Chinese Academy of Sciences

Shenzhen Institutes of Advanced Technology

Yaoqin Xie

Yanchun Zhu

Zhicheng Zhang

Yili Chen

Lei Zhang

Yanjun Liu

Jia Gu

Tianye Niu

Mingmin Chen

Nan Fu

Xiaokun Liang

Rongmao Li

Shaode Yu

Shanshan Zang

Tiexiang Wen

A method and apparatus for optimizing a blocking grating for cone beam CT image scattering correction, wherein the method comprises: scanning a blocking grating to establish a swinging model thereof; setting initial coordinates of the blocking grating along a longitudinal direction of a detector in an initial projection, and establishing an objective function between CBCT image data missing voxel values and the coordinates of the blocking grating along the longitudinal direction of the detector according to the swinging model; minimizing the objective function with a mesh-adaptive direct search algorithm to generate optimized coordinates of the blocking grating along the longitudinal direction of the detector. The present disclosure proposes a brand new scattering correction method not requiring any source compensation, performs a mathematical optimization modeling of the data missing caused by the blocking grating in the image domain, quantitatively evaluates the influence on the reconstructed image by a blocker, solves a geometric optimal structure of the blocker using a mesh-adaptive direct search algorithm, and lays a solid theory foundation for the scattering correction method based on the blocker measurement.

Method and apparatus for optimizing blocking grating for cone beam CT image scattering correction

A virtual reality guide hypnosis speech processing method and apparatus, wherein the method comprises: performing a text analysis for a hypnosis guide language, so as to obtain text hierarchical information of the hypnosis guide language; performing a speech analysis for the hypnosis guide language, so as to obtain speech rhythm information of the hypnosis guide language; searching a hypnosis speech library for corresponding speech units, according to the text hierarchical information and the speech rhythm information of the hypnosis guide language, the hypnosis speech library storing speech units generated according to corpus data recorded by a user's susceptible person; synthesizing found speech units into hypnosis speech data; and synthesizing the hypnosis speech data with a virtual reality hypnosis scene, and outputting a virtual reality guide hypnosis speech. The present disclosure can improve the user's hypnosis susceptibility and optimize the hypnosis effect.

Virtual reality guide hypnosis speech processing method and apparatus

The invention provides a method and a device for seeing through an obstruction based on smart glasses, and a computer-readable storage medium, the method comprising: acquiring a first image of user's view by smart glasses and recognizing an obstruction image in the first image; acquiring a second image of the user's view by at least one image acquisition device; replacing the obstruction image in the first image with portion of the second image that corresponds to the obstruction image, which are spliced to generate an unobstruction image of the user's view. In the invention, the obstruction image in the first image is replaced with a portion of the second image that corresponds to the obstruction image, which can achieve seeing through an obstruction.

Method and device for seeing through an obstruction based on smart glasses, and computer-readable storage medium

An ultrasound probe calibration system and method. The system comprises an ultrasound probe calibration phantom (), and the ultrasound probe calibration phantom () is provided with a sunken recess () at a middle position of an upper surface thereof and with several conical holes on a side surface thereof. The sunken recess () is fixedly connected with a two dimensional ultrasound probe () therein. The conical hole is inserted with an NDI insertion stylus (), and a tip of the NDI insertion stylus () can be acquired in ultrasound imaging. An ultrasound probe calibration system employing the above structure enables a midplane of an ultrasound plane to pass a midplane of an ultrasound probe calibration phantom () along a middle gap, such that a tip of an NDI insertion stylus () is used for the midplane of the ultrasound plane, thereby addressing the problem of misalignment of a point-type phantom or a two-dimensional plane-type phantom to the ultrasound plane.

Ultrasound probe calibration phantom, ultrasound probe calibration system and calibration method thereof

Growing community of inventors

Guangdong, China

Yaoqin Xie