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1.发明申请Method of and system for X-ray spectral correction in multi-energy computed tomography 有权多能计算机断层扫描中X射线光谱校正的方法和系统公开(公告)号：US20060023844A1
公开(公告)日：2006-02-02
申请号：US10899775
申请日：2004-07-27
IPC分类号： H05G1/00
CPC分类号： G01N23/046 , G01N2223/419 , G01T1/185
摘要： A method of and a system for spectral correction in multi-energy computed tomography are provided to correct reconstructed images, including high-energy CT images and Z (effective atomic number) images, for spectral variations, which include time variations on a scanner due to HVPS drift and scanner to scanner variations due to the beamline component differences. The method uses a copper filter mounted on the detector array for tracking the spectral changes. The method comprises: generating copper ratios; computing working air tables; calculating scales and offsets; and correcting high-energy CT images and Z images using calculated scales and offsets. The method further includes an off-line calibration procedure to generate necessary parameters for the online correction.
摘要翻译： 提供了一种用于多能量计算机断层摄影中的光谱校正的方法和系统，用于校正重建图像，包括高能CT图像和Z（有效原子序数）图像，用于光谱变化，包括扫描仪上的时间变化，由于 HVPS漂移和扫描仪由于束线分量差异而导致扫描仪变化。 该方法使用安装在检测器阵列上的铜过滤器来跟踪光谱变化。 该方法包括：产生铜比; 计算工作台面; 计算比例和偏移量; 并使用计算的比例和偏移校正高能CT图像和Z图像。 该方法还包括离线校准程序以产生用于在线校正的必要参数。
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2.发明授权Method of and system for X-ray spectral correction in multi-energy computed tomography 有权多能计算机断层扫描中X射线光谱校正的方法和系统公开(公告)号：US07224763B2
公开(公告)日：2007-05-29
申请号：US10899775
申请日：2004-07-27
IPC分类号： G01N23/00
CPC分类号： G01N23/046 , G01N2223/419 , G01T1/185
摘要： A method of and a system for spectral correction in multi-energy computed tomography are provided to correct reconstructed images, including high-energy CT images and Z (effective atomic number) images, for spectral variations, which include time variations on a scanner due to HVPS drift and scanner to scanner variations due to the beamline component differences. The method uses a copper filter mounted on the detector array for tracking the spectral changes. The method comprises: generating copper ratios; computing working air tables; calculating scales and offsets; and correcting high-energy CT images and Z images using calculated scales and offsets. The method further includes an off-line calibration procedure to generate necessary parameters for the online correction.
摘要翻译： 提供了一种用于多能量计算机断层摄影中的光谱校正的方法和系统，用于校正重建图像，包括高能CT图像和Z（有效原子序数）图像，用于光谱变化，包括扫描仪上的时间变化，由于 HVPS漂移和扫描仪由于束线分量差异而导致扫描仪变化。 该方法使用安装在检测器阵列上的铜过滤器来跟踪光谱变化。 该方法包括：产生铜比; 计算工作台面; 计算比例和偏移量; 并使用计算的比例和偏移校正高能CT图像和Z图像。 该方法还包括离线校准程序以产生用于在线校正的必要参数。
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3.发明申请Method of and system for extracting 3D bag images from continuously reconstructed 2D image slices in computed tomography 有权在计算机断层扫描中从连续重建的2D图像切片中提取3D袋图像的方法和系统公开(公告)号：US20050276468A1
公开(公告)日：2005-12-15
申请号：US10864619
申请日：2004-06-09
申请人： Zhengrong Ying , Chitra Subramanian , Anuradha Aiyer , Nima Shokrollahi , Govindarajan Srinivasan , Carl Crawford
发明人： Zhengrong Ying , Chitra Subramanian , Anuradha Aiyer , Nima Shokrollahi , Govindarajan Srinivasan , Carl Crawford
CPC分类号： G01T1/2985 , G01V5/0041 , G01V5/005 , G06K9/4638 , G06K2209/09 , G06K2209/40 , G06T7/11 , G06T7/136 , G06T2207/10081 , G06T2207/30112
摘要： A method of and a system for extracting 3D bag images from continuously reconstructed 2D image slices are provided. The method detects the boundaries of baggage in the reconstructed images, and provides better flexibilities for threat detection and displaying. The method comprises detecting starting and ending slices using multiple slices, counting bag slices, splitting 3D bag images when maximum number of slices of a 3D bag image is reached, and creating overlapping slices for the split 3D bag images.
