专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5553207A Method of and apparatus for region extraction in three-dimensional voxel data 失效
标题翻译：三维体元数据中区域提取的方法和装置
公开(公告)号：US5553207A
公开(公告)日：1996-09-03
申请号：US249045
申请日：1994-05-24
申请人： Hiroyuki Sekiguchi , Koichi Sano , Tetsuo Yokoyama
发明人： Hiroyuki Sekiguchi , Koichi Sano , Tetsuo Yokoyama
IPC分类号： G06T5/00 , G06F15/00
CPC分类号： G06T7/0081 , G06T7/0012 , 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 other than an objective region is extracted as a result of the region extraction, a point belonging to the region other than the objective region is specified in a three-dimensional display image to execute deletion of the overflow region.
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，当通过区域提取的结果提取除了目标区域之外的区域时，点属性在三维显示图像中指定到目标区域以外的区域，以执行溢出区域的删除。

2. 发明授权

US5319551A Region extracting method and three-dimensional display method 失效
标题翻译：区域提取方法和三维显示方法
公开(公告)号：US5319551A
公开(公告)日：1994-06-07
申请号：US602817
申请日：1990-10-24
申请人： Hiroyuki Sekiguchi , Koichi Sano , Tetsuo Yokoyama
发明人： Hiroyuki Sekiguchi , Koichi Sano , Tetsuo Yokoyama
IPC分类号： G01R33/32 , A61B5/055 , G01R33/28 , G06T1/00 , G06T5/20 , G06F15/66
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 a combination of an expansion condition taking the local density change into consideration and an expansion condition taking the global density change into consideration.
摘要翻译：为了确保能够高可靠性地进行用于提取特定内脏的区域提取，通过使用考虑了局部密度变化的扩张条件和采用全局密度变化的扩张条件的组合来应用区域扩张法考虑到。

3. 发明授权

US6064391A Method for displaying region extracting processing in an image processing system 失效
标题翻译：一种用于在图像处理系统中显示区域提取处理的方法
公开(公告)号：US6064391A
公开(公告)日：2000-05-16
申请号：US797893
申请日：1991-11-26
申请人： Koichi Sano , Hiroyuki Sekiguchi , Tetsuo Yokoyama
发明人： Koichi Sano , Hiroyuki Sekiguchi , Tetsuo Yokoyama
IPC分类号： A61B6/03 , G06T1/00 , G06T15/08 , G06T7/60
CPC分类号： G06T15/08
摘要： To efficiently, 3-dimensionally, perspectively project and display the extracting processing procedure of a predetermined region on a 3-dimensional image, the extracting process is executed while observing the displayed image. Further, the process is interrupted as necessary so that the process can progress or be returned. The result of the extraction at the interruption time point is edited on a 2-dimensional image and the result of the edition is immediately reflected onto the 3-dimensional image, so that whether the edition is proper or improper can be decided.
摘要翻译：为了有效地三维地投影和显示三维图像上的预定区域的提取处理过程，在观察所显示的图像的同时执行提取处理。此外，根据需要中断该过程，以便该过程可以进行或被返回。中断时间点的提取结果在二维图像上进行编辑，并将版本的结果立即反映到三维图像上，从而可以确定版本是否正确或不正确。

4. 发明授权

US5023553A Method and apparatus for body motion corrective imaging 失效
标题翻译：身体运动矫正成像的方法和装置
公开(公告)号：US5023553A
公开(公告)日：1991-06-11
申请号：US330835
申请日：1989-03-30
申请人： Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi
发明人： Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi
IPC分类号： G01R33/54 , A61B5/055 , A61B10/00 , G01R33/28 , G01R33/32 , G01R33/567
CPC分类号： G01R33/5676
摘要： In order to eliminate the degradation of NMR image caused by a body motion due to breathing or the like, one of measured image signals is selected as a reference, correlation is calculated between each measured image signal and the reference, and the image signal is modified on the basis of the value of correlation.
摘要翻译：为了消除由于呼吸等引起的身体运动引起的NMR图像的劣化，选择测量图像信号之一作为参考，在每个测量的图像信号和参考之间计算相关性，并且图像信号被修改在相关性的基础上。

