CN215424701U - Adjustable point source moving rack - Google Patents
Adjustable point source moving rack Download PDFInfo
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- CN215424701U CN215424701U CN202020945892.3U CN202020945892U CN215424701U CN 215424701 U CN215424701 U CN 215424701U CN 202020945892 U CN202020945892 U CN 202020945892U CN 215424701 U CN215424701 U CN 215424701U
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Abstract
The utility model relates to a medical auxiliary instrument, in particular to an adjustable point source moving frame, which is used for the quality control of a lead grid model of SPECT (single photon emission computed tomography). the adjustable point source moving frame comprises a support, wherein the support consists of telescopic rods, the telescopic rods are vertical to the ground, the bottom of the telescopic rods is fixed on a wheel disc consisting of three or more universal wheels, and the universal wheels are uniformly distributed along the circumferential direction of the outer edge of the bottom of the wheel disc; the top of the telescopic rod is connected with an upward inclined oblique rod, the length of the oblique rod is not more than 1 meter, the included angle between the oblique rod and the telescopic rod is more than 90 degrees, and the other end of the oblique rod is provided with a source placing cylinder for placing a point source. The distance between the point source and the center of the lead grid is realized by adjusting the telescopic rod, the point source is convenient and safe to place, the height of the support is easy and quick to adjust, and equipment guarantee is provided for standardized operation.
Description
Technical Field
The utility model relates to a medical auxiliary instrument, in particular to an adjustable point source moving frame which is used for the quality control of a lead grid model of SPECT.
Background
Single Photon Emission Computed Tomography (SPECT) is a device and imaging method that combines electron Computed Tomography (CT) with nuclear medicine tracing principles. Radioactive substances are marked on the radioactive drugs, the marking drugs can be selectively absorbed by different parts of a human body generally, and SPECT reconstructs images under the assistance of a computer by utilizing gamma rays emitted by single photon radioactive nuclides (such as 99mTc, 123I and the like) injected into the human body along with the drugs to form tomograms of corresponding parts. For example, drugs that can accumulate in the myocardium are used for SPECT imaging of the heart. The organs capable of absorbing the drugs labeled with a certain amount of radioactive substances can present bright blocks in the images, and if abnormal absorption conditions of the organs exist, the abnormal bright or dark conditions of the organs can be caused.
SPECT mainly comprises a probe, a frame, a fault bed, a computer and an optical photographic system. The probe system is a rotary gamma camera, the probe rotates 360 degrees or 180 degrees around the axis to collect a series of plane projection images, and transverse tomography images can be reconstructed from the series of projection images by using a Filtering Back Projection (FBP) method. The three-dimensional information of the transverse tomograph is recombined by the image to obtain the tomograph in the sagittal, coronal and any oblique directions.
In order to standardize SPECT performance detection, the state publishes a (SPECT) quality control detection regulation WS523-2019, and both a lead grid model and a detection method have corresponding regulations: the lead grid model is placed on the surface of the detector, and is irradiated by a gamma point source which is arranged right above the detector and is 5 times of the maximum linear degree of an effective radiation field for detection.
According to the quality control requirement, a lead grid model needs to be manufactured once every month, when the lead grid model is manufactured by the conventional instrument, the lead grid and the probe cannot be fixed, so that the lead grid with the same size as the probe can only be flatly placed on the surface of the probe in a horizontal position, and the configured point source needs to be placed at the center of the lead grid for a distance of more than 1 m. Without a corresponding point source fixing device, some operation methods of using units are to fix the point source on a moving arm of the instrument by using adhesive plaster, and the following defects exist: firstly, the moving arm is high, and can be bound up only by means of tools such as a square stool, and certain danger exists in operation; secondly, in order to firmly fix the point source and the moving arm and prevent the point source and the moving arm from falling to pollute the lead grid, a plurality of layers of adhesive tapes need to be wound, and the operation is complicated; thirdly, the point source is hung on the moving arm, and the moving arm does not accord with the operation specification.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: the adjustable point source moving frame is convenient for point source fixing and operation.
The technical problem of the utility model is solved by the following scheme: an adjustable point source moving frame is used for quality control of a lead grid model of SPECT and comprises a support, wherein the support consists of telescopic rods, the telescopic rods are vertical to the ground, the bottom of the support is fixed on a wheel disc formed by three or more universal wheels, and the universal wheels are uniformly distributed along the circumferential direction of the outer edge of the bottom of the wheel disc; the top of the telescopic rod is connected with an upward inclined oblique rod, the length of the oblique rod is not more than 1 meter, the included angle between the oblique rod and the telescopic rod is more than 90 degrees, and the other end of the oblique rod is provided with a source placing cylinder for placing a point source. The height of the source placing cylinder is adjustable through the telescopic rod, the point source is placed in the source placing cylinder, the distance between the point source and the center of the lead grid model is guaranteed to be more than 1m, and the operation is convenient, safe and standard.
On the basis of the scheme, the source placing cylinder is a plastic cylinder and is fixed below the end part of the oblique rod. The manufacture is convenient, and the shape is easy to control.
