Shanghai United Imaging Healthcare Co., Ltd.

Shanghai Hanmai Electronic Technology Co., Ltd

Lilong Wang

Cheng Li

Yufei Mao

Xiaodong Wang

Xiaolin Meng

Xiaohui Wu

Lijia Wang

Jing Liu

Fei Wang

Ce Wang

Liangliang Pan

Jieyan Ma

Jiyong Wang

Bin Tan

Zhao Zhang

Qi Duan

Shuai Wang

Wenqing Liu

Yong Luo

Chuanfeng Lyu

Chuanfeng Lv

Wenhua Wang

Jie Qu

Shili Cao

Fanfan Zhang

Lianghai Jin

A method for controlling a buck converter is provided. The method includes monitoring an inductor current flowing through an inductor in the buck converter. The method includes controlling the buck converter to operate in a pulse frequency modulation (PFM) mode with intermittent conduction if the inductor current experiences a plurality of cross-zero periods. The method further includes adjusting a power consumption of a component in the buck converter according to the plurality of cross-zero periods of the inductor current, when the buck converter is operating in the PFM mode.

Method and device for controlling buck converter and chip

A zero-crossing state detection device for a converter and a converter device. The converter includes a first type of power switch electrically coupled between an input terminal and a switch node, a second type of power switch electrically coupled between the switch node and a ground terminal, and an inductor electrically coupled between the switch node and an output terminal. The zero-crossing state detection device includes: a zero-crossing state indication circuit, which is configured to generate an indication signal indicating the zero-crossing state of the inductor current flowing through the inductor, based on a voltage at the switch node after the second type of power switch is turned off and before the first type of power switch is turned on, according to first and second driving signals respectively applied to the first type of power switch and the second type of power switch. Efficiently and accurately monitoring the zero-crossing state of the inductor current cycle by cycle in real-time, serving as a basis for switching between different operating modes of light load and heavy load of the converter.

Zero-crossing state detection device for converter

A system and method for image segmentation are provided. A three-dimensional image data set representative of a region including at least one airway may be acquired. The data set may include a plurality of voxels. A first-level seed within the region may be identified. A first-level airway within the region may be identified based on the first-level seed. A second-level airway may be identified within the region based on the first-level airway. The first-level airway and the second-level airway may be fused to form an airway tree.

System and method for image segmentation

A method and system for image processing is provided. The technique includes acquiring data related to the processing, performing a pre-processing of the data, performing a segmentation of a subject, performing a post-processing of the result of the segmentation and managing storage of the data. The post-process includes a calibrating and a rendering of the data.

Methods and systems for identifying spine or bone regions in computed tomography image sequence

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Shanghai, China

Lilong Wang