公开(公告)号：US07738625B2

公开(公告)日：2010-06-15

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： A61B6/00

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：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。

公开(公告)号：US20060115039A1

公开(公告)日：2006-06-01

申请号：US11290939

申请日：2005-11-30

申请人： Makoto Gohno

发明人： Makoto Gohno

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

CPC分类号： G01T1/02 ,  A61B6/032 ,  A61B6/488 ,  A61B6/542

摘要： With the objective of evaluating whether a dose is excessive for a subject, such a dose that image noise reaches less than or equal to a predetermined value is estimated upon an axial scan on the basis of projection data acquired by a scout scan. The dose is set as a maximum dose. An area other than air, of an image obtained by the axial scan is partitioned into a plurality of small areas i. Image noises N(i) at the respective small areas i are calculated. A warning image G1 in which all of pixel values of pixels in small areas in which the image noises N(i) are less than or equal to a predetermined value, are substituted with pixel values expressed in black level, is created and displayed.

摘要翻译： 为了评估对象的剂量是否过大，图像噪声达到小于或等于预定值的剂量基于通过侦察扫描获得的投影数据进行轴向扫描来估计。 剂量设定为最大剂量。 通过轴向扫描获得的图像之外的空气区域被划分为多个小区域i。 计算各个小区域i处的图像噪声N（i）。 创建并显示其中图像噪声N（i）小于或等于预定值的小区域中的像素的全部像素值被用黑色电平表示的像素值代替的警告图像G 1。

公开(公告)号：US20060109954A1

公开(公告)日：2006-05-25

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：US07050532B2

公开(公告)日：2006-05-23

申请号：US10924365

申请日：2004-08-23

申请人： Makoto Gohno

发明人： Makoto Gohno

IPC分类号： H05G1/34

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/467 ,  A61B6/469 ,  A61B6/545 ,  G01N2223/419 ,  G01N2223/612

摘要： An imaging condition determining method for an x-ray CT apparatus for performing imaging by a helical scan. The method includes making a table of various imaging conditions in advance, extracting at least one imaging condition from the table in accordance with age, imaging region, imaging length of the patient as well as the highest-priority objective specified by a user, and displaying the exposure dose of the patient under the at least one imaging condition, enabling the user to adjust the exposure dose, and determining the imaging condition adjusted in response to the adjustment of the exposure dose to the at least one imaging condition.

摘要翻译： 一种用于通过螺旋扫描进行成像的X射线CT装置的成像条件确定方法。 该方法包括根据年龄，成像区域，患者的成像长度以及由用户指定的最高优先级的目标从表中提取至少一个成像条件，以及显示各种成像条件， 所述患者在所述至少一个成像条件下的暴露剂量，使得所述使用者能够调整所述暴露剂量，以及确定响应于对所述至少一个成像条件的所述暴露剂量的调整而调整的成像条件。

公开(公告)号：US20060050838A1

公开(公告)日：2006-03-09

申请号：US11214503

申请日：2005-08-30

申请人： Akira Hagiwara ,  Makoto Gohno ,  Mitsuru Yahata

发明人： Akira Hagiwara ,  Makoto Gohno ,  Mitsuru Yahata

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

CPC分类号： G06T11/005 ,  A61B6/027 ,  G06T2211/421

摘要： A CT image reconstruction method includes substituting other projection data, which has a predetermined positional relationship to projection data that is found defective during scanning, for the defective data, and interpolating back projection data using a value and information on a scanned position that are contained in the substitute data.

公开(公告)号：US20050100244A1

公开(公告)日：2005-05-12

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： 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： 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。