专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

101. 发明授权

US5275164A Multi-dimensional magnetic resonance imaging method and apparatus for same 失效
标题翻译：多维磁共振成像方法及装置相同
公开(公告)号：US5275164A
公开(公告)日：1994-01-04
申请号：US386380
申请日：1989-07-28
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 , G01R33/56 , G01R33/561 , G01R33/567 , G06T11/00
CPC分类号： G01R33/5673 , G01R33/56 , G01R33/561
摘要： A method and apparatus for MRI imaging capable of reducing the time between end of measurement and completion of image reconstruction by performing part of image reconstruction calculation in parallel with measurement of magnetic resonance signals, which particularly performs image reconstruction calculation up to (N-1) dimensions of N-dimensional image reconstruction calculation in parallel with measurement of signals and performs the image reconstruction calculation for the remaining one-dimensional direction after the measurement has been finished. When calculation for the last one dimension is performed, the (N-1)-dimensional images for which image reconstruction has been completed are successively displayed, and the image reconstruction calculation for the remaining one-dimensional direction is carried out not by FFT but by discrete Fourier transform, or such that the order of signal measurement is made in the bit reversed order for the order of phase encoding quantity, and thereby, a further portion of the image reconstruction calculation is carried out in parallel with the signal measurement.
摘要翻译：一种用于MRI成像的方法和装置，其能够通过与磁共振信号的测量并行地执行图像重建计算的一部分来减少测量结束和完成图像重建之间的时间，其特别地执行直到（N-1）的图像重建计算，与维度信号并行地进行N维图像重建计算的尺寸，并且在测量完成之后对剩余的一维方向执行图像重建计算。当执行最后一个维度的计算时，连续地显示已经完成图像重建的（N-1）维图像，并且不通过FFT进行剩余一维方向的图像重建计算，而是通过离散傅里叶变换，或者相位编码量的顺序，以比特相反的顺序进行信号测量的顺序，从而与信号测量并行地进行图像重构计算的另一部分。

102. 发明授权

US5254948A 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：US5254948A
公开(公告)日：1993-10-19
申请号：US660084
申请日：1991-02-25
申请人： Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi
发明人： Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi
IPC分类号： G01R33/567 , G01V3/00
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。

103. 发明授权

US5189369A NMR imaging method of low flow rate fluid 失效
标题翻译：低流速液体的NMR成像方法
公开(公告)号：US5189369A
公开(公告)日：1993-02-23
申请号：US671091
申请日：1991-03-18
申请人： Atsushi Takane , Hideaki Koizumi , Koichi Sano
发明人： Atsushi Takane , Hideaki Koizumi , Koichi Sano
IPC分类号： A61B5/055 , G01R33/32 , G01R33/56 , G01R33/563
CPC分类号： G01R33/563 , G01R33/56
摘要： An NMR imaging method of low flow rate fluid by measuring a time-reversed FID signal in a steady state free precession (SSFP) state comprises the steps of imaging in a dephase sequence, a rephase sequence or both of them, and processing the resulting image data by a maximum intensity projection method, a minimum intensity projection method or an image subtraction method to extract image data of fluid.
摘要翻译：通过在稳态自由进动（SSFP）状态下测量时间反转FID信号的低流量流体的NMR成像方法包括以去相序序列，重新相位序列或它们两者成像的步骤，并处理所得到的图像通过最大强度投影法，最小强度投影法或图像减法方法提取数据，以提取流体的图像数据。

104. 发明授权

US5113137A Method and apparatus for reducing image noises 失效
标题翻译：降低图像噪声的方法和装置
公开(公告)号：US5113137A
公开(公告)日：1992-05-12
申请号：US579581
申请日：1990-09-10
申请人： Hideaki Koizumi , Koichi Sano , Tetsuo Yokoyama , Kazuya Sukegawa
发明人： Hideaki Koizumi , Koichi Sano , Tetsuo Yokoyama , Kazuya Sukegawa
IPC分类号： G01R33/32 , A61B5/055 , A61B6/02 , G01R33/56 , H05G1/60
CPC分类号： G01R33/56 , A61B6/022 , H05G1/60
摘要： There is provided an image noise reduction method for improving the signal-to-noise ratio of an image when observed. The image signal of an identical region is measured twice at different times. Images obtained by respective measurements and seen from an identical visual point are so juxtaposed on an identical plane as to form two sheets. By seeing the two sheets of images with parallax changed directly or through stereo glass, the effective signal components of the images are focused on the same plane whereas only noise components are dispersed in a direction perpendicular to the plane.
摘要翻译：提供了一种用于在观察时改善图像的信噪比的图像噪声降低方法。相同区域的图像信号在不同时间测量两次。通过各自的测量得到的图像和从相同的视点观察到的图像被并置在相同的平面上以形成两张纸。通过直视或立体玻璃观看视差的两张图像，图像的有效信号分量聚焦在同一平面上，而只有噪声分量在垂直于平面的方向上分散。

