公开(公告)号：US5056146A

公开(公告)日：1991-10-08

申请号：US250152

申请日：1988-09-28

申请人： Akihiko Nishide

发明人： Akihiko Nishide

IPC分类号： A61B10/00 ,  A61B5/055 ,  A61B6/03 ,  G01N23/04 ,  G01R33/32 ,  G06T5/00 ,  G06T7/00 ,  G06T7/60

CPC分类号： G06T7/0081 ,  G06T7/0097 ,  G06T2207/10072 ,  G06T2207/30004

摘要： Two-dimensional tomographic image data is binarized by a predetermined threshold value, and two-dimensional labeling numbers are sequentially given to areas formed by binarization. Data of adjacent tomographic images are bit-added to generate data of a double bit length. When a value of this doubled-bit data appears at a frequency over a predetermined value, it is determined that corresponding areas of the adjacent tomographic image data are connected three-dimensionally, and a three-dimensional labeling number is given.

摘要翻译： 将二维断层图像数据二值化为预定的阈值，并且二维标注号被依次给予由二值化形成的区域。 将相邻断层图像的数据进行位加法以生成双位长度的数据。 当这个双位数据的值出现在超过预定值的频率时，确定相邻断层图像数据的相应区域是三维连接的，并且给出三维标记号。

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：US07251355B2

公开(公告)日：2007-07-31

申请号：US10266274

申请日：2002-10-08

申请人： Akihiko Nishide

发明人： Akihiko Nishide

IPC分类号： G06K9/00

CPC分类号： G06T7/00

摘要： When labeling is performed for a three-dimensional image, the present invention aims to reduce time required for labeling in the three-dimensional image by three-dimensionally referring connection relationships among image areas. To achieve this object, the following processing is performed. A variable i of label number is initialized to 1 (step S901), and pixels whose pixel value is 1 are searched for (step S902). The first time that a pixel whose pixel value is 1 is detected (step S903), the label number of the pixel is set to i (1) (step S904). When the next pixel (target pixel) whose pixel value is 1 is detected (step S905), if plural pixels having label numbers are detected within a three-dimensional neighboring mask, the smallest label number is assigned as the label number of the target pixel (step S907). If one pixel is detected, the label number is assigned as the label number of the target pixel. If all pixel values (except the target pixel) within the three-dimensional neighboring mask are 0, a label number (i+1) is assigned as the label number of the target pixel (step S909).

摘要翻译： 当对于三维图像进行标记时，本发明旨在通过三维地参考图像区域之间的连接关系来减少在三维图像中标记所需的时间。 为了实现该目的，进行以下处理。 将标签号的变量i初始化为1（步骤S901），搜索像素值为1的像素（步骤S902）。 检测像素值为1的像素的第一次（步骤S903），将像素的标号设定为i（1）（步骤904）。 当检测到像素值为1的下一个像素（目标像素）时（步骤S 905），如果在三维相邻掩模内检测到具有标号的多个像素，则将最小标签号分配为目标的标号 像素（步骤S907）。 如果检测到一个像素，则将标签号分配为目标像素的标签号。 如果三维相邻掩模内的所有像素值（目标像素除外）为0，则将标签号（i + 1）分配为目标像素的标号（步骤S909）。

公开(公告)号：US20070019779A1

公开(公告)日：2007-01-25

申请号：US11489065

申请日：2006-07-19

申请人： Akihiko Nishide ,  Naoyuki Kawachi

发明人： Akihiko Nishide ,  Naoyuki Kawachi

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

CPC分类号： A61B6/5205 ,  A61B6/027 ,  A61B6/032

摘要： A data acquisition device, which has an X-ray detector including a plurality of channel widths at which channels at its central portion are fine and channels at its peripheral portions are coarse or rough, and a plurality of data acquisition ranges including a data acquisition range wide in a channel direction and a data acquisition range narrow in the channel direction, and which is capable of performing switching among the data acquisition ranges for each data acquisition, is used to perform data acquisition on the channels fine at the central portion in the data acquisition range narrow in the channel direction, whereby an X-ray CT apparatus is provided which is capable of performing high-resolution imaging and brings about more satisfactory image quality.

