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公开(公告)号：US07502439B2
公开(公告)日：2009-03-10
申请号：US11474764
申请日：2006-06-26
申请人： Tetsuya Horiuchi , Junko Sekiguchi
发明人： Tetsuya Horiuchi , Junko Sekiguchi
IPC分类号： G21K1/12
CPC分类号： A61B6/545 , A61B6/032 , A61B6/488 , G01N23/046 , G01N2223/419 , G01N2223/612
摘要： To enable radiation rays to be efficiently used. A scout scan parameter setting unit sets a rotation movement position to which an X-ray tube and an X-ray detector are moved so as to rotate around a subject on the basis of subject information of a subject on which a scout scan is performed at the time of performing a scout scan. At the time of starting execution of the scout scan, a rotating unit moves the X-ray tube and the X-ray detector so as to rotate around the subject to the rotation movement position which is set by the scout scan parameter setting unit. After that, a scout scan is performed in the rotation movement position.
摘要翻译： 使辐射线得到有效利用。 侦察扫描参数设定部基于在其上进行侦察扫描的被摄体的被摄体信息来设定移动X射线管和X射线检测器的旋转移动位置，以围绕被检体旋转 执行侦察扫描的时间。 在开始执行侦察扫描时，旋转单元将X射线管和X射线检测器移动到围绕被摄体旋转的扫描参数设定单元设定的旋转移动位置。 之后，在旋转运动位置进行侦察扫描。
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公开(公告)号：US20090028288A1
公开(公告)日：2009-01-29
申请号：US12179918
申请日：2008-07-25
IPC分类号： A61B6/00
CPC分类号： A61B6/032 , G06T11/006 , G06T2211/421 , G06T2211/432
摘要： An X-ray computed tomography apparatus includes a gantry, a reconstruction processing unit which generates first volume data on the basis of a projection data set which covers an angle range of 180°±a fan angle and also generates second volume data on the basis of a projection data set which covers an angle range of 360°, a correction data generating unit which generates correction data for reducing a cone beam artifact on the basis of a difference between the first volume data and the second volume data, and a correction unit which corrects the first volume data on the basis of the correction data.
摘要翻译： 一种X射线计算机断层摄影装置，包括台架，重建处理单元，其基于覆盖角度范围为180度±扇形角的投影数据集生成第一体积数据，并且还基于 覆盖360°的角度范围的投影数据组;校正数据生成单元，其基于第一体积数据和第二体数据之间的差产生用于减少锥形束伪像的校正数据;以及校正单元， 基于校正数据校正第一卷数据。
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公开(公告)号：US20060291614A1
公开(公告)日：2006-12-28
申请号：US11474764
申请日：2006-06-26
申请人： Tetsuya Horiuchi , Junko Sekiguchi
发明人： Tetsuya Horiuchi , Junko Sekiguchi
CPC分类号： A61B6/545 , A61B6/032 , A61B6/488 , G01N23/046 , G01N2223/419 , G01N2223/612
摘要： To enable radiation rays to be efficiently used. A scout scan parameter setting unit sets a rotation movement position to which an X-ray tube and an X-ray detector are moved so as to rotate around a subject on the basis of subject information of a subject on which a scout scan is performed at the time of performing a scout scan. At the time of starting execution of the scout scan, a rotating unit moves the X-ray tube and the X-ray detector so as to rotate around the subject to the rotation movement position which is set by the scout scan parameter setting unit. After that, a scout scan is performed in the rotation movement position.
摘要翻译： 使辐射线得到有效利用。 侦察扫描参数设定部基于在其上进行侦察扫描的被摄体的被摄体信息来设定移动X射线管和X射线检测器的旋转移动位置，以围绕被检体旋转 执行侦察扫描的时间。 在开始执行侦察扫描时，旋转单元将X射线管和X射线检测器移动到围绕被摄体旋转的扫描参数设定单元设定的旋转移动位置。 之后，在旋转运动位置进行侦察扫描。
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公开(公告)号：US07082181B2
公开(公告)日：2006-07-25
申请号：US11124946
申请日：2005-05-09
申请人： Akihiko Nishide , Tetsuya Horiuchi
发明人： Akihiko Nishide , Tetsuya Horiuchi
IPC分类号： A61B6/00
CPC分类号： G06T5/002 , G06T5/50 , G06T11/005 , G06T11/008 , G06T2207/10081 , G06T2207/30004 , Y10S378/901
摘要： A method for reconstructing an image that can be recognized stably during CAD. The method for reconstructing an image on the basis of a plurality of views of projection data items provided by X-rays having passed through a subject includes image reconstruction dedicated to a computer-aided detection (CAD) mode. The image reconstruction comprises a reconstruction function dedicated to the CAD mode, includes pre-processing that includes a noise removal filter for removing a noise from projection data, such as, a streaky artifact removal dedicated to the CAD mode, and also includes post-processing that includes a noise removal filter dedicated to the CAD mode.
