公开(公告)号：US08693760B2

公开(公告)日：2014-04-08

申请号：US13380201

申请日：2010-06-22

申请人： Suguru Yokosawa ,  Yo Taniguchi ,  Yoshitaka Bito

发明人： Suguru Yokosawa ,  Yo Taniguchi ,  Yoshitaka Bito

IPC分类号： G06K9/00

CPC分类号： A61B5/055 ,  A61B5/0037 ,  A61B5/0042 ,  A61B5/4528 ,  A61B5/4533 ,  A61B2576/026 ,  G01R33/4833 ,  G01R33/543 ,  G01R33/546

摘要： There is provided a technique for, in a medical imaging apparatus enabling imaging of an arbitrary plane in a three-dimensional space, enabling automatic calculation of a slice position and automatic calculation of an extracting slice in MPR, without prolonging examination time. Two-dimensional scout scan similar to that used for manual setting of a slice position is performed, and the obtained scout images are processed to calculate a recommended slice position. Algorithms for the processing and various image processing procedures used for the processing are stored beforehand for every type of imaging region and every type of examination.

摘要翻译： 本发明提供一种技术，在能够对三维空间中的任意平面进行成像的医疗成像装置中，能够自动计算切片位置并自动计算MPR中的提取切片，而不延长检查时间。 执行类似于用于手动设置切片位置的二维侦察扫描，并且对所获得的侦察图像进行处理以计算推荐切片位置。 用于处理的算法和用于处理的各种图像处理程序预先存储在每种类型的成像区域和每种类型的检查中。

公开(公告)号：US20130314090A1

公开(公告)日：2013-11-28

申请号：US13984537

申请日：2012-01-19

申请人： Yo Taniguchi ,  Suguru Yokosawa ,  Yoshitaka Bito

发明人： Yo Taniguchi ,  Suguru Yokosawa ,  Yoshitaka Bito

IPC分类号： G01R33/56

CPC分类号： G01R33/56 ,  A61B5/055 ,  G01R33/5614 ,  G01R33/5616 ,  G01R33/56554 ,  G01R33/56572

摘要： In order to improve image quality, a technique for obtaining information for eliminating distortions of the k-space in the readout direction and the phase encoding direction caused by the waveform distortion of the gradient magnetic field pulse is provided. A pulse sequence for the main scan is used to repeatedly measure echoes with changing the time integral value of the dephasing pulse for the readout gradient magnetic field. In the above measurement, the phase encoding pulse is not made zero, but two-dimensional data are measured in the same manner as that of the main scan. By using the measured two-dimensional data, correction information for eliminating distortions of the k-space in the readout direction and the phase encoding direction caused by the waveform distortion of the gradient magnetic field pulse is calculated in each of the readout direction and the phase encoding direction.

摘要翻译： 为了提高图像质量，提供了一种用于获得用于消除由梯度磁场脉冲的波形失真引起的读出方向和相位编码方向上的k空间的失真的信息的技术。 用于主扫描的脉冲序列用于通过改变读出梯度磁场的去相位脉冲的时间积分值来重复测量回波。 在上述测量中，相位编码脉冲不为零，而是以与主扫描相同的方式测量二维数据。 通过使用所测量的二维数据，在每个读出方向和相位上计算用于消除由梯度磁场脉冲的波形失真引起的读出方向上的k空间的失真和相位编码方向的校正信息 编码方向。

公开(公告)号：US08339136B2

公开(公告)日：2012-12-25

申请号：US12599534

申请日：2008-04-28

申请人： Yo Taniguchi ,  Shinji Kurokawa ,  Suguru Yokosawa ,  Yoshitaka Bito

发明人： Yo Taniguchi ,  Shinji Kurokawa ,  Suguru Yokosawa ,  Yoshitaka Bito

IPC分类号： G01V3/00

CPC分类号： A61B5/0555 ,  A61B5/7207 ,  A61B5/7257 ,  G01R33/56375 ,  G01R33/56383 ,  G01R33/56563

摘要： In the continuous moving table imaging, an image is reconstructed with suppressed artifacts even in imaging under inhomogeneity of static magnetic field.In a magnetic resonance imaging apparatus, signals are measured with moving a table to obtain multiple data sets, and inverse Fourier transform of each data set is carried out in the read-out direction to obtain hybrid data. One-dimensional data are extracted from each hybrid data at a border with respect to the adjacent hybrid data, and correction values for corrections of discontinuity of signal intensity and phase at a border of hybrid data are obtained by using the one-dimensional data. Data obtained by inverse Fourier transform of each hybrid data are corrected by using the correction values, and an image showing continuity for signal intensity and phase is eventually obtained.

