Transmission imaging device

Abstract

The utility model provides a transmission imaging device which comprises a shell and a flat panel detector, a ray source is arranged in the shell, a protection plate is arranged on the side face of the shell, and a ray channel is formed in the center of the protection plate. The flat panel detector is used for receiving rays emitted by the ray source, converting the received rays into optical signals and digital signals and sending out the digital signals; the radiation source and the flat panel detector are of a separated structure, so that the range of the thickness and the size of a detected target is increased, and the application range of the device is expanded. The device is not limited by the space between the flat panel detector and the radiation source, and not only can be used for detecting objects with small size, small thickness and small span, but also can be used for detecting complex large objects such as vehicles. And the transmission depth and the image resolution are ensured on the premise that the influence of the flying spot size and the beam intensity is avoided.

Description

Technical Field

[0001] This application relates to the field of transmission imaging technology, and more specifically, to a transmission imaging device. Background Technology

[0002] X-ray imaging technology is generally divided into transmission imaging and backscatter imaging. Transmission imaging technology is widely used in medical, security, industrial, and food fields due to its clear images and high resolution. Backscatter imaging technology is a single-sided X-ray imaging detection technique. Due to its single-sided imaging characteristics and the effect of brightening organic matter, it is very suitable for detecting large objects, explosive devices in walls / underground structures, and eavesdropping devices.

[0003] In recent years, to further adapt to the needs of in-situ detection, handheld portable imaging technology has been continuously innovated. However, standalone handheld backscatter imaging devices have drawbacks such as poor penetration and insufficient image resolution in practical applications. In existing technologies, portable EOD detection solutions use portable X-ray machines and flat panel detectors to achieve transmission imaging of the target. This imaging method is technically mature, with clear transmission images and high image resolution. However, it has disadvantages such as large size and weight of the radiation source and high power of the radiation source, which is not conducive to imaging setup in narrow spaces. When operating or using it at close range, its radiation leakage is relatively large and difficult to protect against, thus increasing the operational risks for on-site personnel.

[0004] In summary, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0005] The purpose of this application is to provide a transmission imaging device that can provide low-dose, high-resolution imaging and reduce the risk of radiation exposure to operators.

[0006] In a first aspect, a transmission imaging device is provided, comprising:

[0007] The housing contains a radiation source and a protective plate on its side. A radiation channel is located at the center of the protective plate, and the radiation channel is arranged in the same direction as the radiation emission direction. The two ends of the radiation channel are an inlet and an outlet, respectively. The radiation emitted by the radiation source enters the radiation channel through the inlet and is emitted from the outlet. The radiation channel has a conical structure, and the axis of the conical structure is arranged along the radiation emission direction.

[0008] The flat panel detector is set at a predetermined distance from the housing during use, and the predetermined distance is adjustable; the flat panel detector is used to receive the radiation emitted by the radiation source.

[0009] In an embodiment, a protective coating is arranged on the inner wall of the channel, and the protective coating is used to absorb scattered X-rays.

[0010] In an embodiment, the longitudinal section of the ray channel comprises at least a rectangle, a triangle, a quadrilateral, or a hexagon.

[0011] In an embodiment, the longitudinal section of the ray channel is a rectangle, and the ray channel comprises a left side, a right side, an upper side, and a lower side, and the angle between the upper side and the horizontal plane is 20-80°, and the angle between the left side and the vertical plane is 20-80°.

[0012] In an embodiment, the flat panel detector is an amorphous silicon flat panel detector.

[0013] In an embodiment, a handle is arranged on the shell, and the handle is used for the operator to hold and use.

[0014] In an embodiment, a control button is arranged on the handle, and the control button is in communication connection with the ray source, and is used to control the opening and closing of the ray source.

[0015] In an embodiment, a laser outline lamp is arranged on the outer side of the protective plate, and the laser outline lamp is used to emit a light source to the flat panel detector to display an imaging area or a detection area.

[0016] In an embodiment, a display screen is arranged on the shell, and the display screen is used to receive and display digital signals from the flat panel detector to display a transmission image of the measured target.

[0017] In an embodiment, a camera and / or a fill light are arranged on the outer side of the protective plate.

[0018] Compared with the prior art, the application has the following beneficial effects:

[0019] The technical solution of this application can detect not only small, thin, and narrow-span items, but also complex and large items such as vehicles. Furthermore, it ensures transmission depth and image resolution without being affected by the size of the flying point or the beam intensity. By using a low-power X-ray source through the beam outlet design, radiation leakage can be reduced, improving the safety of the detection system and personnel operation. By designing the beam outlet in a conical shape, the penetration capability, image signal-to-noise ratio, and image resolution of this application can be improved. By adopting a separate structure for the X-ray source and the flat panel detector, the range of thickness and volume of the measured target can be increased, expanding the application scope of this application. Remote control via an external operating terminal further reduces the radiation dose received by the operator. Simultaneously, the external operating terminal can be configured with modules such as artificial intelligence algorithms to assist the operator in identifying suspicious items based on the transmitted images. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the transmission imaging device according to an embodiment of the present invention.

