公开(公告)号：US07599465B2

公开(公告)日：2009-10-06

申请号：US11692086

申请日：2007-03-27

申请人： Deborah Joy Walter ,  Yanfeng Du ,  Kelly Lynn Piacsek

发明人： Deborah Joy Walter ,  Yanfeng Du ,  Kelly Lynn Piacsek

IPC分类号： A61B6/00

CPC分类号： A61B6/405 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4042 ,  A61B6/4241 ,  A61B6/481 ,  A61B6/482 ,  A61B6/504 ,  A61B6/583 ,  G06T7/0012 ,  G06T7/136 ,  G06T2207/10081 ,  G06T2207/30032 ,  G06T2207/30101

摘要： An imaging scanner includes a radiation source, a radiation detector, and a computer programmed to decompose CT data acquired by the radiation detector into a set of pixels, each pixel having at least a first basis material content and a second basis material content. The computer is further programmed to identify a first subset of the set of pixels as a possible embolism, based on the content of the first basis material and the content of the second basis material.

摘要翻译： 成像扫描器包括辐射源，辐射检测器和被编程为将由辐射检测器获取的CT数据分解为一组像素的计算机，每个像素具有至少第一基础材料内容和第二基础材料内容。 计算机还被编程为基于第一基础材料的内容和第二基础材料的内容，将该组像素的第一子集识别为可能的栓塞。

公开(公告)号：US20090232277A1

公开(公告)日：2009-09-17

申请号：US12178128

申请日：2008-07-23

申请人： Forrest Frank Hopkins ,  Clifford Bueno ,  Yanfeng Du ,  Joseph Bendahan

发明人： Forrest Frank Hopkins ,  Clifford Bueno ,  Yanfeng Du ,  Joseph Bendahan

IPC分类号： G01N23/04

CPC分类号： G01N23/046 ,  G01N2223/419 ,  G01N2223/501 ,  G01N2223/643

摘要： An inspection system is provided. The inspection system includes at least one radiation source including single or multiple energies and configured to transmit a radiation beam through an object under inspection. The inspection system further includes an array of detectors configured to receive multiple radiation beams transmitted through the object, wherein the array of detectors are oriented at different angles with respect to the radiation beam and wherein at least one of the radiation source, and the array of detectors or the object is configured to be actuated in a translational direction relative to each other. The inspection system further includes processing circuitry coupled to the array of detectors and configured to generate a three dimensional image of the object.

摘要翻译： 提供检查系统。 检查系统包括至少一个包括单个或多个能量的辐射源，并且被配置为将辐射束透过被检查物体。 检查系统还包括检测器阵列，其被配置为接收透过物体的多个辐射束，其中检测器阵列相对于辐射束以不同的角度定向，并且其中辐射源和阵列中的至少一个 检测器或物体被配置为在相对于彼此的平移方向上被致动。 检查系统还包括耦合到检测器阵列并被配置为产生对象的三维图像的处理电路。

公开(公告)号：US07583790B2

公开(公告)日：2009-09-01

申请号：US11677963

申请日：2007-02-22

申请人： David M. Hoffman ,  James Walter LeBlanc ,  John Eric Tkaczyk ,  Robert F. Senzig ,  Yanfeng Du

发明人： David M. Hoffman ,  James Walter LeBlanc ,  John Eric Tkaczyk ,  Robert F. Senzig ,  Yanfeng Du

IPC分类号： H05G1/64

CPC分类号： G01T1/2928 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/5205

摘要： A CT detector capable of energy discrimination and direct conversion is disclosed. The detector includes multiple layers of semiconductor material with the layers having varying thicknesses. The detector is constructed to be segmented in the x-ray penetration direction so as to optimize count rate performance as well as avoid saturation. The detector also includes variable pixel pitch and a flexible binning of pixels to further enhance count rate performance.

公开(公告)号：US20080273666A1

公开(公告)日：2008-11-06

申请号：US11690245

申请日：2007-03-23

申请人： Deborah Joy Walter ,  Xiaoye Wu ,  John Eric Tkaczyk ,  Yanfeng Du

发明人： Deborah Joy Walter ,  Xiaoye Wu ,  John Eric Tkaczyk ,  Yanfeng Du

IPC分类号： H05G1/26

CPC分类号： A61B6/505 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/481 ,  A61B6/583

摘要： A system and method of density and effective atomic number imaging include a computer programmed to acquire projection data from the detector of an unknown material at the time of projection data acquisition. The computer is also programmed to generate a density image for the unknown material based on a calibration of two or more known basis materials and to generate an effective atomic number (Z) for the unknown material based on the calibration of two or more known basis materials and based on a function arctan of a ratio of atomic numbers of the two or more known basis materials. The density and effective atomic number images are stored to a computer readable storage medium.

摘要翻译： 密度和有效原子序数成像的系统和方法包括被编程为在投影数据采集时从未知材料的检测器获取投影数据的计算机。 计算机还被编程为基于两种或多种已知基础材料的校准产生未知材料的密度图像，并且基于两种或更多种已知基础材料的校准来产生未知材料的有效原子序数（Z） 并且基于两种或多种已知基础材料的原子序数比的函数关系。 密度和有效原子序数图像被存储到计算机可读存储介质中。

公开(公告)号：US07382853B2

公开(公告)日：2008-06-03

申请号：US10904736

申请日：2004-11-24

申请人： Jerome S. Arenson ,  David Ruimi ,  Lev Greenberg ,  Yanfeng Du

发明人： Jerome S. Arenson ,  David Ruimi ,  Lev Greenberg ,  Yanfeng Du

IPC分类号： H05G1/26

CPC分类号： G01T1/1644 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/583 ,  G01T1/1647 ,  G06T5/002 ,  G06T5/20 ,  G06T2207/10081 ,  G06T2207/30004 ,  G06T2207/30112 ,  Y10S378/901

摘要： An adaptive CT data acquisition system and technique is presented whereby radiation emitted for CT data acquisition is dynamically controlled to limit exposure to those detectors of a CT detector assembly that may be particularly susceptible to saturation during a given data acquisition. The data acquisition technique recognizes that for a given subject size and position that pre-subject filtering and collimating of a radiation beam may be insufficient to completely prevent detector saturation. Therefore, the present invention includes implementation of a number of CT data correction techniques for correcting otherwise unusable data of a saturated CT detector. These data correction techniques include a nearest neighbor correction, off-centered phantom correction, off-centered synthetic data correction, scout data correction, planar radiogram correction, and a number of others. The invention is applicable with energy discriminating CT systems as well as with conventional CT systems and other multi-energy CT systems, such as dual kVp-based systems.

摘要翻译： 提出了一种自适应CT数据采集系统和技术，其中动态地控制用于CT数据采集的辐射，以限制在给定数据采集期间可能特别容易饱和的CT检测器组件的那些检测器的暴露。 数据采集​​技术认识到，对于给定的主体大小和位置，预辐射滤波和辐射束的准直可能不足以完全防止检测器饱和。 因此，本发明包括实现用于校正饱和CT检测器的其他不可用数据的多个CT数据校正技术。 这些数据校正技术包括最近邻校正，偏心幻像校正，偏心合成数据校正，侦察数据校正，平面放射线图校正以及其他数目。 本发明适用于能量识别CT系统以及常规CT系统和其他多能CT系统，例如基于双kVp的系统。