摘要翻译： 在连续移动台成像中，即使在静态磁场不均匀的成像下，也可以用抑制伪影重建图像。 在磁共振成像装置中，通过移动表来测量信号以获得多个数据集，并且在读出方向上执行每个数据集的傅立叶逆变换以获得混合数据。 从相对于相邻混合数据的边界处的每个混合数据中提取一维数据，并且通过使用一维数据获得混合数据边界处的信号强度和相位不连续性的校正值。 通过使用校正值校正每个混合数据的逆傅里叶变换获得的数据，并且最终获得表示信号强度和相位的连续性的图像。

公开(公告)号：US20100272336A1

公开(公告)日：2010-10-28

申请号：US12599534

申请日：2008-04-28

申请人： Yo Taniguchi ,  Shinji Kurokawa ,  Suguru Yokosawa ,  Yoshitaka Bito

发明人： Yo Taniguchi ,  Shinji Kurokawa ,  Suguru Yokosawa ,  Yoshitaka Bito

IPC分类号： G06K9/00

CPC分类号： A61B5/0555 ,  A61B5/7207 ,  A61B5/7257 ,  G01R33/56375 ,  G01R33/56383 ,  G01R33/56563

摘要： In the continuous moving table imaging, an image is reconstructed with suppressed artifacts even in imaging under inhomogeneity of static magnetic field.In a magnetic resonance imaging apparatus, signals are measured with moving a table to obtain multiple data sets, and inverse Fourier transform of each data set is carried out in the read-out direction to obtain hybrid data. One-dimensional data are extracted from each hybrid data at a border with respect to the adjacent hybrid data, and correction values for corrections of discontinuity of signal intensity and phase at a border of hybrid data are obtained by using the one-dimensional data. Data obtained by inverse Fourier transform of each hybrid data are corrected by using the correction values, and an image showing continuity for signal intensity and phase is eventually obtained.

摘要翻译： 在连续移动台成像中，即使在静态磁场不均匀的成像下，也可以用抑制伪影重建图像。 在磁共振成像装置中，通过移动表来测量信号以获得多个数据集，并且在读出方向上执行每个数据集的傅立叶逆变换以获得混合数据。 从相对于相邻混合数据的边界处的每个混合数据中提取一维数据，并且通过使用一维数据获得混合数据边界处的信号强度和相位不连续性的校正值。 通过使用校正值校正每个混合数据的逆傅里叶变换获得的数据，并且最终获得表示信号强度和相位的连续性的图像。

公开(公告)号：US20130214785A1

公开(公告)日：2013-08-22

申请号：US13881739

申请日：2011-10-26

申请人： Toru Shirai ,  Yoshitaka Bito ,  Satoshi Hirata ,  Yoshihisa Soutome ,  Yo Taniguchi

发明人： Toru Shirai ,  Yoshitaka Bito ,  Satoshi Hirata ,  Yoshihisa Soutome ,  Yo Taniguchi

IPC分类号： G01R33/36

CPC分类号： G01R33/3621 ,  A61B5/055 ,  G01R33/465 ,  G01R33/4828 ,  G01R33/485 ,  G01R33/5611

摘要： Images of two or more kinds of substances showing different chemical shifts, such as water image and metabolite image, are obtained without extending measurement time. For example, images of two or more kinds of desired substances showing different chemical shifts, such as water image and metabolite image, are obtained by one time of execution of an imaging sequence. In this execution, a pre-pulse is applied so that signals of the substances to be separated shift on the image, and magnetic resonance signals are received with receiver RF coils in a number not smaller than the number of types of the substances to be separated. An image reconstructed from the magnetic resonance signals is separated into images of the individual substances using sensitivity maps of the receiver RF coils. Then, correction is performed for returning the shifted image to the original position. Further, residual signals induced by errors generated in the measurement and the separation processing are eliminated by using spectroscopic images obtained after the separation.

