公开(公告)号：US20070120062A1

公开(公告)日：2007-05-31

申请号：US11291273

申请日：2005-11-30

申请人： Wen Li ,  John Tkaczyk ,  Yanfeng Du ,  James Leblanc

发明人： Wen Li ,  John Tkaczyk ,  Yanfeng Du ,  James Leblanc

IPC分类号： G01T1/24 ,  G01T1/26 ,  H01L27/146

CPC分类号： H01L27/14603 ,  G01T1/2928 ,  H01L27/14659

摘要： Briefly, in accordance with one or more embodiments, count rates may be obtained from one or more subpixels for a given pixel in an imaging system detector. Count rates may be obtained from individual subpixels, or may be from electronically binned subpixels at least in part in various subpixel arrangements where a selected subpixel arrangement may be adaptively set according to a detected count rate. For lower count rates, two or more subpixels may be electronically binned together and the counts may be obtained from the binned subpixels, for example to mitigate a charge sharing effect. For higher count rates, the count rates of a greater number of subpixels may be individually obtained, for example to mitigate a pulse pile-up effect. Detective quantum efficiency may be optimized over a wider range of photon flux rate via the adaptive subpixel arrangement.

摘要翻译： 简而言之，根据一个或多个实施例，可以从成像系统检测器中的给定像素的一个或多个子像素获得计数率。 可以从各个子像素获得计数速率，或者可以至少部分地根据检测到的计数速率自适应地选择所选择的子像素排列的各种子像素排列从电子分组的子像素获得。 对于较低的计数率，可以将两个或更多个子像素电子地分组在一起，并且可以从二进制子像素获得计数，例如以减轻电荷共享效应。 对于更高的计数率，可以单独获得更多数量的子像素的计数率，例如以减轻脉冲堆积效应。 可以通过自适应子像素排列在更宽的光子通量速率范围内优化探测量子效率。

公开(公告)号：US20070116173A1

公开(公告)日：2007-05-24

申请号：US11627072

申请日：2007-01-25

申请人： Jerome Arenson ,  Evgeny Drapkin ,  Yanfeng Du ,  Lev Greenberg ,  Oded Meirav ,  David Ruimi ,  John Tkaczyk ,  Xiaoye Wu

发明人： Jerome Arenson ,  Evgeny Drapkin ,  Yanfeng Du ,  Lev Greenberg ,  Oded Meirav ,  David Ruimi ,  John Tkaczyk ,  Xiaoye Wu

IPC分类号： A61B6/00 ,  H05G1/60 ,  G01N23/00 ,  G21K1/12

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.

公开(公告)号：US20070189443A1

公开(公告)日：2007-08-16

申请号：US11692086

申请日：2007-03-27

申请人： Deborah Walter ,  Yanfeng Du ,  Kelly Piacsek

发明人： Deborah Walter ,  Yanfeng Du ,  Kelly Piacsek

IPC分类号： A61B6/00 ,  H05G1/60 ,  G01N23/00 ,  G21K1/12

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数据分解成一组像素的计算机，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：US20070092066A1

公开(公告)日：2007-04-26

申请号：US11163496

申请日：2005-10-20

申请人： J. Tkaczyk ,  Deborah Walter ,  Xiaoye Wu ,  Brian Bales ,  James Leblanc ,  Yanfeng Du

发明人： J. Tkaczyk ,  Deborah Walter ,  Xiaoye Wu ,  Brian Bales ,  James Leblanc ,  Yanfeng Du

IPC分类号： G21K3/00

CPC分类号： G21K1/10

摘要： A bowtie filter is constructed to have a fluidic envelope filled with attenuating fluid and a displacement insert that can present various x-ray attenuation profiles during a scan. The insert is designed to displace the attenuating fluid to achieve a denied attenuating or filtering profile. The insert can be rotated, twisted, moved, and otherwise contorted within the fluidic envelope as needed during the course of a scan. As the angle, position and shape of the zombie is changed, the x-ray profile of the filter changes. The insert may have a default shape when at rest, but can have its shape changed when external forces are placed thereon. As x-ray filtering needs change during the course of the scan, the insert can be compressed, stretched, and/or contorted to achieve additional filtering profiles.

摘要翻译： 弓形过滤器被构造成具有填充有衰减流体的流体信封和可在扫描期间呈现各种x射线衰减分布的位移插入件。 插入件被设计成使衰减流体移位以实现被拒绝的衰减或过滤轮廓。 在扫描过程中，插入物可以根据需要旋转，扭转，移动，并且在流体封套内扭曲。 随着僵尸的角度，位置和形状的改变，过滤器的X射线轮廓也会改变。 当静止时，插入件可以具有默认形状，但是当外力在其上放置时，其形状可以改变。 由于X射线过滤在扫描过程中需要更改，所以插入物可以被压缩，拉伸和/或扭转以实现额外的过滤轮廓。

公开(公告)号：US07583779B2

公开(公告)日：2009-09-01

申请号：US10904716

申请日：2004-11-24

申请人： J. Eric Tkaczyk ,  Deborah Walter ,  Yanfeng Du

发明人： J. Eric Tkaczyk ,  Deborah Walter ,  Yanfeng Du

IPC分类号： A61B6/00

CPC分类号： A61B6/032 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/5258 ,  A61B6/542 ,  G01N2223/419 ,  G01N2223/423 ,  G06T11/006

