Shanghai United Imaging Healthcare Co., Ltd.

Wangsu Science & Technology Co., Ltd.

Xin Xiao

Xi Zhang

Tao He

Shiping Liang

Systems and methods for determining an offset of a position of a focal point of an X-ray tube is provided. The methods may include obtaining at least one parameter associated with an X-ray tube during a scan of a subject. The methods may further include determining a target offset of a position of a focal point based on the at least one parameter and a target relationship between a plurality of reference parameters associated with the X-ray tube and a plurality of reference offsets of reference positions of the focal point. The methods may further include causing, based on the target offset, a correction on the position of the focal point of the X-ray tube.

Systems and methods for correction of position of focal point

The present disclosure provides a method for multi-group audio-video interaction, including: receiving a virtual group creation request initiated by a first user, creating a first virtual group, and determining a first session group the first user belonging to; associating the first session group with the first virtual group, and adding all session users in the first session group to the first virtual group; determining a second session group a second user belonging to, when receiving a virtual group join request initiated by the second user; associating the second session group with the first virtual group, and adding all session users in the second session group to the first virtual group; and sending a user list of the second session group to other session users in the first virtual group, to enable the other session users to incrementally pull and play an audio-video stream according to the user list.

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Shanghai, China

Xin Xiao