WO2019214724A1 - 组合扫描x射线发生器、复合检查设备以及检查方法 - Google Patents
组合扫描x射线发生器、复合检查设备以及检查方法 Download PDFInfo
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Definitions
- Embodiments of the present disclosure relate to the field of radiation generation technology, and more particularly to a combined scanning X-ray generator, a composite inspection apparatus, and an inspection method.
- X-ray transmission and backscatter imaging technologies have been widely used in security inspections.
- Transmission imaging technology has good penetrability and high spatial resolution. According to the degree of attenuation of X-rays passing through different substances, it is sensitive to high atomic number and substance such as copper and iron, with clear imaging and better recognition effect.
- Backscatter imaging technology has low radiation dose and good safety. Although it has limited penetrating ability, it is more sensitive to low atomic number materials and has good detection effect for drugs, gasoline and explosives.
- backscatter imaging technology adopts points.
- the beam scanning method requires a fan beam or a cone beam generated by a conventional X-ray generator to be modulated into a pencil beam.
- the combined scanning X-ray generator comprises: a casing; an anode disposed in the casing, the anode comprising a first anode end and an anode second end; a pencil beam radiation source disposed at the first end of the anode, configured Ejecting a pencil-shaped X-ray beam, wherein the pencil beam radiation source comprises a first cathode, the first cathode being configured to emit electrons in a pencil beam radiation source toward a first end of the anode; a fan beam radiation source disposed at the anode second An end configured to emit a fan-shaped X-ray beam, wherein the fan beam radiation source includes a second cathode configured to emit electrons toward the second end of the anode within the fan beam radiation source; wherein the pencil beam source and the fan shape
- the beam source can operate independently.
- an embodiment of the present disclosure provides a composite inspection apparatus including a plurality of inspection channels and at least one of the above-described combined scanning X-ray generators,
- each combined scanning X-ray generator is configured to emit a pencil-shaped X-ray beam and a fan-shaped X-ray beam, the pen-shaped X-ray beam being adapted to perform backscatter scanning on an object to be inspected in an inspection channel,
- the fan-shaped X-ray beam is adapted to perform a transmission scan of an object to be inspected in another inspection channel.
- an embodiment of the present disclosure provides a composite inspection apparatus including a first inspection passage, a second inspection passage, and a one disposed between the first inspection passage and the second inspection passage, such as The above combined scanning X-ray generator and corresponding detector,
- the X-ray generator is configured to emit a pencil-shaped X-ray beam, the Pen-shaped X-ray beam being adapted to perform backscatter scanning on an object to be inspected in the first inspection channel and configured to emit a fan-shaped X-ray beam
- the fan-shaped X-ray beam is adapted to perform a transmission scan of the object to be inspected in the second inspection channel.
- an embodiment of the present disclosure provides an inspection method for a target to be inspected using the composite inspection apparatus described above, the method comprising:
- the second object to be inspected is passed through another inspection channel to perform a transmission scan of the second object to be inspected using the fan-shaped X-ray beam.
- an embodiment of the present disclosure provides a composite inspection apparatus for a human body, including:
- the scanning X-ray generator described above is configured to be capable of independently generating a pencil-shaped X-ray beam for backscatter detection and a sector X-ray beam for transmission detection, wherein the pencil-shaped X-ray beam is capable of scanning a sector-shaped area, the sector X-ray beam Having a fan-shaped profile covering a sector area;
- a first detector for detecting a pen-shaped X-ray beam scattered by a human body
- a second detector for detecting a fan-shaped X-ray beam transmitted through the human body
- an inspection channel for the body to be inspected is defined between the first detector and the second detector.
- an embodiment of the present disclosure provides an inspection method for a human body, including performing a human body inspection using the above-described composite inspection apparatus, wherein the inspection method includes:
- the scanning X-ray generator is used to emit a fan-shaped X-ray beam to perform transmission detection on the human body again.
- an embodiment of the present disclosure provides a method of inspecting a target to be inspected using the above-described composite inspection apparatus, the method comprising:
- the object to be inspected is subjected to backscatter scanning.
- FIG. 1 shows a schematic cross-sectional view of a combined scanning X-ray generator of one embodiment of the present disclosure
- FIG. 2 shows a schematic view of a sealing joint of one embodiment of the present disclosure
- FIG. 3 is a cross-sectional view showing a protective drum of a first end of an anode of a combined scanning X-ray generator of an embodiment of the present disclosure
- FIG. 4 is a cross-sectional view showing a collimator of a second end of an anode of a combined scanning X-ray generator of an embodiment of the present disclosure
- FIG. 5 shows a schematic diagram of an X-ray beam at both ends of a combined scanning X-ray generator of an embodiment of the present disclosure
- FIG. 6 shows a schematic diagram of an X-ray beam at both ends of a combined scanning X-ray generator of an embodiment of the present disclosure
- FIG. 7 is a view showing a positional relationship of X-ray beams at both ends of a combined scanning X-ray generator of an embodiment of the present disclosure, wherein a diagram of FIG. 7 is a schematic view showing an X-ray beam at both ends, and FIG. 7b The figure shows the positional relationship between the opening angle of the scanning range of the pen-shaped X-ray beam and the opening angle of the fan-shaped X-ray beam
- FIG. 8 is a schematic diagram of an overall configuration and method of use of a dual channel composite inspection apparatus in accordance with an embodiment of the present disclosure
- FIG. 9 is a schematic diagram of a state in which a two-channel composite inspection apparatus of an embodiment of the present disclosure is cascaded;
- FIG. 10 is a schematic view showing a composite inspection apparatus for a human body according to an embodiment of the present disclosure.
- Figure 11 is a schematic view of the first detector of the embodiment of the present disclosure as seen in the direction of B in Figure 8;
- FIG. 12 is a cross-sectional view showing a regulator of an inspection apparatus collimator of a fan beam radiation source of a scanning X-ray generator of an embodiment of the present disclosure.
- top side and bottom side are orientations of the upper side and the lower side of the object which are normal with respect to the normal case.