5. 发明授权

US4939462A Method and apparatus for MRI 失效
标题翻译： MRI的方法和装置
公开(公告)号：US4939462A
公开(公告)日：1990-07-03
申请号：US376216
申请日：1989-07-03
申请人： Akira Maeda , Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi
发明人： Akira Maeda , Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi
IPC分类号： A61B5/055 , G01R33/48 , G01R33/54
CPC分类号： G01R33/4833
摘要： In order to narrow the dynamic range of an NMR signal and to provide MRI of low cost and high image quality without inducing the distortions of an image other than distortion of phase which can be corrected or the degradations of the measurement accuracies of various parameters, a coil for generating an inhomogeneous magnetic field which varies slowly within region to-be-imaged is added to a coil for generating a static magnetic field of high homogeneity, and current to flow through the former coil is changed so as to control the inhomogeneous magnetic field.

6. 发明授权

US4724388A Magnetic resonance imaging method 失效
标题翻译：磁共振成像方法
公开(公告)号：US4724388A
公开(公告)日：1988-02-09
申请号：US869976
申请日：1986-06-02
申请人： Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi
发明人： Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi
IPC分类号： G01R33/565 , G01R33/20
CPC分类号： G01R33/56518 , G01R33/56563
摘要： In order to measure a static field distribution with one scanning operation and to make image distortion corrections with the static field distribution and a gradient field distribution simultaneously considered, an image is reconstructed using a spin echo signal produced under the condition that a time interval between a 90.degree. pulse and a 180.degree. pulse differs from an interval between the 180.degree. pulse and the time origin of the spin echo signal, the static field distribution is evaluated from the relation of distortions to phase errors free from a phase distortion attributed to the characteristic of a detecting part and a phase distortion attributed to the dynamic characteristic of the gradient field, a relations existing between the spatial distortion and phase distortion of the reconstructed image and a magnetic field distribution including the gradient field is obtained, and the distortion magnitude of the reconstructed image is evaluated from the measured magnetic field distribution.
摘要翻译：为了通过一次扫描操作测量静态场分布，并且同时考虑静态场分布和梯度场分布进行图像失真校正，使用自旋回波信号来重构图像，该自旋回波信号是在 90°脉冲和180°脉冲与180°脉冲与自旋回波信号的时间原点之间的间隔不同，静态场分布从失真和相位误差的关系来评估，该相位误差不包括归因于特性的相位失真得到归因于梯度场的动态特性的检测部分和相位失真，获得重建图像的空间失真和相位失真之间存在的关系以及包括梯度场的磁场分布，并且，从测量的磁场分布评估重建图像。

7. 发明授权

US4644278A Nuclear magnetic resonance imaging apparatus 失效
标题翻译：核磁共振成像装置
公开(公告)号：US4644278A
公开(公告)日：1987-02-17
申请号：US694743
申请日：1985-01-25
申请人： Koichi Sano , Tetsuo Yokoyama , Shimbu Yamagata , Koichi Haruna
发明人： Koichi Sano , Tetsuo Yokoyama , Shimbu Yamagata , Koichi Haruna
IPC分类号： A61B10/00 , A61B5/055 , G01R33/48 , G01R33/561 , G06T1/00 , G01R33/20
CPC分类号： G01R33/561
摘要： An NMR imaging apparatus is disclosed, which comprises imaging means for measuring a cross section of an object to be inspected with a high speed and for reconstructing an image of said cross section, means for specifying a region of interest in the image of the object to be inspected thus reconstructed by said imaging means, and gradient magnetic field control means for controlling a gradient of a magnetic field so that the gradient of the magnetic field at the specified region of interest is substantially greater than that at the other regions, whereby an enlarged image with high image quality at the region of interest is obtained by reconstructing an image of said region of interest after having raised the gradient of the magnetic field at least at said region of interest by means of said gradient magnetic field control means.
摘要翻译：公开了一种NMR成像装置，其包括：成像装置，用于以高速度测量待检查对象的横截面，并重建所述横截面的图像，用于将对象的图像中的感兴趣区域指定为由所述成像装置重新检查，以及用于控制磁场梯度的梯度磁场控制装置，使得在特定感兴趣区域的磁场梯度大大大于其他区域的磁场梯度，由此增大通过利用所述梯度磁场控制装置至少在所述感兴趣区域提高磁场的梯度后，通过重建所述感兴趣区域的图像来获得感兴趣区域具有高图像质量的图像。

