Nuctech Company Limited

Tsinghua University

Cints Co., Ltd.

Yunda Sun

Li Ni Zhang

Zhiqiang Chen

Qingping Huang

Xin Jin

Le Shen

Shuo Wang

Zhi Tang

Ziran Zhao

Jianping Gu

Li Zhang

Qiang Li

Hu Tang

Ming Hu

Yuxiang Xing

Ming Chang

Ji Zhao

Qitian Miao

Xiaofei Xu

Jie Xia

Zhenhua Zhao

Yuanjing Li

Dong Li

Ming Jin Chen

Liang Li

Tao Yang

Yan Zhang

Huaping Tang

Xuewu Wang

Yumin Yi

Hui Ding

Mingzhi Hong

Jinning Liang

Lei Lei

Ming Huang

Wuyang Liang

Lian Wang

Gang Peng

Tianyi Yang Dai

Gang Fu

Tiao Zhao

Qianlu Ren

Ming Chen

Xinbin Li

Zhisheng Dai

Wubin Wu

Provided is a method of verifying an authenticity of declaration information. The method includes: acquiring a machine-detected radiation image obtained by scanning a container loaded with an article; acquiring a declaration information for declaring the article in the container; performing an identification on an image information of the article in the machine-detected radiation image to obtain an image feature corresponding to the machine-detected radiation image; performing an identification on a text information of the article in the declaration information to obtain a text feature corresponding to the declaration information; screening a declaration category of the article in the container by taking the image feature as an input information and the text feature as an external introduction feature; and determining that the declaration information is in doubt when a declaration category of at least one article in the container does not belong to a declaration category in the declaration information.

Method and system of verifying authenticity of declaration information, device and medium

The method includes: receiving an encoder signal and a ray machine output beam signal, and initially synchronizing the encoder signal and the ray machine output beam signal; recording coded value M of the encoder at moment t, and coded value N of the encoder at moment t, where M, N, and m are integers; determining that duration from the moment tto the moment tis an actual output beam time interval T of the ray machine, when it is determined that a difference value between the coded value M and the coded value N satisfies preset value a, a being an integer; determining gap time Tin the actual output beam time interval T based on a preset output beam time interval Tof the imaging system and the actual output beam time interval T; and controlling the ray machine not to emit beam within the gap time T.

Method and device for controlling output beam of ray machine in imaging system, and CT imaging system

A multi-channel static CT device is provided, and the multi-channel static CT device includes: a scanning channel including a plurality of scanning sub-channels; a distributed X-ray source including a plurality of ray emission points arranged around the scanning channel; and a detector module including a plurality of detectors arranged around the scanning channel, wherein the plurality of detectors are arranged corresponding to the plurality of ray emission points.

Multi-channel static CT device

The present application discloses a CT system and a detection apparatus for the CT system. The detection apparatus includes: a high-energy detector assembly including a plurality of rows of high-energy detectors arranged along a predetermined trajectory; a low-energy detector assembly including a plurality of rows of low-energy detectors arranged at intervals along the predetermined trajectory, the low-energy detector assembly and the high-energy detector assembly being disposed in a stack; a number of rows of the low-energy detectors is smaller than a number or rows of the high-energy detectors; and each row of the low-energy detectors covers a row of high-energy detectors.

CT system and detection device for CT system

Disclosed are calibration assembly and calibration method of calibrating geometric parameters of a CT apparatus. The calibration assembly includes at least one calibration unit each including a plurality of calibration wires, and the plurality of calibration wires are arranged regularly in a same plane. The calibration assembly is easy to be processed and can be used to calibrate geometric parameters of a CT apparatus, and the calibration operations are simple and easy to be implemented.

Calibration assembly and method for calibrating geometric parameters of CT apparatus

The present application discloses an X-ray detection system and method. The detection system includes: a beam source generator, first detectors, a second detector, a collimating device and a processor. The first detectors and the second detector are alternately arranged in a transmission direction of an object to be detected. The beam source generator emits a plurality of columns of beam signals, wherein each column of beam signals comprises a plurality of beam signals; the first detectors receive a plurality of columns of transmitted beam signals passing through the object; the collimating device performs a specificity selection from a plurality of columns of scattered beam signals passing through the object; the second detector receives scattered beam signals selected by the collimating device; and the processor determines a detection result of the object according to the plurality of columns of transmitted beam signals and the selected scattered beam signals.

X-ray detection system and method

The present disclosure relates to a security check system and method. The present disclosure provides a security check system for identifying objects of interest from multiple objects, comprising: an object-of-interest determining device for determining whether an object is an object of interest; an image mark applying device for acquiring images related to selected objects among the multiple objects and recording image marks of the selected objects; and a mark detecting device for detecting the image marks, wherein the security check system is configured to identify whether the object is the object of interest based on the detection of the mark detecting device and outputs a warning accordingly.