摘要翻译： 提供了一种用于从连续重建的2D图像切片中提取3D袋图像的方法和系统。 该方法检测重建图像中行李的边界，为威胁检测和显示提供更好的灵活性。 该方法包括使用多个切片检测开始和结束切片，计数袋切片，在达到3D袋图像的最大切片数量时分割3D袋图像，以及为分割的3D袋图像创建重叠切片。
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公开(公告)号：US09121957B2
公开(公告)日：2015-09-01
申请号：US13123833
申请日：2008-10-14
申请人： Ram C. Naidu , Chitra Subramanian , Sergey B. Simanovsky , Zhengrong Ying , Dong-Yueh Liang , Douglas Q. Abraham
发明人： Ram C. Naidu , Chitra Subramanian , Sergey B. Simanovsky , Zhengrong Ying , Dong-Yueh Liang , Douglas Q. Abraham
IPC分类号： G01V5/00
CPC分类号： G01V5/0041 , G01V5/0016 , G01V5/005
摘要： Radiation flux can be adjusted “on the fly” as an object (204) is being scanned in a security examination apparatus. Adjustments are made to the radiation flux based upon radiation incident on a first radiation detector (226) in an upstream portion (233) of an examination region. The object under examination is thus exposed to different radiation flux in coordination with a downstream motion (235) of the object relative to a second radiation detector (228). The radiation flux is adjusted so that a sufficient number of x-rays (that traverse the object) are incident on the second radiation detector. Images of the object can then be generated based upon data from the second radiation detector, where these images are thus of a desired/higher quality.
摘要翻译： 随着物体（204）在安全检查装置中被扫描，可以“飞行地”调整辐射通量。 基于入射到检查区域的上游部分（233）中的第一辐射检测器（226）上的辐射对辐射通量进行调整。 因此，被检查物体与物体相对于第二辐射检测器（228）的下游运动（235）协调地暴露于不同的辐射通量。 调整辐射通量使得足够数量的X射线（穿过物体）入射到第二辐射探测器上。 然后可以基于来自第二辐射检测器的数据生成对象的图像，其中这些图像因此具有期望/更高质量。
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5.发明授权Method of and system for extracting 3D bag images from continuously reconstructed 2D image slices in computed tomography 有权在计算机断层扫描中从连续重建的2D图像切片中提取3D袋图像的方法和系统公开(公告)号：US07327853B2
公开(公告)日：2008-02-05
申请号：US10864619
申请日：2004-06-09
申请人： Zhengrong Ying , Chitra Subramanian , Anuradha Aiyer , Nima Shokrollahi , Govindarajan T. Srinivasan , Carl R. Crawford
发明人： Zhengrong Ying , Chitra Subramanian , Anuradha Aiyer , Nima Shokrollahi , Govindarajan T. Srinivasan , Carl R. Crawford
CPC分类号： G01T1/2985 , G01V5/0041 , G01V5/005 , G06K9/4638 , G06K2209/09 , G06K2209/40 , G06T7/11 , G06T7/136 , G06T2207/10081 , G06T2207/30112
摘要： A method of and a system for extracting 3D bag images from continuously reconstructed 2D image slices are provided. The method detects the boundaries of baggage in the reconstructed images, and provides better flexibilities for threat detection and displaying. The method comprises detecting starting and ending slices using multiple slices, counting bag slices, splitting 3D bag images when maximum number of slices of a 3D bag image is reached, and creating overlapping slices for the split 3D bag images.
