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公开(公告)号：US20130108009A1
公开(公告)日：2013-05-02
申请号：US13701232
申请日：2011-06-03
申请人： Shinichi Kojima , Fumito Watanabe , Yasutaka Konno , Yushi Tsubota , Yukiko Ueki
IPC分类号： G01N23/04
CPC分类号： G01N23/046 , A61B6/032 , A61B6/5205 , A61B6/5258 , A61B6/5282 , A61B6/583 , A61B6/585
摘要： An X-ray CT apparatus includes: an X-ray generating unit configured to generate an X ray; an X-ray detecting unit including a plurality of X-ray detectors, each configured to detect the X ray generated from the X-ray generating unit and transmitted through an object; and an image generating unit configured to correct and reconstruct signals acquired by the X-ray detecting unit. While crosstalk correction of a plurality of the X-ray detectors is performed at the image generating unit, correction of a locally attenuating component is previously performed and correction of a whole component of the crosstalk is performed when the image is reconstructed.
摘要翻译： X射线CT装置包括：X射线产生单元，被配置为产生X射线; X射线检测单元，其包括多个X射线检测器，每个X射线检测器被配置为检测从X射线产生单元产生并透过物体的X射线; 以及图像生成单元，被配置为校正和重建由所述X射线检测单元获取的信号。 虽然在图像生成单元执行多个X射线检测器的串扰校正，但是预先执行局部衰减分量的校正，并且当重构图像时执行串扰的整个分量的校正。
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公开(公告)号：US09482629B2
公开(公告)日：2016-11-01
申请号：US13701232
申请日：2011-06-03
申请人： Shinichi Kojima , Fumito Watanabe , Hironori Ueki , Yasutaka Konno , Yushi Tsubota , Yukiko Ueki
IPC分类号： G01N23/083 , G01N23/04 , A61B6/03 , A61B6/00
CPC分类号： G01N23/046 , A61B6/032 , A61B6/5205 , A61B6/5258 , A61B6/5282 , A61B6/583 , A61B6/585
摘要： An X-ray CT apparatus includes: an X-ray generating unit configured to generate an X ray; an X-ray detecting unit including a plurality of X-ray detectors, each configured to detect the X ray generated from the X-ray generating unit and transmitted through an object; and an image generating unit configured to correct and reconstruct signals acquired by the X-ray detecting unit. While crosstalk correction of a plurality of the X-ray detectors is performed at the image generating unit, correction of a locally attenuating component is previously performed and correction of a whole component of the crosstalk is performed when the image is reconstructed.
摘要翻译： X射线CT装置包括：X射线产生单元，被配置为产生X射线; X射线检测单元，其包括多个X射线检测器，每个X射线检测器被配置为检测从X射线产生单元产生并透过物体的X射线; 以及图像生成单元，被配置为校正和重建由所述X射线检测单元获取的信号。 虽然在图像生成单元执行多个X射线检测器的串扰校正，但是预先执行局部衰减分量的校正，并且当重构图像时执行串扰的整个分量的校正。
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公开(公告)号：US08761483B2
公开(公告)日：2014-06-24
申请号：US13390752
申请日：2010-08-12
申请人： Atsuro Suzuki , Fumito Watanabe , Hironori Ueki , Yasutaka Konno , Shinichi Kojima , Yushi Tsubota
发明人： Atsuro Suzuki , Fumito Watanabe , Hironori Ueki , Yasutaka Konno , Shinichi Kojima , Yushi Tsubota
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/4021 , A61B6/4291 , A61B6/4411 , A61B6/585 , A61B6/587
摘要： In a state where a subject 5 is not present, a pre-processing unit 7 changes the focal spot position that becomes the position of an X-ray tube 2, acquires the X-ray incidence rate of each detection module at each focal spot position, approximates the X-ray incidence rate of each detection module by the X-ray incidence rate of a module in which a reference detector is present, and stores the coefficient of an approximate polynomial in a storage unit 8. When a scanning of the subject 5 is performed, the X-ray incidence rate of each detection module is calculated using the X-ray incidence rate of the module in which the reference detector is present and the stored coefficient, and sensitivity correction data relating to each focal spot position is obtained using the calculated X-ray incidence rate when the scanning of the subject is performed.
