公开(公告)号：EP0516047A3

公开(公告)日：1995-01-11

申请号：EP92108851.4

申请日：1992-05-26

申请人： HITACHI, LTD.

发明人： Sekiguchi, Hiroyuki ,  Sano, Koichi ,  Yokoyama, Tetsuo

IPC分类号： G06F15/62

CPC分类号： G06T7/0012 ,  G06T7/11 ,  G06T2207/10072 ,  G06T2207/10088 ,  G06T2207/10116 ,  G06T2207/20101 ,  G06T2207/30004 ,  G06T2207/30008

摘要： In a region extraction to be achieved by a concatenated region expansion processing, to improve reliability of extraction results and to reduce loads imposed on the operator, when a region (305) other than an objective region (304) is extracted as a result of the region extraction, a point (306) belonging to the region (305) other than the objective region (304) is specified in a three-dimensional display image (301) to execute deletion of the region (305).

摘要翻译： 在通过级联区域扩展处理实现的区域提取中，为了提高提取结果的可靠性并减少施加在操作者上的负担，当除了目标区域（304）之外的区域（305）作为 区域提取中，在三维显示图像（301）中指定属于目标区域（304）以外的区域（305）的点（306），以执行区域（305）的删除。

公开(公告)号：EP0516047A2

公开(公告)日：1992-12-02

申请号：EP92108851.4

申请日：1992-05-26

申请人： HITACHI, LTD.

发明人： Sekiguchi, Hiroyuki ,  Sano, Koichi ,  Yokoyama, Tetsuo

IPC分类号： G06F15/62

CPC分类号： G06T7/0012 ,  G06T7/11 ,  G06T2207/10072 ,  G06T2207/10088 ,  G06T2207/10116 ,  G06T2207/20101 ,  G06T2207/30004 ,  G06T2207/30008

摘要： In a region extraction to be achieved by a concatenated region expansion processing, to improve reliability of extraction results and to reduce loads imposed on the operator, when a region (305) other than an objective region (304) is extracted as a result of the region extraction, a point (306) belonging to the region (305) other than the objective region (304) is specified in a three-dimensional display image (301) to execute deletion of the region (305).

摘要翻译： 在通过级联区域扩展处理实现的区域提取中，为了提高提取结果的可靠性并减少施加在操作者上的负担，当除了目标区域（304）之外的区域（305）作为 区域提取中，在三维显示图像（301）中指定属于目标区域（304）以外的区域（305）的点（306），以执行区域（305）的删除。

公开(公告)号：EP0424912A2

公开(公告)日：1991-05-02

申请号：EP90120411.5

申请日：1990-10-24

申请人： HITACHI, LTD.

发明人： Sekiguchi, Hiroyuki ,  Sano, Koichi ,  Yokoyama, Tetsuo

IPC分类号： G06F15/68

CPC分类号： G06T5/20

摘要： In order to ensure that region extraction for extracting a specified internal organ can be effected with high reliability a region expansion method is applied by using an expansion condition (equation (1)) taking the local density change into consideration and an expansion condition (equation (4)) taking the global density change into consideration in combination.

摘要翻译： 为了确保能够高可靠性地进行用于提取特定的内部器官的区域提取，通过使用考虑了局部密度变化的扩张条件（式（1））和扩展条件（等式（1） 4））综合考虑全局密度变化。

公开(公告)号：EP0208236A2

公开(公告)日：1987-01-14

申请号：EP86108947.2

申请日：1986-07-01

申请人： HITACHI, LTD.

发明人： Sano, Koichi Hitachi Fujigaoka-ryo ,  Yokoyama, Tetsuo ,  Takeda, Ryuzaburo ,  Ozawa, Yasuhiko ,  Sato, Shinichi Hitachi Nijigaoka-ryo ,  Koizumi, Hideaki

IPC分类号： G01R33/48 ,  A61B6/00 ,  A61B5/02

CPC分类号： G01F1/716 ,  G01R33/56308 ,  G01R33/56316

摘要： A slice selection gradient magnetic field used in a pulse sequence for generating a spin echo signal is applied in such a fashion that its polarity at the time of a 90° pulse becomes opposite to the one at the time of 180° pulse, in order to expand a dynamic range of blood flow speed measurement. When the blood flow speed contains a component in a slice vertical direction, the gradient magnetic field in the slice vertical direction is adjusted so that the phase changes of two sets of flow encoded pulses contained in the slice vertical direction are opposite to each other.
The flow speed in the direction of the read-out gradient magnetic field, which is a lateral direction of the slide plane, is purely measured by cancelling influences of the flow in the slice vertical direction.

公开(公告)号：EP0424912A3

公开(公告)日：1992-09-23

申请号：EP90120411.5

申请日：1990-10-24

申请人： HITACHI, LTD.

发明人： Sekiguchi, Hiroyuki ,  Sano, Koichi ,  Yokoyama, Tetsuo

IPC分类号： G06F15/68

CPC分类号： G06T5/20

摘要： In order to ensure that region extraction for extracting a specified internal organ can be effected with high reliability a region expansion method is applied by using an expansion condition (equation (1)) taking the local density change into consideration and an expansion condition (equation (4)) taking the global density change into consideration in combination.