摘要翻译： 提供了一种用于从连续重建的2D图像切片中提取3D袋图像的方法和系统。 该方法检测重建图像中行李的边界，为威胁检测和显示提供更好的灵活性。 该方法包括使用多个切片检测开始和结束切片，计数袋切片，在达到3D袋图像的最大切片数量时分割3D袋图像，以及为分割的3D袋图像创建重叠切片。
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公开(公告)号：US20110200167A1
公开(公告)日：2011-08-18
申请号：US13123833
申请日：2008-10-14
申请人： Ram C. Naidu , Chitra Subramanian , Sergey B. Simanovsky , Zhengrong Ying , Dong-Yueh Liang , Douglas Q. Abraham
发明人： Ram C. Naidu , Chitra Subramanian , Sergey B. Simanovsky , Zhengrong Ying , Dong-Yueh Liang , Douglas Q. Abraham
CPC分类号： G01V5/0041 , G01V5/0016 , G01V5/005
摘要： Radiation flux can be adjusted “on the fly” as an object (204) is being scanned in a security examination apparatus. Adjustments are made to the radiation flux based upon radiation incident on a first radiation detector (226) in an upstream portion (233) of an examination region. The object under examination is thus exposed to different radiation flux in coordination with a downstream motion (235) of the object relative to a second radiation detector (228). The radiation flux is adjusted so that a sufficient number of x-rays (that traverse the object) are incident on the second radiation detector. Images of the object can then be generated based upon data from the second radiation detector, where these images are thus of a desired/higher quality.
摘要翻译： 随着物体（204）在安全检查装置中被扫描，可以“飞行地”调整辐射通量。 基于入射到检查区域的上游部分（233）中的第一辐射检测器（226）上的辐射对辐射通量进行调整。 因此，被检查物体与物体相对于第二辐射检测器（228）的下游运动（235）协调地暴露于不同的辐射通量。 调整辐射通量使得足够数量的X射线（穿过物体）入射到第二辐射探测器上。 然后可以基于来自第二辐射检测器的数据生成对象的图像，其中这些图像因此具有期望/更高质量。
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公开(公告)号：US09047969B2
公开(公告)日：2015-06-02
申请号：US14452071
申请日：2014-08-05
CPC分类号： G11C11/1675 , G06F11/1048 , G06F11/1076 , G11C11/00 , G11C11/16 , G11C11/1673 , G11C11/1693 , G11C2013/0076 , G11C2029/0411
摘要： A method includes destructively reading bits of a spin torque magnetic random access memory and immediately writing back the original or inverted values. A detection of the majority state of the write back bits and a conditional inversion of write back bits are employed to reduce the number of write back pulses. A subsequent write command received within a specified time or before an original write operation is commenced will cause a portion of the write back pulses or the original write operation pulses to abort. Write pulses during subsequent write operations will follow the conditional inversion determined for the write back bits during destructive read.
摘要翻译： 一种方法包括破坏性地读取自旋扭矩磁随机存取存储器的位并立即写回原始值或反相值。 采用回写位的多数状态的检测和回写位的条件反转来减少回写脉冲的数量。 在指定时间内或在原始写入操作开始之前接收到的后续写入命令将导致回写脉冲的一部分或原始写入操作脉冲中止。 在后续写入操作期间的写入脉冲将遵循在破坏性读取期间为回写位确定的条件反演。
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公开(公告)号：US08811071B2
公开(公告)日：2014-08-19
申请号：US13362599
申请日：2012-01-31
IPC分类号： G11C11/00
CPC分类号： G11C11/1675 , G06F11/1048 , G06F11/1076 , G11C11/00 , G11C11/16 , G11C11/1673 , G11C11/1693 , G11C2013/0076 , G11C2029/0411
摘要： A method includes destructively reading bits of a spin torque magnetic random access memory and immediately writing back the original or inverted values. A detection of the majority state of the write back bits and a conditional inversion of write back bits are employed to reduce the number of write back pulses. A subsequent write command received within a specified time or before an original write operation is commenced will cause a portion of the write back pulses or the original write operation pulses to abort. Write pulses during subsequent write operations will follow the conditional inversion determined for the write back bits during destructive read.