摘要： A system and method are disclosed for reconstructing contrast-enhanced CT images that are substantially free of beam-hardening artifacts. An imaging system includes a radiation source configured to project radiation toward an object to be scanned and an energy discriminating detector assembly having a plurality of detector elements and configured to detect radiation emitted by the radiation source and attenuated by the object to be scanned. The imaging system also includes computer programmed to count a number of photons detected by each detector element and associate an energy value to each counted photon and determine a material composition of a CT view from the number of photons counted and the energy value associated with each counted photon. The computer is also programmed to apply a weighting to the CT view based on the material composition of the CT view and reconstruct an image with differential weighting based on the weighting of the CT view.

摘要翻译： 公开了一种系统和方法，用于重建基本上没有束固化假象的对比度增强的CT图像。 成像系统包括被配置为向待扫描的物体投射辐射的辐射源，以及具有多个检测器元件并被配置为检测由辐射源发射并被被扫描物体衰减的辐射的能量鉴别检测器组件。 成像系统还包括被编程为对每个检测器元件检测到的数量的光子进行计数的计算机，并将能量值与每个计数光子相关联并且根据所计数的光子数量和与每个计数相关联的能量值确定CT视图的材料组成 光子。 计算机还被编程为基于CT视图的材料组成对CT视图应用加权，并且基于CT视图的加权重建具有差分加权的图像。

公开(公告)号：US20060109949A1

公开(公告)日：2006-05-25

申请号：US10904716

申请日：2004-11-24

申请人： J. Tkaczyk ,  Deborah Walter ,  Yanfeng Du

发明人： J. Tkaczyk ,  Deborah Walter ,  Yanfeng Du

IPC分类号： H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

CPC分类号： A61B6/032 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/5258 ,  A61B6/542 ,  G01N2223/419 ,  G01N2223/423 ,  G06T11/006

摘要： A system and method are disclosed for reconstructing contrast-enhanced CT images that are substantially free of beam-hardening artifacts. An imaging system includes a radiation source configured to project radiation toward an object to be scanned and an energy discriminating detector assembly having a plurality of detector elements and configured to detect radiation emitted by the radiation source and attenuated by the object to be scanned. The imaging system also includes computer programmed to count a number of photons detected by each detector element and associate an energy value to each counted photon and determine a material composition of a CT view from the number of photons counted and the energy value associated with each counted photon. The computer is also programmed to apply a weighting to the CT view based on the material composition of the CT view and reconstruct an image with differential weighting based on the weighting of the CT view.

摘要翻译： 公开了一种系统和方法，用于重建基本上没有束固化假象的对比度增强的CT图像。 成像系统包括被配置为向待扫描的物体投射辐射的辐射源，以及具有多个检测器元件并被配置为检测由辐射源发射并被被扫描物体衰减的辐射的能量鉴别检测器组件。 成像系统还包括被编程为对每个检测器元件检测到的数量的光子进行计数的计算机，并将能量值与每个计数光子相关联并且根据所计数的光子数量和与每个计数相关联的能量值确定CT视图的材料组成 光子。 计算机还被编程为基于CT视图的材料组成对CT视图应用加权，并且基于CT视图的加权重建具有差分加权的图像。

公开(公告)号：US20100327173A1

公开(公告)日：2010-12-30

申请号：US12494257

申请日：2009-06-29

申请人： Charles Gerard Woychik ,  James Rose ,  John Eric Tkaczyk ,  Jonathan Short ,  Yanfeng Du

发明人： Charles Gerard Woychik ,  James Rose ,  John Eric Tkaczyk ,  Jonathan Short ,  Yanfeng Du

IPC分类号： G01T1/24 ,  H01L21/50

CPC分类号： H01L27/14618 ,  H01L23/3677 ,  H01L23/42 ,  H01L24/48 ,  H01L25/16 ,  H01L2224/48091 ,  H01L2224/48227 ,  H01L2224/73253 ,  H01L2924/00014 ,  H01L2924/01078 ,  H01L2924/01079 ,  H01L2924/14 ,  H01L2924/15311 ,  H01L2924/1532 ,  H01L2224/45099 ,  H01L2224/45015 ,  H01L2924/207

摘要： A detector module comprises: a direct conversion crystal for converting incident photons into electrical signals, the direct conversion crystal having an anode layer deposited on a first surface and a cathode layer deposited on a second surface; a redistribution layer deposited on the anode layer, the redistribution layer configured to adapt a pad array layout of the direct conversion crystal to a predetermined lead pattern; an integrated circuit in electrical communication with the direct conversion crystal; and a plurality of input/output electrical paths connected to the redistribution layer to provide connectivity between the imaging module and another level of interconnect.

