Nanovision Technology (Beijing) Co., Ltd.

Zhili Cui

Jian Gao

Yunxiang Li

Hongguang Cao

Jinhui Xing

Jie Luo

Hailiang Zheng

Qing Wei

Tong Chang

Baolei Li

Yantao Hu

Youwei Zhang

Qingliang Guo

Disclosed are an auto exposure control system and an image calibration method. The system comprises a main control unit and a plurality of auto exposure units, wherein the main control unit is connected to each of the auto exposure units; and the auto exposure units are in cascading connection. According to the system, detection of each X-ray source is realized by means of auto exposure units, such that an energy accumulation value and a KV level of X-rays are obtained; and when the energy accumulation value of X-rays reaches an energy threshold value, an auto exposure control signal is sent to a main control unit, such that the main control unit adjusts an exposure time sequence according to the auto exposure control signal, the aim of auto exposure control is achieved.

Auto exposure control system and image correction method

A multi-energy static security CT system comprises at least one N-stage image chain structure () and a baggage conveying belt () provided at an inner side at the bottom of the N-stage image chain structure (). The N-stage image chain structure () and the baggage conveying belt () are fixed at a pre-configured positions by means of a machine frame (). The N-stage image chain structures () are sequentially arranged in a forward direction of a baggage channel, and adjacent N-stage image chain structures () are offset relative to each other. By exposing radiation sources in the N-stage image chain structure () at different times, the static security CT system generates an image having a higher temporal resolution and more energy spectrum levels than an image generated by a spiral CT system. Also provided is an imaging method implemented by means of the static security CT system.

Multi-energy static security CT system and imaging method

Provided are a scanning-type X-ray source and an imaging system therefor. The scanning-type X-ray source comprises a vacuum cavity (), wherein a cathode () and a plurality of anode target structures () are arranged in the vacuum cavity (); a gate electrode () is arranged in a position, close to the cathode (), in the vacuum cavity (); a focusing electrode () is arranged in a position, close to the gate electrode (), in the vacuum cavity (); and a deflection coil () is arranged in a position, close to the gate electrode (), at the outer periphery of the vacuum cavity (). The scanning-type X-ray source generates electron beams by using cathode (), controls the powering-on/off of the electron beams by the gate electrode (), and the deflection coil () controls the direction of motion of the electron beams, so as to complete the switching between multiple focuses.

Scanning-type x-ray source and imaging system therefor

Disclosed are a high-speed real-time bus system and a data processing method thereof. Each node device forms an annularly connected topological structure by means of a high-speed real-time bus; a master node device respectively sends a bus clock signal and a data signal to a slave node device of the next grade of the master node device in the topological structure by means of a clock channel and a data channel; each slave node device receives the bus clock signal and the data signal sent from the respective node device of the previous grade, performs data processing according to the bus clock signal and the data signal so as to update the data signal and sends the bus clock signal and the updated data signal to the respective node device of the next grade.

High-speed real-time bus system and data processing method thereof

Provided is an arc-shaped multi-focal point fixed anode gate controlled ray source, comprising an arc-shaped ray source housing, a ray tube bracket, a plurality of fixed anode reflected ray tubes and a plurality of gate controlled switches, wherein the plurality of fixed anode reflected ray tubes are fixed on the arc-shaped ray source housing by means of the ray tube bracket, and the focal points of the plurality of fixed anode reflected ray tubes are distributed on the same distribution circle; and the plurality of gate controlled switches are correspondingly connected to the plurality of fixed anode reflected ray tubes. By splicing the plurality of arc-shaped multi-focal point fixed anode gate controlled ray sources into an integral ring stricture, the focal points of all the fixed anode reflected ray tubes therein can be distributed on, the same distribution circle.

Arc-shaped multi-focal point fixed anode gate controlled ray source

The present invention discloses a stationary real-time CT imaging system, comprising an annular photon counting detector, an annular scanning x-ray source, and a scanning sequence controller. Under the control of the scanning sequence controller, the annular scanning x-ray source emits x-ray, and the x-ray penetrates the object being tested and projects onto the corresponding annular photon counting detector. The annular photon counting detector delivers the corresponding exposure information through the main scanning machine and the main controlling unit to a CT main machine and a human-machine interface unit. The image reconstruction is completed in the CT main machine and the human-machine interface unit. By electronically controlling and switching x-ray projection positions in order, the scanning speed is enhanced by tens of times, thereby obtaining dynamic 3D images. The use of the photon counting detector enables the access to absorption data and energy data, thereby allows for real-time data reconstruction.

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Beijing, China

Zhili Cui