- a combined scanning X-ray generator of one embodiment of the present disclosure comprising: a housing; an anode disposed within the housing, the anode including an opposing first end of the anode and a second end of the anode a pencil beam radiation source disposed at the first end of the anode and configured to emit a pencil-shaped X-ray beam, wherein the pencil beam radiation source includes a first cathode, the first cathode being configured to face the anode within the pencil beam radiation source One end emits electrons; a fan beam source is disposed at the second end of the anode and configured to emit a fan-shaped X-ray beam, wherein the fan beam source includes a second cathode, and the second cathode is configured to radiate in a fan beam Electrons are emitted within the source toward the second end of the anode.
- the combined scanning X-ray generator can emit two X-rays to realize simultaneous irradiation of two objects by a single X-ray tube, which can save space compared to the prior art, which requires two sets of X-ray generating devices. This is especially beneficial for situations where there are limited venues.
- the combined scanning X-ray generator of the present embodiment can simultaneously provide a pencil-shaped X-ray beam and a fan-shaped X-ray beam, so that the application of the combined scanning X-ray generator is wider and the adaptability is improved.
- the pencil beam source and the fan beam source can be considered to share one anode.
- the pencil beam radiation source 1 and the fan beam radiation source 2 can be operated independently.
- the pencil beam radiation source 1 and the fan beam radiation source 2 can be operated simultaneously, or can be operated according to a certain timing, and can also respectively emit X-ray beams of the same energy or X-ray beams of different energies, and these configurations will make the combination
- the use of the scanning X-ray generator is more flexible and adapts to different needs, and the function of the two X-ray generating devices is actually realized by a combined scanning X-ray generator.
- the components of the combined scanning X-ray generator of the present disclosure are packaged in a housing 6, and the pencil beam radiation source 1 and the fan beam radiation source 2 may be respectively packaged in two housing portions, respectively, and the anode housing 5 and the anode handle 5, respectively. The two ends are partially sealed.
- the first cathode 10 can be considered part of the pencil beam radiation source 1 and the second cathode 30 can be considered part of the fan beam radiation source 2.
- the first cathode 10 includes a first filament 11, a first focus mask 12, and a first filament lead 13;
- the second cathode 30 includes a second filament 31, a second focus mask 32, and a second filament lead 33.
- the first filament lead 13 and the second filament lead 33 are used for externally connecting the filament power supply and the negative pole of the high voltage power supply.
- the first filament 11 is coupled to a negative and filament power supply of a high voltage power supply for emitting electrons;
- the second filament 31 is coupled to a negative and filament power supply of the same high voltage power source for emitting electrons.
- the first filament 11 is connected to a negative electrode of a high voltage power supply and a filament power source for emitting electrons; the second filament 31 is connected to a negative electrode of the other high voltage power source and a filament power source for emitting electrons, thereby the first filament
- the voltage and current of the 11 and second filaments 31 can be individually controlled to achieve the independent operation of the aforementioned pencil beam source 1 and fan beam source 2.
- the first focus mask 12 and the second focus mask 32 can focus on electrons and also serve as a supporting cathode.
- the first focus cover 12 is provided with an opening for electron emission, the other portion is sealed, electrons are not scattered into the environment, and the second focus cover 32 is similar.
- the centers of the first filament 11, the second filament 31, the first target 23, and the second target 43 are on the same horizontal line.
- one end of the outer casing 6 is welded to the first focus cover 12, and the other end of the outer casing 6 is welded to the second focus cover 32.
- the outer casing 6 may be made of hard glass, corrugated ceramic or cermet.
- the portion of the outer casing 6 for transmitting X-rays may be embedded in the window.
- the pencil beam radiation source 1 and the fan beam radiation source 2 can be operated independently, whereby the energy of the two X-ray beams emitted by the combined scanning X-ray generator can be individually controlled.
- the voltage applied between the first cathode 10 and the first end 20 of the anode is equal to the voltage applied between the second cathode 30 and the second end 40 of the anode, such that the pencil beam source 1 and the sector The beam radiation source 2 produces the same X-ray energy.
- the combined scanning X-ray generator is configured such that the voltage applied between the first cathode 10 and the first end 20 of the anode is not equal to the voltage applied between the first cathode 10 and the first end 20 of the anode.
- the X-ray energy generated by the pencil beam radiation source 1 and the fan beam radiation source 2, respectively, is different.
- the combined scanning X-ray generator of the present embodiment can simultaneously emit two different types of pen-shaped X-ray beams and sectors.
- the X-ray beam completes the detection, which improves the detection efficiency, enhances the adaptability of the combined scanning X-ray generator, and greatly improves the application range of the device.
- the pencil beam radiation source 1 includes a first target 23 disposed at an end surface of the first end 20 of the anode, the first target 23 is subjected to electron bombardment to emit X-rays, and the fan beam radiation source 2 includes a second target 43. At the end face of the second end 40 of the anode, the second target 43 is subjected to electron bombardment to emit X-rays.
- the end surface of the first end is not perpendicular to the extending direction of the length of the anode
- the end surface of the second end is not perpendicular to the extending direction of the length of the anode.
- the pencil beam radiation source 1 and the fan beam radiation source 2 can be operated independently, so that the first target 23 and the second target 43 can emit X-rays synchronously or asynchronously.
- the pencil beam radiation source 1 includes a protective drum 211 configured to modulate the X-rays emitted by the first target 23 into a pencil-shaped X-ray beam.
- the fan beam radiation source 2 includes a collimator 41 configured to modulate the X-rays emitted by the second target 43 into a fan-shaped X-ray beam.
- FIG. 1 does not show a collimator disposed in front of the first target 23 to limit the X-ray exit range.
- the X-rays emitted by the first target 23 may be fan-shaped X-rays.
- the opening angle of the collimator determines the opening angle of the outgoing face beam of the sector X-ray.
- the protective drum 211 surrounds the first end 20 of the anode and allows electrons to pass through the end face of the protective drum 211, for example, an end opening or hole is provided, bombards the first target 23, and limits the X-rays emitted by the first target 23, so that the first The X-rays emitted by the target 23 can only be emitted from the protective drum exit hole 212 to form a pencil-shaped X-ray beam.
- the protective drum 211 is configured to be rotatable about the first end 20 of the anode such that the pencil-shaped X-ray beam formed by the protective drum exit aperture 212 is scanned over a range of angles.
