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1. 发明申请

US20080002806A1 X-RAY CT APPARATUS AND X-RAY CT IMAGING METHOD 审中-公开
标题翻译： X射线CT装置和X射线CT成像方法
公开(公告)号：US20080002806A1
公开(公告)日：2008-01-03
申请号：US11769424
申请日：2007-06-27
申请人： Akihiko Nishide , Makoto Gohno , Masatake Nukui , Akira Hagiwara , Kotoko Morikawa
发明人： Akihiko Nishide , Makoto Gohno , Masatake Nukui , Akira Hagiwara , Kotoko Morikawa
IPC分类号： H05G1/60 , A61B6/00 , G01N23/00 , G21K1/12
CPC分类号： A61B6/4035 , A61B6/027 , A61B6/032 , G01N23/046 , G01N2223/419 , G06T11/005
摘要： Improvement of the picture quality of tomograms in an X-ray CT apparatus using a multi-row x-ray detector is to be realized. When conventional scanning (axial scanning) or cine-scanning is to be performed in consecutive different scanning positions in the z-axis direction, the width of the X-ray beam at scanning positions at both ends is kept at exactly or approximately D/2 relative to the multi-row x-ray detector. Alternatively, the interval between one scanning position and another is kept at not more than D. Unevenness of picture quality dependent on positions on the z-axis on a reconstructed plane can be improved.
摘要翻译：要实现使用多行x射线检测器的X射线CT装置中的断层图像的图像质量的提高。当在z轴方向的连续不同扫描位置进行常规扫描（轴向扫描）或电影扫描时，两端扫描位置处的X射线束的宽度保持在精确或约为D / 2 相对于多行X射线检测器。或者，一个扫描位置与另一扫描位置之间的间隔保持在不大于D.可以提高依赖于重构平面上的z轴上的位置的图像质量的不均匀性。

2. 发明授权

US06466639B2 X-ray CT imaging method, subject center position detection method, and X-ray CT apparatus 失效
标题翻译： X射线CT成像方法，对象中心位置检测方法，X射线CT装置等
公开(公告)号：US06466639B2
公开(公告)日：2002-10-15
申请号：US09751953
申请日：2000-12-29
申请人： Masatake Nukui , Akihiko Nishide
发明人： Masatake Nukui , Akihiko Nishide
IPC分类号： A61B603
CPC分类号： A61B6/032 , A61B6/04 , A61B6/488
摘要： In order to detect whether the center position of a subject is offset from a scan center and notify a human operator of the result of the detection, the subject center position is detected based on a projection profile of a parallel view at a view angle of 90° (S5). If the distance between the subject center position and the scan center exceeds a predefined range (e.g., 50 cm) (S6), a warning is displayed on a CRT to prompt the operator to adjust the position of the subject and repeat imaging (S7).
摘要翻译：为了检测被摄体的中心位置是否偏离扫描中心，并向人类操作者通知检测结果，基于视角为90°的平行视图的投影轮廓来检测被摄体中心位置 °（S5）。如果主体中心位置和扫描中心之间的距离超过预定范围（例如50厘米）（S6），则在CRT上显示警告以提示操作者调整被摄体的位置并重复成像（S7）。

3. 发明授权

US07508903B2 Collimator control method and X-ray CT apparatus 失效
标题翻译：准直仪控制方法和X射线CT装置
公开(公告)号：US07508903B2
公开(公告)日：2009-03-24
申请号：US11199429
申请日：2005-08-08
申请人： Akihiko Nishide , Masatake Nukui , Katsumi Azu
发明人： Akihiko Nishide , Masatake Nukui , Katsumi Azu
IPC分类号： G01N23/083 , G21K1/04
CPC分类号： A61B6/06 , A61B6/027 , A61B6/4085 , A61B6/542
摘要： A collimator control method for an X-ray CT apparatus includes changing an aperture of the collimator according to a position of a helical scan on the body axis of the subject in the progress of the helical scan.
摘要翻译：用于X射线CT装置的准直器控制方法包括在螺旋扫描的进行中根据螺旋扫描在被检体的体轴上的位置来改变准直器的孔径。

