CN214434256U

CN214434256U - Novel CT dose die body

Info

Publication number: CN214434256U
Application number: CN202022972879.XU
Authority: CN
Inventors: 卢燕超; 张健; 李孟飞; 郭彬; 李兴东; 李德红; 孙朝阳
Original assignee: National Institute of Metrology
Current assignee: National Institute of Metrology
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-10-22
Anticipated expiration: 2030-12-11

Abstract

The utility model discloses a novel CT dose die body, including box and upper cover plate, its characterized in that, be provided with on the box the upper cover plate, be provided with simulation solution in the box, be provided with on the upper cover plate and hold cavity sheathed tube through-hole, the cavity sleeve pipe is a plurality of, cavity sleeve pipe evenly distributed in the box, the cavity is intraductal to be provided with the detection sensor and is used for detecting the CT ray, the detection sensor is connected with outside check out test set. The utility model discloses an utilize the inside cavity of head mould, add the water of certain proportion and the sodium chloride of different concentrations, scan the dose detection phantom with CT, CT ray detects after passing through the sodium chloride solution decay and obtains the CT dose value, provides research and experimental foundation for radiation physical therapy.

Description

Novel CT dose die body

Technical Field

The utility model belongs to the technical field of CT measuring device, especially, relate to novel CT dose die body.

Background

Ct (computed tomography), that is, electronic computed tomography, which uses precisely collimated X-ray beams, etc. to scan sections of a human body one after another together with a detector with extremely high sensitivity, has the characteristics of fast scanning time, clear images, etc., and can be used for the examination of various diseases; in CT, a certain thickness of the layer of the human body is scanned by X-ray beams, the X-rays transmitted through the layer are received by a detector, converted into visible light, converted into electrical signals by photoelectric conversion, converted into digital signals by an analog/digital converter (analog/digital converter), and input into a computer for processing. The image formation process takes the form of voxels (voxels) that are cuboids of the same volume as the selected slice.

The information obtained from the scanning is calculated to obtain the X-ray attenuation coefficient or absorption coefficient of each voxel, and then arranged into a matrix, i.e. a digital matrix (digital matrix), which can be stored in a magnetic or optical disk. Each digit in the digital matrix is converted into small blocks with unequal gray scale from black to white, i.e. pixels (pixels), by a digital/analog converter (digital/analog converter), and the small blocks are arranged in a matrix, i.e. a CT image is formed. Therefore, the CT image is a reconstructed image. The X-ray absorption coefficient of each voxel can be calculated by different mathematical methods. The working procedure of CT is as follows: according to the different absorption and transmittance of different tissues of human body to X-ray, it uses the instrument with very high sensitivity to measure human body, then inputs the data obtained by measurement into the electronic computer, after the data is processed by the electronic computer, the cross-section or three-dimensional image of the examined position of human body can be taken, and the small pathological changes of any position in human body can be found. An important index for evaluating the safety quality of a CT device in operation is the ray dose, and the CT dose die body is mainly used for measuring and detecting, but because of the difference of the absorption and the transmittance of different tissues of a human body to X rays of different ages and different physiques of the human body, the CT scanning result is easily interfered, and therefore a novel CT dose die body is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems existing in the prior art and providing a novel CT dose mold body.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a box and upper cover plate be provided with on the box the upper cover plate, be provided with simulation solution in the box, be provided with on the upper cover plate and hold cavity sheathed tube through-hole, the cavity sleeve pipe is a plurality of, cavity sleeve pipe evenly distributed in the box, be provided with in the cavity sleeve pipe and detect the sensor and be used for detecting the CT ray, it is connected with outside check out test set to detect the sensor.

Further, the simulated solution is a sodium chloride solution, and the absorption value of the human body signs corresponding to the age and the physique to the rays under the X-ray is simulated.

Further, a hanging fixing hook is arranged on the upper cover plate and connected with the scanning frame through a bolt.

Further, the bottom of the box body is provided with a mounting groove for accommodating the hollow sleeve.

Further, a sealing ring is arranged between the box body and the upper cover plate.

Further, a solution injection cover is arranged on the upper cover plate.

Furthermore, a partially-wrapped circular ring is arranged on the outer side of the box body and used for detecting the body part.

Further, the box body is made of a light-transmitting material, and the light-transmitting material is PMMA, HDPE or PTFE material.