- the pencil beam radiation source 1 further includes an armature core 215 disposed on the anode near the anode first end 20 and an armature winding 214 surrounding the armature core 215, and a corresponding armature.
- the core 215 is disposed on the inner wall of the protective drum 211 with a plurality of permanent magnets 213 such that the armature winding 214 interacts with the plurality of permanent magnets 213 to drive the protective drum 211 around the armature winding 214 to form a varying magnetic field.
- the first end 20 of the anode rotates.
- a portion of the anode first end 20 remote from the first target 23 is provided with a routing conduit 51, and one end of the driver 217 is connected to the field winding 214 via a cable 218, and the cable at the other end is connected.
- the 219 is connected to the inner side of the sealing joint 52 through the wire duct 51.
- the armature winding 214 is continuously commutated to form a rotating magnetic field, interacting with the magnetic field generated by the plurality of permanent magnets 213, and pushing the protective drum 211 to perform a circular motion with the center line of the first end 20 of the anode as an axis.
- the fan-shaped X-ray beam is modulated into a scanning-shaped pen-shaped X-ray beam by the rotational motion of the protective drum exit hole 212.
- the anode of the combined scanning X-ray generator further includes an anode shank 5 coupled to the outer casing 6 for securing the anode inside the outer casing 6.
- a routing passage 51 may be provided in the anode shank 5.
- the anode shank 5 includes a sealing joint 52 having a structure as shown in Fig. 2, consisting of a glass stem 521 and a conductive pin 522 sintered therein.
- the glass stem 521 is melted into a closed whole body with the anode handle 5 by a process such as sintering; the conductive pin 522 has one end connected to the inner wire of the pencil beam radiation source 1 and the other end connected to the outside of the X-ray tube.
- This lead method ensures that the inside of the X-ray tube is in a vacuum state.
- other sealing and fixing patterns such as flange extrusion O-ring seals, are also available.
- the protective drum 211 and the outer top ring 223 may be made of tungsten or tungsten alloy material, so that the protective drum 211 and the outer top ring 223 together can effectively achieve X-ray radiation protection.
- the anode first end 20, the sleeve 221, and the inner top ring 222 are preferably copper or copper alloy materials that facilitate heat dissipation while providing some X-ray radiation protection.
- the sleeve 221 is nested adjacent the first end 20 of the anode, the bearing 220 is fitted over the sleeve 221, and the inner wall of the inner ring of the bearing 220 is sleeved over the sleeve 221.
- the inner ring of the bearing 220 is constrained by the upper shoulder of the sleeve 221 and the inner top ring 222, and the outer ring is limited by the flange of the protective drum 211 and the outer top ring 223.
- the protective drum 211 is mounted through the outer wall of the outer ring of the bearing 220.
- the inner wall of the protective drum 211 is fastened with a plurality of permanent magnets 213 and is in a uniformly distributed state.
- the driver 217 is placed on one side of the armature core 215 and is secured to the first end 20 of the anode by a collar 216.
- One side of the target 23 is provided with a wiring hole 51, one end of the driver 217 is connected to the field winding 214 via a cable 218, and the other end of the cable 219 is connected to the inner side of the sealing joint 52 through the wire hole 51.
- the armature winding 214 is continuously commutated to form a rotating magnetic field, which interacts with the magnetic field generated by the permanent magnet 213 to push the protective drum 211 to perform a circular motion with the center line of the first anode rod 22 as an axis.
- the fan-shaped X-ray beam is modulated into a continuous pencil-shaped X-ray beam by the rotational motion of the protective drum exit hole 212.
- the protective drum 211, the sleeve 221, the outer top ring 223 and the first anode rod 22 constitute a nearly closed, well-performing X-ray shielded chamber.
- the collimator 41 surrounds the second end 40 of the anode, allows electrons to bombard the second target 43 through the collimator 41, and limits the X-rays emitted by the second target 43 such that the X emitted by the second target 43
- the ray can only be emitted from the collimator outlet 411 to form a fan-shaped X-ray beam.
- FIG. 4 shows a cross-sectional view of the collimator 41.
- the collimator 41 has a fan-shaped opening, that is, a collimator outlet 411.
- the shape of the collimator outlet 411 determines the contour of the emitted X-ray beam.
- the end face of the collimator 41 is also provided with an opening or hole for allowing electrons to enter the collimator 41, and electrons are incident from an opening or hole in the end face of the collimator 41 to bombard the second target 43, thereby generating X-rays.
- the collimator 41 can have other shapes, however, the collimator 41 needs to shield scattered electrons and generated X-rays, not only to prevent damage to the surrounding environment by electrons and rays, but also to generate a desired X-ray beam.
- the collimator 41 can be made of a tungsten or tungsten alloy material, and is effective for X-ray protection.
- the protective drum 211 and the collimator 41 may respectively modulate X-rays emitted from the first target 23 and the second target 43, including modulation of the opening angle, emission direction, and the like of the formed sector X-ray beam feature.
- the protective drum 211 and the collimator 41 control the shape and direction of the X-ray beam, and the energy of the X-ray beam is controlled by the high voltage power source between the anode and the cathode when bombarded onto the first target 23.
- the electron energy is high, the X-ray energy emitted from the first target 23 is high.
- a desired X-ray beam can be obtained at both ends of the combined scanning X-ray generator, respectively.
- a first collimator may be disposed in front of the first target 23 of the anode first end 20, and the first collimator limits the X-rays emitted by the first target 23.
- shaping for example, forming a first fan-shaped X-ray beam, and the first fan-shaped X-ray beam is further formed into a pen-shaped X-ray beam through the protective drum 211, and the angle of the exit of the first collimator defines that the pencil-shaped X-ray beam can be scanned. Amplitude.
- the pencil-shaped X-ray beam emitted by the protective drum exit aperture 212 and the sector X-ray beam emitted by the collimator exit 411 are respectively located in two parallel planes. As shown in Figure 5, the X-rays emitted by the anode first end 20 and the anode second end 40 are downward and are located in two parallel faces. It should be understood that FIG. 5 is for illustrative purposes only, the X-rays emitted by the anode first end 20 and the anode second end 40 may be simultaneously upward, in two parallel faces.
