CN212848302U

CN212848302U - Gaseous ionization chamber and X-ray diagnostic equipment

Info

Publication number: CN212848302U
Application number: CN202022013618.5U
Authority: CN
Inventors: 念凌宇
Original assignee: Feirui Medical Instrument Jiaxing Co ltd
Current assignee: Feirui Medical Instrument Jiaxing Co ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-03-30
Anticipated expiration: 2030-09-15

Abstract

The utility model provides a gaseous state ionization chamber and X ray diagnostic equipment. The gaseous ionization chamber comprises a shell, a foam interlayer, a carbon film, a silver film and a signal transmission cable; the carbon film, the silver film and the foam interlayer are all positioned in the shell; the carbon film is positioned between the two foam interlayers, and the silver film is positioned between the shell and the foam interlayers; an induction area is arranged in the foam interlayer, a conductive material layer is coated in the induction area, a buffer area is arranged at the edge of the foam interlayer adjacent to the induction area, and the thickness of the buffer area is gradually increased along the direction far away from the induction area; the signal transmission cable is electrically connected with the carbon film. The utility model discloses a structural design who improves sets up the conducting material layer at the response region to make the response region rather than have the luminousness to X ray the same substantially around, form the buffer zone at the cotton interbedded edge of bubble simultaneously, can effectively avoid the response region to form the ghost on the exposure image from this, help improving exposure image quality, improve medical diagnosis's accuracy.

Description

Gaseous ionization chamber and X-ray diagnostic equipment

Technical Field

The utility model relates to a medical diagnosis treatment facility technical field especially relates to a gaseous state ionization chamber and X ray diagnostic equipment.

Background

X-ray diagnostic techniques are the earliest non-invasive visceral examination techniques used in the world. Since the X-ray passes through the human body, the different parts absorb different degrees of X-ray, for example, the skeleton absorbs more X-ray than the muscle, so that the X-ray passing through the human body is different in the different parts, the different X-ray quantities carry the density distribution information of each part of the human body, the intensity of the fluorescence or sensitization caused on the fluorescent screen or photographic film is greatly different, and therefore, shadows with different densities are displayed on the fluorescent screen or photographic film (after development and fixation). According to the contrast of shade, and the clinical manifestation, the test result and the pathological diagnosis, whether a certain part of the human body is normal can be judged. With the continuous improvement of medical diagnosis level and the higher attention of people to health, the application of X-ray diagnosis technology is more and more extensive.

Ionization chambers are a common component in X-ray medical devices. In use, it is placed between the patient and the imaging assembly and automatic exposure control is achieved by measuring the X-ray dose incident therein. The ionization chamber accumulates the dose of the incident X-rays and converts the accumulated dose into an electric signal to be output, the X-ray digital photography system obtains the electric signal representing the accumulated dose and turns off the X-ray emitting equipment to stop the emission of the X-rays when the electric signal is consistent with a preset value, so that automatic exposure control is realized, the X-ray image has the best quality and the radiation quantity received by a patient is the minimum, and the ionization chamber is an indispensable important component in the field of X-ray diagnosis and treatment equipment.

The induction area of the existing gaseous ionization chamber is air, and the residual image of the ionization air chamber exists on an exposure image, so that the quality of the exposure image is reduced, the error of a diagnosis result is easily caused, and even a serious medical accident is caused.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a gaseous ionization chamber and an X-ray diagnostic apparatus, which are used to solve the problems of the existing gaseous ionization chamber that the air exists in the sensing area, the afterimage of the air chamber is ionized on the exposure image, the quality of the exposure image is reduced, the diagnostic result is easy to make mistakes, and even serious medical accidents are caused.

To achieve the above and other related objects, the present invention provides a gaseous ionization chamber, comprising a housing, a foam interlayer, a carbon film, a silver film, and a signal transmission cable; the carbon film, the silver film and the foam interlayer are all positioned in the shell; the carbon film is positioned between the two foam interlayers, and the silver film is positioned between the shell and the foam interlayers; an induction area is arranged in the foam interlayer, a conductive material layer is coated in the induction area, a buffer area is arranged at the edge of the foam interlayer adjacent to the induction area, and the thickness of the buffer area is gradually increased along the direction far away from the induction area; the signal transmission cable is electrically connected with the carbon film.

Optionally, the conductive material layer comprises one of a conductive silver paste layer and a conductive carbon paste layer.

More optionally, the thickness of the conductive silver paste layer is 2 ± 0.5 μm, and the thickness of the conductive carbon paste layer is 10 ± 1 μm.

Optionally, the number of the sensing regions is 3, one of the sensing regions is located in the center of the gaseous ionization chamber, and the central points of the 3 sensing regions form an isosceles triangle.

In an alternative, the sensing region is a rectangular region.

