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1. 发明专利

JP2008253794A Projection data evaluation method and x-ray ct apparatus 审中-公开
标题翻译：投影数据评估方法和X射线CT设备
公开(公告)号：JP2008253794A
公开(公告)日：2008-10-23
申请号：JP2008151365
申请日：2008-06-10
申请人： Ge Medical Systems Global Technology Co Llc , ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー
发明人： YAN JIONGUWEI , DEINGU WEI , GONO MAKOTO , WANGU SUERI
IPC分类号： A61B6/03 , G06T5/00
摘要： PROBLEM TO BE SOLVED: To provide a method for determining the normality of projection data in a view channel space, and an X-ray CT apparatus for making such a determination. SOLUTION: The method for evaluating the normality of projection data collected in the view channel space comprises obtaining the difference of projection data at a pair of data points in a mutual mirror point relationship in the view channel space, and evaluating the normality of the projection data based on the difference. When there is no accurate mirror point A' corresponding to the data point A, data interpolated from data of nearby data points B, C is utilized. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于确定视野通道空间中的投影数据的正常性的方法和用于进行这种确定的X射线CT装置。解决方案：用于评估在视图通道空间中收集的投影数据的正常性的方法包括：在观看通道空间中获得在相互镜像点关系中的一对数据点处的投影数据的差异，并且评估正态度投影数据基于差异。当不存在对应于数据点A的精确镜像点A'时，利用从附近数据点B，C的数据插值的数据。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JP2008142390A X-ray ct apparatus 有权
标题翻译： X射线CT装置
公开(公告)号：JP2008142390A
公开(公告)日：2008-06-26
申请号：JP2006334455
申请日：2006-12-12
申请人： Ge Medical Systems Global Technology Co Llc , ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー
发明人： WATANABE SEIKI , GONO MAKOTO , SHINYA MASAE
IPC分类号： A61B6/03
摘要： PROBLEM TO BE SOLVED: To realize an X-ray CT apparatus which facilitates beam hardening correction.
SOLUTION: The X-ray CT apparatus has a photographing part which reconstructs images from projection data acquired by scanning the site of a subject set via a scout photographing with X rays and a control part which controls the operation involved. The control part works to determine the attenuation of transmission X rays at a location subject to photographing from the result of the scout photographing and causes changes in the X-ray beam quality during the scanning operation according to the variance of the attenuation. The changes in the X-ray beam quality are made by increasing or decreasing the tube voltage of an X-ray tube.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：实现有助于束硬化校正的X射线CT装置。解决方案：X射线CT装置具有拍摄部件，其通过用X射线通过侦察拍摄扫描被摄体组的位置而获得的投影数据和控制所涉及的操作的控制部分重建图像。控制部分用于根据侦察拍摄的结果确定在受拍摄的位置处的透射X射线的衰减，并且根据衰减的方差在扫描操作期间引起X射线束质量的变化。通过增加或减少X射线管的管电压来进行X射线束质量的变化。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2007135658A X-ray ct apparatus and x-ray ct fluoroscopic apparatus 审中-公开
标题翻译： X射线CT装置和X射线CT荧光装置
公开(公告)号：JP2007135658A
公开(公告)日：2007-06-07
申请号：JP2005329714
申请日：2005-11-15
申请人： Ge Medical Systems Global Technology Co Llc , ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー
发明人： NISHIDE AKIHIKO , KAWACHI NAOYUKI , IZUMIHARA AKIRA , GONO MAKOTO , WATANABE SEIKI
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4085
摘要： PROBLEM TO BE SOLVED: To achieve the low-exposure tomography or X-ray CT fluoroscopy in an X-ray CT apparatus or X-ray CT fluoroscopic apparatus.
SOLUTION: X-ray data are collected by controlling the position of an X-ray collimator or beam-forming X-ray filter in the direction of a channel so that X rays are applied to a concerned region only. The profile area of the whole subject is obtained or the profile area of the whole subject is estimated based on a view or a scout image in which the whole subject is irradiated among the X-ray projection data. The view in which the whole subject is not irradiated among the collected projection data is reconstructed by estimating a missing part from the profile area of the whole subject and correcting the image. In this way, X-ray exposure of the subject in the tomography of the X-ray CT apparatus or in the X-ray CT fluoroscopy and the X-ray exposure of the hand of an operator performing the puncture can be reduced by irradiating the concerned region only with X rays.