of the whole medical activity meter 100 lighter.

Optionally, referring to FIG. 1 , the end surface 114 of the supporting part 111 is provided with an opening 113 matching with the medicine holding part 130 , and the medicine holding part 130 is inserted into the supporting part 111 through the opening 113 .

Specifically, the medicine holding part 130 can be set in a trumpet shape, and the end of the medicine holding part 130 with a smaller cross-sectional area faces the support part 111 and extends into the support part 111 until the cross-sectional area of the medicine holding part 130 When the cross-sectional area of the opening 113 is the same, it can be fixed on the supporting part 111 . With the above-mentioned structure, the medical activity meter 100 of this embodiment has a relatively simple structure and is easy to assemble and disassemble.

Optionally, please refer to FIG. 1 , the volume of the medicine containing part 130 protruding into the casing 110 accounts for half of the volume of the medicine containing part 130 .

In this way, the medicine holding part 130 is fixed more stably on the housing 110. If the volume of the medicine holding part 130 protruding into the inside of the housing 110 is too large, it will be inconvenient to disassemble the medicine holding part 130; The volume of the part 130 protruding into the housing 110 is too small, so that the medicine containing part 130 is not fixed on the housing 110 stably enough, and it is easy to fall from the housing 110 .

Optionally, the detection area of the semiconductor detector 120 is greater than or equal to 100mm ² .

It should be noted that, the present embodiment does not specifically limit the shape of the semiconductor detector 120 , for example, a cylinder may be used, and a shape such as a square may also be used. With the above-mentioned structure, the semiconductor detector 120 can receive more rays emitted by the drug to be detected, thus making the calculated activity more accurate, and thus making the measurement accuracy of the medical activity meter 100 in this embodiment higher. high.

Optionally, the semiconductor detector 120 has a thickness ranging from 0.5 mm to 10 mm.

Specifically, the thickness of the semiconductor detector 120 may be set to 0.5 mm, 2 mm, 4 mm, 6 mm, 8 mm, or 10 mm.

Since the voltage of the external electric field of the medical activity meter 100 in this embodiment is proportional to the thickness of the semiconductor detector 120 , that is, the larger the thickness, the larger the required voltage. Therefore, the thickness of the semiconductor detector 120 is selected from the above numerical range, so that the medical activity meter 100 of this embodiment does not need to be provided with an external electric field with an excessive voltage.

Optionally, the material of the drug holding part 130 includes organic polymer material or aluminum alloy.

Both organic polymer materials and aluminum alloys have the advantages of light weight and high strength. Therefore, the above-mentioned materials are used for the drug holding part 130, which makes the medical activity meter 100 of this embodiment lighter in weight.

Another aspect of the embodiment of the present utility model provides an activity measurement system, including: any one of the above medical activity meters 100 . The activity measurement system has the same structure and beneficial effects as the medical activity meter 100 in the foregoing embodiments. Since the structure and beneficial effects of the medical activity meter 100 have been described in detail in the foregoing embodiments, details are not repeated here.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. a kind of Medical activity meter characterized by comprising shell, setting in the intracorporal semiconductor detector of the shell and Drug containing part on the housing is set, and the drug containing part, which has, holds chamber, described to hold chamber and the semiconductor The distance between detector and the ratio of the height for holding chamber are greater than or equal to 10.

2. Medical activity meter as described in claim 1, which is characterized in that described to hold between chamber and the semiconductor detector Distance be greater than or equal to 420mm.

3. Medical activity meter as described in claim 1, which is characterized in that the shell includes connecting the drug containing part Support portion and the receiving portion for accommodating the semiconductor detector, the support portion and described accommodation section are connected with each other.

4. Medical activity meter as claimed in claim 3, which is characterized in that the support portion edge and shell length direction phase The area of section of vertical plane cutting is less than the projected area of described accommodation section on the plane.

5. Medical activity meter as described in claim 3 or 4, which is characterized in that the end face of the support portion be provided with it is described The aperture that drug containing part matches, the drug containing part are embedded in the support portion by the aperture.

6. such as the described in any item Medical activity meters of Claims 1 to 4, which is characterized in that the drug containing part protrudes into described The intracorporal volume of shell accounts for the half of the volume of the drug containing part.

7. such as the described in any item Medical activity meters of Claims 1 to 4, which is characterized in that the detection of the semiconductor detector Area is greater than or equal to 100mm²。

8. such as the described in any item Medical activity meters of Claims 1 to 4, which is characterized in that the thickness of the semiconductor detector Range is between 0.5mm~10mm.

9. Medical activity meter as described in claim 1, which is characterized in that the material of the drug containing part includes organic high score Sub- material or aluminium alloy.

10. a kind of Activity measuring system, which is characterized in that including medical activity as claimed in any one of claims 1 to 9 wherein Meter.