Preferably, the length of the source placing cylinder 4 is 12 cm, the inner diameter is 3 cm, the source placing cylinder is arranged below the top end of the diagonal rod and is parallel to the diagonal rod.
On the basis of the scheme, the telescopic rod is sleeved by two rods with the length of 1m, the upper rod is an inner sleeve, the lower rod is an outer sleeve, the upper rod is pulled out to the required height from the lower rod, and the top end of the upper rod is connected with the inclined rod.
Preferably, the telescopic rod is provided with scales.
Preferably, the length of the oblique rod is 60cm, and the included angle between the oblique rod and the telescopic rod is 135 degrees.
On the basis of the scheme, at least one universal wheel belt brake mechanism is arranged in the wheel disc. The utility model is convenient to fix.
The utility model has the advantages that: the point source is placed in putting a source section of thick bamboo, and point source and plumbous bars center distance realize through adjusting the telescopic link, and convenient, safety are placed to the point source, and support height adjustment is light, swift, provides equipment guarantee for standardized operation.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
1-a telescopic rod;
11-upper rod; 12-lower beam; 13-a fixed sleeve;
2-wheel disk; 21-with brake wheel;
3-diagonal bar;
4-source placing cylinder.
Detailed Description
An adjustable point source moving frame, as shown in fig. 1, comprises a support, wherein,
the support is composed of two telescopic rods 1 with the length of 1m, the telescopic rods 1 are vertical to the ground, an upper rod 11 is an inner sleeve with size scales, a lower rod 12 is an outer sleeve, the bottom of the lower rod 12 is fixed on a wheel disc 2, and the upper rod 11 is pulled out from the lower rod 12 to a required height and is fixed by a fixing sleeve 13;
the inclined rod 3 is sleeved at the top end of the upper rod 11, the length of the inclined rod 3 is 60cm, the included angle between the inclined rod 3 and the telescopic rod is 135 degrees, the other end of the inclined rod 3 is fixedly provided with a cylindrical source placing cylinder 4 for placing a point source, the source placing cylinder 4 is arranged below the top end of the inclined rod and is parallel to the inclined rod 3, and the length of the source placing cylinder 4 is 12 cm, and the inner diameter of the source placing cylinder is 3 cm;
five universal wheels which are uniformly distributed in the circumferential direction are arranged at the bottom of the wheel disc 2 and fixed at the bottom of the lower rod 12, wherein one universal wheel is provided with a brake wheel 21.
The upper rod of the embodiment is provided with scales, so that the height of the point source from the lead grid is randomly selected from 1 meter to 1 meter and 5 meters.
The source placing cylinder 4 of the embodiment is a plastic cylinder, a point source is directly placed in the source placing cylinder 4, and the distance between the point source and the center of the lead grid model is ensured to be more than 1m by adjusting the telescopic rod, so that the operation is convenient, safe and standard.
The adjustable point source moving rack has the advantages that: firstly, a circular source placing cylinder is specially designed below the head part of the moving frame so as to be convenient for storing point sources; secondly, the rack can be lifted to conveniently place the point source; thirdly, the pole extending above and the height-adjustable pole just can place the point source at the center of the lead grid and with the height of more than 1 m.
Claims (4)
1. An adjustable point source moving frame is used for the quality control of a lead grid model of SPECT and comprises a support and is characterized in that the support consists of telescopic rods, the telescopic rods are vertical to the ground, the bottom of the telescopic rods is fixed on a wheel disc formed by three or more universal wheels, and the universal wheels are uniformly distributed along the circumferential direction of the outer edge of the bottom of the wheel disc; the top of the telescopic rod is connected with an upward inclined rod, the length of the inclined rod is not more than 1 meter, the included angle between the inclined rod and the telescopic rod is 135 degrees, and the other end of the inclined rod is provided with a source placing cylinder for placing a point source; wherein the content of the first and second substances,
the source placing cylinder is a plastic cylinder and is fixed below the end part of the oblique rod;
the source placing cylinder 4 is 12 cm in length and 3 cm in inner diameter, is arranged below the top end of the oblique rod and is parallel to the oblique rod;
at least one universal wheel is provided with a brake mechanism.
2. The adjustable point source moving rack according to claim 1, wherein said telescopic rod is sleeved by two rods with a length of 1m, the upper rod is an inner sleeve, the lower rod is an outer sleeve, the upper rod is pulled out from the lower rod to a required height, and the top end of the upper rod is connected with the diagonal rod.
3. The adjustable point source moving stand according to claim 1 or 2, wherein said telescopic rod is provided with a scale.
4. The adjustable frame for moving a point source as claimed in claim 3, wherein said diagonal rod has a length of 60 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020945892.3U CN215424701U (en) | 2020-05-29 | 2020-05-29 | Adjustable point source moving rack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020945892.3U CN215424701U (en) | 2020-05-29 | 2020-05-29 | Adjustable point source moving rack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215424701U true CN215424701U (en) | 2022-01-07 |
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ID=79680119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020945892.3U Active CN215424701U (en) | 2020-05-29 | 2020-05-29 | Adjustable point source moving rack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215424701U (en) |
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2020
- 2020-05-29 CN CN202020945892.3U patent/CN215424701U/en active Active
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