A novel CT dose die body detection method comprises the following steps:

a, adopting simulated solutions with different concentrations, namely 0%, 0.030%, 0.050%, 0.1%, 0.5%, 0.8% and 1% to simulate the absorption values of human heads with different ages and different physiques to rays under X-rays, wherein the simulated solution is a sodium chloride solution;

b, pouring a simulated solution into the box body, and inserting a detection sensor into the hollow sleeve through the hollow sleeve to detect the CT scanning ray attenuated by the simulated solution;

c, the detection sensor transmits ionization current signals formed by the collected electrons and positive ions to a measuring unit to obtain a CT dose value,

compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses an utilize the inside cavity of head mould, add the water of certain proportion and the sodium chloride of different concentrations, scan the dose detection phantom with CT, CT ray detects after passing through the sodium chloride solution decay and obtains the CT dose value, for radiation physical therapy, provides research and experimental foundation.

Drawings

FIG. 1 is a schematic structural diagram of a novel CT dose phantom;

FIG. 2 is a perspective view of a novel CT dose phantom;

FIG. 3 is a schematic cross-sectional view of a novel CT dose phantom;

fig. 4 is a structural bottom view of a novel CT dosage phantom.

In the figure: 1-injection solution cover, 2-adjusting screw, 3-upper cover plate, 4-box, 5-simulation solution, 6-hanging fixed hook, 7-bolt, 8-hollow sleeve, 9-CT dosage die body 10-ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1, the utility model discloses a case, 4 and upper cover plate 3, be provided with on the box 4 upper cover plate 3, be provided with simulation solution 5 in the box 4, be provided with on the upper cover plate 3 and hold the through-hole of cavity sleeve pipe 8, cavity sleeve pipe 8 is a plurality of, 8 evenly distributed of cavity sleeve pipe in the box 4, be provided with detection sensor in the cavity sleeve pipe 8 and be used for detecting the CT ray, detection sensor is connected with outside check out test set.

In another embodiment, the simulated solution 5 is a sodium chloride solution, and the absorption value of the X-ray radiation of the human body signs corresponding to the age and the physique is simulated.

In another embodiment, a hanging fixing hook 6 is arranged on the upper cover plate 3, the hanging fixing hook 6 is connected with the scanning frame through a bolt 7, the hanging fixing hook 6 can be hung on the scanning frame for CT scanning rotation in the detection process, and the bolt 7 can play a role in fixing and clamping.

In another embodiment, the bottom of the box body is provided with a mounting groove for accommodating the hollow sleeve.

In another embodiment, a sealing ring is arranged between the box body and the upper cover plate, and the box body 4 is connected with the upper cover plate 3 through an adjusting screw 2.

In another embodiment, the upper cover plate is provided with a solution injection cover 1.

In another embodiment, a partially covered ring is disposed outside the case for detecting the body.

In another embodiment, the box body is made of a light-transmitting material, and the light-transmitting material is PMMA, HDPE or PTFE, and can be used for CT simulation detection of the head.

A novel CT dose die body detection method comprises the following steps:

and C, the detection sensor transmits ionization current signals formed by the collected electrons and positive ions to the measuring unit to obtain a CT dose value.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a novel CT dose die body, includes box and upper cover plate, its characterized in that, be provided with on the box the upper cover plate, be provided with simulation solution in the box, be provided with on the upper cover plate and hold the sheathed tube through-hole of cavity, the cavity sleeve pipe is a plurality of, cavity sleeve pipe evenly distributed in the box, the intraductal detection sensor that is provided with of cavity sleeve is used for detecting the CT ray, detection sensor is connected with outside check out test set.

2. The novel CT dose phantom according to claim 1, wherein said simulated solution is a sodium chloride solution, which simulates the absorption of radiation by X-rays of human body signs corresponding to age and physical constitution.

3. The novel CT dose phantom according to claim 1, wherein a hanging fixing hook is provided on said upper cover plate, said hanging fixing hook being connected to the gantry by a bolt.

4. The novel CT dose phantom according to claim 1, wherein the bottom of said housing is provided with a mounting groove for receiving said hollow cannula.

5. The novel CT dose phantom according to claim 1, wherein a sealing ring is provided between said housing and said upper cover plate.

6. The novel CT dosage phantom of claim 1, wherein said upper cover plate is provided with a cap for infusion solution.

7. The novel CT dose phantom according to claim 1, wherein the outside of said housing is provided with a partially wrapped ring for inspection of the body.

8. The novel CT dose phantom according to claim 1, wherein said housing is a light transparent housing, said light transparent housing being a PMMA, HDPE or PTFE material.