WO2012106730A2 - Système de balayage à rayons x bimodal - Google Patents

Système de balayage à rayons x bimodal Download PDF

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Publication number
WO2012106730A2
WO2012106730A2 PCT/US2012/024182 US2012024182W WO2012106730A2 WO 2012106730 A2 WO2012106730 A2 WO 2012106730A2 US 2012024182 W US2012024182 W US 2012024182W WO 2012106730 A2 WO2012106730 A2 WO 2012106730A2
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WO
WIPO (PCT)
Prior art keywords
ray
dose rate
vehicle
inspection system
collimator
Prior art date
Application number
PCT/US2012/024182
Other languages
English (en)
Other versions
WO2012106730A8 (fr
WO2012106730A3 (fr
Inventor
Edward James Morton
Original Assignee
Rapiscan Systems, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rapiscan Systems, Inc. filed Critical Rapiscan Systems, Inc.
Priority to EP12741739.2A priority Critical patent/EP2673622B1/fr
Priority to GB1315294.7A priority patent/GB2502732B/en
Priority to PL12741739T priority patent/PL2673622T3/pl
Publication of WO2012106730A2 publication Critical patent/WO2012106730A2/fr
Publication of WO2012106730A8 publication Critical patent/WO2012106730A8/fr
Publication of WO2012106730A3 publication Critical patent/WO2012106730A3/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
    • G01N23/083—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays
    • G01N23/087—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays using polyenergetic X-rays
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
    • G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
    • G01V5/224—Multiple energy techniques using one type of radiation, e.g. X-rays of different energies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
    • G01N23/083—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
    • G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
    • G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
    • G01V5/234—Measuring induced radiation, e.g. thermal neutron activation analysis

