CN111803116A - Method for reducing radiation of X-ray detection environment - Google Patents

Abstract

The invention discloses a method for reducing radiation in an X-ray detection environment, including: S1, an X-ray shielding structure is arranged at an X-ray generating device, the X-ray shielding structure shields an X-ray tube, and the X-ray tube emitted by the X-ray tube The rays are emitted from the emission port of the X-ray generating device; S2, the receiving end: a protective medium and a first shielding plate are set on the detected person, and the detected person is located between the protective medium and the first shielding plate, the The protective medium covers the detected part of the detected person, an X-ray digital detector for imaging is arranged between the detected person and the first shielding plate, and the protective medium is arranged between the X-ray generating device and the detected object. Between the detection parts; S3, the operation end: a second shielding plate is arranged between the operator and the X-ray generating device. The present invention greatly reduces the X-ray radiation in the environment, thereby solving the problem of X-ray radiation in special scenarios such as non-protective rooms.

Description

Method for reducing radiation of X-ray detection environment

technical field

The present invention relates to the related technical field of reducing X-ray radiation, in particular to a method for reducing radiation of an X-ray detection environment.

Background technique

Portable X-ray inspection equipment is widely used in disasters, accidents and other special scenarios that require emergency diagnosis. These special scenarios are different from traditional protective room environments. Portable X-ray detection equipment is prone to leak a large amount of X-rays during work, which in turn affects the health of surrounding people. In the national standard "GB18871-2002 Basic Standard for Ionizing Radiation Protection and Radiation Source Safety" and "GBZ 117-2015 Radiation Protection Requirements for Industrial X-ray Flaw Detection", the radiation dose to the public in the environment is required to be no more than 1mSv/year. In addition, in the national standard "GBZ130-2013 Medical X-ray Diagnostic Radiation Protection Requirements", there is a requirement that the radiation of equipment to the human body should be controlled below 2.5μGy/h. How to overcome the X-ray radiation problem of the existing portable X-ray detection equipment in special scenarios such as non-protective rooms has become a technical problem that needs to be solved.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for reducing the radiation of the X-ray detection environment.

In order to achieve the above object, the present invention adopts the following technical scheme: a method for reducing the radiation of the X-ray detection environment, including:

S1. X-ray emitting end: an X-ray shielding structure is provided at the X-ray generating device, the X-ray shielding structure shields the X-ray tube, and the X-rays emitted by the X-ray tube are transmitted from the X-ray generating device. of the launch port;

S2. Receiving end: a protective medium and a first shielding plate are set on the detected person, the detected person is located between the protective medium and the first shielding plate, and the protective medium covers the detected part of the detected person , an X-ray digital detector for imaging is arranged between the detected person and the first shielding plate, the protective medium is arranged between the X-ray generating device and the detected part, and the X-ray of the X-ray generating device The X-ray emitted by the bulb is directed to the protective medium through the X-ray exit port of the shielding shell of the X-ray shielding structure;

S3. Operation end: a second shielding plate is arranged between the operator and the X-ray generating device.

Further elaboration, the X-ray shielding structure includes an insulated lead frame fixedly installed in the inner cavity of the shielding shell, the X-ray tube is arranged in the inner cavity of the shielding shell, and the shielding shell is opened with X-rays The exit port, the X-rays generated by the X-ray tube are emitted through the X-ray exit port, the cables connected at the X-ray tube are guided out of the shielding shell through the insulating lead frame, and the shielding shell is open. There is a wiring channel, the wiring channel is provided with a corner, and the cable connected at the X-ray tube passes through the entrance, the corner, and the outlet of the wiring channel in sequence, and then is led out from the X-ray shielding structure; The insulated lead frame is provided with a cable insulation channel along the cable channel, the cable insulation channel is provided between the cable and the cable channel, and the cable insulation channel separates the cable from the cable channel. The lines are separated.

To further elaborate, the width of the second shielding plate is at least 60 cm, and the height is at least 160 cm.