摘要翻译： 在不存在对象5的状态下，预处理单元7改变成为X射线管2的位置的焦点位置，获取每个焦点位置处的每个检测模块的X射线入射率 通过存在基准检测器的模块的X射线入射率近似每个检测模块的X射线入射率，并将近似多项式的系数存储在存储单元8中。当对象的扫描 如图5所示，使用存在基准检测器的模块的X射线入射率和存储的系数来计算各检测模块的X射线入射率，得到与各焦斑位置有关的灵敏度校正数据 当进行被摄体的扫描时，使用计算出的X射线发生率。
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公开(公告)号：US08774350B2
公开(公告)日：2014-07-08
申请号：US13391074
申请日：2010-08-19
申请人： Yushi Tsubota , Fumito Watanabe , Hironori Ueki , Yasutaka Konno , Shinichi Kojima , Atsuro Suzuki
发明人： Yushi Tsubota , Fumito Watanabe , Hironori Ueki , Yasutaka Konno , Shinichi Kojima , Atsuro Suzuki
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/06 , A61B6/4021 , A61B6/4208 , A61B6/58
摘要： Scattered X-rays scattered by an object or a structure enter in a detector (a shift detector) for detecting the positional shift of an X-ray focal point and become a noise source, thereby deteriorating the positional shift detection precision. In particular, the estimation of the dose of scattered X-rays originating from the object is difficult prior to the measurement, and correction of the scattered X-rays is important in order to precisely calculate the positional shift of the X-ray focal point. In order to address this drawback, according to the present invention, a scattered X-ray detector 6 is provided which measures the dose of scattered rays entering in a shift detector 5 for detecting the positional shift of an X-ray focal point 9, and has a function that the output by the shift detector 5 is corrected using the scattered ray dose measured by the scattered X-ray detector.
摘要翻译： 由物体或结构散射的散射的X射线进入用于检测X射线焦点的位置偏移并成为噪声源的检测器（移位检测器），从而劣化位置偏移检测精度。 特别地，在测量之前难以估计源自物体的散射X射线的剂量，并且为了精确地计算X射线焦点的位置偏移，散射X射线的校正是重要的。 为了解决这个缺陷，根据本发明，提供一种散射X射线检测器6，其测量进入用于检测X射线焦点9的位置偏移的换档检测器5中的散射光线的剂量， 具有使用由散射X射线检测器测定的散射光线剂量校正移位检测器5的输出的功能。
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公开(公告)号：US20120177272A1
公开(公告)日：2012-07-12
申请号：US13390752
申请日：2010-08-12
申请人： Atsuro Suzuki , Fumito Watanabe , Hironori Ueki , Yasutaka Konno , Shinichi Kojima , Yushi Tsubota
发明人： Atsuro Suzuki , Fumito Watanabe , Hironori Ueki , Yasutaka Konno , Shinichi Kojima , Yushi Tsubota
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/4021 , A61B6/4291 , A61B6/4411 , A61B6/585 , A61B6/587
摘要： In a state where a subject 5 is not present, a pre-processing unit 7 changes the focal spot position that becomes the position of an X-ray tube 2, acquires the X-ray incidence rate of each detection module at each focal spot position, approximates the X-ray incidence rate of each detection module by the X-ray incidence rate of a module in which a reference detector is present, and stores the coefficient of an approximate polynomial in a storage unit 8. When a scanning of the subject 5 is performed, the X-ray incidence rate of each detection module is calculated using the X-ray incidence rate of the module in which the reference detector is present and the stored coefficient, and sensitivity correction data relating to each focal spot position is obtained using the calculated X-ray incidence rate when the scanning of the subject is performed.
