公开(公告)号：US07756240B2

公开(公告)日：2010-07-13

申请号：US11956813

申请日：2007-12-14

申请人： Akihiko Nishide ,  Makoto Gohno

发明人： Akihiko Nishide ,  Makoto Gohno

IPC分类号： A61B6/00

CPC分类号： A61B6/405 ,  A61B6/027 ,  A61B6/4035 ,  A61B6/542 ,  A61B6/583

摘要： The present invention provides an X-ray CT apparatus capable of improving image quality of a dual energy image. The X-ray CT apparatus comprises an X-ray tube for applying X rays having a first energy spectrum and X rays having a second energy spectrum different from the first energy spectrum to a subject, an X-ray data acquisition unit for acquiring X-ray projection data of the first energy spectrum projected onto the subject and X-ray projection data of the second energy spectrum projected thereonto, dual energy image reconstructing unit for image-reconstructing tomographic images indicative of X-ray tube voltage-dependent information at X-ray absorption coefficients related to a distribution of atoms, based on the X-ray projection data of the first energy spectrum and the X-ray projection data of the second energy spectrum, and adjusting unit for adjusting conditions for the image reconstruction in order to optimize the tomographic images indicative of the X-ray tube voltage-dependent information.

摘要翻译： 本发明提供能够提高双能量图像的图像质量的X射线CT装置。 X射线CT装置包括：X射线管，用于将具有第一能谱的X射线和具有与第一能谱不同的第二能谱的X射线施加到被检体; X射线数据获取单元， 投影到被摄体上的第一能量谱的射线投影数据和投射到其上的第二能量谱的X射线投影数据，双能量图像重建单元，用于将X射线管电压依赖信息的X射线管电压依赖性信息进行图像重建， 基于第一能谱的X射线投影数据和第二能谱的X射线投影数据的与原子分布相关的射线吸收系数，以及用于调整图像重建的条件的调整单元，以优化 所述断层图像指示所述X射线管电压依赖性信息。

公开(公告)号：US20090097611A1

公开(公告)日：2009-04-16

申请号：US12252095

申请日：2008-10-15

申请人： Akihiko Nishide ,  Makoto Gohno

发明人： Akihiko Nishide ,  Makoto Gohno

IPC分类号： A61B6/00

CPC分类号： A61B6/032 ,  A61B6/037 ,  A61B6/405 ,  A61B6/482 ,  A61B6/541 ,  G06T11/006 ,  G06T2211/408

摘要： An X-ray CT apparatus includes an X-ray irradiation unit for applying X-rays based on a first X-ray tube voltage and X-rays based on a second X-ray tube voltage to a subject by being switched every one view, a projection data acquisition unit for acquiring projection data by which X-ray tube voltage information about the applied X-rays are identified, and an image reconstruction unit for identifying first energy projection data based on the first X-ray tube voltage, second energy projection data based on the second X-ray tube voltage, and transient energy projection data acquired upon switching between the first and second X-ray tube voltages based on the X-ray tube voltage information, the image reconstruction unit including a conversion processor that converts the transient energy projection data to another data using the transient energy projection data and performs image reconstruction using the data subsequent to the conversion process.

摘要翻译： X射线CT装置包括：X射线照射单元，用于通过每一个视图切换，将X射线基于第一X射线管电压和基于第二X射线管电压的X射线施加到被摄体， 投影数据获取单元，用于获取用于识别关于所施加的X射线的X射线管电压信息的投影数据;以及图像重建单元，用于基于第一X射线管电压来识别第一能量投影数据，第二能量投影 基于第二X射线管电压的数据和基于X射线管电压信息在第一和第二X射线管电压之间切换时获取的瞬态能量投影数据，所述图像重建单元包括转换处理器， 使用瞬态能量投影数据将瞬态能量投影数据转换为另一数据，并使用转换处理之后的数据进行图像重构。

公开(公告)号：US07382858B2

公开(公告)日：2008-06-03

申请号：US11284174

申请日：2005-11-21

申请人： Makoto Gohno

发明人： Makoto Gohno

IPC分类号： H05G1/64

CPC分类号： A61B6/0457 ,  A61B6/027 ,  A61B6/032 ,  A61B6/481 ,  A61B6/488

摘要： With the object of enhancing operability and executing imaging efficiently, a moving speed adjustment unit adjusts a speed at which a table section is moved within an imaging space of a scanning gantry, on the basis of a command from an operator when the scanning gantry scans a subject.