Security check system and method

The disclosure provides a scanning imaging system for security inspection of an object and an imaging method thereof, the system comprising: a conveying unit configured for bringing the object to move along a conveying direction; a plurality of radiographic sources at one side of the conveying unit, being arranged successively in a direction vertical to a plane, in which the conveying unit is located, and configured for alternately emitting ray beams to form a scanning area; a linear detector array at the other side of the conveying unit, being configured for detecting first projection images, which are formed after the ray beams emitted by the plurality of radiographic sources penetrate through the object, in the process of the object passing through the scanning area; an imaging unit configured for obtaining a first reconstructed image of the object based on the first projection images of the plurality of radiographic sources.

Scanning imaging system for security inspection of an object and imaging method thereof

The present disclosure discloses an inspection system for quarantine and a method thereof. The CT technology is applied to the field of quarantine supervision, overcoming a problem of objects in an image of a single-view or a multi-view X-ray machine being overlapped, as well as a problem of organics including contrabands in a conventional CT image being not highlighted, not elaborated, and having bad contrast. Accuracy and efficiency of inspecting an object by human operator for quarantine inspection can be considerably improved, which is of a high application value.

Inspection systems for quarantine and methods thereof

An inspection device for quarantine that includes a dual-energy CT apparatus capable of distinguishing substances, a DR apparatus, a substance identification system capable of enhancing display of an object (plant, animal, meat, etc.) focused for quarantine and automatically so labeling, and an image processing system capable of highlighting a suspect of quarantine and providing a corresponding automatic alarm. Compared to the prior art, the present disclosure can highlight a focused object for quarantine, which may improve accuracy and efficiency of inspection for quarantine at a port.

Inspection devices for quarantine

The present disclosure discloses a radiography system including: a ray source, comprising a plurality of X-ray generators which are distributed on one or more planes intersected with a moving direction of an object being inspected; a detector module comprising a plurality of detection units; a data collection circuit; a controller, configured to control at least two X-ray generators of the plurality of X-ray generators in the ray source to generate X-rays alternately such that the object is scanned by the generated X-rays; and control the detector module and the data collection circuit to respectively obtain detection data corresponding to the at least two X-ray generators; and a data processing computer, configured to create images of the object being inspected in view angles of the at least two X-ray generators based on the detection data. The above embodiments may implement a multi-view-angle perspective imaging system within a single scan plane by utilizing a distributed X-ray source and reuse of the detectors.

Radiography systems based on distributed ray source

The present disclosure provides a method and device for operating a CT-based three-dimensional image used for security inspection. The method includes: providing a CT-based three-dimensional image used for security inspection; accepting a selection of an image of an object in the three-dimensional image; and responding to the selection. The present disclosure has strong practicality, and can provide effective reference information for image judgment in the CT-based security inspection field.

Method and device for operating CT-based three-dimensional image used for security inspection

The present disclosure relates to multi-modality detection systems and methods. One illustrative multi-modality detection system may include a distributed radiation source configured to irradiate an object under detection, a primary collimator configured to separate rays of the distributed radiation source into two parts, wherein one part is for CT detection and the other part is for XRD detection, a CT detection device configured to perform a CT detection to acquire a CT image of the object under detection, and an XRD detection device configured to perform an XRD detection to acquire an XRD image of the object under detection, wherein the CT detection and the XRD detection are performed simultaneously.

Multi-modality detection system and method

Disclosed is a method for positioning a target in a three-dimensional CT image and a CT system for security inspection. The method includes: displaying a three-dimensional CT image; receiving a selection by a user of at least one area of the three-dimensional CT image at a viewing angle; generating at least one set of three-dimensional objects in a depth direction based on the selection; and determining a target object from the set. With the above technical solutions, the user may be facilitated in marking a suspected object in a CT image in a quick manner.

Methods for positioning a target in a three-dimensional CT image and CT systems for security inspection

A method for positioning a target in a three-dimensional CT image and a security check system. The method includes: displaying a three-dimensional CT image; receiving a selection by a user of at least one area of the three-dimensional CT image at a first viewing angle to generate a first three-dimensional description; receiving a selection by the user of at least one area of the three-dimensional CT image at a second viewing angle to generate a second three-dimensional description, wherein an angle between the first viewing angle and the second viewing angle is within a predetermined range and the first three-dimensional description and the second three-dimensional description are related to a size, a location, and/or a physical property of a target at corresponding viewing angles; and determining the target in the three-dimensional CT image based on the first three-dimensional description and the second three-dimensional description.

Method for positioning target in three-dimensional CT image and security check system

Growing community of inventors

Beijing, China

Yunda Sun