摘要翻译： 一种用于重建可在CAD中稳定识别的图像的方法。 基于通过被摄体的X射线提供的投影数据项的多个视图来重建图像的方法包括专用于计算机辅助检测（CAD）模式的图像重建。 图像重建包括专用于CAD模式的重建功能，包括预处理，包括用于从投影数据去除噪声的噪声去除滤波器，例如专用于CAD模式的条纹伪像去除，并且还包括后处理 其包括专用于CAD模式的噪声去除滤波器。
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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
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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公开(公告)号：US20050008116A1
公开(公告)日：2005-01-13
申请号：US10885189
申请日：2004-07-06
摘要： An object of the present invention is to utilize a distance, which is linearly moved for acceleration or deceleration, out of an overall distance linearly moved during a helical scan for the purpose of image reconstruction. Projection data is acquired even during acceleration or deceleration of linear movement made for a helical scan. The acquired projection data is utilized for image reconstruction. Moreover, during the acceleration of linear movement, while a tube current is being increased, projection data is acquired. During the deceleration of linear movement, while the tube current is being decreased, projection data is acquired.
摘要翻译： 为了图像重构的目的，本发明的目的是利用在螺旋扫描过程中线性移动的整个距离内的加速或减速线性移动的距离。 甚至在进行螺旋扫描的线性运动的加速或减速期间也获取投影数据。 获取的投影数据被用于图像重建。 此外，在线性运动的加速期间，当管电流增加时，获取投影数据。 在线性运动减速期间，当管电流减小时，获取投影数据。
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公开(公告)号：US06754301B2
公开(公告)日：2004-06-22
申请号：US10228514
申请日：2002-08-27
申请人： Tetsuya Horiuchi
发明人： Tetsuya Horiuchi
IPC分类号： G01N2300
CPC分类号： A61B6/488 , A61B6/032 , A61B6/542 , A61B6/56 , A61B2560/0271
摘要： For the purpose of reducing exposure of a subject to unnecessary radiation by controlling the tube current according to the X-ray emitting direction with respect to a region to be examined in the subject, a transmission area S is calculated from a cross-sectional plane (S801) and an ellipticity R is calculated for the cross-sectional plane (S802, S803). An image SD of a region having the transmission area S is then calculated (S804), and a SD ratio of a region having the ellipticity R is calculated (S805). An image SD of a region having the transmission area S and ellipticity R is then calculated using the image SD and the SD ratio (S806). Next, a target SD is specified (S807), and the tube current that controls X-rays emitted in the major-axis direction in the cross-sectional plane of the subject is calculated using the image SD obtained at S806 and the target SD (S808), and the tube current that controls X-rays emitted in the minor-axis direction in the cross-sectional plane of the subject is calculated using the obtained tube current and R (S809).
摘要翻译： 为了通过根据X射线发射方向相对于受检者的被检查区域控制管电流来减少受试者对不需要的辐射的照射，从横截面平面（ S801），并且计算横截面的椭圆度R（S802，S803）。 然后计算具有发送区域S的区域的图像SD（S804），并且计算具有椭圆率R的区域的SD比率（S805）。 然后使用图像SD和SD比率来计算具有透射区域S和椭圆率R的区域的图像SD（S806）。 接下来，指定目标SD（S807），并且使用在S806获得的图像SD和目标SD（...）计算控制在被检体的横截面中沿长轴方向发射的X射线的管电流 S808），并且使用所获得的管电流和R（S809）计算控制在受试者的截面中在短轴方向上发射的X射线的管电流。
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公开(公告)号：US08814801B2
公开(公告)日：2014-08-26
申请号：US12953743
申请日：2010-11-24
申请人： Toshio Tsuji , Masao Yoshizumi , Masashi Kawamoto , Yukihito Higashi , Noboru Saeki , Ryuji Nakamura , Abdugheni Kutluk , Akinobu Kohno , Tetsuya Horiuchi , Teiji Ukawa
发明人： Toshio Tsuji , Masao Yoshizumi , Masashi Kawamoto , Yukihito Higashi , Noboru Saeki , Ryuji Nakamura , Abdugheni Kutluk , Akinobu Kohno , Tetsuya Horiuchi , Teiji Ukawa
CPC分类号： A61B5/022 , A61B5/02007 , A61B5/0402 , A61B5/0452 , A61B8/0891 , A61B8/485
摘要： A vessel wall monitoring apparatus includes: a first detecting unit which detects vessel diameter information based on first biological information obtained from a subject; a first producing unit which differentiates the vessel diameter information detected by the first detecting unit, to produce a vessel diameter function; a second detecting unit which detects blood pressure based on second biological information obtained from the subject; a second producing unit which performs a logarithmic operation on the blood pressure detected by the second detecting unit, to produce a logarithmic blood pressure function; and an outputting unit which produces an impedance model expression by using the vessel diameter function, the logarithmic blood pressure function, and mechanical characteristic values including a stiffness, viscosity, and inertia, and which calculates and outputs at least one of the stiffness, the viscosity, and the inertia based on the impedance model expression.