摘要翻译： 在不延长测量时间的情况下，获得显示不同化学位移的两种或更多种物质的图像，例如水图像和代谢物图像。 例如，通过一次执行成像序列，可以获得显示不同化学位移的两种或更多种所需物质的图像，例如水图像和代谢物图像。 在该执行中，施加预脉冲，使得要分离的物质的信号在图像上移动，并且用接收器RF线圈​​接收不少于待分离物质的数量的数量的磁共振信号 。 使用接收机RF线圈的灵敏度图将从磁共振信号重构的图像分离成各个物质的图像。 然后，执行用于将移动的图像返回到原始位置的校正。 此外，通过使用分离后获得的分光图像来消除由测量和分离处理中产生的误差引起的残留信号。

公开(公告)号：US09198599B2

公开(公告)日：2015-12-01

申请号：US13642573

申请日：2011-04-20

申请人： Yo Taniguchi ,  Yoshitaka Bito ,  Tetsuhiko Takahashi ,  Takenori Murase

发明人： Yo Taniguchi ,  Yoshitaka Bito ,  Tetsuhiko Takahashi ,  Takenori Murase

IPC分类号： A61B5/055 ,  G01R33/56 ,  G01R33/561 ,  A61B5/00 ,  G06T5/00

CPC分类号： A61B5/055 ,  A61B5/0042 ,  A61B2576/026 ,  G01R33/5608 ,  G01R33/5613 ,  G06T5/009 ,  G06T2207/10088

摘要： Image processing techniques which enable various contrast control, by quantitatively handling a degree of phase enhancement in a contrast control as a post-processing of the image reconstruction. A complex operation is performed on each pixel value of a complex image obtained by an MRI, thereby generating an image with desired contrast. Intensity is controlled by increasing or decreasing the argument of the pixel value of each pixel by a constant amount, and the degree of phase enhancement is controlled by multiplying the phase (argument) of each pixel by a constant.

摘要翻译： 通过定量处理对比度控制中的相位增强程度作为图像重构的后处理，可以实现各种对比度控制的图像处理技术。 对通过MRI获得的复合图像的每个像素值执行复杂操作，从而生成具有期望对比度的图像。 通过将每个像素的像素值的自变量增加或减小恒定量来控制强度，并且通过将每个像素的相位（自变量）乘以常数来控制相位增强的程度。

公开(公告)号：US08188739B2

公开(公告)日：2012-05-29

申请号：US12519197

申请日：2007-06-29

申请人： Toru Shirai ,  Yoshitaka Bito ,  Yo Taniguchi ,  Satoshi Hirata

发明人： Toru Shirai ,  Yoshitaka Bito ,  Yo Taniguchi ,  Satoshi Hirata

IPC分类号： G01V3/00

CPC分类号： G01R33/485 ,  G01R33/483 ,  G01R33/5602 ,  G01R33/5607

摘要： A method for obtaining the most appropriate amplitude of signal suppression pulse, which suppresses unnecessary signals from the substance not subjected to measurement, highly accurately, swiftly and stably, and an MRI apparatus that enables the optimization are provided.A pulse amplitude adjusting means equipped in the MRI apparatus acquires signals while changing the amplitude of signal suppression pulse and calculates signal absolute values and phase values, and computes reference signals, which are polarized signal absolute values, based on the changes in signal phase values. This reference signals are subjected to polynomial fitting. A value which makes this fitting curve is 0 or closes to 0 is set as the optimal pulse amplitude.

摘要翻译： 提供了一种用于获得信号抑制脉冲的最适当振幅的方法，其能够高度准确，快速且稳定地抑制不被测量的物质的不必要的信号，并且提供能够进行优化的MRI装置。 装备在MRI装置中的脉冲幅度调整装置在改变信号抑制脉冲的振幅的同时获取信号，并且计算信号绝对值和相位值，并且基于信号相位值的变化来计算作为极化信号绝对值的参考信号。 该参考信号经过多项式拟合。 使该拟合曲线为0或接近0的值被设定为最佳脉冲幅度。

公开(公告)号：US20080009703A1

公开(公告)日：2008-01-10

申请号：US11797878

申请日：2007-05-08

申请人： Yoshitaka Bito ,  Hisaaki Ochi ,  Yo Taniguchi ,  Satoshi Hirata ,  Toru Shirai

