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。

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。

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。

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。

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

发明人： Shinichi Kojima ,  Fumito Watanabe ,  Hironori Ueki ,  Yasutaka Konno ,  Yushi Tsubota

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。

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

发明人： Shinichi Kojima ,  Fumito Watanabe ,  Hironori Ueki ,  Yasutaka Konno ,  Yushi Tsubota

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。