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1. 发明专利

CA2732929A1 X-RAY IMAGE FORMATION DEVICE 未知
公开(公告)号：CA2732929A1
公开(公告)日：2010-03-04
申请号：CA2732929
申请日：2009-08-12
申请人： ALOKA CO LTD
发明人： KOBAYASHI MASAKI
IPC分类号： A61B6/03
摘要： CT imaging is performed twice (S1101), which is set as the normal number of rotaions, and a sinogram is corrected (S1102) based on the sinogram obtained by performing CT imaging twice. Since the cycles of data variation caused by respiration are controlled so as not to overlap one another, usually the data variations caused by respiration are eliminated by performing CT imaging twice. However, depending on irregularity in the respiration cycle of the subject, data variation components sometimes overlap at the same angle in spite of the fact that the cycles of data variation caused by respiration are controlled so as not to overlap one another. Therefore, when data variation components remain overlapped at the same angle, CT imaging is performed one additional time (S1104) and the sinogram is corrected (S1102) using the sinogram obtained by performing the additional CT imaging.

2. 发明专利

CA2695441C X-RAY CT SCANNER AND CONTROL PROGRAM THEREOF 未知
公开(公告)号：CA2695441C
公开(公告)日：2015-04-28
申请号：CA2695441
申请日：2009-01-14
申请人： ALOKA CO LTD
发明人： KOBAYASHI MASAKI
IPC分类号： A61B6/03
摘要： An X-ray CT scanner performs CT imaging twice on a single imaging site such that respiratory phases relative to rotation of a measuring unit (X-ray generator and X-ray detector) are inverted with respect to each other. For determining a start time of the second CT imaging, a respiration cycle and the like are calculated according to projection data acquired by the first CT imaging. Further, sinograms 70a and 70b are generated, on each of which sets of projection data acquired from each CT imaging are arranged in the order of rotational angles. Subsequently, a corrected sinogram is generated in which sets of data fluctuated portions b and f attributable to respiration in the first sinogram 70a are replaced with data of the corresponding portions in the second sinogram 70b. Finally, a tomographic image is generated on the basis of the corrected sinogram.

3. 发明专利

CA2558653C COMPUTERIZED TOMOGRAPHY DEVICE USING X RAYS AND IMAGE PROCESSING METHOD 未知
公开(公告)号：CA2558653C
公开(公告)日：2012-12-18
申请号：CA2558653
申请日：2006-09-05
申请人： ALOKA CO LTD
发明人： KOBAYASHI MASAKI
IPC分类号： A61B6/03 , G01N23/04
摘要： A computerized tomography device using an X-ray reconstructs a CT image of a sample and processes the CT image. Brown adipose candidate pixels are extracted based on a CT number of each pixel reconstructing the CT image. An erroneous pixel removal process is applied to the candidate pixels. In the erroneous pixel removal process, a boundary pixel removal process, a contraction and expansion process, or the like are applied. With this process, only the brown adipose pixels are extracted. An amount of brown adipose is determined from the brown adipose pixels and an evaluation value such as a brown adipose percentage is calculated based on the amount of brown adipose and amounts of other tissues.

4. 发明专利

CA2732929C X-RAY IMAGE FORMATION DEVICE 未知
公开(公告)号：CA2732929C
公开(公告)日：2013-12-31
申请号：CA2732929
申请日：2009-08-12
申请人： ALOKA CO LTD
发明人： KOBAYASHI MASAKI
IPC分类号： A61B6/03
摘要： CT imaging is performed twice (S1101), which is set as the normal number of rotaions, and a sinogram is corrected (S1102) based on the sinogram obtained by performing CT imaging twice. Since the cycles of data variation caused by respiration are controlled so as not to overlap one another, usually the data variations caused by respiration are eliminated by performing CT imaging twice. However, depending on irregularity in the respiration cycle of the subject, data variation components sometimes overlap at the same angle in spite of the fact that the cycles of data variation caused by respiration are controlled so as not to overlap one another. Therefore, when data variation components remain overlapped at the same angle, CT imaging is performed one additional time (S1104) and the sinogram is corrected (S1102) using the sinogram obtained by performing the additional CT imaging.