105. 发明授权

US5016637A MRI method 失效
标题翻译： MRI方法
公开(公告)号：US5016637A
公开(公告)日：1991-05-21
申请号：US356418
申请日：1989-05-25
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： A61B10/00 , A61B5/055 , G01R33/48 , G01R33/563 , G01R33/567
CPC分类号： G01R33/5673 , G01R33/563
摘要： An MRI method is disclosed, by which, when liquid moving in a body to be examined stays in a predetermined region, this region is excited by using the nuclear magnetic resonance phenomenon and when the liquid thus excited moves from that excited region, a nuclear magnetic resonance signal produced by the excited spin and emitted during the relaxation time thereof is detected.
摘要翻译：公开了一种MRI方法，通过该方法，当待检查的体内移动的液体停留在预定区域时，通过使用核磁共振现象来激发该区域，并且当该激发的液体从该激发区域移动时，检测在其弛豫时间期间由激发的自旋产生并发射的共振信号。

106. 发明授权

US5014007A Nuclear magnetic resonance imaging method and apparatus 失效
标题翻译：核磁共振成像方法及装置
公开(公告)号：US5014007A
公开(公告)日：1991-05-07
申请号：US412219
申请日：1989-09-25
申请人： Koichi Sano , Shimbu Yamagata , Tetsuo Yokoyama , Hideaki Koizumi
发明人： Koichi Sano , Shimbu Yamagata , Tetsuo Yokoyama , Hideaki Koizumi
IPC分类号： G01R33/563 , G01R33/565 , G01R33/567
CPC分类号： G01R33/56308 , G01R33/56316 , G01R33/565 , G01R33/56563
摘要： To display the information, as an image, regarding the moving portion of the object without the aid of the doctor, the image is reconstructed on the basis of the observed NMR signal and the image phase information is calculated from the image intensity information derived from the reconstructed image, and the phase information calculated is displayed as the image.
摘要翻译：为了在没有医生帮助的情况下作为图像显示关于物体的移动部分的信息，基于观察到的NMR信号重建图像，并且根据从图像强度信息导出的图像强度信息来计算图像相位信息重建图像，并且计算的相位信息被显示为图像。

107. 发明授权

US4998065A Non-destructive sectional shape inspecting method and apparatus 失效
标题翻译：非破坏性截面形状检查方法和装置
公开(公告)号：US4998065A
公开(公告)日：1991-03-05
申请号：US369253
申请日：1989-06-20
申请人： Hideaki Koizumi
发明人： Hideaki Koizumi
IPC分类号： A61B5/055 , G01B1/00 , G01B7/00 , G01B7/28 , G01N24/00 , G01R33/44
CPC分类号： G01B1/00 , G01B7/28 , G01R33/44 , G01N24/084 , G01N24/085
摘要： A non-destructive sectional shape inspecting apparatus and method. An object to be inspected is internally and/or externally filled with a material capable of reradiating a nuclear magnetic resonance signal, whereon high frequency pulses and gradient magnetic fields are applied to obtain a nuclear magnetic resonance signal which is processed into an image signal. A portion of the image signals where no nuclear magnetic resonance signal makes appearance is extracted to be utilized for plotting the sectional shape of the object under test.
摘要翻译：非破坏性截面形状检查装置及方法。要被检查的物体在内部和/或外部填充有能够重新辐射核磁共振信号的材料，其中施加高频脉冲和梯度磁场以获得被处理为图像信号的核磁共振信号。提取没有核磁共振信号出现的图像信号的一部分用于绘制被测物体的截面形状。