摘要翻译： 检测器模块包括：用于将入射光子转换成电信号的直接转换晶体，所述直接转换晶体具有淀积在第一表面上的阳极层和沉积在第二表面上的阴极层; 沉积在所述阳极层上的再分配层，所述再分配层被配置为使所述直接转换晶体的焊盘阵列布局适应于预定的引线图案; 与直接转换晶体进行电气通信的集成电路; 以及连接到再分配层的多个输入/输出电路径，以提供成像模块和另一级别的互连之间的连接。

公开(公告)号：US07734076B2

公开(公告)日：2010-06-08

申请号：US11609262

申请日：2006-12-11

申请人： Yanfeng Du ,  John Eric Tkaczyk

发明人： Yanfeng Du ,  John Eric Tkaczyk

IPC分类号： G06K9/00 ,  A61B6/00

CPC分类号： A61B6/4241 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/482 ,  A61B6/583

摘要： A diagnostic imaging system in an example includes a high frequency electromagnetic energy source, a detector, a data acquisition system (DAS), and a computer. The high frequency electromagnetic energy source emits a beam of high frequency electromagnetic energy toward an object to be imaged. The detector receives high frequency electromagnetic energy emitted by the high frequency electromagnetic energy source. The DAS is operably connected to the detector and programmed to employ a threshold to trigger a filter operation on a pixel, in a basis material decomposition (BMD) image of a plurality of BMD images, through comparison of an actual noise ratio between a pair of BMD images, of the plurality of BMD images, to a theoretical BMD noise ratio value. The computer is programmed to employ a correlation in noise distribution of the plurality of BMD images to reduce image noise in the plurality of BMD images.

摘要翻译： 示例中的诊断成像系统包括高频电磁能量源，检测器，数据采集系统（DAS）和计算机。 高频电磁能源朝向要成像的物体发射高频电磁能束。 检测器接收高频电磁能源发出的高频电磁能。 DAS可操作地连接到检测器，并且被编程为通过比较多个BMD图像中的实际噪声比，在多个BMD图像的基础材料分解（BMD）图像中采用阈值来触发像素上的滤波器操作 多个BMD图像中的BMD图像达到理论BMD噪声比值。 计算机被编程为在多个BMD图像的噪声分布中采用相关性，以减少多个BMD图像中的图像噪声。

公开(公告)号：US07696483B2

公开(公告)日：2010-04-13

申请号：US11837328

申请日：2007-08-10

申请人： John Eric Tkaczyk ,  Samit Kumar Basu ,  Wen Li ,  Yanfeng Du

发明人： John Eric Tkaczyk ,  Samit Kumar Basu ,  Wen Li ,  Yanfeng Du

IPC分类号： G01T1/24

CPC分类号： G01T1/171 ,  G01T1/247 ,  G01T1/249

摘要： A photon-counting detector includes a direct conversion material and a data acquisition system with a first comparator having a first signal level threshold indicative of a noise level of a spectrum of photons, the first comparator configured to output a count when the electrical signal level exceeds the first signal level threshold, and a second comparator having a second signal level threshold indicative of the maximum energy of the spectrum of photons, the second comparator configured to output a count when the electrical signal exceeds the second signal level threshold where a photon count is determined based on the counts from the first and second comparators.

摘要翻译： 光子计数检测器包括直接转换材料和具有第一比较器的数据采集系统，第一比较器具有指示光子谱的噪声电平的第一信号电平阈值，第一比较器被配置为当电信号电平超过时输出计数 第一信号电平阈值和具有指示光子谱的最大能量的第二信号电平阈值的第二比较器，第二比较器被配置为当电信号超过第二信号电平阈值时输出计数，其中光子计数是 基于来自第一和第二比较器的计数确定。

公开(公告)号：US20090128216A1

公开(公告)日：2009-05-21

申请号：US12199020

申请日：2008-08-27

申请人： Naresh Kesavan Rao ,  Brian David Yanoff ,  Yanfeng Du ,  Jianjun Guo

发明人： Naresh Kesavan Rao ,  Brian David Yanoff ,  Yanfeng Du ,  Jianjun Guo

IPC分类号： G06G7/18

CPC分类号： G06G7/18 ,  A61B6/037 ,  G01T1/247 ,  G01T1/249 ,  G01T1/2985

摘要： An event time stamping system comprising a current source, an integrator comprising an input and an output, and configured to output a voltage proportional to the length of time the current source is coupled to the input, and one or more switches configured to couple the current source to the input of the integrator upon receipt of an event signal and configured to de-couple the current source from the input of the integrator upon receipt of a control trigger. The system further comprises a lock-out signal generator configured to generate a lock-out signal, and a controller coupled to the one or more switches, wherein the controller is configured to generate the control trigger based on the lock-out signal to ensure a minimum integration time.

摘要翻译： 一种事件时间戳系统，包括电流源，积分器，包括输入和输出，并且被配置为输出与电流源耦合到输入端的时间长度成比例的电压;以及一个或多个开关，被配置为耦合电流 在接收到事件信号时将其提供给积分器的输入，并且被配置为在接收到控制触发时将积分器的输入与当前源解耦。 所述系统还包括被配置为产生锁定信号的锁定信号发生器和耦合到所述一个或多个开关的控制器，其中所述控制器被配置为基于所述锁定信号产生所述控制触发，以确保 最小积分时间。