摘要翻译： 在不存在对象5的状态下，预处理单元7改变成为X射线管2的位置的焦点位置，获取每个焦点位置处的每个检测模块的X射线入射率 通过存在基准检测器的模块的X射线入射率近似每个检测模块的X射线入射率，并将近似多项式的系数存储在存储单元8中。当对象的扫描 如图5所示，使用存在基准检测器的模块的X射线入射率和存储的系数来计算各检测模块的X射线入射率，得到与各焦斑位置有关的灵敏度校正数据 当进行被摄体的扫描时，使用计算出的X射线发生率。
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公开(公告)号：US20120170708A1
公开(公告)日：2012-07-05
申请号：US13391074
申请日：2010-08-19
申请人： Yushi Tsubota , Fumito Watanabe , Hironori Ueki , Yasutaka Konno , Shinichi Kojima , Atsuro Suzuki
发明人： Yushi Tsubota , Fumito Watanabe , Hironori Ueki , Yasutaka Konno , Shinichi Kojima , Atsuro Suzuki
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/06 , A61B6/4021 , A61B6/4208 , A61B6/58
摘要： Scattered X-rays scattered by an object or a structure enter in a detector (a shift detector) for detecting the positional shift of an X-ray focal point and become a noise source, thereby deteriorating the positional shift detection precision. In particular, the estimation of the dose of scattered X-rays originating from the object is difficult prior to the measurement, and correction of the scattered X-rays is important in order to precisely calculate the positional shift of the X-ray focal point. In order to address this drawback, according to the present invention, a scattered X-ray detector 6 is provided which measures the dose of scattered rays entering in a shift detector 5 for detecting the positional shift of an X-ray focal point 9, and has a function that the output by the shift detector 5 is corrected using the scattered ray dose measured by the scattered X-ray detector.
摘要翻译： 由物体或结构散射的散射的X射线进入用于检测X射线焦点的位置偏移并成为噪声源的检测器（移位检测器），从而劣化位置偏移检测精度。 特别地，在测量之前难以估计源自物体的散射X射线的剂量，并且为了精确地计算X射线焦点的位置偏移，散射X射线的校正是重要的。 为了解决这个缺陷，根据本发明，提供一种散射X射线检测器6，其测量进入用于检测X射线焦点9的位置偏移的换档检测器5中的散射光线的剂量， 具有使用由散射X射线检测器测定的散射光线剂量校正移位检测器5的输出的功能。
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公开(公告)号：US09508142B2
公开(公告)日：2016-11-29
申请号：US14422788
申请日：2013-08-07
CPC分类号： G06T7/0012 , A61B6/03 , A61B6/4233 , A61B6/5258 , G01N23/046 , G06T5/005 , G06T2207/10081 , G06T2207/30004
摘要： An X-ray detector (320), configured to have X-ray detecting elements (322) arranged in array, detects the intensity of X-rays that are radiated from the X-ray tube (311) and have passed through a subject (500). A data processing device (420) executes steps of: arranging scan data, which is based on the intensity of X-rays, in an array sequence of the X-ray detecting elements (322) or in a time sequence, to detect an anomalous scan data; associating a weight greater than “1” with scan data adjacent to the anomalous scan data, and associating a weight of “1” with other imaging data; calculating an update amount of a pixel vector that reflects these weights; and performing an iterative operation using the update amount to generate an X-ray CT image of the subject (500).
摘要翻译： 被配置为具有排列成阵列的X射线检测元件（322）的X射线检测器（320），检测从X射线管（311）辐射并穿过被检体的X射线的强度（ 500）。 数据处理装置（420）执行以下步骤：将基于X射线强度的扫描数据排列在X射线检测元件（322）的阵列序列中，或者按时间顺序排列，以检测异常 扫描数据; 将大于“1”的重量与与异常扫描数据相邻的扫描数据相关联，并将“1”的权重与其他成像数据相关联; 计算反映这些权重的像素向量的更新量; 以及使用所述更新量执行迭代操作以生成所述对象（500）的X射线CT图像。
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公开(公告)号：US20150221085A1
公开(公告)日：2015-08-06
申请号：US14422788
申请日：2013-08-07
CPC分类号： G06T7/0012 , A61B6/03 , A61B6/4233 , A61B6/5258 , G01N23/046 , G06T5/005 , G06T2207/10081 , G06T2207/30004
摘要： An X-ray detector (320), configured to have X-ray detecting elements (322) arranged in array, detects the intensity of X-rays that are radiated from the X-ray tube (311) and have passed through a subject (500). A data processing device (420) executes steps of arranging scan data, which is based on the intensity of X-rays, in an array sequence of the X-ray detecting elements (322) or in a time sequence, to detect an anomalous scan data; associating a weight greater than “1” with scan data adjacent to the anomalous scan data, and associating a weight of “1” with other imaging data; calculating an update amount of a pixel vector that reflects these weights; and performing an iterative operation using the update amount to generate an X-ray CT image of the subject (500).