- the X-rays emitted by the first end 20 of the anode are upward and the X-rays emitted by the second end 40 of the anode are downward.
- the end faces of the first end 20 of the anode and the end faces of the second end 40 of the anode are opposite.
- the left end face faces obliquely upward and the right end face faces obliquely downward.
- the scanning coverage or scanning amplitude of the pencil-shaped X-ray beam emitted by the protective drum exit hole 212 and the coverage of the sector X-ray beam emitted by the collimator outlet 411 do not overlap when viewed along the length of the anode. , partially overlapping or completely coincident.
- Figure 7 depicts the overlapping relationship of the scanning coverage of the pencil-shaped X-ray beam emitted by the protective drum exit aperture 212 and the coverage of the sector X-ray beam emitted by the collimator exit 411.
- Fig. 7 is only a schematic representation of the positional relationship of the X-ray beams at both ends of the combined scanning X-ray generator, simplifying other components such as a protective drum, a collimator, and the like in the view.
- the scanning range or amplitude of the pen-shaped X-ray beam emitted from the protective drum exit hole 212 corresponding to the first target 23 is ⁇ 1
- the collimator outlet 411 corresponding to the second target 43 is emitted.
- the opening angle of the fan-shaped X-ray beam is ⁇ 2
- the angle of the overlapping portion of the two X-ray beam opening angle ranges is ⁇ 3 as shown in Fig. 7b.
- the effective X-ray beam opening angle ⁇ in the specific embodiment is not less than ⁇ 1 or ⁇ 2 , and the corresponding relationship is:
- the protective drum scan range or amplitude of perforations 212 emitted from the X-ray pencil beam collimator opening angle ⁇ 1 and the same exit aperture angle [alpha] X-ray beam 2411 emitted from the fan.
- the opening angle ⁇ 1 of the scanning range or amplitude of the pencil-shaped X-ray beam emitted from the protective drum exit hole 212 is different from the opening angle ⁇ 2 of the sector X-ray beam emitted by the collimator outlet 411.
- the anode shank 5 can also be configured to connect the positive pole of the high voltage power supply, and in particular, can be directly grounded for the negative high voltage power supply.
- the anode shank 5 can be part of the anode, in other words the anode is a one-piece piece.
- the anode shank 5 can be a component that is coupled to the anode.
- the anode and anode shanks 5 may be made of copper or a copper alloy. This is advantageous for conducting electricity and reducing electrical resistance; moreover, it is advantageous for heat dissipation; in addition, it has certain X-ray radiation protection capability.
- the anode is comprised of an anode first end 20 and an anode second end 40, and the anode first end 20 and the anode second end 40 are rotatable relative to each other.
- the angle between the anode first end 20 and the anode second end 40 is rotated such that the guard drum exit aperture 212 and the collimator outlet 411 are misaligned at an angle relative to the original setting.
- the pencil-shaped X-ray beam and the fan-shaped X-ray beam respectively emitted from the pencil beam radiation source 1 of the anode first end 20 and the fan beam radiation source 2 of the anode second end 40 are respectively located in two parallel planes.
- the scanning range of the pen-shaped X-ray beam and the fan-shaped X-ray beam coincide in the direction along the central axis of the anode.
- the scanning range of the pencil-shaped X-ray beam and the sector X-ray beam can be shifted by an angle in the direction along the central axis of the anode.
- the X-ray tube component of the combined scanning X-ray generator is packaged in a casing 6, and the pencil beam radiation source 1 and the fan beam radiation source 2 may be respectively packaged in two casings,
- the outer casing is sealingly connected to both end portions of the anode shank 5, respectively.
- FIG. 8 is a schematic diagram of an overall configuration and a method of use of a two-channel composite inspection apparatus according to an embodiment of the present disclosure.
- the dual-channel composite inspection apparatus generates a pen-shaped X-ray beam and a fan-shaped X-ray beam by using a single combined scanning X-ray generator, so that backscatter scanning and transmission scanning can be simultaneously performed on the objects to be inspected in the two inspection channels, respectively.
- the dual channel composite inspection apparatus of this embodiment mainly includes a host 320, a backscattering channel 330, and a transmission channel 340.
- the host 320 is the core component of the dual channel composite inspection device.
- the host 320 can include a combined scanning X-ray generator 21, which can have the same structural and functional settings as the combined scanning X-ray generator described above.
- the host 320 can also include a front collimator 322 and a backscatter detector 323.
- the host 320 may also include a console 325, a control module 326, a data acquisition module 327, and the like.
- the back channel 330 can include a transport mechanism 332.
- the backscatter target 331 e.g., human body
- the transmission channel 340 includes a transmission detector 342 and a transport mechanism 343.
- the transmission target 341 e.g., luggage
- the transmission target 341 is placed on the transport mechanism 343 and moves with the transport mechanism 343.
- the combined scanning X-ray generator 21 and the backscattering detector 323 are located on the same side of the backscattering target 331, and are located on the fixed shoe 324.
- the transmission target 341 disposed on the transport mechanism 343 passes between the combined scan X-ray generator 321 and the transmission detector 342.
- the combined scanning X-ray generator 21 produces a pen-shaped X-ray beam for backscatter scanning of the backscatter target 331 while generating a sector X-ray beam for transmission scanning of the transmission target 341.
- a fan-shaped X-ray beam refers to an X-ray beam having a fan-shaped profile.
- a certain angle i.e., angle ⁇ described later
- a one-sided scan of the backscatter target 331 is completed. If a double-sided scan of the backscatter target 3331 is required, the transport mechanism 332 can be caused to carry the backscatter target 331 back once to scan the other side of the backscatter target 331. It is to be noted that, when the transport mechanism 332 starts the return stroke, the backscatter target 331 is inverted by 180° so that the other side of the backscatter target 331 faces the combined scanning X-ray generator 21. In contrast to this, the scanning of the entire cross section of the transmission target 341 can be completed at the end of the single stroke of the transport mechanism 343.
- the two detectors 323 and 342 respectively sense the corresponding X-ray signals.
- the console 325 communicates with the control module 326 and the data acquisition module 327, and then performs data analysis and processing to finally generate corresponding backscattered images and transmitted images.