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：在X射线CT装置或X射线CT透视装置中实现低曝光层析成像或X射线CT透视。解决方案：通过在通道的方向上控制X射线准直仪或射束形成X射线滤波器的位置来收集X射线数据，使得X射线仅被施加到相关区域。获取整个被摄体的轮廓区域，或者根据在X射线投影数据中照射整个被摄体的视野或侦察图像来估计整个被摄体的轮廓区域。通过从整个被摄体的轮廓区域估计缺失部分并校正图像来重建在所收集的投影数据中未照射整个被摄体的视图。以这种方式，可以通过照射X射线CT装置的X射线CT装置的X射线CT透视和X射线CT透视和进行穿刺的操作者的手的X射线曝光来减少受试者的X射线曝光有关地区只有X射线。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2006068227A Method of reconstructing computed tomographic (ct) image, ct apparatus and program 有权
标题翻译：重建计算机图像（CT）图像，CT装置和程序的方法
公开(公告)号：JP2006068227A
公开(公告)日：2006-03-16
申请号：JP2004254536
申请日：2004-09-01
申请人： Ge Medical Systems Global Technology Co Llc , ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー
发明人： HAGIWARA AKIRA , GONO MAKOTO , HACHIMAN MITSURU
IPC分类号： A61B6/03
CPC分类号： G06T11/005 , A61B6/027 , G06T2211/421
摘要： PROBLEM TO BE SOLVED: To faithfully reflect the attributes (value and positional information) of alternate data for covering failure data to the generation of data for image reconstruction.
SOLUTION: This method of reconstructing a computed tomographic (CT) image obtains back projection data required for reconstitution of the CT image based on projection data obtained by scanning a subject by data interpolation operation from each projection data in the vicinity of front and rear side of a tomographic surface and reconstructs the tomographic image of the subject based on the obtained back projection data. The method carries out data interpolation operation of back projection data h(Ch and Vj) by substituting projection data g(CH2 and Vi) or g(CH4 and Vk) etc. in a prescribed positional relation for projection data g(CH3 and Vj) which comes into a failure in the case of scanning, and using the value of the substituted data and scanning position information (channel and view).
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：忠实地将用于覆盖故障数据的备用数据的属性（值和位置信息）反映到用于图像重建的数据的生成。解决方案：这种重建计算机断层摄影（CT）图像的方法基于通过数据插值操作从前面附近的每个投影数据通过扫描对象而获得的投影数据获得CT图像重构所需的背投影数据，以及基于所获得的反投影数据重建对象的断层图像。该方法通过以投影数据g（CH3和Vj）的规定位置关系替换投影数据g（CH2和Vi）或g（CH4和Vk）等来执行反投影数据h（Ch和Vj）的数据插值操作，在扫描的情况下会发生故障，并使用替代数据的值和扫描位置信息（通道和视图）。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2005342366A Hardness measuring apparatus 有权
标题翻译：硬度测量装置
公开(公告)号：JP2005342366A
公开(公告)日：2005-12-15
申请号：JP2004168011
申请日：2004-06-07
申请人： Ge Medical Systems Global Technology Co Llc , ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー
发明人： GONO MAKOTO
IPC分类号： A61B6/03
摘要： PROBLEM TO BE SOLVED: To provide a hardness measuring apparatus capable of easily measuring the hardness of biological tissue in the very small part and specifying the very small lesion highly precisely. SOLUTION: An animation generating part 61 generates an animation including the region of interest in a subject 6, based on projection data of the subject 6, which is obtained by an X-ray to transmit the subject 6 after being irradiated. A feature point setting part 62 extracts a feature point from the region of interest of the animation to be generated by the animation generating part 61 and setting the extracted feature point in the animation. Then a hardness data calculating part 63 calculates hardness data of the region of interest, based on the degree of change in the position of the feature point, which is set by the feature point setting part 62, in response to time. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供能够容易地测量非常小的生物组织的硬度并高度精确地指定非常小的损伤的硬度测量装置。解决方案：动画生成部61基于被摄体6的投影数据，生成包含被摄体6的感兴趣区域的动画，该投影数据是通过X射线获得的，在被照射之后传送对象6。特征点设定部62从动画生成部61生成的动画的感兴趣区域中提取特征点，并且在动画中设定提取的特征点。然后，硬度数据计算部63根据由特征点设定部62设定的特征点的位置的变化程度，根据时间计算感兴趣区域的硬度数据。版权所有（C）2006，JPO＆NCIPI