4. 发明申请

US20070268996A1 RADIATION IMAGING APPARATUS AND RADIATION IMAGING METHOD 审中-公开
标题翻译：辐射成像装置和辐射成像方法
公开(公告)号：US20070268996A1
公开(公告)日：2007-11-22
申请号：US11745597
申请日：2007-07-26
申请人： Akira Hagiwara , Masatake Nukui , Akihiko Nishide , Makoto Gohno
发明人： Akira Hagiwara , Masatake Nukui , Akihiko Nishide , Makoto Gohno
IPC分类号： H05G1/60 , A61B6/00 , G01N23/00 , G21K1/12
CPC分类号： G01N23/046 , A61B6/032 , A61B6/488 , A61B6/5282 , G01N2223/419 , G01N2223/612
摘要： Embodiments of the present invention improve image quality by preventing artifacts from developing. From the projection data obtained by performing a scan for the imaging area of a subject, a tomographic image for a cross-sectional plane of the imaging area is reconstructed. Based on the tomographic image, the density distribution of the imaging area of the subject is then calculated. Thereafter, the scattered radiation beam data is calculated depending on the density distribution, and the projection data is corrected using the scattered radiation beam data. Finally the corrected image is reconstructed based on the corrected projection data.
摘要翻译：本发明的实施例通过防止伪影显影来提高图像质量。根据对被摄体的成像区域进行扫描获得的投影数据，重建摄像区域的截面的断层图像。基于断层图像，然后计算被检体的成像区域的密度分布。此后，根据密度分布计算散射辐射束数据，并且使用散射辐射束数据校正投影数据。最后，基于校正的投影数据重建校正图像。

5. 发明申请

US20060078083A1 X-ray dose compensation method and X-ray computed tomography apparatus 审中-公开
标题翻译： X射线剂量补偿方法和X射线计算机断层摄影装置
公开(公告)号：US20060078083A1
公开(公告)日：2006-04-13
申请号：US11245833
申请日：2005-10-07
申请人： Akihiko Nishide , Masatake Nukui
发明人： Akihiko Nishide , Masatake Nukui
IPC分类号： H05G1/60 , A61B6/00 , G01N23/00 , G21K1/12
CPC分类号： G01T1/2985 , A61B6/032 , G01T1/166
摘要： The present invention provides an X-ray dose compensation method for X-ray dose compensation of the detector signals from a multiple array detector with improved SNR, used for the detector signal detected by using the multiple array detector in which a plurality of X-ray detector channels placed in one dimensional array in the channel direction is stacked in a plurality of rows in the row direction to form X-ray detector channels of two dimensional matrix. A plurality of specific X-ray detector channels in the multiple array detector or X-ray planar detector or X-ray image intensifier are used as the X-ray dose reference channels for the X-ray dose compensation by means of signal sum or mean of detector signals from those X-ray dose reference channels.
摘要翻译：本发明提供一种X射线剂量补偿方法，用于对来自具有改善的SNR的多阵列检测器的检测器信号的X射线剂量补偿，用于通过使用多阵列检测器检测的检测器信号，其中多个X射线在通道方向上放置成一维阵列的检测器通道以行方向堆叠成多行，以形成二维矩阵的X射线检测器通道。使用多个阵列检测器或X射线平面检测器或X射线图像增强器中的多个特定X射线检测器通道作为用于X射线剂量补偿的X射线剂量参考通道，通过信号和或平均值来自那些X射线剂量参考通道的检测器信号。

6. 发明申请

US20060039536A1 Collimator control method and X-ray CT apparatus 失效
公开(公告)号：US20060039536A1
公开(公告)日：2006-02-23
申请号：US11199429
申请日：2005-08-08
申请人： Akihiko Nishide , Masatake Nukui , Katsumi Azu
发明人： Akihiko Nishide , Masatake Nukui , Katsumi Azu
IPC分类号： G21K1/04
CPC分类号： A61B6/06 , A61B6/027 , A61B6/4085 , A61B6/542
摘要： A collimator control method for an X-ray CT apparatus includes changing an aperture of the collimator according to a position of a helical scan on the body axis of the subject in the progress of the helical scan.

7. 发明授权

US06862336B2 X-ray CT apparatus and method of controlling it 失效
标题翻译： X射线CT装置及其控制方法
公开(公告)号：US06862336B2
公开(公告)日：2005-03-01
申请号：US10382007
申请日：2003-03-05
申请人： Akihiko Nishide , Masaya Kumazaki , Masatake Nukui
发明人： Akihiko Nishide , Masaya Kumazaki , Masatake Nukui
IPC分类号： A61B6/03 , A61B6/08 , G06Q50/22 , G06Q50/24 , G06T1/00
CPC分类号： A61B6/587 , A61B6/08 , A61B6/583 , Y10S378/901
摘要： For the purpose of determining an offset of the position of an X-ray tube from a prespecified position, and correcting axially projected data D1 and pixel projection data D2 based on the determined offset, proper axially projected data D1 can be obtained by an X-ray focal spot 2102 and a detector 2103 by determining axially projected data D1 at a point 2104 using projection data D0 obtained by a channel that detects an X-ray emitted from the X-ray focal spot 2102 and passing through the point 2104, and shifting the determined axially projected data D1 by a distance DIS1 in the (+)-direction of the x-axis.
摘要翻译：为了确定X射线管的位置与预定位置的偏移，并且基于所确定的偏移来校正轴向投影的数据D1和像素投影数据D2，可以通过X射线检测器获得适当的轴向投影数据D1，通过使用通过检测从X射线焦斑2102发射的X射线并通过点2104的通道获得的投影数据D0来确定点2104处的轴向投影数据D1，并且移位的X射线焦点2102和检测器2103 确定的轴向投影数据D1在x轴的（+）方向上的距离DIS1。