8. 发明授权

US5207222A Method and apparatus for measuring temperature of subject 失效
标题翻译：用于测量受试者温度的方法和装置
公开(公告)号：US5207222A
公开(公告)日：1993-05-04
申请号：US713316
申请日：1991-06-11
申请人： Hideaki Koizumi , Ryuzaburo Takeda , Koichi Sano , Tetsuo Yokoyama
发明人： Hideaki Koizumi , Ryuzaburo Takeda , Koichi Sano , Tetsuo Yokoyama
IPC分类号： G01K7/32 , A61B5/01 , A61B5/055 , G01N24/00 , G01R33/48
CPC分类号： G01R33/4804
摘要： Based on the relation that the higher the temperature of a portion to be measured, the lower becomes coherence of a nuclear spin at that portion, the present invention measures indirectly the temperature state of the portion to be measured from the change of intensity of NMR signals by utilizing this relationship. A transverse relaxation time is contained as one of the parameters in the relation between the signal intensity and the temperature; hence this transverse relaxation time is determined in advance for the portion to be measured and utilized in for the equation representing their relationship. This application discloses also an invention for determining a blood perfusion rate of the portion to be measured from the temperature data obtained in the manner described above.
摘要翻译：基于测量部分的温度越高，该部分的核自旋的相关性越低，本发明根据NMR信号的强度的变化间接地测量待测部分的温度状态通过利用这种关系。横向弛豫时间作为信号强度与温度之间关系的参数之一; 因此该横向弛豫时间预先被测量的部分用于表示它们的关系的方程式。本申请还公开了根据以上述方式获得的温度数据来确定待测量部分的血液灌注速率的发明。

9. 发明授权

US5115812A Magnetic resonance imaging method for moving object 失效
标题翻译：用于移动物体的磁共振成像方法
公开(公告)号：US5115812A
公开(公告)日：1992-05-26
申请号：US441972
申请日：1989-11-28
申请人： Koichi Sano , Akira Maeda , Tetsuo Yokoyama , Hideaki Koizumi
发明人： Koichi Sano , Akira Maeda , Tetsuo Yokoyama , Hideaki Koizumi
IPC分类号： G01R33/563 , G01R33/565 , G01R33/567
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, dephases 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 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.sub.E from excitation to generation of an echo peak within a measurement signal, and using this relationship, the application timing T.sub.E is obtained which makes minimum the echo peak shift quantity.

10. 发明授权

US4996480A Image reconstructing device for use in magnetic resonance imaging apparatus 失效
标题翻译：用于磁共振成像装置的图像重建装置
公开(公告)号：US4996480A
公开(公告)日：1991-02-26
申请号：US418224
申请日：1989-10-06
申请人： Akira Maeda , Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi
发明人： Akira Maeda , Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi
IPC分类号： G01R33/54 , A61B5/055 , G01R33/32 , G01R33/485 , G01R33/565
CPC分类号： G01R33/56527 , G01R33/485
摘要： A magnetic resonance signal is detected at a plurality of different periods of time in accordance with the phase shift of a plurality of chemical shift components while varying the intensity of a gradient magnetic field with time, a plurality of magnetic resonance signal thus obtained are used for estimating a magnetic resonance signal due to only a predetermined chemical shift component, the phase rotation of the predetermined chemical shift component is corrected in the estimated resonance signal, and further a blur due to chemical shift components other than the predetermined one is corrected to obtain a tomogram formed of only the predetermined chemical shift component. Alternatively, one measured resonance signal is modified by an image reconstruction algorithm peculiar to each of a plurality of chemical shift components, to obtain tomograms corresponding to the chemical shift components.
摘要翻译：在随时间变化梯度磁场的强度的同时，根据多个化学位移分量的相移，在多个不同的时间段检测磁共振信号，由此得到的多个磁共振信号用于估计由于只有预定的化学位移分量而产生的磁共振信号，在估计的共振信号中校正预定化学位移分量的相位旋转，并且进一步校正由于除了预定的化学位移分量之外的化学位移分量的模糊以获得仅由预定的化学位移分量形成的断层图像。或者，通过对多个化学位移分量中的每一个特有的图像重构算法修改一个测量的共振信号，以获得对应于化学位移分量的断层图像。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式