6. 发明专利

JP2005253815A Method of crosstalk correction and x-ray ct apparatus 有权
标题翻译： CROSSTALK校正和X射线CT装置的方法
公开(公告)号：JP2005253815A
公开(公告)日：2005-09-22
申请号：JP2004071978
申请日：2004-03-15
申请人： Ge Medical Systems Global Technology Co Llc , ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー
发明人： NUKUI MASAYASU , IMAI YASUHIRO , GONO MAKOTO
IPC分类号： A61B6/03 , G01T1/164
CPC分类号： G01T1/164 , A61B6/583 , G01T1/2985
摘要： PROBLEM TO BE SOLVED: To provide a method of crosstalk correction and an X-ray CT apparatus, capable of easily eliminating leakage of fluorescent light generated between scintillators adjacent in the direction of slicing. SOLUTION: An ideal projection length In(D n ) is found by a first function fitting means 51 in the direction of channels and a second function fitting means 53 in the direction of slicing from slope phantom projection information 41. Then, coefficients of leakage ε + and ε - are determined by using an expression 1, and after that, intensity information D n is found by using an expression 2 and the coefficients ε + and ε - by a crosstalk eliminating means 82 from detection information S n constituting subject projection information 42 of a subject. Accordingly, a component of leakage in scintillators adjacent in the direction of slicing included in the subject projection information 42 can be removed by a simple method and an artifact resulted from the leakage in the direction of slicing can be eliminated, and as a result, the image quality can be improved. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种串扰校正方法和X射线CT装置，能够容易地消除在切片方向上相邻的闪烁体之间产生的荧光的泄漏。解决方案：通过第一功能拟合装置51在通道方向上找到理想的投影长度In（D n ），并且在从斜体模型切片的方向上发现第二功能拟合装置53 投影信息41.然后，使用表达式1确定泄漏系数ε + 和ε - ，之后，强度信息D n n 的串扰消除装置82通过使用表达式2和系数ε + 和ε - 对象的投影信息42。因此，可以通过简单的方法去除包括在被摄体投影信息42中的在切片方向上相邻的闪烁体中的泄漏的分量，并且可以消除由于切片方向上的泄漏而产生的伪像，结果，图像质量可以提高。版权所有（C）2005，JPO＆NCIPI

7. 发明专利

JP2005137883A Mtf measuring method and device 有权
标题翻译： MTF测量方法和装置
公开(公告)号：JP2005137883A
公开(公告)日：2005-06-02
申请号：JP2004205729
申请日：2004-07-13
申请人： Ge Medical Systems Global Technology Co Llc , ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー
发明人： WAN SUERI , XIONGWEI YAN , WEI DING , GONO MAKOTO
IPC分类号： A61B6/03 , G01M11/00 , G01M11/02 , G06F17/00 , G06K9/00 , G06K9/36 , G06T1/00 , G06T7/00 , G06T7/60
CPC分类号： G01M11/0292 , G06T7/66 , G06T7/70
摘要： PROBLEM TO BE SOLVED: To provide MTF (modulation transfer function) measuring method and device, obtaining the MTF by Fourier transform of LSF (line spread function) with good accuracy.
SOLUTION: In detecting the center of a LSF image for calculating the MTF, an enlarged image of a part including the LSF image is created (205), the enlarged image is binarized on the basis of a threshold (207), morphological operation is performed for the binarized image (209), the contour coordinates of the image after operation is obtained (211), the center coordinates of a circle is obtained using the contour coordinates by Hough transform (213), and the obtained coordinates is converted to the coordinates in the original image (215).
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供MTF（调制传递函数）测量方法和装置，通过LSF的傅里叶变换（线扩展函数）以良好的精度获得MTF。解决方案：在检测用于计算MTF的LSF图像的中心时，创建包括LSF图像的部分的放大图像（205），根据阈值（207）将放大图像二值化，形态学对于二值化图像（209）进行操作，获得操作后的图像的轮廓坐标（211），使用霍夫变换（213）使用轮廓坐标获得圆的中心坐标，并且将获得的坐标转换到原始图像中的坐标（215）。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JP2005080919A Radiation tomograph apparatus 有权
标题翻译：辐射测图仪
公开(公告)号：JP2005080919A
公开(公告)日：2005-03-31
申请号：JP2003317093
申请日：2003-09-09
申请人： Ge Medical Systems Global Technology Co Llc , ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー
发明人： GONO MAKOTO
IPC分类号： A61B6/00 , A61B6/03 , G01N23/04
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4035 , A61B6/5282 , G01N23/046 , G01N2223/419
摘要： PROBLEM TO BE SOLVED: To upgrade the quality of the tomographic images by preventing the drop in the contrast of the tomographic images and the generation of artifacts even when numerous scattered rays are generated. SOLUTION: An X-ray detection array 23 uses the X-ray detector 23a corresponding to an area not shielded by a collimator 22 to acquire first detection data by the X-rays 5 made to directly irradiate the X-ray detector 23a passing through an object 6 to be imaged from an X-ray tube 20 and by the scattered X-rays 5 by transmitting through the object 6 from the X-ray tube 20. Moreover, the X-ray detection array 23 uses the X-ray detector 23a corresponding to the area shielded by the collimator 22 to acquire second detection data by the scattered X-rays. The central processor 30 corrects the first detection data to generate the tomographic image in the imaging area R of the object 6 based on the first and second detection data. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：即使当产生许多散射光线时，通过防止断层图像的对比度的下降和伪像的产生来升级断层图像的质量。解决方案：X射线检测阵列23使用对应于未被准直仪22屏蔽的区域的X射线检测器23a，通过直接照射X射线检测器23a的X射线5获取第一检测数据通过从X射线管20透过物体6从X射线管20和散射的X射线5穿过要成像的物体6.此外，X射线检测阵列23使用X- 对应于由准直仪22屏蔽的区域的X射线检测器23a，以通过散射的X射线获取第二检测数据。中央处理器30基于第一和第二检测数据校正第一检测数据以在对象6的成像区域R中生成断层图像。版权所有（C）2005，JPO＆NCIPI