摘要翻译： 血管壁监视装置包括：第一检测单元，其基于从对象获得的第一生物信息来检测血管直径信息; 第一产生单元，其区分由第一检测单元检测的血管直径信息，以产生血管直径函数; 第二检测单元，其基于从对象获得的第二生物信息检测血压; 第二生成部，对由所述第二检测部检测出的血压进行对数运算，生成对数血压函数; 以及输出单元，其通过使用血管直径函数，对数血压函数和包括刚度，粘度和惯性的机械特性值来产生阻抗模型表达，并且计算并输出刚度，粘度 ，以及基于阻抗模型表达式的惯性。
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9.发明授权X-ray CT system, object-outline estimating method, and image reconstructing method 有权X射线CT系统，物体轮廓估计方法和图像重建方法公开(公告)号：US08416913B2
公开(公告)日：2013-04-09
申请号：US12045966
申请日：2008-03-11
IPC分类号： A61B6/03
CPC分类号： G06T11/005 , A61B6/03 , G06T7/564 , G06T2207/10116
摘要： X-ray transmission data of a specific direction is extracted from X-ray transmission data obtained by rotating an X-ray tube irradiating an X-ray around an object. The outline of the object is calculated based on the X-ray transmission data of the specific direction. Then, based on this outline, the X-ray transmission data is corrected, and an image of the inside of the object is reconstructed from the corrected X-ray transmission data.
摘要翻译： 从通过旋转X射线管照射X射线的物体所获得的X射线透射数据中提取特定方向的X射线透射数据。 基于特定方向的X射线透射数据计算对象的轮廓。 然后，基于该轮廓，对X射线透射数据进行校正，根据经校正的X射线透射数据重构对象内部的图像。
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公开(公告)号：US07639776B2
公开(公告)日：2009-12-29
申请号：US11757732
申请日：2007-06-04
IPC分类号： A61B6/00
摘要： The present invention aims to obtain a tomographic image similar in image quality to a tomographic image obtained by executing a scan at X-ray tube current value set by an X-ray automatic exposure function even when the X-ray tube current value set by the X-ray automatic exposure function are not within a standard range of the X-ray tube current values settable at the X-ray tube (21). X-ray tube current value supplied to the X-ray tube (21) are set by the X-ray automatic exposure function. Thereafter, when the X-ray tube current value set by the X-ray automatic exposure function is not within in the standard range of the X-ray tube current value settable at the X-ray tube, the X-ray tube current value at a portion not within the standard range are changed so as to be within the standard range, and the set value of helical pitch is changed so as to correspond to the ratio between the pre-changed x-ray tube current value and the post-changed X-ray tube current value.
摘要翻译： 本发明的目的在于获得与通过由X射线自动曝光功能设定的X射线管电流值执行扫描而获得的断层图像相似的断层图像，即使当由X射线管电流值 X射线自动曝光功能不在X射线管（21）可设定的X射线管电流值的标准范围内。 通过X射线自动曝光功能设定供给X射线管（21）的X射线管电流值。 此后，当通过X射线自动曝光功能设定的X射线管电流值不在可设置在X射线管的X射线管电流值的标准范围内时，X射线管电流值在 不在标准范围内的部分被改变为在标准范围内，并且改变螺距的设定值，以便对应于预先改变的X射线管电流值和后变化的X射线管电流值之间的比率 X射线管电流值。
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