摘要翻译： 为了提高可操作性并有效地执行成像的目的，移动速度调节单元基于来自操作者的命令，当扫描台架扫描一个时，调整扫描台架的成像空间内的台部移动的速度 学科。

公开(公告)号：US20050157840A1

公开(公告)日：2005-07-21

申请号：US11032559

申请日：2005-01-10

申请人： Makoto Gohno ,  Masatake Nukui

发明人： Makoto Gohno ,  Masatake Nukui

IPC分类号： A61B6/03 ,  A61B6/02 ,  G01N23/00 ,  G01N23/04 ,  G21K1/12 ,  H05G1/02 ,  H05G1/60

CPC分类号： A61B6/488 ,  A61B6/027 ,  A61B6/032 ,  A61B6/469 ,  A61B6/5223 ,  G01N23/04 ,  Y10S378/901

摘要： An imaging method for an X-ray CT apparatus having an X-ray source and an X-ray detector disposed to face the X-ray source with a subject placed therebetween, for rotating at least one of the X-ray source and X-ray detector around the subject and detecting X-rays emitted from the X-ray source toward the subject by the X-ray detector, comprises the steps of: defining a reconstruction plane for the subject in a plane non-parallel to a plane formed by rotation of at least one of the X-ray source and X-ray detector around the subject; scanning the subject by emitting cone-shaped X-rays from the X-ray source; and reconstructing a tomographic image of the subject based on the defined reconstruction plane.

摘要翻译： 一种具有X射线源和X射线检测器的X射线CT装置的成像方法，该X射线源和X射线检测器被设置为面对X射线源，被摄体位于其间，用于旋转X射线源和X射线源中的至少一个， 并且通过X射线检测器检测从X射线源朝向被检体发射的X射线，包括以下步骤：在与平面不平行的平面中定义被摄体的重建平面，所述平面不平行于由 X射线源和X射线检测器中的至少一个围绕被检体旋转; 通过从X射线源发射锥形X射线来扫描受试者; 以及基于所述确定的重建平面重建所述对象的断层图像。

公开(公告)号：US20050053191A1

公开(公告)日：2005-03-10

申请号：US10924097

申请日：2004-08-23

申请人： Makoto Gohno ,  Masatake Nukui

发明人： Makoto Gohno ,  Masatake Nukui

IPC分类号： G01T1/00 ,  A61B5/03 ,  A61B6/03 ,  G01N23/04 ,  G01T1/161 ,  H04N5/32 ,  H05G1/60 ,  G01N23/00 ,  G01T1/24 ,  G21K1/12 ,  H01L27/00

CPC分类号： A61B6/032 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： A method and apparatus for reducing the contrast of a tomographic image due to crosstalk and the occurrence of artifacts and improve the quality of the tomographic image. Detection data are subjected to fitting processing in such a manner that, of the data generated by an X-ray detected by X-ray detection elements disposed in array form in a plurality of X-ray detection modules disposed adjacent to one another, first detection data generated by the X-ray detected by X-ray detection elements adjacent to a boundary between the plurality of X-ray detection modules are adapted to waveform data based on second detection data generated by the X-ray detected by X-ray detection elements lying around the adjacent X-ray detection elements.

摘要翻译： 一种用于降低由于串扰引起的断层图像的对比度和伪影的发生并提高断层图像的质量的方法和装置。 对检测数据进行拟合处理，使得在通过以彼此相邻布置的多个X射线检测模块中以阵列形式设置的X射线检测元件检测到的X射线产生的数据中的第一检测 通过与多个X射线检测模块之间的边界相邻的X射线检测元件检测出的X射线产生的数据适合于基于由X射线检测元件检测出的X射线产生的第二检测数据的波形数据 躺在相邻的X射线检测元件周围。

公开(公告)号：US20050053189A1

公开(公告)日：2005-03-10

申请号：US10924111

申请日：2004-08-23

申请人： Makoto Gohno ,  Akira Hagiwara

发明人： Makoto Gohno ,  Akira Hagiwara

IPC分类号： A61B6/03 ,  G01N23/04 ,  H01J35/10 ,  H01J35/14 ,  H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