9. 发明专利

JP2009279289A X-ray ct apparatus 有权
标题翻译： X射线CT装置
公开(公告)号：JP2009279289A
公开(公告)日：2009-12-03
申请号：JP2008136189
申请日：2008-05-26
申请人： Ge Medical Systems Global Technology Co Llc , ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー
发明人： NISHIDE AKIHIKO , GONO MAKOTO
IPC分类号： A61B6/03
摘要： PROBLEM TO BE SOLVED: To provide an X-ray CT apparatus capable of obtaining tomographic images of uniform image quality among a plurality of tomographic images within a tomographic region even if there are areas with inefficiency in the degree of hardening of radiation quality or the dose of X-rays within the tomographic region of a subject. SOLUTION: The X-ray CT apparatus 100 reconstructs an image based on X-ray projection data obtained by scanning the tomographic region of the subject HB with X-rays from an X-ray generating part 21. The X-ray CT apparatus comprises: an X-ray control part 22 for changing the radiation quality of the X-ray beams emitted from the X-ray generating part during the scan according to the position of the subject in the direction of the body axis within the tomographic region of the subject; and an image reconstruction part 34 for reconstructing a plurality of tomographic images of the uniform X-ray beam radiation quality within the tomographic region based on the X-ray projection data with the changed X-ray beam radiation quality. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够在断层摄影区域内的多个断层图像中获得均匀图像质量的断层图像的X射线CT装置，即使存在辐射质量硬化程度低的区域或受试者的断层摄影区域内的X射线剂量。解决方案：X射线CT装置100基于通过用X射线产生部21扫描对象HB的断层图像区域而获得的X射线投影数据来重建图像.X射线CT 装置包括：X射线控制部22，用于根据被检体在体位轴方向的断层图像区域内的位置来改变在扫描期间从X射线产生部发射的X射线束的辐射质量的主题; 以及图像重建部34，用于基于具有改变的X射线束辐射质量的X射线投影数据重建断层图像区域内的均匀X射线束辐射质量的多个断层图像。版权所有（C）2010，JPO＆INPIT

10. 发明专利

JP2009089810A X-ray ct system 审中-公开
标题翻译： X射线CT系统
公开(公告)号：JP2009089810A
公开(公告)日：2009-04-30
申请号：JP2007261480
申请日：2007-10-05
申请人： Ge Medical Systems Global Technology Co Llc , ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー
发明人： NISHIDE AKIHIKO , GONO MAKOTO
IPC分类号： A61B6/03
摘要： PROBLEM TO BE SOLVED: To acquire a scout image having an image showing the left and right parts of a specimen horizontally symmetric in width which achieves a proper horizontal symmetry regardless of the size of an imaging area of the specimen in an X-ray CT system equipped with a non-symmetrical detector, non-symmetrical in the channel direction with respect to the center line running through the X-ray focus and the center of rotation in an X-ray data collection system. SOLUTION: X-ray projection data are collected by helical scanning or variable pitch helical scanning of the specimen at a low dosage to reconstruct a plurality of tomographic images successively in the direction of the body axis of the specimen (slicing direction) from the data. The plurality of tomographic images is re-projected in a prescribed direction to acquire the scout image of the specimen. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了获得具有示出水平对称的样本的左侧和右侧部分的图像，该图像实现了适当的水平对称，而与X射线中的样本的成像区域的尺寸无关。射线CT系统配备有非对称检测器，在通道方向相对于穿过X射线焦点的中心线和X射线数据收集系统中的旋转中心不对称。解决方案：以低剂量通过螺旋扫描或样品间距螺旋扫描收集X射线投影数据，以在样本的体轴方向（切片方向）上连续重建多个断层图像数据。多个断层图像在规定的方向上重新投影以获取样本的侦察图像。版权所有（C）2009，JPO＆INPIT

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