The beneficial effects of the present invention are as follows: the present invention is provided with an X-ray shielding structure at the X-ray generating device to reduce the X-ray leakage at the X-ray transmitting end; a protective medium and a first shielding plate are provided at the receiving end, and the protective medium reduces the reflection of X-rays and filtering out low-energy X-rays, the first shielding plate shields and absorbs the remaining X-rays; the second shielding plate is arranged at the operation end to further reduce the radiation risk of the operator. Under the mutual cooperation of the shielding protection measures in the above three positions, the X-ray radiation in the environment is greatly reduced, thus solving the problem of X-ray radiation in special scenarios such as non-protective rooms, and reaching the national standard "GB18871-2002 ionizing radiation" The radiation dose to the public in the environment required by the “Basic Standard for Protection and Radiation Source Safety” and “GBZ 117-2015 Radiation Protection Requirements for Industrial X-ray Flaw Detection” shall not exceed 1mSv/year, and the national standard “GBZ130-2013 Medical X-ray Diagnostic Radiation In "Protection Requirements", there is a requirement that the radiation of equipment to the human body should be controlled below 2.5μGy/h.

Description of drawings

Figure 1 is a schematic diagram of the present invention.

FIG. 2 is a schematic structural diagram of the X-ray shielding structure in the fuel tank of the X-ray generating device.

3 is a cross-sectional view of an X-ray shielding structure.

FIG. 4 is a cross-sectional view of the shielding case.

FIG. 5 is a cloud diagram of the X-ray radiation intensity distribution after using the present invention.

Reference numerals: 10, X-ray shielding structure; 11, shielding shell; 111, X-ray exit port; 112, wiring channel; 12, insulated lead frame; 121, cable insulation channel; 20, X-ray tube; 30 , fuel tank; 40, AC-DC converter; 50, filament transformer; 60, high voltage transformer.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, the method for reducing the radiation of the X-ray detection environment includes:

S1. X-ray emitting end: an X-ray shielding structure 10 is provided at the X-ray generating device, the X-ray shielding structure 10 shields the X-ray tube 20, and the X-rays emitted by the X-ray tube 20 can only be transmitted from the X-ray generating device The X-ray is emitted at the emission port of the X-ray generator to prevent the leakage of X-rays at the X-ray emission end;

S2. Receiving end: a protective medium and a first shielding plate are set on the detected person, the detected person is located between the protective medium and the first shielding plate, the protective medium covers the detected part of the detected person, and the detected person is connected with the first shielding plate. An X-ray digital detector for imaging is arranged between a shielding plate, a protective medium is arranged between the X-ray generating device and the detected part, and the X-ray emitted by the X-ray tube 20 of the X-ray generating device is shielded by the X-ray The X-ray exit port 111 of the shielding shell 11 of the structure 10 is directed to the protective medium;

The shape of the protective medium selects a plane or a curved shape to cover the detected person. It is preferable to use a protective medium in the shape of a curved surface to cover the subject, and the protective medium in the shape of a curved surface can better cover the subject, and more comprehensively shield and absorb the X-ray reflected on the subject, and further The X-ray radiation generated to the surrounding environment during the X-ray detection process is greatly reduced, and the safety performance is improved.

Specifically, the protective medium is made of materials such as copper, lead, etc., which have low X-ray reflection properties, low shielding properties, and uniform materials. The protective medium can reduce the reflectivity of X-rays, reduce the amount of X-ray reflection by more than 80%, and reduce the X-ray radiation caused by reflection in the environment. In order to reduce the reflection of X-rays and ensure the quality of X-ray images, the shielding performance of the protective medium to X-rays is less than 0.1mm lead equivalent. After the X-ray beam passes through the X-ray digital detector for imaging, the first shielding plate shields and absorbs the remaining X-rays, so as to prevent the X-rays from being radiated into the environment again. The first shielding plate is made of X-ray shielding materials such as lead, and the lead equivalent is greater than 1 mm to ensure sufficient shielding. The protective medium is made of material with uniform material, which can further ensure the uniformity of intensity after the X-rays pass through the protective medium, thereby ensuring the imaging quality after the X-rays pass through the protective medium.

S3. Operation end: a second shielding plate is arranged between the operator and the X-ray generating device. Since the shielding medium can only reduce the amount of X-ray reflection, there is still some X-ray reflection in the surrounding environment. In order to prevent the operator from being injured by radiation, a second shielding plate is arranged between the operator and the X-ray generating device, and the shielding performance of the second shielding plate is at least 0.35mm lead equivalent. The width of the second shielding plate is at least 60 cm and the height is at least 160 cm.

