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：EP4017368A1

公开(公告)日：2022-06-29

申请号：EP20853909.8

申请日：2020-08-21

申请人： The University of North Carolina at Chapel Hill

发明人： PUETT, Connor ,  ZHOU, Otto Z. ,  LU, Jianping ,  INSCOE, Christina

IPC分类号： A61B6/02 ,  A61B6/14 ,  A61B6/00 ,  G06T11/00

公开(公告)号：EP1328960A1

公开(公告)日：2003-07-23

申请号：EP01981327.8

申请日：2001-09-27

申请人： The University of North Carolina at Chapel Hill

发明人： ZHOU, Otto, Z. ,  LU, Jianping

IPC分类号： H01J35/22

CPC分类号： H01J35/14 ,  A61B6/032 ,  A61B6/4021 ,  A61B6/4028 ,  A61B6/405 ,  A61B6/4488 ,  A61B6/482 ,  B82Y10/00 ,  H01J35/065 ,  H01J35/22 ,  H01J2201/30469 ,  H01J2235/064 ,  H01J2235/068 ,  H05G1/34 ,  Y10S977/939

摘要： An x-ray generating device includes a field emission cathode formed at least partially from a nanostructure (1110) containing material having an emitted electron current density of at least 4 A/cm2. High energy conversion efficiency and compact design (1100) are achieved due to easy focusing of cold cathode emitted electron between the cathode (1110) and the gate or anode (1130) and focusing the electron beams at different anode materials (1130), pulsed x-ray radiation with varying energy can be generated from a single device.

公开(公告)号：EP1627410A2

公开(公告)日：2006-02-22

申请号：EP04775902.2

申请日：2004-04-22

申请人： THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL

发明人： ZHOU, Otto, Z. ,  LU, Jianping ,  LEE, Yueh ,  LIN, Weili ,  CHENG, Yuan ,  ZHANG, Jian

IPC分类号： H01J35/32

CPC分类号： B82Y10/00 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/4085 ,  A61B6/4275 ,  A61B6/482 ,  A61B6/508 ,  A61B6/5235 ,  A61B6/541

摘要： Computed tomography device comprising an x-ray source (100) and an x-ray detecting unit. The x-ray source comprises a cathode (102) with a plurality of individually programmable electron emitting units (104) that each emit an electron (106) upon an application of an electric field, an anode target (108) that emits an x-ray (110) upon impact by the emitted electron, and a collimator (112). Each electron emitting unit includes an electron field emitting material. The electron field emitting material includes a nanostructured material or a plurality of nanotubes or a plurality of nanowires. Computed tomography methods are also provided.

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.

公开(公告)号：EP3975857A1

公开(公告)日：2022-04-06

申请号：EP20813772.9

申请日：2020-05-29

申请人： The University of North Carolina at Chapel Hill

发明人： ZHOU, Otto Z. ,  LU, Jianping

IPC分类号： A61B6/14 ,  A61B6/00 ,  A61B6/03 ,  A61B6/02