Shanghai United Imaging Healthcare Co., Ltd.

Shanghai Tianyun Environmental Protection Technology Co., Ltd.

Zhejiang Tianqing Environmental Protection Technology Co., Ltd.

Jianwei Fu

Wei Zhang

Cheng Ni

Li Wang

Tao Liu

Yuan Bao

Jin Zhou

Buliang Sun

Yunzheng Zhou

Meili Yang

Libo Fang

The present disclosure may provide a radiation system. The radiation system may include a treatment head, a detector, a plurality of imaging sources, and a gantry. The treatment head, the detector, and the plurality of imaging sources may be mounted on the gantry. The treatment head may be configured to deliver a treatment beam toward an object. The plurality of imaging sources may be configured to deliver a plurality of imaging beams toward the object. At least two of the plurality of imaging sources may share the detector. The detector may be configured to detect at least two of the plurality of imaging beams. The detected at least two imaging beams may be emitted by different imaging sources of the at least two imaging sources.

X-ray imaging system for radiation therapy

Systems and methods for a parameter adjustment of a multi-energy computed tomography (CT) device is provided. The systems and methods may obtain, by at least one processor, a parameter set associated with a scan to be performed using a multi-energy CT device. The parameter set may include multiple scanning parameters and multiple reconstruction parameters. The systems and methods may also determine, by the at least one processor, a maximum pitch associated with the scan based on a correlation relationship and the parameter set. The correlation relationship may describe a correlation between a pitch of the multi-energy CT device and the parameter set.

Systems and methods for a parameter adjustment of a multi-energy computed tomograph device

A method for determining at least one artifact calibration coefficient is provided. The method may include obtaining preliminary projection values of a first object. The radiation rays may be detected by at least one radiation detector. The method may further include generating a preliminary image of the first object based on the preliminary projection values of the first object and generating calibrated projection values of the first object based on the preliminary image. The method may further include determining a relationship between the preliminary projection values and the calibrated projection values. The method may further include, for each of the at least one radiation detector, determining a location of the radiation detector and determining an artifact calibration coefficient corresponding to the radiation detector based on the relationship between the preliminary projection values and the calibrated projection values and the location of the radiation detector.

Systems and methods for determining at least one artifact calibration coefficient

A computerized tomography artifact correction method includes: receiving scanning data; reconstructing an image to be corrected and a reference image of the image to be corrected based on the scanning data; determining proportions of a first substance for pixels of the reference image; obtaining a base image of the first substance based on the proportions of the first substance; performing a projection of the base image of the first substance and the reference image to obtain a plurality of projection lines; for each of the plurality of projection lines, obtaining an equivalent length of the first substance corresponding to the projection line and selecting a hardening correction coefficient based on the equivalent length of the first substance corresponding to the projection line; and performing an artifact correction on the image to be corrected based on the hardening correction coefficients.

Systems and methods for artifact correction of computerized tomography

The present invention belongs to the technical field of air sterilizing and purification and in particular relates to a plasma air sterilizing and purifying device and an air sterilizing and purifying method. The plasma air sterilizing and purifying device comprises a plasma reactor, a pulse power supply, a fan component, a control device, a power adaptor, and a housing case, wherein the reactor is provided with positive electrodes formed by several nickel-chromium alloy wires or nickel-chromium alloy belts, and the two ends of each positive electrodes are fixed in the corresponding grooves on the micro-discharge preventive conductor rail; and a pulse power supply has a digital control circuit with an oscillator, an error amplifier and a PWM comparator inside which converts signals into a digital control current to control the width of the high-voltage pulse.

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Shanghai, China

Jianwei Fu