[0021] Figure 2 This is a diagram of the transmission imaging effect in existing technology.

[0022] Figure 3 This is a transmission imaging effect diagram of the transmission imaging device according to an embodiment of the present invention.

[0023] The reference numerals in the attached figures are explained as follows:

[0024] 1. Laser outliner; 2. Fill light; 3. Camera; 4. Target detection; 5. Beam exit; 6. Flat panel detector; 7. Display screen; 8. Control buttons; 9. Handle; 10. Protective plate. Detailed Implementation

[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0026] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "connection", "connection" should be broad sense understanding, for example, can be fixed connection, can also be detachable connection, or integrally connected;Can be mechanical connection, can also be electrical connection;Can be directly connected, can also be indirectly connected through the intermediate medium, can be the communication inside two elements.For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning in the utility model.

[0028] In addition, in the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more than two.

[0029] Referring to Figure 1 The utility model provides a kind of transmission imaging device, including shell, radiation source is arranged in the shell, protective plate 10 is arranged on the side of the shell, the center of the protective plate 10 is arranged radiation channel, the arrangement direction of the radiation channel is consistent with radiation emission direction, the two ends of the radiation channel are light inlet and beam outlet 5 respectively, the radiation emitted by the radiation source enters the radiation channel from light inlet, and is emitted from the beam outlet 5.The radiation channel is conical tower structure, and the axis of conical tower structure is arranged along the radiation emission direction.The present application is limited by the setting of protective plate 10 to radiation emission.By being conical tower shape, the beam-out mode of X-ray is limited, compared with the fly point imaging mode in the prior art, with stronger penetration ability, the present embodiment can penetrate 50mm stainless steel plate material, also can improve image signal-to-noise ratio and image resolution, the present embodiment can increase image resolution to 3lp / mm.

[0030] It should be noted that the protective plate 10 has a predetermined thickness, so that the radiation channel has a predetermined length.

[0031] Flat panel detector 6 is used to receive the radiation emitted by the radiation source.By adopting a separate structure of the radiation source and the flat panel detector 6, the thickness and volume range of the measured target is increased, and the use range of the present application is expanded.

[0032] It should be noted that the size and specification of the flat panel detector 6 can be determined according to the actual imaging area requirement and the space requirement of the on-site detection environment.The size of the measured target can also be moved, and the shell or the flat panel detector 6 can also be moved to increase the use range of the present application, such as scanning larger volume of truck box, etc.

[0033] In an implementable manner, a protective coating is provided on the inner wall of the channel, which is used to absorb scattered X-rays and reduce the radiation exposure of the operator.The protective coating can be made of high-atomic-number Cu, Pb and other alloy materials.

[0034] It should be noted that the protective plate 10 is preferably made of tungsten, tungsten steel or lead, which has good X-ray shielding effect.

[0035] In an embodiment, the longitudinal section of the ray channel comprises at least a rectangle, a triangle, a quadrilateral, a hexagon.

[0036] In the embodiment, the longitudinal section of the ray channel is a rectangle; the ray channel comprises a left side, a right side, an upper side and a lower side, the angle between the upper side and the horizontal plane is 20-80°, and the angle between the left side and the vertical plane is 20-80°.

[0037] Specifically, in the embodiment, the angle between the upper side and the horizontal plane is 60°, and the angle between the left side and the vertical plane is 35°. Therefore, the beam angle of the X-ray emitted through the ray channel in the application is 60°×35°, so as to further improve the image signal-to-noise ratio and image resolution of the application.

[0038] In an embodiment, the flat panel detector 6 is an amorphous silicon flat panel detector 6 (a-Si).

[0039] In an embodiment, a handle 9 is arranged on the shell, which is used for the operator to hold and use, so as to make the application more portable.

[0040] In an embodiment, a control button 8 is arranged on the handle 9, which is in communication connection with the ray source, and is used for controlling the opening and closing of the ray source.

[0041] In an embodiment, a laser outline lamp 1 is arranged on the outer side of the protective plate 10, which is used for emitting light source onto the flat panel detector 6 to display the imaging area or the detection area, so that the operator can determine whether the imaging area or the detection area is completely displayed on the flat panel detector 6, thereby adjusting the position of the ray source to avoid imaging in the predetermined area, and unable to normally read the detection result and the like.

[0042] In an embodiment, a camera 3 and a fill light 2 are further arranged on the outer side of the protective plate 10, the fill light 2 is used for lighting in the case of insufficient lighting, and the camera 3 is used for taking photos of the measured environment.

[0043] In an embodiment, a display screen 7 is arranged on the shell, which is used for receiving and displaying digital signals from the flat panel detector 6, so as to display the transmission image of the measured target at one end of the ray source.

[0044] It should be noted that the shell is provided with a power supply for powering the device. The power supply includes but is not limited to a battery, the battery is a polymer lithium battery with a capacity less than or equal to 99Wh, so that the high voltage of the ray source can be adjusted in the range of 50-160kV, and the tube current can be adjusted in the range of 10uA-100uA. By using the ray source with low power operation, the radiation leakage can be reduced, and the safety of the detection system and personnel operation can be improved.