摘要翻译： 被配置为具有排列成阵列的X射线检测元件（322）的X射线检测器（320），检测从X射线管（311）辐射并穿过被检体的X射线的强度（ 500）。 数据处理装置（420）执行将X射线强度的扫描数据排列在X射线检测元件（322）的阵列序列中，或按时间顺序进行的步骤，以检测异常扫描 数据; 将大于“1”的重量与与异常扫描数据相邻的扫描数据相关联，并将“1”的权重与其他成像数据相关联; 计算反映这些权重的像素向量的更新量; 以及使用所述更新量执行迭代操作以生成所述对象（500）的X射线CT图像。
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公开(公告)号：US20150311837A1
公开(公告)日：2015-10-29
申请号：US14693247
申请日：2015-04-22
申请人： Shinichi Kojima , Katsuhisa Furuse
发明人： Shinichi Kojima , Katsuhisa Furuse
CPC分类号： G01D5/24485 , G01D3/024 , G01D5/145 , G01D5/247
摘要： An angle detector includes an intersection phase detector to compare each pair of multiple sensor signals or multiple sensor processed signals generate and output each intersection phase detection signal indicating a phase at which the signal level difference of the each pair is a first maximum hysteresis error after signal levels of signals of the each pair match, an intersection level detector to detect each intersection level and generate and output multiple intersection level signals indicating the detected intersection level, a signal selector to single out a selection signal of the either of the multiple sensor signals or the multiple sensor processed signals; a phase detector to detect that a signal level of the selection signal selected by the signal selector has reached a threshold level and a threshold level adjuster to adjust the threshold level based on the intersection level signal and the first maximum hysteresis error.
摘要翻译： 角度检测器包括交叉相位检测器，用于比较每对多个传感器信号，或者多个传感器处理信号产生并输出每个交点相位检测信号，每个相位检测信号指示每一对的信号电平差是信号后的第一最大滞后误差 每对信号的电平匹配，交叉点电平检测器，用于检测每个交叉电平，并产生并输出指示所检测的交叉电平的多个交叉电平信号;信号选择器，用于单独选择多个传感器信号的选择信号; 多传感器处理信号; 相位检测器，用于检测由信号选择器选择的选择信号的信号电平已经达到阈值电平;以及阈值电平调节器，基于交点电平信号和第一最大滞后误差来调整阈值电平。
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公开(公告)号：US08692204B2
公开(公告)日：2014-04-08
申请号：US13453902
申请日：2012-04-23
IPC分类号： G01T1/20
CPC分类号： H01J37/3174 , B82Y10/00 , B82Y40/00 , H01J37/244 , H01J2237/24528 , H01J2237/30438 , H01J2237/31798
摘要： One embodiment disclosed relates a method of detecting a patterned electron beam. The patterned electron beam is focused onto a grating with a pattern that has a same pitch as the patterned electron beam. Electrons of the patterned electron beam that pass through the grating un-scattered are detected. Another embodiment relates to focusing the patterned electron beam onto a grating with a pattern that has a second pitch that is different than a first pitch of the patterned electron beam. Electrons of the patterned electron beam that pass through the grating form a Moiré pattern that is detected using a position-sensitive detector. Other embodiments, aspects and features are also disclosed.
摘要翻译： 公开的一个实施例涉及一种检测图案化电子束的方法。 图案化电子束被聚焦到具有与图案化电子束相同的间距的图案的光栅上。 检测通过光栅不分散的图案化电子束的电子。 另一个实施例涉及将图案化电子束聚焦到具有不同于图案化电子束的第一间距的第二间距的图案的光栅上。 通过光栅的图案化电子束的电子形成使用位置敏感检测器检测的莫尔图案。 还公开了其它实施例，方面和特征。
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