摘要翻译： 一种方法包括破坏性地读取自旋扭矩磁随机存取存储器的位并立即写回原始值或反相值。 采用回写位的多数状态的检测和回写位的条件反转来减少回写脉冲的数量。 在指定时间内或在原始写入操作开始之前接收到的后续写入命令将导致回写脉冲的一部分或原始写入操作脉冲中止。 在后续写入操作期间的写入脉冲将遵循在破坏性读取期间为回写位确定的条件反演。
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公开(公告)号：US20120195112A1
公开(公告)日：2012-08-02
申请号：US13362599
申请日：2012-01-31
IPC分类号： G11C11/16
CPC分类号： G11C11/1675 , G06F11/1048 , G06F11/1076 , G11C11/00 , G11C11/16 , G11C11/1673 , G11C11/1693 , G11C2013/0076 , G11C2029/0411
摘要： A method includes destructively reading bits of a spin torque magnetic random access memory and immediately writing back the original or inverted values. A detection of the majority state of the write back bits and a conditional inversion of write back bits are employed to reduce the number of write back pulses. A subsequent write command received within a specified time or before an original write operation is commenced will cause a portion of the write back pulses or the original write operation pulses to abort. Write pulses during subsequent write operations will follow the conditional inversion determined for the write back bits during destructive read.
摘要翻译： 一种方法包括破坏性地读取自旋扭矩磁随机存取存储器的位并立即写回原始值或反相值。 采用回写位的多数状态的检测和回写位的条件反转来减少回写脉冲的数量。 在指定时间内或在原始写入操作开始之前接收到的后续写入命令将导致回写脉冲的一部分或原始写入操作脉冲中止。 在后续写入操作期间的写入脉冲将遵循在破坏性读取期间为回写位确定的条件反演。
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公开(公告)号：US20070188190A1
公开(公告)日：2007-08-16
申请号：US11737506
申请日：2007-04-19
申请人： Thomas Andre , Chitra Subramanian
发明人： Thomas Andre , Chitra Subramanian
IPC分类号： H03K19/177
CPC分类号： G11C17/18 , G11C11/1673 , G11C11/1695 , G11C11/5692 , G11C17/02
摘要： An antifuse circuit provides on a per bit basis a signal that indicates whether an MTJ (magnetic tunnel junction) antifuse has been previously programmed to a low resistance state in response to a program voltage. A sense amplifier provides the resistance state signal. A plurality of reference magnetic tunnel junctions are coupled in parallel and to the sense amplifier, each having a resistance within a range to provide a collective resistance that can be determined by the sense amplifier to differ from each resistance state of the MTJ antifuse. A write circuit selectively provides a current sufficient to create the program voltage when the write circuit is enabled to program the antifuse magnetic tunnel junction. Upon detecting a change in resistance in the MTJ antifuse, the write circuit reduces current supplied to the antifuse. Multiple antifuses may be programmed concurrently. Gate oxide thicknesses of transistors are adjusted for optimal performance.
摘要翻译： 反熔丝电路以每比特为基础提供一个信号，该信号指示MTJ（磁性隧道结）反熔丝是否已经被预先编程为响应于编程电压的低电阻状态。 读出放大器提供电阻状态信号。 多个参考磁隧道结并联耦合到读出放大器，每个具有在一个范围内的电阻，以提供可由感测放大器确定的不同于MTJ反熔丝的每个电阻状态的集合电阻。 写入电路选择性地提供足以在写入电路被编程反熔丝磁性隧道结时产生编程电压的电流。 当检测到MTJ反熔丝中的电阻变化时，写入电路减少提供给反熔丝的电流。 多个反熔丝可以同时编程。 调整晶体管的栅极氧化物厚度以获得最佳性能。
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