公开(公告)号：EP1941264A2

公开(公告)日：2008-07-09

申请号：EP06815214.9

申请日：2006-09-22

申请人： The University of North Carolina At Chapel Hill

发明人： ZHOU, Otto, Z. ,  LU, Jianping ,  ZHANG, Jian ,  YANG, Guang ,  LEE, Yueh ,  QIU, Qi ,  CHENG, Yuan

IPC分类号： G01N23/04

CPC分类号： A61B6/482 ,  A61B6/025 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/466 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： Methods, systems, and computer program products for multiplexing computed tomography are disclosed. According to one aspect, the subject matter described herein can include illuminating an object with a plurality of x-ray beams from a plurality of viewing angles, wherein each x-ray beam has a distinct waveform; detecting the x-ray intensities of the plurality of pulsed x- ray beams as a function of time, and extracting individual projection image data from the detected x-ray intensities based on the distinct waveforms of the x-ray beams for combining the projection image data to generate three- dimensional tomographic image data of the object.

公开(公告)号：EP1476889A1

公开(公告)日：2004-11-17

申请号：EP03702044.3

申请日：2003-01-09

申请人： The University of North Carolina at Chapel Hill

发明人： ZHOU, Otto, Z. ,  LU, Jianping ,  QIU, Qi

IPC分类号： H01J35/00

CPC分类号： H01J35/14 ,  A61B6/032 ,  A61B6/4028 ,  B82Y10/00 ,  H01J35/065 ,  H01J35/22 ,  H01J2201/30469 ,  H01J2235/064 ,  H01J2235/068 ,  H05G1/34

摘要： A structure to generate x-rays has a plurality of stationary and individually electrically addressable field emissive electron sources (402) with a substrate composed of a field emissive material, such as carbon nanotubes. Electrically switching the field emissive electron sources at a predetermined frequency field emits electrons in a programmable sequence toward an incidence point on a target. The generated x-rays correspond in frequency and in position to that of the field emissive electron source. The large-area target (404) and array or matrix of emitters (402) can image objects (416) from different positions and/or angles without moving the object or the structure (400) and can produce a three dimensional image. The x-ray system is suitable for a variety of applications including industrial inspection/quality control. Analytical instruments, security systems such as airport security inspection systems and medical imaging, such as computed tomography.