Definitions

  • This application relates generally to security systems for screening threats and contraband contained on vehicles, and more specifically, to a dual mode X-ray transmission system that can be operated in low or high dose rate modes depending upon the area or portion of the vehicle to be screened by use of a novel collimator.
  • Scanning systems are also known in which the driver remains in the vehicle during the scan.
  • the driver drives through the X-ray system and the high energy X-ray beam is only turned on after the driver and the cab of the vehicle have passed through the inspection zone so that only the cargo is inspected.
  • X-ray installations of this type are commonly known as portal systems.
  • Dual source approaches have also been known wherein a low-dose, low-energy X-ray source is used to scan the cab and driver when they are in the inspection zone while a high energy source is switched on when the cab has passed and the cargo is in the inspection zone.
  • This approach works well in situations where the high energy X-ray source is in the range 2 MV and above.
  • this dual source approach can be too expensive to allow practical implementation.
  • the present application is directed towards an X-ray inspection system with variable energy dose rate for screening vehicles
  • an X-ray inspection system with variable energy dose rate for screening vehicles comprising an X-ray source for generating an X-ray beam, at least one detector array to receive the X-ray beam signals transmitted through the inspected vehicle, and a collimator that modulates the intensity of X-ray beam to produce low or high X-ray energy dose rate depending upon the portion of the vehicle being screened.
  • the collimator comprises an insert located within an opening defined by a first block and a second block, wherein said insert is rotated to vary the delivered dose rate.
  • the X-ray inspection system further comprises an electrical control system for rotating said collimator insert at the appropriate time based on input from a plurality of sensors.
  • the variation in dose rate is proportional to the rotation angle of the collimator insert.
  • the collimator insert is rotated by a fixed angle to achieve a defined variation in dose rate.
  • the fixed and defined incremental rotation is achieved using the Geneva mechanism.
  • the sensors in the X-ray inspection system comprise a combination of three scanning laser sensor systems to track the inspected vehicle.
  • the entire vehicle is scanned at low dose rate if no cargo is detected.
  • a timing of said switching is determined by what portion of the vehicle is being exposed to said scanning region.
  • the collimator comprises a first portion and a second portion and the moveable component is an insert located within an opening defined by said first portion and said second portion.
  • the moveable component is rotated to switch between said low energy and high energy dose rates.
  • the low energy X-ray dose rate is in the range of 10% to 0.1% of the high energy X-ray dose rate.
  • FIG. 2 is a diagram of the data acquisition circuit of a detector used within the system of
  • FIG. l
  • FIG. 4a is a schematic view of the system of FIG.1 in use
  • FIG. 4b is a schematic view of the system of FIG.1 in use
  • FIG. 5 shows a number of driver instruction signals used in the system of FIG.1 ;
  • FIG. 6 is a schematic plan view of the system of FIG.1 ;
  • FIG. 7 is a schematic view of an infra-red sensor system of a further embodiment of the invention.
  • FIG. 8 is a diagram of the detector circuit associated with each of the sensors of the sensor system of FIG. 7;
  • FIG. 9 is a schematic front view of the sensor system of FIG. 7 in operation.
  • FIG. 10a is a block diagram illustrating one embodiment of the X-ray transmission vehicle screening system of the present specification, having a collimator operating in a high dose rate mode;
  • FIG. 10b is a block diagram illustrating another embodiment of the X-ray transmission vehicle screening system of the present specification, having a collimator operating in a low dose rate mode;
  • FIG. 1 la is a diagram illustrating the collimator in the present specification operating in a high dose rate mode
  • FIG. 1 lb shows the collimator of FIG. 1 la operating in a low dose rate mode
  • FIG. 12a is a graph showing an X-ray spectrum typically emitted from an X-ray linear accelerator with equivalent operating energy of 1MV;
  • FIG. 12b is a graph showing a filtered spectrum having a mean higher energy with lower intensity
  • FIG. 13 illustrates an exemplary mechanism for rotating a collimator insert to switch the collimator of the present invention between low and high dose rate operating modes
  • FIG. 14 depicts a three-point mechanism for enabling the collimator of the present invention to be positioned accurately with respect to both the X-ray source and the X-ray detector arrays;
  • FIG. 15 is an illustration of an exemplary collimator insert rotation mechanism
  • FIG. 16a is an illustration of a cargo vehicle passing through a scanning region/facility
  • FIG. 16b depicts a time domain diagram of the height of the vehicle under inspection as it passes through the scanning region/facility
  • FIG. 16c illustrates a time domain diagram depicting switching between low dose rate to high dose rate mode of operation depending upon whether the cab portion or the cargo portion of the inspected vehicle is to be scanned;
  • FIG. 16d illustrates the points in time when the X-ray source is switched on and off
  • FIG. 17a shows a scanning laser range finder inclined at an angle planar to the surface of the road
  • FIG. 17b shows a scanning laser oriented perpendicular to the direction of motion of the inspected vehicle in a vertical plane perpendicular to the road surface
  • FIG. 17c shows a scanning laser oriented in a vertical plane projecting towards the side of the inspected vehicle.
  • a typical dose rate output from a linear accelerator is in the range 10 to 50 Gy/hr at lm.
  • the dose delivered to a driver at 3 m from the X-ray source can be calculated to be in the range 300 to 1500 ⁇ . This dose per scan is not generally acceptable.
  • a detector system 14 comprises a plurality of detectors 16 arranged to detect X-rays from both of the sources 10, 12.
  • the detectors 16 are arranged around a scanning volume 18, in a vertical array 20 which extends down one side of the scanning volume 18, on the opposite side of it to the sources 10, 12, and horizontal array 22 which extends over the top of the scanning volume.
  • the sources 10, 12 are located close to each other and both in the same plane as the detector arrays.
  • Each of the sources 10, 12 is arranged to generate X-rays in a fan beam in the common plane.
  • the dose rate at the output of a low voltage X-ray generator 12 is substantially less than that from a linear accelerator 10.
  • the scan of a vehicle including a driver's cab and a cargo container is started using the low energy X-ray source 12 only.
