公开(公告)号：US20170213364A1

公开(公告)日：2017-07-27

申请号：US15004293

申请日：2016-01-22

Applicant: General Electric Company

Inventor： Jonathan Immanuel SPERL ,  Dirk BEQUE

IPC: G06T11/00 ,  G01N23/04

CPC classification number: G06T11/003 ,  A61B6/00 ,  A61B6/484 ,  G01N23/046 ,  G01N2223/401 ,  G06T2211/40

Abstract: Reconstructing under-sampled PCT data includes obtaining under-sampled scan data of a subject-under-test, the object scan performed on a phase contrast computed tomography (PCT) system, performing a regularized Fourier analysis on the under-sampled scan data, correcting for one or more PCT system contributions to the under-sampled scan data by dividing the computed Fourier coefficients by Fourier coefficients representative of the one or more PCT system contributions, obtaining at least one of an absorption sinogram, a differential phase sinogram, and a dark field sinogram from the corrected Fourier coefficients, and performing tomographic reconstruction on the obtained absorption sinogram, the obtained differential phase sinogram, and the obtained dark field sinogram. A system and non-transitory computer readable medium are also disclosed.

公开(公告)号：US20150323439A1

公开(公告)日：2015-11-12

申请号：US14274160

申请日：2014-05-09

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Philip Harold MONAGHAN ,  Clifford BUENO ,  Jonathan Immanuel SPERL ,  Cristina Francesca COZZINI

IPC: G01N9/24 ,  G01T1/29 ,  G01N23/04

CPC classification number: G01N9/24 ,  G01N23/04 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/652 ,  G01T1/2985

Abstract: A method and system are provided for elementally detecting variations in density. The method includes providing a computed tomography device, comprising a radiation source, a detector, and at least one grating between the radiation source and the detector, positioning the component between the radiation source and the detector, directing radiation from the radiation source to the detector to acquire information from the component, generating at least one phase contrast image and at least one dark field contrast image of the component corresponding to variations in density with the information from the component, correlating the variations in density to a foreign mass, and displaying foreign mass distribution within the component. The system includes a radiation source, a detector, a component, a first grating, a second grating, and an analysis device capable of determining total variation of density in response to radiation received by the detector, and correlating the variation of density to free element distribution in the component.

Abstract translation: 提供了一种用于元素检测密度变化的方法和系统。 该方法包括提供计算机断层摄影装置，其包括辐射源，检测器和辐射源与检测器之间的至少一个光栅，将分量定位在辐射源和检测器之间，将辐射源从辐射源引导到检测器 从部件获取信息，产生至少一个相位对比图像和与密度变化相对应的分量的至少一个暗场对比图像与来自分量的信息，将密度变化与外来质量相关联，并显示外来 组件内的质量分布。 该系统包括辐射源，检测器，部件，第一光栅，第二光栅和分析装置，其能够确定响应于由检测器接收的辐射的密度的总变化，并且将密度变化与自由元素相关联 分配在组件中。