公开(公告)号：US20170132793A1

公开(公告)日：2017-05-11

申请号：US15412838

申请日：2017-01-23

Applicant: Shenzhen Institutes of Advanced Technology

Inventor： Qingmao HU ,  Tianqiao ZHANG

IPC: G06T7/12 ,  G06T7/00 ,  G06T7/11 ,  G06T5/20

CPC classification number: G06T7/12 ,  G06T5/20 ,  G06T7/0012 ,  G06T7/11 ,  G06T7/149 ,  G06T2207/10101 ,  G06T2207/20016 ,  G06T2207/20024 ,  G06T2207/20104 ,  G06T2207/20116 ,  G06T2207/30041

Abstract: The present disclosure provides a method for acquiring a retina structure from an optical coherence tomographic image and a system thereof. The method comprises: calculating a region of interest (ROI) image of a source image; performing a Gaussian filtering of the ROI image; calculating a first estimated boundary position of a first layer boundary and a second estimated boundary position of a second layer boundary using a multi-resolution method; refining the first layer boundary and the second layer boundary respectively using a simplified active contour model according to the first estimated boundary position and the second estimated boundary position, to obtain a first initial boundary position of the first layer boundary and a second initial boundary position of the second layer boundary; smoothing the first initial boundary position and the second initial boundary position using a filtering method; acquiring segmentation positions of rest layer boundaries in the ROI image according to a segmented position of the first layer boundary and a segmented position of the second layer boundary. The present disclosure can improve the calculation speed and reduce the calculation complexity while maintaining high location accuracy.

公开(公告)号：US20150265178A1

公开(公告)日：2015-09-24

申请号：US14439156

申请日：2014-09-25

Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY

Inventor： Qingmao HU

IPC: A61B5/055 ,  A61B5/026 ,  G01R33/563

CPC classification number: A61B5/055 ,  A61B5/0263 ,  A61B2576/00 ,  G01R33/56341

Abstract: The present invention discloses a method and apparatus for determining characteristics of cerebral ischemia based on magnetic resonance diffusion weighted imaging, so as to provide a more objective basis for determining whether an acute cerebral ischemia patient should be treated with thrombolysis. The method comprises: determining a cerebral ischemia region of a patient based on magnetic resonance diffusion weighted imaging of the patient, wherein the cerebral ischemia region comprises a core region and a transition region; determining an apparent diffusion coefficient ADC characteristic parameter ADCr in a region with high DWI values in the magnetic resonance diffusion weighted imaging according to diffusion weighted image DWI values in the core region and transition region; and judging whether ADC values in the region with high DWI values and the region with high DWI values are mismatched according to the ADC characteristic parameter ADCr. The method according to embodiments of the present invention provides a more scientific and objective basis for making a decision on whether the acute cerebral ischemia patient should be treated with thrombolysis, thereby improving a cure rate of the cerebral ischemia patient.

Abstract translation: 本发明公开了一种基于磁共振扩散加权成像确定脑缺血特征的方法和装置，为确定急性脑缺血患者是否应用溶栓治疗提供更客观的依据。 该方法包括：基于患者的磁共振扩散加权成像确定患者的脑缺血区域，其中所述脑缺血区域包括核心区域和过渡区域; 根据核心区域和过渡区域的扩散加权图像DWI值，在磁共振扩散加权成像中确定具有高DWI值的区域中的表观扩散系数ADC特性参数ADCr; 并根据ADC特性参数ADCr判断具有高DWI值的区域中的ADC值和DWI值高的区域是否匹配。 根据本发明的实施方案的方法为决定急性脑缺血患者是否应用溶栓治疗提供了更科学和客观的依据，从而提高了脑缺血患者的治愈率。