公开(公告)号：EP0371477A3

公开(公告)日：1991-10-23

申请号：EP89121987.5

申请日：1989-11-29

申请人： HITACHI, LTD.

发明人： Sano, Koichi ,  Maeda, Akira ,  Yokoyama, Tetsuo ,  Koizumi, Hideaki

IPC分类号： G01R33/56

CPC分类号： G01R33/56316 ,  G01R33/56509 ,  G01R33/56563

摘要： To obtain a high quality image at a vascular area at high speed: (1) there is used a pulse sequence which includes a bipolar phase encoding magnetic field (106, 107), dephases (701, 702) a stationary area, and does not generate the first order moment; (2) phase distortions are estimated from measured data and removed, without incorporating a new function for function fitting; and (3) the relationship between the application timing (T E ) of a readout gradient magnetic field and the latest application time of the other slice selection and phase encoding magnetic fields is obtained using as its parameter the time T E from excitation to generation of an echo peak within a measurement signal, and using this relationship, the application timing T E is obtained which makes minimum the echo peak shift quantity.

公开(公告)号：EP0280310A2

公开(公告)日：1988-08-31

申请号：EP88102845.0

申请日：1988-02-25

申请人： HITACHI, LTD.

发明人： Suzuki, Kazuo ,  Sano, Koichi ,  Yokoyama, Tetsuo ,  Maeda, Akira

IPC分类号： G01N24/08

CPC分类号： G01R33/561

摘要： In order to halve the number of times of signal measurements in a phase encode direction or a readout direction and raise the speed of imaging, the following steps are performed by way of example:

(i) For a measurement region E required by a conventional method, any desired partial region E is set (here, the combination between the region E + and a region obtained by moving the region E in point symmetry with respect to the origin of a measurement space includes the region E).
(ii) A signal h is measured on the region E +.
(iii) An image is reconstructed from the signals h + on a region neighboring the origin, thereby to obtain a phase image θ.
(iv) A reconstructed image is obtained by a predetermined computation employing θ .

摘要翻译： 为了将相位编码方向或读出方向的信号测量次数减半，提高成像速度，以下步骤为例：（i）对于常规方法所需的测量区域E ，设定任何期望的部分区域E +（这里，区域E +与通过移动相对于测量空间的原点的点对称的区域E +获得的区域的组合包括区域 E）。 （ii）在区域E +上测量信号h +。 （iii）从与原点相邻的区域上的信号h +重建图像，从而获得相位图像@。 （iv）通过使用@的预定计算获得重建图像。

公开(公告)号：EP0943619B1

公开(公告)日：2004-11-10

申请号：EP99104078.3

申请日：1999-03-18

申请人： Hitachi, Ltd.

发明人： Ikeda, Yukiko ,  Endo, Yoshishige ,  Yoshimura, Yasuhiro ,  Terayama, Takao ,  Yasuda, Kenji ,  Sakurai, Toshinari ,  Yokoyama, Tetsuo ,  Aono, Takanori

IPC分类号： C07H1/08 ,  C03C11/00 ,  G01N30/48

CPC分类号： B01J20/2803 ,  B01J20/103 ,  B01J20/28026 ,  B01J20/283 ,  B01J20/3234

公开(公告)号：EP0208236B1

公开(公告)日：1992-10-21

申请号：EP86108947.2

申请日：1986-07-01

申请人： HITACHI, LTD.

发明人： Sano, Koichi Hitachi Fujigaoka-ryo ,  Yokoyama, Tetsuo ,  Takeda, Ryuzaburo ,  Ozawa, Yasuhiko ,  Sato, Shinichi Hitachi Nijigaoka-ryo ,  Koizumi, Hideaki

IPC分类号： G01R33/48 ,  A61B6/00 ,  A61B5/02

CPC分类号： G01F1/716 ,  G01R33/56308 ,  G01R33/56316

公开(公告)号：EP0280310A3

公开(公告)日：1990-11-22

申请号：EP88102845.0

申请日：1988-02-25

申请人： HITACHI, LTD.

发明人： Suzuki, Kazuo ,  Sano, Koichi ,  Yokoyama, Tetsuo ,  Maeda, Akira

IPC分类号： G01N24/08

CPC分类号： G01R33/561

摘要： In order to halve the number of times of signal measurements in a phase encode direction or a readout direction and raise the speed of imaging, the following steps are performed by way of example:
(i) For a measurement region E required by a conventional method, any desired partial region E is set (here, the combination between the region E + and a region obtained by moving the region E in point symmetry with respect to the origin of a measurement space includes the region E). (ii) A signal h is measured on the region E +. (iii) An image is reconstructed from the signals h + on a region neighboring the origin, thereby to obtain a phase image θ. (iv) A reconstructed image is obtained by a predetermined computation employing θ .

摘要翻译： 为了将相位编码方向或读出方向上的信号测量次数减半并提高成像速度，例如执行以下步骤：（i）对于常规方法所需的测量区域E 设定任意的部分区域E（这里，区域E +与通过使区域E相对于测量空间的原点点对称而得到的区域的组合包含区域E）。 （ii）在区域E +上测量信号h。 （iii）根据邻近原点的区域上的信号h +重建图像，从而获得相位图像θ。 （iv）通过使用θ的预定计算来获得重建图像。