[0045] It should also be noted that the shell is provided with a control circuit, which includes but is not limited to a ray source driving control circuit, a camera 3 component driving control circuit, a power charging and discharging management and a subsystem power distribution circuit, a WIFI&Bluetooth module, a CPU processor circuit, etc.

[0046] In an implementable manner, the application can also provide a remote control module, which communicates the control circuit with an external operation end, including but not limited to a tablet computer, a mobile phone, etc., and drives the ray source through the external operation end. The shell and the flat panel detector 6 are placed at a predetermined position through a support, and are remotely controlled through the external operation end, further reducing the radiation dose received by the operator. At the same time, the external operation end can also be configured with an artificial intelligence algorithm module to assist the operator in identifying suspicious articles according to the transmission image.

[0047] It should be noted that the image information captured by the camera 3 component and the imaging information received by the flat panel detector 6 can be displayed on the screen of the remote control component, further reducing the risk of the operator being exposed to radiation leakage.

[0048] In use, the flat panel detector 6 is placed at the back side of the detected article, and the ray source is placed at the front side of the detected article. The distance between the flat panel detector 6 and the ray source can be adjusted according to the condition of the detected article. The ray source is turned on by the control button 8, the X-ray is emitted through the ray channel, and the flat panel detector 6 detects the X-ray reaching the surface to form a transmission image after the X-ray penetrates the detection target 4. The exposure time is usually less than 3 seconds, the transmission image can be transmitted in the form of wireless transmission, and displayed on the display screen 7. In summary, the application is not limited to the space between the flat panel detector 6 and the ray source, which can not only detect small, thin and low-span articles, but also detect complex large articles such as vehicles. Figure 2 and Figure 3The transmission depth and the image resolution are ensured without being affected by the size of the flying spot and the beam intensity. By setting the beam exit 5, a low-power ray source can be used to reduce radiation leakage and improve the safety of the detection system and personnel operation. By setting the beam exit 5 as a cone tower, the penetration ability of the application can be improved, and the image signal-to-noise ratio and the image resolution can be improved. By using a separate structure for the ray source and the flat panel detector 6, the thickness and volume range of the measured target can be increased, and the use range of the application can be expanded. Remote control is performed through the external operation end, further reducing the radiation dose received by the operator. At the same time, the external operation end can also be configured with an artificial intelligence algorithm and other modules to assist the operator in identifying suspicious items according to the transmission image. The application has good metal detection ability, clear transmission image, high resolution, and the whole machine is convenient to carry and use, and can quickly complete the arrangement for large goods, and is beneficial to popularization and use.

[0049] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and replacements can be made without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A transmission imaging apparatus characterized by comprising: The application relates to a portable X-ray machine, which comprises the following parts: a shell, a radiation source arranged in the shell, a protective plate arranged on the side of the shell, a radiation channel arranged at the center of the protective plate, the arrangement direction of the radiation channel being consistent with the radiation emission direction, the two ends of the radiation channel being an entrance and an exit respectively, the radiation emitted by the radiation source entering the radiation channel through the entrance and being emitted from the exit; the radiation channel is a conical tower structure, and the axis of the conical tower structure is arranged along the radiation emission direction; a flat panel detector arranged at a predetermined distance from the shell during use, the predetermined distance being adjustable; the flat panel detector is used for receiving the radiation emitted by the radiation source.

2. The transmission imaging apparatus according to claim 1, characterized in that, A protective coating is arranged on the inner wall of the channel, and the protective coating is used for absorbing scattered X-rays.

3. The transmission imaging apparatus according to claim 1, characterized by, The longitudinal section of the radiation channel at least comprises a rectangle, a triangle, a quadrilateral and a hexagon.

4. The transmission imaging apparatus according to claim 1, characterized by, The longitudinal section of the radiation channel is a rectangle; the radiation channel comprises a left side, a right side, an upper side and a lower side, the included angle between the upper side and the horizontal plane is 20-80 DEG, and the included angle between the left side and the vertical plane is 20-80 DEG.

5. The transmission imaging apparatus according to claim 1, characterized by, The flat panel detector is an amorphous silicon flat panel detector.

6. The transmission imaging apparatus according to claim 1, characterized by A handle is arranged on the shell, and the handle is used for being held by an operator.

7. The transmission imaging apparatus according to claim 6, characterized in that, A control button is arranged on the handle, the control button is in communication connection with the radiation source, and the control button is used for controlling the opening and closing of the radiation source.

8. The transmission imaging apparatus according to claim 1, characterized by, A laser outline lamp is arranged on the outer side of the protective plate, the laser outline lamp is used for emitting a light source to the flat panel detector to display an imaging area or a detection area.

9. The transmission imaging apparatus according to claim 1, characterized by, A display screen is arranged on the shell, the display screen is used for receiving and displaying digital signals from the flat panel detector to display a transmission image of a measured target.

10. The transmission imaging apparatus according to claim 1, characterized by, A camera and / or a fill light are arranged on the outer side of the protective plate.

Images