公开(公告)号：US20070003006A1

公开(公告)日：2007-01-04

申请号：US11171169

申请日：2005-06-29

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

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

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

CPC分类号： G01T1/2985 ,  G01T1/241 ,  G01T1/242 ,  G01T1/243 ,  G01T1/249

摘要： A computed tomography detector module is presented. The detector module includes a substrate having a topside and a bottom side. Additionally, the detector module includes a plurality of detector layers disposed on the top side of the substrate in a direction that is substantially orthogonal to the substrate, where each of the plurality of detector layers comprises a direct conversion material configured to absorb radiation, and where each of the plurality of detector layers comprises a first side and a second side. Further, the detector module includes a plurality of pixelated anode contacts is disposed on the first side of each of the plurality of detector layers. Also, the detector module includes a common cathode contact is disposed on the second side of each of the plurality of detector layers.

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：US20080304618A1

公开(公告)日：2008-12-11

申请号：US12194072

申请日：2008-08-19

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

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

IPC分类号： A61B6/00

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.

摘要翻译： 公开了能够鉴别和直接转换的CT检测器。 检测器包括多层半导体材料，其中层具有变化的厚度。 检测器被构造成在x射线穿透方向上分段，以便优化计数率性能以及避免饱和。 检测器还包括可变像素间距和灵活的像素分组，以进一步提高计数率性能。

公开(公告)号：US20070206722A1

公开(公告)日：2007-09-06

申请号：US11745856

申请日：2007-05-08

申请人： David Hoffman ,  James LeBlanc ,  John Tkaczyk ,  Robert Senzig ,  Yanfeng Du

发明人： David Hoffman ,  James LeBlanc ,  John Tkaczyk ,  Robert Senzig ,  Yanfeng Du

IPC分类号： G01N23/083 ,  G01T1/16

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：US20070140418A1

公开(公告)日：2007-06-21

申请号：US11677963

申请日：2007-02-22

申请人： David Hoffman ,  James LeBlanc ,  John Tkaczyk ,  Robert Senzig ,  Yanfeng Du

发明人： David Hoffman ,  James LeBlanc ,  John Tkaczyk ,  Robert Senzig ,  Yanfeng Du

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

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：US20060056581A1

公开(公告)日：2006-03-16

申请号：US10939787

申请日：2004-09-13

申请人： David Hoffman ,  James LeBlanc ,  John Tkaczyk ,  Robert Senzig ,  Yanfeng Du

发明人： David Hoffman ,  James LeBlanc ,  John Tkaczyk ,  Robert Senzig ,  Yanfeng Du

IPC分类号： H05G1/60 ,  A61B6/00

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：US20070248209A1

公开(公告)日：2007-10-25

申请号：US11768775

申请日：2007-06-26

申请人： David Hoffman ,  James LeBlanc ,  John Tkaczyk ,  Robert Senzig ,  Yanfeng Du

发明人： David Hoffman ,  James LeBlanc ,  John Tkaczyk ,  Robert Senzig ,  Yanfeng Du

IPC分类号： G01N23/00

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.

摘要翻译： 公开了能够鉴别和直接转换的CT检测器。 检测器包括多层半导体材料，其中层具有变化的厚度。 检测器被构造成在x射线穿透方向上分段，以便优化计数率性能以及避免饱和。 检测器还包括可变像素间距和灵活的像素分组，以进一步提高计数率性能。

公开(公告)号：US07260174B2

公开(公告)日：2007-08-21

申请号：US10939787

申请日：2004-09-13

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

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

IPC分类号： A61B6/03 ,  G01T1/161

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.

摘要翻译： 公开了能够鉴别和直接转换的CT检测器。 检测器包括多层半导体材料，其中层具有变化的厚度。 检测器被构造成在x射线穿透方向上分段，以便优化计数率性能以及避免饱和。 检测器还包括可变像素间距和灵活的像素分组，以进一步提高计数率性能。

公开(公告)号：US20050084069A1

公开(公告)日：2005-04-21

申请号：US10687131

申请日：2003-10-16

申请人： Yanfeng Du ,  John Tkaczyk

发明人： Yanfeng Du ,  John Tkaczyk

IPC分类号： A61B6/00 ,  A61B6/03 ,  H05G1/64

CPC分类号： A61B6/583 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/405 ,  A61B6/482

摘要： A method for analyzing materials in an object includes acquiring x-ray projection data of the object at high energy and at low energy for a plurality of views. The acquired x-ray projection data is utilized in a material decomposition to determine material densities at each pixel for two selected basis materials. A composition of an object at each pixel is determined utilizing a determined mapping of material density regions for the two selected basis materials. An image indicative of the composition of the object is displayed utilizing the determined composition.

摘要翻译： 用于分析对象中的材料的方法包括以高能量和低能量获取多个视图的物体的X射线投影数据。 所获取的X射线投影数据用于材料分解以确定两个所选基础材料的每个像素处的材料密度。 使用所选择的两种材料的材料密度区域的确定的映射来确定每个像素处的对象的组成。 使用所确定的构图来显示表示对象的构图的图像。

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.