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1. 发明专利

JP2009045449A X-ray computed tomography apparatus 有权
标题翻译： X射线计算机图像设备
公开(公告)号：JP2009045449A
公开(公告)日：2009-03-05
申请号：JP2008188980
申请日：2008-07-22
申请人： Toshiba Corp , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社 , 株式会社東芝
发明人： HORIUCHI TETSUYA , NAKANISHI SATORU , AKINO SHIGEOMI
IPC分类号： A61B6/03 , G06T1/00 , G06T5/20
CPC分类号： A61B6/032 , G06T11/006 , G06T2211/421 , G06T2211/432
摘要： PROBLEM TO BE SOLVED: To suppress cone beam artifacts to the level of full reconstruction while maintaining the time resolution in half reconstruction. SOLUTION: The X-ray computed tomography apparatus includes a gantry 100, reconstruction processing units 117, 118 which generates first volume data on the basis of a projection data set which covers an angle range of 180°+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 119 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 120 which corrects the first volume data on the basis of the correction data. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：将锥束伪影抑制到完全重建的水平，同时在半重建中保持时间分辨率。解决方案：X射线计算机断层摄影装置包括台架100，重建处理单元117,118，其基于覆盖180°+角度范围的角度范围的投影数据集产生第一体积数据，并且还产生基于覆盖360°的角度范围的投影数据组的第二体积数据;校正数据生成单元119，其根据第一体积数据和第二体积数据之间的差产生用于减少锥束伪影的校正数据; 音量数据，以及基于校正数据校正第一音量数据的校正单元120。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JP2008220653A X-ray ct apparatus, method for estimating outline of subject and method for reconstituting image 审中-公开
标题翻译： X射线CT装置，用于估计主题的方法和重建图像的方法
公开(公告)号：JP2008220653A
公开(公告)日：2008-09-25
申请号：JP2007063450
申请日：2007-03-13
申请人： Toshiba Corp , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社 , 株式会社東芝
发明人： AKINO SHIGEOMI , NAKANISHI SATORU , HORIUCHI TETSUYA
IPC分类号： A61B6/03
CPC分类号： G06T11/005 , A61B6/03 , G06T7/564 , G06T2207/10116
摘要： PROBLEM TO BE SOLVED: To provide a technique for estimating an outline which precisely calculates an outline of a subject during a real scanning and improves real-time property during image reconstitution, and also to provide a technique for reconstituting an image which reconstitutes an image of good quality on the basis of the calculated outline.
SOLUTION: 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 a subject. The outline of the subject is then calculated on the basis of the X-ray transmission data of the specific direction. The X-ray transmission data are corrected on the basis of this outline, and an image of the inside of the subject is reconstructed from the corrected X-ray transmission data.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于估计在真实扫描期间精确计算对象的轮廓并提高图像重构期间的实时性的轮廓的技术，并且还提供一种用于重构重建的图像的技术在计算大纲的基础上形成质量好的图像。解决方案：从通过旋转照射被检体周围的X射线的X射线管获得的X射线透射数据中提取特定方向的X射线透射数据。然后基于特定方向的X射线透射数据来计算被检体的轮廓。基于该轮廓校正X射线透射数据，并且从校正的X射线透射数据重建对象的内部的图像。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2013166018A X-ray computed tomography apparatus 有权
标题翻译： X射线计算机图像设备
公开(公告)号：JP2013166018A
公开(公告)日：2013-08-29
申请号：JP2013106267
申请日：2013-05-20
申请人： Toshiba Corp , 株式会社東芝 , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社
发明人： HORIUCHI TETSUYA , NAKANISHI SATORU , AKINO SHIGEOMI
IPC分类号： A61B6/03 , G06T1/00
CPC分类号： A61B6/032 , G06T11/006 , G06T2211/421 , G06T2211/432
摘要： PROBLEM TO BE SOLVED: To suppress cone beam artifacts to the level of full reconstruction while maintaining the time resolution in half reconstruction.SOLUTION: A X-ray computed tomography apparatus includes: a gantry 100; reconstruction processing units 117, 118 which apply a first data redundancy corrective weight to a first projection data set corresponding to a first angle range and generate first volume data on the basis of the applied first projection data set, while they apply a second data redundancy corrective weight to a second projection data set corresponding to a second angle range wider than the first angle range, and generate second volume data on the basis of the applied second projection data set; and a correction unit 120 which corrects a first volume data on the basis of a difference between the first volume data and a second volume data for reducing a cone beam artifact.
摘要翻译：要解决的问题：将锥束伪影抑制到完全重建的水平，同时在半重建中保持时间分辨率。解决方案：X射线计算机断层摄影装置包括：龙门架100; 重构处理单元117,118，其将第一数据冗余校正权重应用于对应于第一角度范围的第一投影数据集，并且在应用第一投影数据集的基础上产生第一体数据，同时应用第二数据冗余校正对应于与第一角度范围宽的第二角度范围相对应的第二投影数据集，并且基于所应用的第二投影数据集生成第二体数据; 以及校正单元120，其基于用于减小锥形束伪影的第一体积数据和第二体数据之间的差异来校正第一体积数据。

4. 发明专利

JP2009066288A X-ray ct apparatus, photography plan assisting apparatus, and photography plan assisting program 有权
标题翻译： X-RAY CT设备，摄影计划辅助设备和摄影计划协助计划
公开(公告)号：JP2009066288A
公开(公告)日：2009-04-02
申请号：JP2007239585
申请日：2007-09-14
申请人： Toshiba Corp , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社 , 株式会社東芝
发明人： TSUKAGOSHI SHINSUKE , HORIUCHI TETSUYA , KAZAMA MASAHIRO
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/107 , A61B6/542
摘要： PROBLEM TO BE SOLVED: To make an operator conscious of radiation exposure during photography using an X-ray CT apparatus.
SOLUTION: A reference dose memory section 203 stores reference dose information in which subject's attribute information are correlated with a reference dose used as a standard of an exposure dose. When a photography condition is set by an operator, a photography plan setting screen control section 204 determines whether or not an exposure dose that the subject receives when X ray is radiated from the photography condition exceeds the reference dose correlated with the attribute information of a photography object or the subject by referring to the reference dose information stored in the reference dose memory section 203. When the photography plan setting display control section 204 determines that the exposure dose exceeds the reference dose, a warning message outputting and processing section 205 outputs a warning message.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：使用X射线CT装置在摄影期间使操作者意识到放射线暴露。解决方案：参考剂量存储部分203存储参考剂量信息，其中受试者的属性信息与用作暴露剂量标准的参考剂量相关联。当摄影条件由操作者设定时，拍摄计划设定画面控制部204判定摄影条件下的X射线照射时被摄体的接收剂量是否超过与摄影的属性信息相关的基准剂量通过参照存储在基准剂量存储部203中的参考剂量信息，对象或被检体。当摄影计划设定显示控制部204判断为曝光量超过基准剂量时，警告信息输出处理部205输出警告信息。版权所有（C）2009，JPO＆INPIT

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