- the mainframe 320, the backscattering channel 330, and the transmissive channel 340 can be separate devices or can be assembled within the same shroud.
- the host 320, the back channel 330, and the transmission channel 340 may be on the same horizontal plane, or may be arranged in other spatial positional relationships.
- the dual channel composite inspection apparatus of the present embodiment performs electrical routing and the like in its bottom or head space while providing associated coupling means and fastening means.
- the combined scanning X-ray generator 21 and the backscatter detector 323 are located on the same side of the backscatter target 331 (right side in Figure 8).
- a conveying mechanism 343 for arranging the transmission target 341 is located between the combined scanning X-ray generator 21 and the transmission detector 342.
- the backscatter detector 323 receives an X-ray signal scattered back from the backscatter target 331, and the transmission detector 342 receives an X-ray signal that passes through the transmission target 341.
- console 325 is in communication with control module 326 and data acquisition module 327.
- the control module 326 causes the combined scanning X-ray generator 21 to simultaneously emit the pencil-shaped X-ray beam and the sector X-ray beam, activates the transport mechanism 332 and the transport mechanism 343, and triggers the data acquisition module 327 to collect the backscatter signal and
- the transmitted signal is then transmitted to the console 325 for data analysis and processing, ultimately resulting in a backscattered image of the object to be inspected 331 and a transmitted image of the object 341 to be inspected.
- the generated backscattered image and transmitted image can then be manually viewed or automatically identified by software to resolve the presence or absence of dangerous goods and to properly identify and alert.
- control module 376 can control the starting position, direction of rotation, and scan period of the pencil-shaped X-ray beam and the sector X-ray beam.
- the transport mechanism 332 and the transport mechanism 343 are simultaneously activated. After the one-side scanning of the backscatter target 331 and the scanning of the entire section of the transmission target 341 are completed, the transport mechanisms 332 and 343 stop moving. After the transport mechanism 332 stops moving, the backscatter target 331 is turned 180° (for example, in the case where the backscatter target 331 is a human body, the human body is turned 180°), and then the backscatter target 331 is returned with the transport mechanism 32. The scanning of the other side of the backscatter target 331 is thus completed.
- the combined scanning X-ray generator 21 of the present embodiment integrates a flying point source and a fan beam source on a single X-ray tube.
- the X-ray tube passes through two targets after turning on the high voltage power source and generates a pen-shaped X-ray beam and a fan-shaped X-ray beam that are the same or different in orientation and energy, respectively.
- the dual channel composite inspection apparatus of the present disclosure may be open or closed, and is not limited by auxiliary components such as a cabinet, a backing or a top cover.
- the position of the combined scanning X-ray generator, the opening angle of the X-ray beam, and the energy are not particularly limited, but may be appropriately selected according to actual application conditions. set up.
- the transmissive detector may be additionally mounted at the bottom of the transmissive channel according to the angular characteristic of the transmitted X-ray, thereby forming an L-shaped or other shaped transmissive detector with the existing transmissive detector, which may improve Detection efficiency.
- described above is a mode in which the host 320 is fixed while the back-to-back channels 330 and 134 in the transmission channel 340 move with their respective transport mechanisms. It will be appreciated that other modes of relative motion may also be employed.
- the present disclosure is applicable to the case of human and physical inspection, wherein the backscattering portion is used for detection of a human body, and the transmissive portion is used for detection of luggage, articles, and the like.
- the backscattering portion may be used for human detection; in this case, if a suspect is found, the transmissive portion is used for re-examination.
- the object to be inspected is not limited to the above-mentioned objects, and may be animals, goods or vehicles.
- the backscatter channel and the transmissive channel can be combined into one channel. In this way, backscatter detection and transmission detection can be completed simultaneously or in time for the same object to be inspected, thereby improving the detection capability.
- embodiments of the present disclosure have been described by way of example only as a dual channel composite inspection apparatus.
- the composite inspection apparatus of the present disclosure is not limited thereto.
- the above-described two-channel composite inspection apparatus may be cascaded, thereby forming a plurality of inspection passages, as shown in FIG.
- a part of the formed inspection channels may be simultaneously (or time-divisionally) completed on both sides of the same object to be inspected (for example, the front and back sides of the human body to be examined shown in FIG. 9). Scatter detection and/or transmission detection.
- each of the transmission channels can be used independently, and a full transmission scan of the object to be inspected can be completed by a single scan.
- the number of channels used in the cascade shown in Figure 9 is merely exemplary and not limiting. In practical applications, the user/operator of the compound inspection device can appropriately increase or decrease the number of channels used in cascade as needed.
- FIG. 10 illustrates a composite inspection apparatus for a human body in accordance with an embodiment of the present disclosure.
- the composite inspection apparatus includes: a scanning X-ray generator configured to independently generate a pencil-shaped X-ray beam for backscatter detection and a sector X-ray beam for transmission detection, wherein the pencil-shaped X-ray beam is capable of scanning a sector-shaped region, a fan-shaped X-ray beam having a fan-shaped profile to cover a sector-shaped region; a first detector for detecting a pen-shaped X-ray beam scattered by the human body; and a second detector for detecting a fan-shaped X-ray beam transmitted through the human body; An inspection channel for the body to be inspected is defined between a detector and the second detector.
- the scanning X-ray generator 311 is located on the right side of the figure, emitting X-rays toward the left side of the figure; a first detector 313a for detecting a pen-shaped X-ray beam scattered by the human body An inspection channel is defined between the second detector 313b for detecting a fan-shaped X-ray beam transmitted through the body, and the human body can receive an inspection in the inspection channel.
- the first detector 313a is disposed between the inspection channel and the scanning X-ray generator 311, and when the inspection is performed, the pen-shaped X-ray beam scans a sector, and the scanning range is set to cover, for example, a sector of the human body, which should It is known that the pen-shaped X-ray beam scanning range can be set according to actual conditions.
- the pen-shaped X-ray beam is incident on the human body, it will be scattered by the human body, and the first detector 313a faces the human body 314 to receive the scattered X-ray signal, and converts the received X-ray signal into, for example, an electrical signal to realize backscattering. Detection.