Optionally, the gaseous ionization chamber further comprises a signal amplifier, the signal amplifier being connected to both the carbon membrane and the signal transmission cable.

Optionally, the gaseous ionization chamber further comprises an electromagnetic shielding layer located on the outer surface of the housing.

Optionally, the shell comprises a carbon fiber plate and a carbon fiber edge strip located in the circumferential direction of the carbon fiber plate.

The utility model also provides an X ray diagnostic equipment, X ray diagnostic equipment includes as in above-mentioned arbitrary scheme gaseous state ionization chamber.

As described above, the utility model discloses a gaseous state ionization chamber and X ray diagnostic equipment sets up the conducting material layer through the structural design who improves in the response region, so that the response region has the luminousness to X ray about rather than the roughly the same, form the buffer at the cotton intermediate layer of bubble and the adjacent edge of response region simultaneously, this buffer and the contact of response region edge, in order to avoid the regional edge of response to form the sudden change, can effectively avoid the response region to form the ghost on the exposure image from this, help improving exposure image quality, improve medical diagnosis's accuracy.

Drawings

Fig. 1 is a schematic structural diagram of the gas ionization chamber of the present invention.

FIG. 2 is a schematic cross-sectional view taken along line AA' of FIG. 1.

Fig. 3 is a schematic cross-sectional view along line BB' of fig. 1.

Fig. 4 is a schematic diagram showing the position relationship between the foam interlayer and the sensing region of the gaseous ionization chamber of the present invention.

Description of the element reference numerals

11 casing

12-foam interlayer

121 buffer area

13 carbon film

131 sensing area

132 ground region

14 signal transmission cable

16 signal amplifier

17 silver film

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Please refer to fig. 1 to 4. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Existing gaseous ionization chambers are prone to afterimages of the ionized air chamber on the exposed image. The inventor has found that, through long-term research, the sensing region of the gaseous ionization chamber is air, the sensing region is not filled with solid materials (so the sensing region is also commonly referred to as a sensing air cavity), the periphery is filled with foam, and the absorption of X-rays by the sensing region is reduced, so that afterimages appear. The afterimage can cause the quality of the exposure image to be reduced, easily causes the error of the diagnosis result and even causes serious medical accidents. The present application therefore proposes a solution to this.

Specifically, as shown in fig. 1 to 4, the present invention provides a gaseous ionization chamber, which comprises a housing 11, a foam interlayer 12, a carbon film 13, a silver film 17 and a signal transmission cable 14; the carbon film 13, the silver film 17 and the foam interlayer 12 are all positioned in the shell 11, and the silver film 17, the carbon film 13 and the foam interlayer 12 form the basic structure of the equipment; the carbon film 13 is positioned between the two foam interlayers 12, and the silver film 17 is positioned between the shell 11 and the foam interlayers 12; a sensing area 131, namely a sensing air cavity, is arranged in the foam interlayer 12, namely the foam interlayer is not filled in the sensing area, a conductive material layer (not shown) is coated/printed in the sensing area 131, and the edge of the foam interlayer 12 adjacent to the sensing area 131 is provided with a buffer area, the thickness of the buffer area is gradually increased along the direction far away from the sensing area (from zero to the maximum thickness of the foam interlayer); the signal transmission cable 14 is electrically connected to the carbon film 13.

Specifically, the silver film 17 may be attached to the inner surface of the housing 11 by double-sided adhesive, the foam interlayer 12 may be attached to the surface of the silver film 17 by double-sided adhesive, the carbon film 13 is located between two foam interlayers 12, the carbon film 13 surrounds a plurality of sensing regions 131 and a grounding region 132, and the surfaces of the sensing regions 131 and the grounding region 132 are printed with the conductive material layer, including but not limited to one of a conductive silver paste layer and a conductive carbon paste layer, the sensing regions 131 may extend to the silver film 17, that is, the sensing regions 131 are not filled with the foam interlayer 12 and are filled with gas, such as air, argon, etc., or the foam interlayer 12 is located at the periphery of the sensing regions 131, and the edges of the foam interlayer 12 adjacent to the sensing regions 131 have buffer regions 121 (i.e., the buffer regions 121 are part of the foam interlayer 12), the thickness of the buffer region 121 gradually increases in a direction away from the carbon film 13 to form an inclined slope in a direction contacting the carbon film 13 (or the foam interlayer 12 is cut in an inclined manner); the signal transmission cable 14 is electrically connected to the carbon film 13.

The utility model discloses a structural design who improves, coating/printing conducting material layer in the induction zone, so that induction zone has the luminousness to X ray the same on an average rather than around, form the buffer at the cotton interbedded edge of bubble simultaneously, this buffer and induction zone edge contact, in order to avoid induction zone edge to form and show the sudden change (do the fuzzification to induction zone's edge promptly), can effectively avoid induction zone to form the ghost on the exposure image from this, help improving exposure image quality, improve medical diagnosis's accuracy.