  • image data is collected as the driver's cab passes through the X-ray beam.
  • the high energy X-ray linear accelerator 10 is switched on and the low energy X-ray source 12 is turned off.
  • the main cargo load would be inspected with the full intensity high voltage X-ray beam from the linear accelerator 10 to provide a high level of inspection.
  • the driver will normally be sitting within the cab of a vehicle, and this cab will afford the driver some additional protection which will drop the driver dose further still.
  • An X-ray beam at 160 kVp beam quality will be able to penetrate through the driver and 10-20 mm of steel so providing inspection capability of many parts of the drivers cab including the tyres, door panels and roof although little inspection capability would be provided in the main engine compartment.
  • the detector elements in the detectors 16 in a cargo screening system will typically be tuned such that their full scale matches the peak intensity that can be delivered from the X-ray linear accelerator 10.
  • This detector elements are further designed to achieve a dynamic range on the order of 100,000 (i.e. a noise level of around 10 parts per million of full scale range).
  • the output from the conventional X-ray generator 12 will be equivalent to approximately 0.05% to 0.3%> of full scale depending on how the detectors 16 are tuned.
  • the signal i.e. X-ray intensity
  • the scanning system further comprises a data acquisition system that is capable of acquiring and merging the two sets of X-ray image data from the detectors 16, generated by X-rays from the two sources 10, 12 respectively.
  • a preamplifier/integrator circuit 30 for each detector 16, a preamplifier/integrator circuit 30 is provided with two independent integrator circuits; side A and side B, connected in parallel between the sensor 16 and an analogue-to- digital converter (ADC) 32. Each integrator feeds into the shared ADC 32 through a simple multiplexor.
  • ADC analogue-to- digital converter
  • Each preamplifier/integrator circuit 30 comprises an amplifier 34 in parallel with a capacitor 36 and a re-set switch 38.
  • the input to the amplifier is connected to the sensor 16 by an integrate switch 40 and the output from the amplifier is connected to the ADC by a digitize switch 42.
  • Each of the switches can be closed by a control signal from a controller 44. Closing the integrate switch starts the circuit integrating the signal from the sensor, increasing the charge on the capacitor 36, and opening it stops the integration. Closing the digitizing switch connects the capacitor 38 to the ADC which converts the stored voltage to a digital output signal. The capacitor can then be discharged by closing the re-set switch 38 before the next integration.
  • the integration time on side A when the control signal Ai nt from the controller 40 is high, is short, while the integration time on side B, when the control signal B; nt from the controller 40 is high, is long.
  • the integration time corresponds with the time that the appropriate source 10, 12 is turned on, also under control of the controller 40, the source being turned on at the beginning of the associated integration time and turned off at the end of the associated integration time.
  • the sources 10, 12 are therefore turned on alternately. As can be seen from FIG. 3, this means that the low energy source 10 is turned on for relatively long periods, and turned off for shorter periods, and the high energy source 10 is only turned on for the short periods while the low energy source is off.
  • the cycle time is typically on the order of 10 ms with an A side integration time typically of 10 and a B side integration time of 9.990ms.
  • the digitizing switch 42 is closed, by a short pulse in the appropriate control signal Adigitize or Bdigitize from the controller 40, to digitize the integrated signal at the end of the integration time over which integration has taken place.
  • the primary signal When imaging with the low energy X-ray source 12, the primary signal is read out using the B side digitised data. When imaging with the linear accelerator source 10, the primary signal is read out using the A side digitised data. It will be appreciated that the timing described above allows the two sources to be used alternately to form alternate two-dimensional image slices, or one of the sources to be turned off so that just one of the sources is used to generate a series of two-dimensional image slices.
  • the low energy X-ray generator 12 when imaging with the high energy X-ray source 10, the low energy X-ray generator 12 is turned off. However the B- side digitised data is used to collect pulse-by-pulse dark offset data which is time and position correlated with the image data from A side and subtracted as dark noise from the imaging signal to provide correction of the imaging signal to correct for the dark noise.
  • the X-ray sources 16 and multi-element detector arrays 20, 22 are located within a fixed housing 50 which is firmly attached to the ground and forms an arch over the scanning volume.
  • the system further comprises a traffic control system which includes a signalling system 52, including traffic lights 54, and a signal display 56, arranged to provide signals to the driver of the vehicle to regulate the speed and/or timing of driving the vehicle through the scanner.
  • the traffic control system further comprises one or more speed detectors, in this case a radar gun 58, arranged to measure the speed of the vehicle.
  • the traffic control system further comprises a first camera 60 on one side of the scanner and a second camera 62 on the other side of the scanner. As shown in FIG.
  • the driver drives the vehicle including the truck 70 and cargo load 72 through the detection system, following speed indications that are provided via the traffic light system.
  • the truck 70 and cargo load 72 pass through the X-ray beam between the X-ray sources 10, 12 and the detector arrays 20, 22.
  • the radar speed gun 58 is arranged to continuously monitor the speed of the vehicle, including the load 72 and to feed back to a control unit which controls the visual display 56, mounted by the roadside, which advantageously can be arranged to provide a number of display signals as shown in FIG. 5.
  • a horizontal arrow 80 is lit in a green colour when the driver is at the optimal speed, i.e. within a predetermined speed range.
  • a downwards pointing orange coloured arrow 82 will be displayed.
  • the traffic lights 54 are arranged to control the movement of each vehicle to be inspected through the scanner.
  • the use of such traffic control measures substantially reduces the human effort required to co-ordinate scanning of cargo loads. This is advantageous in reducing cost of operation as well as in reducing employee radiation dose exposure.
