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11. 发明授权

US07260175B2 CT image producing method and X-ray CT apparatus 有权
标题翻译： CT图像制作方法和X射线CT装置
公开(公告)号：US07260175B2
公开(公告)日：2007-08-21
申请号：US11074228
申请日：2005-04-08
申请人： Akira Hagiwara , Kotoko Morikawa
发明人： Akira Hagiwara , Kotoko Morikawa
IPC分类号： G21K1/12
CPC分类号： G06T11/006
摘要： A method for producing a CT image by applying Z-filtering to axial scan data collected using a multi-row detector, wherein second axial scan data is collected at a second position Z2 to which an X-ray tube and a multi-row detector are rectilinearly moved relative to a subject to be imaged from a first position Z1 toward an end of the multi-row detector, projection data corresponding to a central portion a2 of a reconstruction field P3 near the end of the multi-row detector is extracted from the second axial scan data, and Z-filtering is applied based on the projection data of reconstruction fields P1, P2 and P3 to produce one CT image.
摘要翻译：一种通过对使用多行检测器收集的轴向扫描数据应用Z滤波来生成CT图像的方法，其中在X射线管和多行检测器的第二位置Z 2处收集第二轴扫描数据相对于要从第一位置Z 1朝向多行检测器的端部成像的被摄体被直线移动，与多行检测器的端部附近的重建场P 3的中心部分a 2相对应的投影数据从第二轴扫描数据中提取出，并且基于重构场P 1，P 2和P 3的投影数据应用Z滤波，以产生一个CT图像。

12. 发明授权

US07076019B2 Radiation computed tomography apparatus 有权
标题翻译：辐射计算机断层摄影装置
公开(公告)号：US07076019B2
公开(公告)日：2006-07-11
申请号：US10828456
申请日：2004-04-20
申请人： Akira Hagiwara , Kotoko Morikawa
发明人： Akira Hagiwara , Kotoko Morikawa
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/027 , A61B6/06 , A61B6/542 , G01N23/046 , G01N2223/419 , G01N2223/612 , G06T11/005
摘要： An X-ray CT apparatus including an X-ray tube, a detector array including a plurality of detector rows along the axis of rotation, and a reconstructing section for calculating and reconstructing tomographic image data of a subject based on the acquired projection data. The CT apparatus also includes a collimator for adjusting the emission extent of the X-rays from the X-ray tube in response to a control command, and a control section for calculating detector rows required for acquiring the projection data for use in reconstruction of a certain portion of the tomographic image data based on parameters relating to reconstruction of the tomographic image data by the reconstructing section, and outputting the control command to the collimator for emitting the X-rays to impinge upon the calculated detector rows.
摘要翻译：一种X射线CT装置，包括X射线管，包括沿着旋转轴的多个检测器行的检测器阵列，以及用于基于所获取的投影数据计算和重建被检体的断层图像数据的重建部分。 CT装置还包括：准直器，用于响应于控制命令调整来自X射线管的X射线的发射范围;以及控制部分，用于计算获取用于重建中的投影数据所需的检测器行基于由重建部分重建断层图像数据的参数的断层图像数据的某些部分，并将控制命令输出到准直仪以发射X射线以撞击所计算的检测器行。

13. 发明申请

US20050201511A1 CT image producing method and X-ray CT apparatus 有权
标题翻译： CT图像制作方法和X射线CT装置
公开(公告)号：US20050201511A1
公开(公告)日：2005-09-15
申请号：US11074228
申请日：2005-04-08
申请人： Akira Hagiwara , Kotoko Morikawa
发明人： Akira Hagiwara , Kotoko Morikawa
IPC分类号： A61B6/03 , G06T11/00 , G21K1/12 , A61B6/00 , G01N23/00 , H05G1/60
CPC分类号： G06T11/006
摘要： A method for producing a CT image by applying Z-filtering to axial scan data collected using a multi-row detector, wherein second axial scan data is collected at a second position Z2 to which an X-ray tube and a multi-row detector are rectilinearly moved relative to a subject to be imaged from a first position Z1 toward an end of the multi-row detector, projection data corresponding to a central portion a2 of a reconstruction field P3 near the end of the multi-row detector is extracted from the second axial scan data, and Z-filtering is applied based on the projection data of reconstruction fields P1, P2 and P3 to produce one CT image.
摘要翻译：一种通过对使用多行检测器收集的轴向扫描数据应用Z滤波来生成CT图像的方法，其中在X射线管和多行检测器的第二位置Z 2处收集第二轴扫描数据相对于要从第一位置Z 1朝向多行检测器的端部成像的被摄体被直线移动，与多行检测器的端部附近的重建场P 3的中心部分a 2相对应的投影数据从第二轴扫描数据中提取出，并且基于重构场P 1，P 2和P 3的投影数据应用Z滤波，以产生一个CT图像。

14. 发明申请

US20050175139A1 Image reconstructing method and X-ray CT apparatus 审中-公开
标题翻译：图像重建方法和X射线CT装置
公开(公告)号：US20050175139A1
公开(公告)日：2005-08-11
申请号：US11049177
申请日：2005-02-02
申请人： Tetsuya Horiuchi , Kotoko Morikawa
发明人： Tetsuya Horiuchi , Kotoko Morikawa
IPC分类号： A61B6/03 , G06T1/00 , G06T11/00 , G21K1/12 , A61B6/00 , G01N23/00 , H05G1/60
CPC分类号： G06T11/006
摘要： An image reconstructing method includes upon reconstructing an image using a multi-row detector having a plurality of detector sequences and on the basis of projection data D0 collected by a helical scan with a scan surface being tilted effecting, on the projection data, a tilt correcting process for correcting variations on every view, in positions of respective channels of the detector sequences with respect to a linear travel axis due to the inclination of the scan surface, projecting respective pixels in an X-ray penetration direction along lines parallel to an X axis or a Y axis on a reconstruction plane to determine the corresponding projection data and defining the same as backprojected pixel data of respective pixels constituting the reconstruction plane, and adding the backprojected pixel data of all views used in image reconstruction in association with the pixels to determine backprojected data.
摘要翻译：一种图像重建方法包括：使用具有多个检测器序列的多行检测器重建图像，并且基于通过具有倾斜影响的扫描表面的螺旋扫描收集的投影数据D 0在投影数据上的倾斜根据扫描表面的倾斜，检测器序列相对于线性行进轴的各个通道的位置校正各个视图的变化的校正处理，沿与X平行的线沿着X射线穿透方向突出各个像素轴或Y轴，以确定对应的投影数据并将其定义为构成重建平面的各个像素的反投影像素数据，并将与像素相关联的图像重建中使用的所有视图的反投影像素数据相加确定反投影数据。

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