CPC分类号： A61B6/405 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/4035 ,  A61B6/482 ,  G01N23/046 ,  G01N2223/419 ,  H01J35/10 ,  H01J35/14 ,  H01J2235/086

摘要： An X-ray CT apparatus capable of imaging a subject based on X-rays of multiple energy levels while using an ordinary X-ray detector includes an X-ray tube which generates X-rays from multiple focal points of different 3-dimensional positions sequentially on a time-division basis, a plurality of filters which implement the filtering individually for the X-rays generated individually from the focal points, a collimator which equalizes the irradiation range of the X-rays generated individually from the focal points, collection means which collects projection data of multiple views of a subject of imaging for the X-rays generated individually from the focal points, and reconstruction means which reconstructs an image based on the projection data. The anode of the X-ray tube has multiple impingement portions where electrons released by the cathode impinge at multiple positions on the trajectory of electrons sequentially on a time-division basis.

摘要翻译： 在使用普通X射线检测器的情况下，能够基于多个能级的X射线成像被检体的X射线CT装置包括从不同的3维位置的多个焦点依次产生X射线的X射线管 在时分的基础上，对从焦点分别生成的X射线分别进行滤波的多个滤波器，使来自焦点单独产生的X射线的照射范围相等的准直仪，收集装置， 收集从焦点单独产生的X射线的成像对象的多个视图的投影数据，以及基于投影数据重建图像的重建装置。 X射线管的阳极具有多个冲击部分，其中由阴极释放的电子在时间基础上依次冲击电子轨迹上的多个位置。

公开(公告)号：US20090220043A1

公开(公告)日：2009-09-03

申请号：US12394754

申请日：2009-02-27

申请人： Akihiko Nishide ,  Kozaburo Fujimoto ,  Makoto Gohno

发明人： Akihiko Nishide ,  Kozaburo Fujimoto ,  Makoto Gohno

IPC分类号： H05G1/60

CPC分类号： G01T1/2985 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/405 ,  A61B6/4233 ,  A61B6/4241 ,  A61B6/482

摘要： To provide an X-ray CT apparatus capable of acquiring information on energy of X-rays generated by an X-ray generating apparatus, an X-ray CT apparatus (100) comprises: an X-ray generating apparatus for generating X-rays and emitting the X-rays toward a subject; a first X-ray detector having a plurality of X-ray detection channels for detecting the X-rays emitted from the X-ray generating apparatus; a second X-ray detector for detecting the X-rays emitted from the X-ray generating apparatus in order to acquire information on energy of the X-rays emitted from the X-ray generating apparatus; and an X-ray energy information identifying section for identifying information on energy of the X-rays emitted from the X-ray generating apparatus based on the information detected by the second X-ray detector.

摘要翻译： 为了提供能够获取由X射线产生装置产生的X射线能量的信息的X射线CT装置，X射线CT装置（100）包括：X射线产生装置，用于产生X射线和 向受试者发射X射线; 第一X射线检测器，具有用于检测从X射线产生装置发射的X射线的多个X射线检测通道; 第二X射线检测器，用于检测从X射线产生装置发射的X射线，以获取关于从X射线产生装置发射的X射线的能量的信息; 以及X射线能量信息识别部，其基于由第二X射线检测器检测出的信息来识别从X射线发生装置发射的X射线的能量的信息。

公开(公告)号：US07428290B2

公开(公告)日：2008-09-23

申请号：US11534126

申请日：2006-09-21

申请人： Akihiko Nishide ,  Akira Hagiwara ,  Yasuhiro Imai ,  Makoto Gohno

发明人： Akihiko Nishide ,  Akira Hagiwara ,  Yasuhiro Imai ,  Makoto Gohno

IPC分类号： H05G1/60

CPC分类号： G01N23/046 ,  A61B6/027 ,  A61B6/032 ,  A61B6/469 ,  A61B6/583 ,  G01N2223/419 ,  G01N2223/612

摘要： The present invention is intended to improve image quality ensured by a conventional (axial) scan, a cine scan, or a helical scan performed by an X-ray CT apparatus including a two-dimensional area X-ray detector that has a matrix structure. In helical scan image reconstruction based in three-dimensional image reconstruction performed in an X-ray CT apparatus including a two-dimensional area X-ray detector that is represented by a multi-array X-ray detector or a flat-panel X-ray detector and that has a matrix structure, an image expressing a slice thickness larger than the width of one detector array included in a multi-array X-ray detector is reconstructed according to either of a method of convoluting a z-direction filter to projection data items in the direction of detector arrays (z direction) and a method of convoluting a filer to a tomographic image space in the z direction. The two methods are optimized in terms of a calculation time and tomographic image quality. Consequently, a tomographic image can be quickly reconstructed with high quality.