  • the vertical viewing cameras 64, 66 Prior to the vehicle entering the image inspection area, all X-ray sources 10, 12 are normally be switched off. As the vehicle enters the image inspection area, the vertical viewing cameras 64, 66 are used to monitor the exact position of the vehicle and to control turn on of the low energy X-ray beam when the front of the vehicle is around 10 cm from the vertical imaging plane. It is prudent to utilise one or more secondary sensors, such as an infra-red light beam to validate the position of the vehicle with respect to the imaging plane. The vertical viewing cameras 64, 66 continue to monitor the position of the vehicle as it moves through the scanning plane, seeking to determine when the trailing edge of the driver's cab 70 has passed through the X-ray beam.
  • the vertical viewing cameras 64, 66 continue to monitor the position of the vehicle as it moves through the scanning plane, seeking to determine when the trailing edge of the driver's cab 70 has passed through the X-ray beam.
  • the control circuit 82 is arranged to address each light source 80 in turn to turn it on, and the activated light source is pulsed by a clock pulse at a frequency of typically 10 kHz. Each light source is turned on for typically 1 ms at a time. In an array with 20 light sources, it is then possible to scan the system every 20 ms, or equivalently at a 50 Hz repetition rate.
  • a series of infra-red sensitive photodiodes 84 are arranged into a vertical linear array on the opposite side of the path of the vehicle to the LEDs, each with their own high speed amplifier.
  • the output of each amplifier 86 is passed through a band-pass filter 88 that is tuned to the excitation frequency of the associated light emitting diodes 80, for example 10 kHz.
  • the output from this filter 88 is a switching potential which can be passed into a low pass filter 90 (with a bandwidth of around 1kHz) which acts to integrate the high frequency switching signal.
  • the output of the low pass filter 90 is then input into a comparator 92 to compare it with a fixed threshold to give a simple binary decision as to whether the receiver 84 is illuminated or not. This binary value for all of the detectors 84 is multiplexed out to a single data line 94 for onwards processing.
  • Each emitting light emitting diode 80 is arranged to generate a fan beam of infra-red radiation in a vertical plane so that it will illuminate multiple receivers 84. It is possible to determine the height, and to some extent the profile, of any object in the plane of the beam as shown in FIG. 9 by determining the lowest illuminated light receiver 84 during activation of each of the light sources 80 in turn.
  • the data on the output 94 from the light curtain is input to the processor 44 by means of which it is processed and coupled with that from the video data in order to establish when the trailing edge of the cab 70 has passed through the inspection plane and the leading edge of the load 72 has arrived.
  • the X-ray data itself is analysed by the controller 44 and interpreted as it is collected on a pulse by pulse basis to determine when the trailing edge of the drivers cab 70 has passed through the scanner and when the leading edge of the cargo load 72 enters the imaging plane of the scanner.
  • this modification there are now three types of information that indicate independently, and should all correlate to confirm, the passing of the trailing end of the driver's cab 70 and the start of the cargo load 72: (1) video data, (2) infra-red light curtain data, and (3) X-ray image data. These redundant signals are sufficient to build a safety case for the operation of a driver controlled cargo inspection system.
  • the present application discloses a security system for screening threats and contraband contained on vehicles, and more specifically, a variable mode X-ray transmission system that can be operated in low or high dose rate modes depending upon the area or portion of the vehicle to be screened.
  • the systems disclosed herein achieve variable mode operation of the X-ray transmission system by use of a novel collimator.
  • the X-ray transmission vehicle inspection system enables the scanning of the cab portion (occupied by people, such as a driver) at low dose rate safe for human beings while allowing scanning of the cargo portion (unoccupied by people) at high dose rate. Further, rapid switching from low dose rate to high dose rate operating mode is provided, while striking a balance between high materials penetration for cargo portion and low intensity exposure safe for occupants in the cab portion of the inspected vehicle.
  • the data collection module 1025 comprises at least a detector array, a signal conversion circuit, a data processing circuit and a logic control circuit.
  • the detector array is used to receive the X-ray beam signals transmitting through the inspected vehicle, the received X-ray beam signals are converted into transmission data via the signal conversion circuit, and the transmission data from the signal conversion circuit are combined into projection data by the data processing circuit. Furthermore, synchronous performance of the detector array receiving X- ray beam signals and the data processing circuit transmitting the projection data is controlled by the logic control circuit.
  • the data collection module 1025 combines the received transmission data into projection data to display resulting radiographic image of the contents of the vehicle 1020 on a monitor, such as an LCD screen for observing by an operator/inspector.
  • FIG. 13 illustrates an exemplary mechanism for rotating the collimator insert to switch the collimator between low and high dose rate operating modes.
  • an electric motor 1305 drives a worm gear mechanism 1306 with a cog fixed to the base of the collimator insert 1313.
  • the collimator insert 1313 is also turned, with the ratio between motor rotation and collimator rotation being governed by the ratio of the worm gear - cog mechanism.
  • the insert 1313 is supported by bearings 1315 at the top and bottom with one or more sensors being used to determine the collimator angle 1320.
  • the insert 1313 and its associated mechanism are connected to one of the two collimator blocks.
  • FIG. 17c shows a scanning laser 1707 oriented in a vertical plane projecting towards the side of the vehicle 1715.
  • This laser 1707 is also used to detect the start of the cab 1716, the end of the cab, the start of cargo 1717 and the end of the cargo.
  • By combining the signals from laser orientations of FIGS. 17a, 17b and 17c it is possible to avoid unexpected high dose rate exposure of the cab 1716 due to the presence of, for example, a sun roof in the cab.
  • This configuration also enables correct exposure of vehicles with overhanging cargo, such as an ore truck.
  • Alternate sensors, such as IR light curtains, inductive sensors or any other sensors advantageously evident to those of ordinary skill in the art may be used either in place of or in parallel with the sensors described with reference to FIGS. 17a through 17c.