108. 发明授权

US4947837A Method of blood flow imaging 失效
标题翻译：血流成像方法
公开(公告)号：US4947837A
公开(公告)日：1990-08-14
申请号：US379674
申请日：1989-07-13
申请人： Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi
发明人： Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi
IPC分类号： A61B5/055 , A61B5/026 , G06T1/00
CPC分类号： A61B5/0263
摘要： The blood flow imaging method excites selectively a partial region of the body to be tested including blood vessels inside or outside of the view field of image, measures resonance signals by utilizing spins flowing out of the excited region, and images a blood vessel system based on the blood flow information included in the measured resonance signals. The method images only blood vessels through a single shot of scanning, thereby reducing the time for scanning and enabling the observation of finer vessels.
摘要翻译：血流成像方法选择性地激发被检体的部分区域，包括图像视野内部或外部的血管，通过利用从兴奋区域流出的旋转来测量共振信号，并且基于包括在所测量的共振信号中的血流信息。该方法通过单次扫描仅对血管进行成像，从而减少扫描时间并使观察更细小的血管。

109. 发明授权

US4914727A Method of magnetic resonance dynamic imaging 失效
标题翻译：磁共振动态成像方法
公开(公告)号：US4914727A
公开(公告)日：1990-04-03
申请号：US313439
申请日：1989-02-22
申请人： Koichi Sano , Akira Maeda , Tetsuo Yokoyama , Shigenobu Yanaka , Hideaki Koizumi
发明人： Koichi Sano , Akira Maeda , Tetsuo Yokoyama , Shigenobu Yanaka , Hideaki Koizumi
IPC分类号： G01R33/44 , A61B5/055 , A61B10/00 , G01R33/48 , G01R33/561
CPC分类号： G01R33/561 , G01R33/5617 , G01R33/5619
摘要： A method of MR dynamic imaging comprises the steps of uniformly dividing one scan which is a minimum measurement unit in generating one image data into a plurality of cycles, sequentially extracting one-scan data which are staggered by a predetermined number of cycles, from a series of data derived by repeating the scan a plurality of times in such a manner that the measurement data in each cycle includes high frequency component and low frequency component of the image, and generating image data from the extracted data.
摘要翻译： MR动态成像的方法包括以下步骤：将作为最小测量单位的一个扫描均匀地划分为将多个循环中的一个图像数据生成一个图像数据，从一系列的顺序提取以预定数量的周期交错的一个扫描数据通过多次重复扫描得到的数据，使得每个周期中的测量数据包括图像的高频分量和低频分量，并且从提取的数据生成图像数据。

110. 发明授权

US4875012A Image reconstruction method in nuclear magnetic resonance imaging system 失效
标题翻译：核磁共振成像系统中的图像重建方法
公开(公告)号：US4875012A
公开(公告)日：1989-10-17
申请号：US153199
申请日：1988-02-08
申请人： Akira Maeda , Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi , Hirotaka Mizuno
发明人： Akira Maeda , Koichi Sano , Tetsuo Yokoyama , Hideaki Koizumi , Hirotaka Mizuno
IPC分类号： F02B3/06 , G01R33/56 , G01R33/565 , G01R33/20
CPC分类号： G01R33/56 , G01R33/56527 , G01R33/56563 , F02B3/06
摘要： In an nuclear magnetic resonance imaging system for acquiring a tomographic image of an object of interest at a high speed by use of time-varying gradient magnetic fields, a weighting factor is used in reconstructing an image through the calculation of a correlation of data of a detected nuclear magnetic resonance signal with data of a reference signal, thereby controlling the point spread function and/or the signal-to-noise ratio in each point on the reconstruction image. Also, the effect of relaxation, chemical shift and/or static magnetic field inhomegeneity, which would otherwise degradate the image quality, can be corrected. Further, a velocity of the object of interest at each point on the reconstruction image can be measured.
摘要翻译：在用于通过使用时变梯度磁场以高速获取感兴趣对象的断层图像的核磁共振成像系统中，通过计算图像的数据的相关性来使用加权因子来重建图像检测到具有参考信号的数据的核磁共振信号，从而控制重建图像中每个点上的点扩散函数和/或信噪比。此外，可以校正松弛，化学位移和/或静态磁场不均匀性的效果，否则会降低图像质量。此外，可以测量重建图像上的每个点处的感兴趣对象的速度。

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