As shown in FIG. 2 to FIG. 4 , the X-ray shielding structure 10 includes an insulated lead frame 12 fixedly installed in the inner cavity of the shielding shell 11 , and the X-ray tube 20 is arranged in the inner cavity of the shielding shell 11 . The shell 11 is provided with an X-ray exit port 111, the X-rays generated by the X-ray tube 20 are emitted through the X-ray exit port 111, and the cable connected at the X-ray tube 20 is guided out of the shielding shell 11 through the insulated lead frame 12, and the shielding shell 11 There is a wiring channel 112, the wiring channel 112 is provided with a corner, and the cables connected at the X-ray tube 20 pass through the entrance, the corner, and the outlet of the wiring channel 112 in turn, and then lead out from the X-ray shielding structure 10, as shown in FIG. 3 As shown in FIG. 4 , the setting of the corners makes it impossible for the X-rays emitted by the X-ray tube 20 to directly shoot from the entrance of the wiring track 112 to the outlet of the wiring track 112 , and the X-rays emitted by the X-ray tube 20 cannot Leakage to the outside through the cable channel 112, so as to effectively avoid the leakage of X-rays; the insulated lead frame 12 is provided with a cable insulation channel 121 along the cable channel 112, and the cable insulation channel 121 is arranged between the cable and the cable channel 112. , the cable insulation channel 121 separates the cable from the cable track 112 . As shown in FIG. 2 , the X-ray shielding structure 10 is specifically arranged in the fuel tank 30 of the X-ray generating device, and the fuel tank 30 is also provided with AC-DC converter 40 , filament transformer 50 , high-voltage transformer 60 and other devices.

In the method of reducing X-ray radiation in the detection environment, the function of S1 is to make X-rays can only be emitted from the emission port of the X-ray generating device, while shielding other directions; the function of S2 is to reduce the reflection of X-rays while ensuring that X-ray image quality; the function of S3 is to strengthen the local protection of the operation position, so that the radiation of the operation position is reduced to below 2.5uSv/h.

Experiments have shown that, as shown in Figure 5, when the exposure conditions are 50kV, 2.5mAs, and 6mA for exposure, the X-ray radiation intensity within a range of 2m with the X-ray tube as the center. The radiation dose rate of the operating position is below 2.5uSv/h, and its radiation value meets the requirements of the national standard "GBZ130-2013 Medical X-ray Diagnostic Radiation Protection Requirements" that the radiation of the equipment to the human body should be controlled below 2.5uSv/h. . In the region of the non-operational position, the X-ray radiation values of all positions are recorded in the X-ray radiation field.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", " The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, so as to The specific orientation configuration and operation are therefore not to be construed as limitations of the present invention.

It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but these information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

The above description is not intended to limit the technical scope of the present invention, and any modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (3)

1. The method for reducing the radiation of the X-ray detection environment is characterized in that: comprising: S1. X-ray emitting end: an X-ray shielding structure (10) is provided at the X-ray generating device, the X-ray shielding structure (10) shields the X-ray tube (20), and the X-ray tube (20) ) emitted X-rays are emitted from the emission port of the X-ray generating device; S2. Receiving end: a protective medium and a first shielding plate are set on the detected person, the detected person is located between the protective medium and the first shielding plate, and the protective medium covers the detected part of the detected person , an X-ray digital detector for imaging is arranged between the detected person and the first shielding plate, the protective medium is arranged between the X-ray generating device and the detected part, and the X-ray of the X-ray generating device The X-rays emitted by the bulb (20) are directed towards the protective medium through the X-ray exit port (111) of the shielding shell (11) of the X-ray shielding structure (10); S3. Operation end: a second shielding plate is arranged between the operator and the X-ray generating device. 2. The method for reducing radiation in an X-ray detection environment according to claim 1, characterized in that: the X-ray shielding structure (10) comprises an insulation that is fixedly installed in the inner cavity of the shielding shell (11) The lead frame (12), the X-ray tube (20) are arranged in the inner cavity of the shielding shell (11), the shielding shell (11) is provided with an X-ray exit port (111), the X-ray tube (111) (20) The X-rays generated are emitted through the X-ray exit port (111), and the cables connected at the X-ray tube (20) are guided out of the shielding casing (11) through the insulated lead frame (12) , the shielding shell (11) is provided with a wiring channel (112), the wiring channel (112) is provided with a corner, and the cables connected at the X-ray tube (20) pass through the wiring channel (112) in turn. 112) of the inlet, the corner, and the outlet, which are then led out from the X-ray shielding structure (10); the insulated lead frame (12) is provided with a cable insulation channel (121) along the cable track (112) , the cable insulation channel (121) is provided between the cable and the cable channel (112), and the cable insulation channel (121) separates the cable from the cable channel (112) open. 3 . The method for reducing radiation in an X-ray detection environment according to claim 1 , wherein the second shielding plate has a width of at least 60 cm and a height of at least 160 cm. 4 .

Images