- the first detector 313a may be, for example, a flat plate shape, as shown in FIG. 11 as a first detector 313a.
- a slit is provided so that the pencil-shaped X-ray beam and the fan-shaped X-ray beam are projected to the human body through the first detector.
- a second detector 313b is disposed on a side of the inspection channel remote from the scanning X-ray generator for receiving X-rays transmitted through the human body 14, i.e., the left side of the figure.
- the second detector 313b may be C-shaped, that is, the second detector upper portion including the second detector vertical portion and the second detector vertical portion and the second detector connected to the second detector vertical portion The horizontal part of the lower side of the device.
- the shape of the second detector 313b shown in FIG. 10 is only an alternative shape, and the second detector 313b may have other shapes, such as a horizontal portion on the upper side of the second detector and a horizontal portion on the lower side of the second detector.
- the vertical portions of the two detectors are not connected, and only the upper side horizontal portion of the second detector and the lower horizontal portion of the second detector and the vertical portion of the second detector cover the X-rays transmitted through the human body.
- the upper horizontal portion of the second detector can receive X-rays transmitted through the head of the human body and the nearby body portion
- the horizontal portion of the lower side of the second detector can receive X-rays transmitted through the foot of the human body and the body portion of the vicinity.
- the second detector 313b in Fig. 10 allows reception and detection of attenuated X-rays transmitted through the entire human body, and converts the detected radiation signals into, for example, electrical signals to effect transmission detection.
- an electronically controlled display module 316 may also be included for interacting with the user to control the operation of the composite inspection apparatus and display the results of the inspection, such as input control scanning X-ray generator emission X
- the signal of the ray includes only emitting a pencil-shaped X-ray beam or a fan-shaped X-ray beam, or simultaneously emitting a pencil-shaped X-ray beam and a fan-shaped X-ray beam, performing inspection, and inputting other commands; and displaying the result of the transmission detection for displaying the back Scattering test results, etc.
- the electronically controlled display module 316 includes an electrical module 316a, a data acquisition module 316b, a server 316c, an external interface 316d, and a client terminal 316e.
- the server 16c performs data analysis, processing, and imaging on the detection signal, and transmits it to the client terminal 316e in real time through a wired interface or wireless transmission (such as WIFI).
- the backscatter image and the transmission image may be respectively displayed by using two displays, or Both backscatter and transmission images are displayed simultaneously on one display.
- the conveying device 315 may also be included to perform a uniform translational movement along the inspection channel to complete the whole body backscatter scanning or transmission scanning of the examined human body 314 column by column, and then through the electronic control display module 316. Interact with users.
- the inspection system of the present disclosure is a single channel mode and is not limited by an auxiliary device such as an inorganic casing, a backing plate or a top cover. In the present embodiment, the scanning X-ray generator and the detector remain stationary, and the body to be inspected is moved.
- the conveying device 315 includes a manned skateboard 315a, and the manned sliding plate 315a is designed with an armrest for the inspected person 314 to grasp, thereby eliminating the safety hazard caused by the falling movement.
- the conveyor 15 includes a ball screw and a motor drive 315b that can reciprocate.
- the manned skateboard 315a can be returned in time for the next inspection operation.
- belt transport or other transmission methods can also be used.
- the composite inspection apparatus can include a mobile device that is capable of moving a scanning X-ray generator and detector to perform scanning of a stationary human body.
- the scanning X-ray generator can independently generate a pencil-shaped X-ray beam for backscatter detection and a sector X-ray beam for transmission detection, respectively.
- a conventional X-ray generator has only one X-ray emission source capable of emitting X-rays of an energy.
- the detection channel and the backscatter detection channel because each detection channel can only provide one type of X-ray in the form of energy, which causes inconvenience in detection; however, in the composite inspection device of the present disclosure, the scanning X-ray generator can respectively emit two types. X-rays of energy, one of the low-energy pencil-shaped X-ray beams can be used for scatter detection, and another high-energy fan-shaped X-ray beam can be used for transmission detection, so that only one detection channel can perform both detections.
- the energy of the pencil-shaped X-ray beam and the fan-shaped X-ray beam may be adjusted, the energy of the pencil-shaped X-ray beam may be higher, and the energy of the fan-shaped X-ray beam may be lower.
- the composite inspection apparatus can perform only backscatter detection, for example, only transmitting a pencil-shaped X-ray beam to scan a human body. Since the energy of the pencil-shaped X-ray beam is small, the damage to the human body is small, and the human body can be initially inspected only by back scattering; after performing preliminary inspection on the human body, if further inspection is required, the composite inspection device according to the present disclosure can Transmittance examination is performed on the human body without requiring the human body to move the position.
- the composite inspection apparatus according to the present disclosure is highly integrated, and the safety of the inspection is improved, and the inspection convenience is improved.
- the composite inspection apparatus further includes a composite inspection apparatus collimator 312 that includes a first collimating slit 312' and a second collimating slit 312", the first collimating slit being used a collimating pen-shaped X-ray beam, the second collimating slit is used for collimating the fan-shaped X-ray beam, and the pen-shaped X-ray beam and the fan-shaped X-ray beam are respectively projected onto the human body through the first collimating slit and the second collimating slit, respectively A collimating slit and a second collimating slit are separated by a partition.
- the first collimating slit 312' and the second collimating slit 312" are sized to scan the X-ray emitted by the X-ray generator
- the beam and sector X-ray beam respectively correspond to the first collimating slit 312' and the second collimating slit 312".
- the lateral width (ie, the horizontal direction) of the first collimating slit 312' may be 0.5 mm.
- the opening length in the vertical direction is 1000 mm - 2000 mm, for example, may be 1200 mm; the lateral width of the second collimating slit may be 0.5 mm - 2 mm, for example, may be 1 mm, opening in the vertical direction
- the length is from 1000 mm to 2000 mm, for example 1200 mm.
- a partition between the first collimating slit 312' and the second collimating slit 312" separates the first collimating slit 312' and the second collimating slit 312" such that the pen-shaped X-ray beam passes only the first collimating The slit 312', the fan-shaped X-ray beam passes only through the second collimating slit 312".
- the thickness of the partition may be 5 mm - 15 mm, for example, may be 8 mm, and may be 10 mm.