摘要翻译： 一种数据采集装置，其具有X射线检测器，该X射线检测器包括多个通道宽度，其中心部分处的通道精细，其周边部分的通道粗糙或粗糙;多个数据采集范围包括数据采集范围 在信道方向上宽的数据采集范围和在信道方向上窄的数据采集范围，并且能够在每个数据采集的数据采集范围之间进行切换，用于在数据的中心部分处精细地对信道执行数据采集 获取范围在通道方向上窄，由此提供能够执行高分辨率成像并且带来更令人满意的图像质量的X射线CT装置。

公开(公告)号：US06937697B2

公开(公告)日：2005-08-30

申请号：US10738053

申请日：2003-12-17

申请人： Akihiko Nishide ,  Hirofumi Yanagita

发明人： Akihiko Nishide ,  Hirofumi Yanagita

IPC分类号： A61B6/03 ,  G01N23/04 ,  G06T11/00 ,  H05G1/44

CPC分类号： G06T11/005 ,  A61B6/032 ,  A61B6/4021 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： An X-ray data collecting apparatus includes a first integrating means periodically executes sequential integration on detected signals from a plurality of X-ray detector elements corresponding to measurement channels in an X-ray detection apparatus at a constant time difference over a constant time period longer than the time difference; a second integrating means periodically executes sequential integration on detected signals from a plurality of X-ray detector elements corresponding to reference channels in the plurality of detector element rows in the X-ray detection apparatus at the same time difference as the constant time difference over the same time period as the constant time period; and a correcting means X-ray-dose corrects signals integrated by the first integrating means by signals integrated by the second integrating means that are integrated at the same time as the signals integrated by the first integration means, respectively.

摘要翻译： 一种X射线数据采集装置，包括：第一积分装置，在恒定时间间隔周期性地对来自X射线检测装置中与X射线检测装置的测量通道对应的X射线检测元件的检测信号进行连续的积分， 比时差; 第二积分装置周期性地对来自与X射线检测装置中的多个检测器元件行中的参考通道相对应的多个X射线检测器元件的检测信号以与该恒定时间差相同的时间差执行顺序积分 相同时间段为恒定时间段; 以及校正装置X射线剂量校正由第一积分装置积分的信号，由与第一积分装置积分的信号同时积分的由第二积分装置积分的信号进行校正。

公开(公告)号：US06845144B2

公开(公告)日：2005-01-18

申请号：US10360588

申请日：2003-02-08

申请人： Akihiko Nishide ,  Sarah K. Patch

发明人： Akihiko Nishide ,  Sarah K. Patch

IPC分类号： A61B6/03 ,  G06T11/00

CPC分类号： G06T11/006 ,  A61B6/027 ,  G06T2211/421 ,  Y10S378/901

摘要： To perform cone beam reconstruction by using projection data correctly corresponding to X-ray beam having passed through each pixel in the reconstruction area, data D1 is obtained which is plane projected to a plane based on projection data D0. Then, plane projection data D1 to the projection plane pp is projected to the reconstruction area in the direction of X-ray transmission to obtain back projection pixel data D2. Thereafter, back projection pixel data D2 will be added for each corresponding pixel for all views to obtain back projection data D3. The present invention provides reconstruction by device of projection data correctly corresponding to the X-ray beam having passed through the reconstruction area. Through the plane projection to a plane the operation will become simplified and faster.

摘要翻译： 为了通过使用正确对应于穿过重建区域中的每个像素的X射线束的投影数据来执行锥形束重建，获得基于投影数据D0投影到平面的平面的数据D1。 然后，将平面投影数据D1与投影平面pp投影到X射线透射方向的重建区域，以获得反投影像素数据D2。 此后，将针对所有视图为每个对应的像素添加背投影像素数据D2，以获得反投影数据D3。 本发明通过设备对通过重建区域的X射线束正确地对准投影数据。 通过平面投影到平面，操作将变得简单和快速。

公开(公告)号：US5309356A

公开(公告)日：1994-05-03

申请号：US502916

申请日：1990-04-02

申请人： Akihiko Nishide ,  Kazushige Takahashi

发明人： Akihiko Nishide ,  Kazushige Takahashi

IPC分类号： G06T3/00 ,  G06T11/00 ,  G06F15/42

CPC分类号： G06T3/0068 ,  G06T11/006

摘要： Continuous tomographic image data obtained by a tomographic image forming unit such as an X-ray CT scanner is stored in a two-dimensional image memory under the control of a control computer. A two-dimensional space filtering processor, a two-dimensional affine transformation processor and a two-dimensional image addition processor are connected to the control computer and execute two-dimensional affine transformation, two-dimensional image addition and two dimensional space filtering of the tomographic image data, so that a pseudo three-dimensional reprojected image is obtained.