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Abstract

L'invention porte sur un système d'émission de rayons X, à mode variable, qui peut fonctionner dans des modes à débit de dose faible ou élevé, en fonction de la zone ou de la partie du véhicule à examiner. Dans un mode de réalisation, un débit de dose variable est obtenu par l'utilisation d'un nouveau collimateur. Les systèmes selon l'invention permettent le balayage d'une partie de cabine de véhicule (occupée par des personnes, telles qu'un conducteur) à un faible débit de dose, qui est sans danger pour des êtres humains, tout en permettant le balayage de la partie de chargement (inoccupée par des personnes) à un débit de dose élevé. Une commutation rapide entre les modes de fonctionnement à faible débit de dose et à débit de dose élevé est fournie, tout en produisant un équilibre entre une pénétration de matériau élevée pour la partie de chargement et une exposition de faible intensité qui est sans danger pour des occupants dans la partie de cabine du véhicule inspecté.
PCT/US2012/024182 2011-01-31 2012-02-07 Système de balayage à rayons x bimodal WO2012106730A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP12741739.2A EP2673622B1 (fr) 2011-02-08 2012-02-07 Système de balayage à rayons x bimodal
GB1315294.7A GB2502732B (en) 2011-01-31 2012-02-07 Dual mode X-ray vehicle scanning system
PL12741739T PL2673622T3 (pl) 2011-02-08 2012-02-07 Rentgenowski system skanujący o dwóch trybach działania

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US91948211A 2011-01-31 2011-01-31
US12/919,482 2011-01-31
US201161440835P 2011-02-08 2011-02-08
US61/440,835 2011-02-08

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WO2012106730A2 true WO2012106730A2 (fr) 2012-08-09
WO2012106730A8 WO2012106730A8 (fr) 2012-10-18
WO2012106730A3 WO2012106730A3 (fr) 2012-12-06

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Cited By (15)

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WO2014107493A1 (fr) * 2013-01-04 2014-07-10 American Science And Engineering, Inc. Réduction dynamique de doses dans le contrôle radiographique par rayons x
CN103926261A (zh) * 2013-11-14 2014-07-16 清华大学 多能量多剂量加速器、具有该加速器的快检系统及对应的快检方法
WO2014078808A3 (fr) * 2012-11-16 2015-07-16 Neurologica Corp. Système d'imagerie par tomodensitométrie (tdm) doté d'un collimateur rotatif multifentes
WO2015143971A1 (fr) * 2014-03-24 2015-10-01 北京君和信达科技有限公司 Système et procédé pour inspection de radiation sur un objet mobile
WO2015172464A1 (fr) * 2014-05-15 2015-11-19 北京君和信达科技有限公司 Système et procédé d'inspection par rayonnement de cible mobile de type à passage rapide et à double mode
EP2988151A3 (fr) * 2014-08-22 2016-05-25 Tsinghua University Système d'inspection de véhicule
EP2988150A3 (fr) * 2014-08-22 2016-05-25 Tsinghua University Système d'inspection de véhicule
GB2543753A (en) * 2015-10-21 2017-05-03 Smiths Heimann Sas Vehicle cabin inspection system and method
EP3176605A1 (fr) * 2015-12-04 2017-06-07 Nuctech Company Limited Procédé et dispositif de surveillance d'état d'objet en mouvement et système de véhicule d'inspection rapide
CN107032050A (zh) * 2017-04-20 2017-08-11 北京华力兴科技发展有限责任公司 车辆输送装置及车辆辐射扫描检查系统
CN109471187A (zh) * 2019-01-04 2019-03-15 清华大学 扫描检查系统和扫描检查方法
WO2019062159A1 (fr) * 2017-09-26 2019-04-04 同方威视技术股份有限公司 Système d'inspection de sécurité de véhicule, procédé et contrôleur
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GB2502732A (en) 2013-12-04

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