- the first collimating slit 312' and the second collimating slit 312" are respectively capable of restraining the passed pen-shaped X-ray beam and the fan-shaped X-ray beam, respectively, so that the pen-shaped X-ray beam and the sector X-ray beam respectively have the required requirements of the composite inspection device
- the scanning direction and range reduce the X-ray damage to the surrounding radiation.
- the composite inspection apparatus collimator 312 can also include a regulator 312a having a cross-sectional view, as shown in FIG. 12, configured to limit the height and width of the source collimator outlet.
- the four sides of the opening of the adjuster 312a can be adjusted such that the size of the opening is capable of constraining the fan shaped X-ray beam to the desired range of the composite inspection apparatus. It is advantageous to provide the adjuster 312a to flexibly adjust the illumination range of the radiation beam to reduce damage to the environment.
- the anode shank 3300 can also be configured to connect the positive pole of the high voltage power supply, and in particular, can be directly grounded for the negative high voltage power supply.
- the anode shank 3300 can be part of the anode, in other words, the anode is a unitary piece.
- the anode handle 300 can be a component that is coupled to the anode.
- the anode and anode shank 3300 can be made of copper or a copper alloy. This is advantageous for conducting electricity and reducing electrical resistance; moreover, it is advantageous for heat dissipation; in addition, it has certain X-ray radiation protection capability.
- an inspection method for a human body which performs inspection using the above-described composite inspection apparatus. Since the composite inspection apparatus has a function of emitting an X-ray beam of two energies, the inspection method according to the present embodiment has less damage to the human body when used, and the convenience is improved.
- each of the inspected human bodies may first perform a backscattering detection by using a scanning X-ray generator to emit a pencil-shaped X-ray beam, the pen-shaped X-ray beam energy is small, and the damage to the human body is small, and when no suspicious objects are found, the inspection is completed;
- the scanning X-ray generator is used to emit a fan-shaped X-ray beam to perform transmission detection.
- the fan-shaped X-ray beam can clearly display the items carried by the human body through the human body, thereby improving the reliability of the inspection.
- the human body can perform backscatter detection and transmission detection without moving on the same inspection channel, thereby greatly improving convenience and improving inspection efficiency.
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Abstract
Description
Claims (34)
- 一种组合扫描X射线发生器,包括:外壳;阳极,设置在所述外壳内,阳极包括相对的阳极第一端和阳极第二端,其中第一端和第二端是所述阳极的相对的两端;笔形束辐射源,设置在所述阳极第一端,配置用以发射笔形X射线束,其中,笔形束辐射源包括第一阴极,所述第一阴极配置成在笔形束辐射源内朝向阳极第一端发射电子;扇形束辐射源,设置在所述阳极第二端,配置用以发射扇形X射线束,其中,扇形束辐射源包括第二阴极,所述第二阴极配置成在扇形束辐射源内朝向阳极第二端发射电子;其中,笔形束辐射源和扇形束辐射源能够独立操作。
- 如权利要求1所述的组合扫描X射线发生器,其中阳极设置成阳极第一端和阳极第二端可以相对彼此转动。
- 如权利要求1或2所述的组合扫描X射线发生器,其中,笔形束辐射源包括第一靶,设置在阳极第一端端面,第一靶受到电子轰击后发射X射线;扇形束辐射源包括第二靶,设置在阳极第二端端面,第二靶受到电子轰击后发射X射线;其中,第一端端面与阳极的长度延伸方向不垂直,第二端端面与阳极的长度延伸方向不垂直。
- 如权利要求3所述的组合扫描X射线发生器,配置成使得笔形束辐射源的第一靶和扇形束辐射源的第二靶能够同步地或不同步地发射X射线。