5. 发明专利

CA2558653A1 COMPUTERIZED TOMOGRAPHY DEVICE USING X RAYS AND IMAGE PROCESSING METHOD 未知
公开(公告)号：CA2558653A1
公开(公告)日：2007-03-08
申请号：CA2558653
申请日：2006-09-05
申请人： ALOKA CO LTD
发明人： KOBAYASHI MASAKI
IPC分类号： A61B6/03 , G01N23/04
摘要： A computerized tomography device using an X-ray reconstructs a CT image of a sample and processes the CT image. Brown adipose candidate pixels are extracted based on a CT number of each pixel reconstructing the CT image. An erroneous pixel removal process is applied to the candidate pixels. In the erroneous pixel removal process, a boundary pixel removal process, a contraction and expansion process, or the like are applied. With this process, only the brown adipose pixels are extracted. An amount of brown adipose is determined from the brown adipose pixels and an evaluation value such as a brown adipose percentage is calculated based on the amount of brown adipose and amounts of other tissues.

6. 发明专利

CA2695441A1 X-RAY CT SCANNER AND CONTROL PROGRAM THEREOF 未知
公开(公告)号：CA2695441A1
公开(公告)日：2009-09-11
申请号：CA2695441
申请日：2009-01-14
申请人： ALOKA CO LTD
发明人： KOBAYASHI MASAKI
IPC分类号： A61B6/03
摘要： The X-ray CT equipment performs the CT imaging twice for a single imaging location such that respiratory phases relative to rotation of measuring units (X-ray generator and X-ray detector) are inverted with respect to one another. For determining a start timing of the second CT imaging, a respiration cycle and the like are calculated according to the projection data acquired from the first CT imaging. Further, sinograms (70a) and (70b) are generated on which the projection data acquired from each CT imaging is disposed in the order of size in rotation angles. Subsequently, a compensated sinogram is generated that replaces the data at data variation portions b and f attributable to respiration on the first sinogram (70a) with the data at the corresponding portions on the second sinogram (70b). Finally, the tomographic image is generated on the basis of the compensated sinogram.

7. 发明公开

EP2250966A4 X-RAY CT EQUIPMENT AND CONTROL PROGRAM THEREOF 有权
标题翻译： RÖNTENCT设备和控制方案THEREFOR
公开(公告)号：EP2250966A4
公开(公告)日：2011-06-08
申请号：EP09717809
申请日：2009-01-14
申请人： ALOKA CO LTD
发明人： KOBAYASHI MASAKI
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B5/0816 , A61B6/508 , A61B6/5217 , A61B6/541 , G06T11/005 , G06T2211/412

8. 发明专利

JP2009213533A X-ray ct apparatus and its control program 有权
标题翻译： X射线CT设备及其控制程序
公开(公告)号：JP2009213533A
公开(公告)日：2009-09-24
申请号：JP2008057478
申请日：2008-03-07
申请人： Aloka Co Ltd , アロカ株式会社
发明人： KOBAYASHI MASAKI
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B5/0816 , A61B6/508 , A61B6/5217 , A61B6/541 , G06T11/005 , G06T2211/412
摘要： PROBLEM TO BE SOLVED: To provide an X-ray CT apparatus which can generate a preferable tomographic image.
SOLUTION: The X-ray CT apparatus performs CT imaged twice so as to reverse the phase of respiration with respect to the rotation of a measuring unit (X-ray generator and an X-ray detector) for one imaged region. Here, the system computes a respiration cycle or the like on the basis of projection data obtained by first CT imaged so as to decide on the timing of starting second CT imaging. The scanner generates sinograms 70a and 70b in which the projection data obtained from the CT imaging is arranged in order of rotation angles. The apparatus generates a corrected sinogram in which data of data variation parts b and f due to respiration of a first sinogram 70a is replaced with data of the corresponding part of the second sinogram 70b. At the end, the apparatus generates a tomographic image on the basis of the corrected sinogram.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决的问题：提供一种能够生成优选的断层图像的X射线CT装置。解决方案：X射线CT装置执行CT成像两次，以便相对于一个成像区域的测量单元（X射线发生器和X射线检测器）的旋转来反转呼吸相位。这里，系统基于通过第一CT成像获得的投影数据来计算呼吸周期等，以便决定开始第二次CT成像的时间。扫描仪产生正弦图70a和70b，其中从CT成像获得的投影数据按旋转角度的顺序排列。该装置产生校正的正弦图，其中由第一正弦图70a的呼吸引起的数据变化部分b和f的数据被第二正弦图70b的对应部分的数据替换。最后，该装置基于校正的正弦图来生成断层图像。版权所有（C）2009，JPO＆INPIT