8. 发明申请

US20070036263A1 Radiation CT method and X-ray CT apparatus 审中-公开
标题翻译：放射CT法和X光CT装置
公开(公告)号：US20070036263A1
公开(公告)日：2007-02-15
申请号：US11500634
申请日：2006-08-08
申请人： Akihiko Nishide , Akira Hagiwara , Kotoko Morikawa , Masatake Nukui
发明人： Akihiko Nishide , Akira Hagiwara , Kotoko Morikawa , Masatake Nukui
IPC分类号： H05G1/60 , A61B6/00 , G01N23/00 , G21K1/12
CPC分类号： G01N23/046 , A61B6/032 , A61B6/466 , G01N2223/419 , G01N2223/612
摘要： The present invention is intended to improve the quality of a tomographic image to be produced by an X-ray CT apparatus including an X-ray area detector represented by a multi-array X-ray detector or a flat-panel detector. A conventional (axial) or cine scan is performed on the first and second scanned positions in the direction of a z axis. Projection data items produced by scanning the first scanned position and projection data items produced by scanning the second scanned position are used to reconstruct a tomographic image.
摘要翻译：本发明旨在提高由包括由多阵列X射线检测器或平板检测器表示的X射线区域检测器的X射线CT装置产生的断层图像的质量。在z轴的方向上的第一和第二扫描位置执行传统的（轴向）或电影扫描。通过扫描第一扫描位置产生的投影数据项目和通过扫描第二扫描位置产生的投影数据项目用于重建断层图像。

9. 发明授权

US06470206B2 Addition tomographic image producing method and X-ray CT apparatus 失效
标题翻译：加成断层图像制作方法和X射线CT装置
公开(公告)号：US06470206B2
公开(公告)日：2002-10-22
申请号：US09898227
申请日：2001-07-03
申请人： Masatake Nukui , Akihiko Nishide
发明人： Masatake Nukui , Akihiko Nishide
IPC分类号： A61B505
CPC分类号： G06T11/005
摘要： In order to eliminate the adverse effect of the partial volume in producing an addition tomographic image by adding a plurality of tomographic images having different slice thicknesses, an offset correction and a sensitivity correction are applied to row data Ij (j=1-J) from which respective tomographic images Gj can be reconstructed; addition data K is generated by performing a weighted addition on the row data Ij with a weight Tj/&Sgr;Tj corresponding to the slice thickness Tj; logarithm processing is applied to the addition data K; and then the addition data is subjected to reconstruction to produce an addition tomographic image G.
摘要翻译：为了通过添加具有不同切片厚度的多个断层图像来消除部分体积产生附加断层图像的不利影响，将偏移校正和灵敏度校正应用于行数据Ij（j = 1-J），从可以重构各个断层图像Gj; 通过对与行厚度Tj对应的权重Tj / SIGMATj对行数据Ij进行加权相加来生成加法数据K. 对数处理应用于加法数据K; 然后对加法数据进行重建以产生加成断层图像G.

10. 发明申请

US20070165772A1 Methods and apparatus for scatter correction 有权
公开(公告)号：US20070165772A1
公开(公告)日：2007-07-19
申请号：US11331727
申请日：2006-01-14
申请人： Paavana Sainath , Xiaoye Wu , Masatake Nukui , Ronald Lundgren , Thomas Myers
发明人： Paavana Sainath , Xiaoye Wu , Masatake Nukui , Ronald Lundgren , Thomas Myers
IPC分类号： H05G1/60 , A61B6/00 , G01N23/00 , G21K1/12
CPC分类号： G06T11/005 , A61B6/027 , Y10S378/901
摘要： A method for reconstructing an image of an object includes scanning the object with a computed tomography (CT) system to obtain data, estimating a size of the object using the obtained data, using the estimated size of the object to perform scatter correction on the obtained data, and reconstructing an image using the scatter corrected data.

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