发明人： Yoshitaka Bito ,  Hisaaki Ochi ,  Yo Taniguchi ,  Satoshi Hirata ,  Toru Shirai

IPC分类号： A61B5/05

CPC分类号： G01R33/485 ,  G01R33/5608

摘要： A magnetic resonance imaging system capable of conducting spectroscopic imaging with an improved SNR without degrading the spatial resolution includes edge-preserving filter processing means for spectroscopic imaging. The edge-preserving filter processing means executes processing including the steps of calculating spectral similarity in spatial neighborhoods (spatially neighboring voxels) at each voxel in spectroscopic imaging data, calculating a spectral weight according to the spectral similarity, and conducting weighted smoothing for compounding spectra of spatial neighborhoods (spatially neighboring voxels) according to the spectral weight.

摘要翻译： 能够在不降低空间分辨率的情况下以改善的SNR进行光谱成像的磁共振成像系统包括用于分光成像的边缘保留滤波处理装置。 边缘保留滤波处理装置执行处理，其包括以下步骤：计算分光成像数据中的每个体素的空间邻域（空间相邻体素）中的频谱相似度，根据频谱相似度计算频谱权重，以及进行加权平滑化， 根据光谱权重的空间邻域（空间相邻体素）。

公开(公告)号：US20130049753A1

公开(公告)日：2013-02-28

申请号：US13642573

申请日：2011-04-20

申请人： Yo Taniguchi ,  Yoshitaka Bito ,  Tetsuhiko Takahashi ,  Takenori Murase

发明人： Yo Taniguchi ,  Yoshitaka Bito ,  Tetsuhiko Takahashi ,  Takenori Murase

IPC分类号： G01R33/56

CPC分类号： A61B5/055 ,  A61B5/0042 ,  A61B2576/026 ,  G01R33/5608 ,  G01R33/5613 ,  G06T5/009 ,  G06T2207/10088

摘要： The present invention provides an image processing technique which enables various contrast control, by quantitatively handling a degree of phase enhancement in a contrast control as a post-processing of the image reconstruction. A complex operation is performed on each pixel value of a complex image obtained by an MRI, thereby generating an image with desired contrast. Intensity is controlled by increasing or decreasing the argument of the pixel value of each pixel by a constant amount, and the degree of phase enhancement is controlled by multiplying the phase (argument) of each pixel by a constant.

摘要翻译： 本发明提供一种图像处理技术，其能够通过定量地处理对比度控制中的相位增强程度来进行各种对比度控制，作为图像重构的后处理。 对通过MRI获得的复合图像的每个像素值执行复杂操作，从而生成具有期望对比度的图像。 通过将每个像素的像素值的自变量增加或减小恒定量来控制强度，并且通过将每个像素的相位（自变量）乘以常数来控制相位增强的程度。

公开(公告)号：US08030924B2

公开(公告)日：2011-10-04

申请号：US11797878

申请日：2007-05-08

申请人： Yoshitaka Bito ,  Hisaaki Ochi ,  Yo Taniguchi ,  Satoshi Hirata ,  Toru Shirai

发明人： Yoshitaka Bito ,  Hisaaki Ochi ,  Yo Taniguchi ,  Satoshi Hirata ,  Toru Shirai

IPC分类号： G01V3/00

CPC分类号： G01R33/485 ,  G01R33/5608

摘要： A magnetic resonance imaging system capable of conducting spectroscopic imaging with an improved SNR without degrading the spatial resolution includes edge-preserving filter processing means for spectroscopic imaging. The edge-preserving filter processing means executes processing including the steps of calculating spectral similarity in spatial neighborhoods (spatially neighboring voxels) at each voxel in spectroscopic imaging data, calculating a spectral weight according to the spectral similarity, and conducting weighted smoothing for compounding spectra of spatial neighborhoods (spatially neighboring voxels) according to the spectral weight.

摘要翻译： 能够在不降低空间分辨率的情况下以改善的SNR进行光谱成像的磁共振成像系统包括用于分光成像的边缘保留滤波处理装置。 边缘保留滤波处理装置执行处理，其包括以下步骤：计算分光成像数据中的每个体素的空间邻域（空间相邻体素）中的频谱相似度，根据频谱相似度计算频谱权重，以及进行加权平滑化， 根据光谱权重的空间邻域（空间相邻体素）。