9. 发明专利

JP2008302065A X-ray imaging apparatus 有权
标题翻译： X射线成像装置
公开(公告)号：JP2008302065A
公开(公告)日：2008-12-18
申请号：JP2007152783
申请日：2007-06-08
申请人： Aloka Co Ltd , アロカ株式会社
发明人： OTOMO NAOKI , KITAGAWA SHIGERU , HOSOBE TAKASHI , KOBAYASHI MASAKI , YAMASHITA FUMIAKI
IPC分类号： A61B6/03
CPC分类号： A61B6/508
摘要： PROBLEM TO BE SOLVED: To remove foreign radiation components such as cosmic rays included in detection data of X-ray imaging apparatus.
SOLUTION: An X-ray generator 10 irradiates a subject 90 with an X-ray fan beam 12. An X-ray detector 20 has a semiconductor device array 22 consisting of a plurality of semiconductor devices for detecting the fan beam 12. A cosmic ray component removing part 30 removes muon components included in the projection data of the fan beam 12. Specifically, the cosmic ray component removing part 30 determines whether muon components are included or not in a plurality of projection data by comparing the plurality of projection data detected at different hours, and removes the muon components. An image forming part 40 forms X-ray image data by executing the reconstruction arithmetic operation based on the projection data from which the muon components are removed.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：去除包括在X射线成像设备的检测数据中的宇宙射线等外来的辐射成分。解决方案：X射线发生器10用X射线扇形光束12照射被检体90.X射线检测器20具有由用于检测扇形光束12的多个半导体器件组成的半导体器件阵列22。宇宙射线成分去除部30除去风扇光束12的投影数据中包含的μ子成分。具体地，宇宙射线成分去除部30通过比较多个投影来判定多个投影数据中是否包含muon成分在不同时间检测数据，并删除muon组件。图像形成部分40通过基于去除了μ子分量的投影数据执行重建算术运算来形成X射线图像数据。版权所有（C）2009，JPO＆INPIT

10. 发明专利

JP2004113484A Tomographic image processor 有权
公开(公告)号：JP2004113484A
公开(公告)日：2004-04-15
申请号：JP2002281317
申请日：2002-09-26
申请人： Aloka Co Ltd , Aloka System Engineering Co Ltd , アロカシステムエンジニアリング株式会社 , アロカ株式会社
发明人： KOBAYASHI MASAKI , TABEI TOSHIAKI
IPC分类号： G01R33/54 , A61B5/00 , A61B5/055 , A61B6/03 , G06T1/00 , G06T5/00 , G06T7/00
摘要： PROBLEM TO BE SOLVED: To provide a tomographic image processor which enables the faithful separation of cortical bones and bone beams according to the intrinsic shapes thereof by utilizing an image expansion and contraction processing. SOLUTION: A hard part/background identifying part 10 generates a binary-coded image for separately identifying the group of the hard part pixels, corresponding to the bone beams in the cortical bones and spongy bones, from the group of the background pixels other than it. A margin frame generation part 16 and a smearing processing part 18 separately identify the group of the internal background pixels corresponding to the spongy bone portion other than the bone beams from the other group of the external background pixels in the group of the background pixels. An internal background expansion part 22 executes the image expansion processing for the internal background pixels to delete the hard part pixels corresponding to the bone beams, and an internal background contraction part 24 executes the image contraction processing for the internal background pixels to restore the hard part pixels corresponding to the cortical bones. COPYRIGHT: (C)2004,JPO

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