摘要翻译： 由X射线CT扫描仪等断层图像形成单元得到的连续断层图像数据在控制计算机的控制下存储在二维图像存储器中。 二维空间滤波处理器，二维仿射变换处理器和二维图像加法处理器连接到控制计算机，执行二维仿射变换，二维图像加法和二维空间滤波 图像数据，从而获得伪三维重新投影图像。

公开(公告)号：US07873141B2

公开(公告)日：2011-01-18

申请号：US11944262

申请日：2007-11-21

申请人： Yasuhiro Imai ,  Akihiko Nishide

发明人： Yasuhiro Imai ,  Akihiko Nishide

IPC分类号： A61B6/00

CPC分类号： A61B6/405 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4042 ,  A61B6/482 ,  A61B6/505 ,  G06T11/008

摘要： For the purpose of providing an X-ray tomographic imaging apparatus for displaying a dual-energy image to facilitate diagnosis by an operator, an X-ray tomographic imaging apparatus (10) comprises: an image comparison information calculating section (24) for calculating image comparison information between said first-energy projection dataset(LD) or first-energy tomographic image(LT) and said second-energy projection dataset(HD) or second-energy tomographic image(HT); a region-of-interest defining section (23) for defining a region of interest; a weighting factor determining section (25-2) for determining a weighting factor for use in weighted subtraction processing between said first-energy projection dataset or first-energy tomographic image and said second-energy projection dataset or second-energy tomographic image, such that said image comparison information in said region of interest can be substantially eliminated by conducting said weighted subtraction processing; and a dual-energy image reconstructing section (22) for reconstructing a dual-energy image by conducting weighted subtraction processing between said first-energy projection dataset or first-energy tomographic image and said second-energy projection dataset or second-energy tomographic image used in said image comparison information calculating section, using a weighting factor determined at said weighting factor determining section.

摘要翻译： 为了提供用于显示双能量图像以便于操作者诊断的X射线断层成像装置，X射线断层成像装置（10）包括：用于计算图像的图像比较信息计算部（24） 所述第一能量投影数据集（LD）或第一能量断层图像（LT）和所述第二能量投影数据集（HD）或第二能量断层图像（HT）之间的比较信息; 用于定义感兴趣区域的兴趣区域定义部分（23）; 用于确定在所述第一能量投影数据集或第一能量断层图像与所述第二能量投影数据集或第二能量层析成像之间的加权减法处理中使用的加权因子的加权因子确定部分（25-2），使得 通过进行所述加权减法处理可以基本上消除所述感兴趣区域中的所述图像比较信息; 以及双能量图像重建部分（22），用于通过在所述第一能量投影数据集或第一能量断层图像和所述第二能量投影数据集或所使用的第二能量断层图像之间进行加权减法处理来重建双能量图像 在所述图像比较信息计算部分中，使用在所述加权因子确定部分确定的加权因子。

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：US07711082B2

公开(公告)日：2010-05-04

申请号：US12324557

申请日：2008-11-26

申请人： Ryosuke Fujimoto ,  Yusuke Nozawa ,  Akihiko Nishide

发明人： Ryosuke Fujimoto ,  Yusuke Nozawa ,  Akihiko Nishide

IPC分类号： A61B6/00

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/405 ,  A61B6/482 ,  A61B6/541

摘要： An X-ray CT apparatus includes an X-ray generating section for generating X-rays with a plurality of X-ray tube voltages; a data collecting section for collecting, synchronously with a data collection signal, X-ray projection data from X-rays with each X-ray tube voltage switched by an X-ray tube voltage switching signal; and a control section for controlling a timed moment for switching of the X-ray tube voltage and a timed moment for start of data collection so that the timed moment for start of data collection at each X-ray tube voltage in the data collection signal is delayed relative to the timed moment for switching of the X-ray tube voltage to that X-ray tube voltage in the X-ray tube voltage switching signal by Δt1, Δt2 depending upon imaging conditions.

摘要翻译： X射线CT装置包括用于产生具有多个X射线管电压的X射线的X射线产生部分; 数据收集部分，用于与X射线管电压切换信号切换的每个X射线管电压同时收集来自X射线的数据收集信号的X射线投影数据; 以及控制部，其控制切换X射线管电压的定时矩和开始数据采集的定时矩，使得数据采集信号中的每个X射线管电压处的数据收集开始的定时时刻为 相对于根据成像条件将X射线管电压切换信号中的X射线管电压与X射线管电压切换为＆Dgr; t1，＆Dgr; t2的定时相比延迟。