- 如权利要求3所述的组合扫描X射线发生器,其中,组合扫描X射线发生器配置成使得施加在第一阴极和阳极第一端之间的电压等于施加在第二阴极和阳极第二端之间的电压,从而产生的X射线能量相同。
- 如权利要求3所述的组合扫描X射线发生器,其中,组合扫描X射线发生器配置成使得施加在第一阴极和阳极第一端之间的电压不等于施加在第二阴极和阳极第二端之间的电压,从而产生的X射线能量不相 同。
- 如权利要求1或2所述的组合扫描X射线发生器,其中,笔形束辐射源包括防护转筒,配置成将第一靶发射的X射线调制成笔形X射线束;和其中,扇形束辐射源包括准直器,配置成将第二靶发射的X射线调制成扇形X射线束。
- 如权利要求7所述的组合扫描X射线发生器,其中,防护转筒包围阳极第一端,允许电子穿过防护转筒轰击第一靶,并限制第一靶发射的X射线,使得第一靶发射的X射线仅能够从防护转筒出射孔射出,形成笔形X射线束。
- 如权利要求7所述的组合扫描X射线发生器,其中,笔形束辐射源还包括设置在所述阳极上靠近阳极第一端的电枢铁芯和围绕在电枢铁芯上的电枢绕组,以及对应电枢铁芯设置在防护转筒内壁上的多个永磁体,以便在电枢绕组形成变化的磁场时电枢绕组与多个永磁体相互作用而驱动防护转筒围绕所述阳极第一端转动。
- 如权利要求7所述的组合扫描X射线发生器,其中,准直器包围阳极第二端,允许电子穿过准直器轰击第二靶,并限制第二靶发射的X射线,使得第二靶发射的X射线仅能够从准直器出口射出,形成扇形X射线束。
- 如权利要求7所述的组合扫描X射线发生器,其中,防护转筒出射孔射出的笔形X射线束和准直器出口射出的扇形X射线束分别位于两个平行的平面内。
- 如权利要求7所述的组合扫描X射线发生器,其中,在沿阳极长度方向上看,防护转筒出射孔射出的笔形X射线束的扫描覆盖范围和准直器出口射出的扇形X射线束的覆盖范围不重叠、部分重叠或完全重合。
- 如权利要求7所述的组合扫描X射线发生器,其中,防护转筒出射孔射出的笔形X射线束的扫描范围的张角与准直器出口射出的扇形X射线束的张角相同或不相同。
- 如权利要求1或2所述的组合扫描X射线发生器,其中,所述阳 极包括阳极柄,所述阳极柄与所述外壳连接用于将所述阳极固定在所述外壳内部。
- 如权利要求14所述的组合扫描X射线发生器,其中,所述阳极柄包括冷却通道,配置成用以流过冷却介质。
- 一种复合检查设备,包括多个检查通道和至少一台如权利要求1~15中任一项所述的组合扫描X射线发生器,其中,每一台组合扫描X射线发生器被构造成发出一个笔形X射线束和一个扇形X射线束,所述笔形X射线束适用于对一个检查通道内的待检目标进行背散射扫描,所述扇形X射线束适用于对另一个检查通道内的待检目标进行透射扫描。
- 根据权利要求16所述的复合检查设备,其中,所述复合检查设备包括两个检查通道和一台组如权利要求1~15中任一项所述的合扫描X射线发生器,并且所述组合扫描X射线发生器设置在所述两个检查通道之间,向一个检查通道内的待检目标发射所述笔形X射线束,并向另一个检查通道内的待检目标发射所述扇形X射线束。
- 根据权利要求16所述的复合检查设备,其中,每一台组合扫描X射线发生器被构造成发出一个笔形X射线束和一个扇形X射线束,使得所述背散射扫描和所述透射扫描相互独立地进行并且互无串扰;其中,所述背散射扫描和所述透射扫描同时进行或者不同时进行。
- 根据权利要求16所述的复合检查设备,其中,所述多个检查通道位于同一个水平面上。
- 根据权利要求16所述的复合检查设备,其中,所述复合检查设备还包括背散探测器和透射探测器,所述组合式X射线发生器和所述背散探测器位于所述一个检查通道内的待检目标的同一侧,并且所述组合扫描X射线发生器和所述透射探测器分居所述另一个检查通道内的待检目标的两侧,所述透射探测器被设置为]形或L形。
- 根据权利要求16所述的复合检查设备,其中,所述复合检查设备是开放式的或封闭式的。
- 一种复合检查设备,包括第一检查通道、第二检查通道、设置在所述第一检查通道与所述第二检查通道之间的一个如权利要求1~15中任一项所述的组合扫描X射线发生器、以及对应的探测器,其中,所述X射线发生器被构造成发出笔形X射线束,所述笔形X射线束适用于对所述第一检查通道内的待检目标进行背散射扫描并且被构造成发出扇形X射线束,所述扇形X射线束适用于对所述第二检查通道内的待检目标进行透射扫描。
- 一种利用如权利要求16至22中的任何一项所述的复合检查设备的用于待检目标的检查方法,所述方法包括:使第一待检目标从一个检查通道中穿过,以利用所述笔形X射线束对所述第一待检目标进行背散射扫描;以及使第二待检目标从另一个检查通道中穿过,以利用所述扇形X射线束对所述第二待检目标进行透射扫描。
- 一种用于人体的复合检查设备,包括:如权利要求1~15中任一项所述的扫描X射线发生器,配置成能够分别独立地产生用于背散射检测的笔形X射线束和用于透射检测的扇形X射线束,其中笔形X射线束能够扫描一扇形区域,扇形X射线束具有扇形轮廓覆盖一扇形区域;用于探测被人体散射的笔形X射线束的第一探测器;和用于探测透射通过人体的扇形X射线束的第二探测器;其中在第一探测器和第二探测器之间限定用于被检查人体的检查通道。
- 根据权利要求24所述的复合检查设备,其中第一探测器设置在检查通道和扫描X射线发生器之间面对人体以便接收从人体散射回的X射线;第一探测器包括狭缝以便笔形X射线束和扇形X射线束通过第一探测器投射到人体。
- 根据权利要求24所述的复合检查设备,其中第二探测器设置在检查通道的远离扫描X射线发生器的一侧用以接收透过人体的X射线;第二探测器呈C或[形,包括第二探测器竖直部分、接续第二探测器竖直部分的第二探测器上侧水平部分和接续第二探测器竖直部分的第二探测器下侧水平部分。
- 如权利要求25所述的复合检查设备,还包括复合检查设备准直器,配置成包括第一准直缝和第二准直缝,第一准直缝用于准直笔形X射线束,第二准直缝用于准直扇形X射线束,笔形X射线束和扇形X射线束分别穿过第一准直缝和第二准直缝投射到人体上,第一准直缝和第二准直缝通过隔板隔开。
- 如权利要求27所述的复合检查设备,其中,复合检查设备准直器包括调节器,配置成限制源准直器出口的高度和宽度;并且,调节器的开口的四边能够调节使得开口的尺寸能够将扇形X射线束约束到复合检查设备所需的范围。
- 如权利要求24所述的复合检查设备,还包括电控显示模块,用于与用户交互信息,以便控制复合检查设备的操作和显示检查的结果。
- 如权利要求16、22、24中的任何一项所述的复合检查设备,还包括传送装置,沿着检查通道做匀速平移运动,以便被检人体的全身被逐列背散射扫描或者透射扫描。
- 一种用于人体的检查方法,包括使用如权利要求16、22、24中的任何一项所述的复合检查设备执行人体检查其中,所述检查方法包括:使用扫描X射线发生器发射笔形X射线束执行背散射检测;以及如果需要,使用扫描X射线发生器发射扇形X射线束再次对人体执行透射检测。
- 一种利用如权利要求16、22、24中的任何一项所述的复合检查设备对待检目标进行检查的方法,所述方法包括:在完成了对待检目标的背散射扫描之后,再对所述待检目标进行透射扫描;或者在完成了对待检目标的透射扫描之后,再对所述待检目标进行背散 射扫描。
- 根据权利要求32所述的方法,其中,在对待检目标进行背散射扫描或透射扫描的过程中,所述待检目标相对于所述复合检查设备移动,或者所述复合检查设备相对于所述待检目标移动。
- 根据权利要求32所述的方法,其中,将两台或更多台复合检查设备级联起来或者组合起来使用,使得待检目标一次通过所述复合检查设备而无需返回或者翻转即可完成检查。
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CN201810447687.1A CN108318512A (zh) | 2018-05-10 | 2018-05-10 | 用于人体的透射-背散射组合检测设备和检测方法 |
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