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Dive into the research topics where Chang Yan is active.

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Featured researches published by Chang Yan.


international conference on orange technologies | 2013

MRI image reconstruction under linear and hyperbolic gradients

Xu Yajie; Tian Hao-ran; Zhu Zhen-wei; Zhang Guangcai; Chang Yan; Jiang Ruirui; Wang Xiao-guan; Yang Xiaodong

Nonlinear gradient imaging has advantages of lower peripheral nerve stimulation (PNS), fast imaging rate, and high edge resolution, but the blurring exists in the center part. To resolve this problem, linear gradient x, y is employed together with nonlinear gradient, such as 4-Dimensional Radial In/Out (4DRIO), O-Space, etc. In this paper, we propose a hyperbola method, using x, y gradient and hyperbolic nonlinear gradient x2 - y2. Numerical simulation reveals that hyperbola sampling scheme and iterative algorithm leads to high efficiency in image reconstruction, and hyperbola method shows better reconstruction compare with O-Space technology.


Archive | 2014

Imaging method for MRI contrast enhancement

Chang Yan; Wei Daxiu; Yang Xiaodong


Archive | 2017

Gradient device and system for magnetic resonance imaging equipment

Xu Yajie; Hector Sanchez Lopez; Chang Yan; Yang Xiaodong


Archive | 2017

Virtual reality stimulation device for functional magnetic resonance imaging

Wu Zhenzhou; Ma Changyu; Chang Yan; Yang Xiaodong


Archive | 2017

Expansion adjustable protective case for surgical electric knife heads

Liu Wei; Yang Jie; Chang Yan; Wu Zhenzhou; Yang Xiaodong


Archive | 2017

Magnetic resonance imaging system and its parameter determining method

Xu Yajie; Chang Yan; Chen Qiaoyan; Yang Xiaodong


Archive | 2017

Active contour image segmentation method for Gaussian mixture model

Wang Lei; Chang Yan; Chen Guangqiang; Yang Yi; Yang Xiaodong


Archive | 2017

Active contour image segmentation method based on local fitted image

Wang Lei; Chang Yan; Wang Hui; Wu Zhenzhou; Yang Xiaodong


Archive | 2016

Sensitive medical nuclear magnetic resonance equipment

Yang Xiaodong; Liang Xianfeng; Wei Daxiu; Chang Yan


Archive | 2016

High resolution nuclear magnetic resonance analyzer

Yang Xiaodong; Liang Xianfeng; Wei Daxiu; Chang Yan

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Liu Wei

Chinese Academy of Sciences

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