摘要翻译： 本发明旨在通过包括具有矩阵结构的二维区域X射线检测器的X射线CT装置进行的常规（轴向）扫描，电影扫描或螺旋扫描来提高图像质量。 在基于由包括由多阵列X射线检测器或平板X射线检测器表示的二维区域X射线检测器的X射线CT装置中进行的三维图像重构中的螺旋扫描图像重建中， 检测器，并且具有矩阵结构，根据包括在多阵列X射线检测器中的一个检测器阵列的宽度的表示切片厚度的图像根据将z方向滤波器卷积到投影数据的方法中的任一种被重建 检测器阵列（z方向）的方向的项目以及将扫描器卷绕到z方向上的断层图像空间的方法。 这两种方法在计算时间和断层图像质量方面进行了优化。 因此，可以以高质量快速重建断层图像。

公开(公告)号：US07330609B2

公开(公告)日：2008-02-12

申请号：US10981916

申请日：2004-11-04

申请人： Xueli Wang ,  Xiongwei Yan ,  Wei Ding ,  Makoto Gohno

发明人： Xueli Wang ,  Xiongwei Yan ,  Wei Ding ,  Makoto Gohno

IPC分类号： G06K9/56 ,  H01L27/146

CPC分类号： G01M11/0292 ,  G06T7/66 ,  G06T7/70

摘要： A method of measuring a modulation transfer function (MTF) includes detecting the center of a line spread function (LSF) image in order to calculate an MTF. For this purpose, an enlarged image of a portion of an image containing the LSF image is created, and binary-coded based on a threshold. A morphological operation is performed on the binary-coded image. Coordinates representing points that define the contour of the resultant image are sampled, and used to work out coordinates representing the center of a circle through Hough transform. The coordinates representing the center are transformed into coordinates representing a point in an original image.

摘要翻译： 测量调制传递函数（MTF）的方法包括检测线扩展函数（LSF）图像的中心，以便计算MTF。 为此，创建包含LSF图像的图像的一部分的放大图像，并且基于阈值进行二进制编码。 对二进制编码图像进行形态学操作。 对表示定义所得图像轮廓的点的坐标进行采样，并用于通过霍夫变换求出表示圆心的坐标。 表示中心的坐标被转换为表示原始图像中的点的坐标。

公开(公告)号：US07327824B2

公开(公告)日：2008-02-05

申请号：US10924097

申请日：2004-08-23

申请人： Makoto Gohno ,  Masatake Nukui

发明人： Makoto Gohno ,  Masatake Nukui

IPC分类号： A61B6/03

CPC分类号： A61B6/032 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： A method and apparatus for reducing the contrast of a tomographic image due to crosstalk and the occurrence of artifacts and improve the quality of the tomographic image. Detection data are subjected to fitting processing in such a manner that, of the data generated by an X-ray detected by X-ray detection elements disposed in array form in a plurality of X-ray detection modules disposed adjacent to one another, first detection data generated by the X-ray detected by X-ray detection elements adjacent to a boundary between the plurality of X-ray detection modules are adapted to waveform data based on second detection data generated by the X-ray detected by X-ray detection elements lying around the adjacent X-ray detection elements.

摘要翻译： 一种用于降低由于串扰引起的断层图像的对比度和伪影的发生并提高断层图像的质量的方法和装置。 对检测数据进行拟合处理，使得在通过以彼此相邻布置的多个X射线检测模块中以阵列形式设置的X射线检测元件检测到的X射线产生的数据中的第一检测 通过与多个X射线检测模块之间的边界相邻的X射线检测元件检测出的X射线产生的数据适合于基于由X射线检测元件检测出的X射线产生的第二检测数据的波形数据 躺在相邻的X射线检测元件周围。