The thickness of the conductive material layer needs to be matched with the thickness of the foam interlayer 12, so that the light transmittance of different materials to X-rays is basically the same. The inventor finds out through multiple experiments that if the conductive material layer is a conductive silver paste layer, the thickness is preferably 2 +/-0.5 μm; if the conductive material layer is a conductive carbon paste layer, the thickness is preferably 10 ± 1 μm.

The number of the sensing regions 131 may be set as desired. In one example, the number of the sensing regions 131 is 3, one of the sensing regions 131 is located in the center of the gaseous ionization chamber, or in the center of the foam interlayer, and the center points of the 3 sensing regions 131 are located on an isosceles triangle. The size of the 3 sensing regions 131 may be the same or different.

In one example, the sensing region 131 is a rectangular region.

Of course, in other examples, the sensing region 131 may also be a concentric annular region, which is not strictly limited in this embodiment.

As an example, the gaseous ionization chamber further comprises a signal amplifier 16, the signal amplifier 16 being connected to both the carbon membrane 13 and the signal transmission cable 14 for amplifying the signal.

As an example, the gaseous ionization chamber further comprises an electromagnetic shielding layer (not shown) located on the outer surface of the housing.

As an example, the housing comprises a carbon fiber plate and carbon fiber strakes located circumferentially to the carbon fiber plate, thereby ensuring that the housing has a good stiffness to support the entire gaseous ionization chamber.

The edge of the foam sandwich 12 may be as shown in fig. 4, that is, the foam sandwich 12 is chamfered outward (i.e., chamfered in a direction away from the center of the foam sandwich 12), but in other examples, the foam sandwich 12 may also be chamfered inward (i.e., chamfered in a direction close to the center of the foam sandwich 12), which is not limited in this embodiment.

The utility model also provides an X ray diagnostic equipment, X ray diagnostic equipment includes as in above-mentioned arbitrary scheme gaseous state ionization chamber. The X-ray diagnostic apparatus of the present invention is basically the same as the prior art except that the gaseous ionization chamber with the above structure is adopted, and for example, the X-ray diagnostic apparatus also includes an imaging component, an X-ray generating device, etc. electrically connected to the gaseous ionization chamber.

To sum up, the utility model discloses a gaseous state ionization chamber and X ray diagnostic equipment sets up the conducting material layer through the structural design who improves in the induction zone to make induction zone and its have the luminousness to X ray the same on every side, form the buffer at the cotton interbedded edge of bubble simultaneously, this buffer and induction zone edge contact, in order to avoid induction zone edge to form the sudden change, can effectively avoid induction zone to form the ghost on the exposure image from this, help improving exposure image quality, improve medical diagnosis's accuracy. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A gaseous ionization chamber is characterized by comprising a shell, a foam interlayer, a carbon film, a silver film and a signal transmission cable; the carbon film, the silver film and the foam interlayer are all positioned in the shell; the carbon film is positioned between the two foam interlayers, and the silver film is positioned between the shell and the foam interlayers; an induction area is arranged in the foam interlayer, a conductive material layer is coated in the induction area, a buffer area is arranged at the edge of the foam interlayer adjacent to the induction area, and the thickness of the buffer area is gradually increased along the direction far away from the induction area; the signal transmission cable is electrically connected with the carbon film.

2. The gaseous ionization chamber of claim 1, wherein: the conductive material layer includes one of a conductive silver paste layer and a conductive carbon paste layer.

3. The gaseous ionization chamber of claim 2, wherein: the thickness of the conductive silver paste layer is 2 +/-0.5 mu m, and the thickness of the conductive carbon paste layer is 10 +/-1 mu m.

4. The gaseous ionization chamber of claim 1, wherein: the number of the induction areas is 3, one induction area is located in the center of the gaseous ionization chamber, and the central points of the 3 induction areas form an isosceles triangle.

5. The gaseous ionization chamber of claim 1, wherein: the sensing area is a rectangular area.

6. The gaseous ionization chamber of claim 1, wherein: the gaseous ionization chamber also comprises a signal amplifier which is connected with the carbon film and the signal transmission cable.

7. The gaseous ionization chamber of claim 1, wherein: the gaseous ionization chamber further comprises an electromagnetic shielding layer located on the outer surface of the housing.

8. The gaseous ionization chamber of any one of claims 1-7, wherein: the shell comprises a carbon fiber plate and a carbon fiber edge strip located on the circumferential direction of the carbon fiber plate.

9. An X-ray diagnostic apparatus characterized by: the X-ray diagnostic apparatus comprising a gaseous ionization chamber as claimed in any one of claims 1 to 8.