公开(公告)号：US5345173A

公开(公告)日：1994-09-06

申请号：US922473

申请日：1992-07-31

申请人： Yoshitaka Bito ,  Kensuke Sekihara ,  Ryuichi Suzuki

发明人： Yoshitaka Bito ,  Kensuke Sekihara ,  Ryuichi Suzuki

IPC分类号： A61B5/055 ,  G01R33/48 ,  G01R33/54 ,  G01R33/565 ,  G01R33/20

CPC分类号： G01R33/56545

摘要： A data processing method for image reconstruction in an NMR apparatus for use in the medical field which reduces a computation quantity relating to data extrapolation when truncation artifacts are reduced by data extrapolation. The data processing method is utilized with an inspection apparatus including a magnetic field generation apparatus for generating each of a static magnetic field, gradient magnetic field and RF magnetic field, a signal detection device for detecting NMR signals from an inspection object, a computer for computing detection signals of the signal detection device and for outputting the result of computation by the computer, for obtaining an image by effecting inverse Fourier transform for a measurement signal row representing data of spatial frequency space. An evaluation value representing the magnitude of ringing which occurs because a measured spatial frequency domain is limited in the spatial frequency space is utilized for comparison with a threshold value and signals are extrapolated into spatial frequency domains which are located outside of a measured spatial frequency domain by use of coefficients computed from the signals of the measured spatial frequency domain only when the evaluation is greater than the threshold value so that an image in which the ringing thereof is corrected is obtained.

摘要翻译： 一种用于医疗领域的NMR装置中的图像重构的数据处理方法，其通过数据外推减少了截断伪影而减少与数据外推相关的计算量。 数据处理方法与包括用于产生静态磁场，梯度磁场和RF磁场中的每一个的磁场产生装置的检查装置一起使用，用于检测来自检查对象的NMR信号的信号检测装置，用于计算 信号检测装置的检测信号，并且用于输出计算机的计算结果，以便通过对表示空间频率空间的数据的测量信号行进行逆傅里叶变换来获得图像。 用于表示在空间频率空间中被测量的空间频域被限制而发生的振铃幅度的评估值用于与阈值进行比较，并且将信号外推到位于测量的空间频域之外的空间频域中， 只有当评估大于阈值时才使用从测量的空间频域的信号计算的系数，从而获得校正其振铃的图像。

公开(公告)号：US09476956B2

公开(公告)日：2016-10-25

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 ,  A61B5/055 ,  G01R33/565 ,  G01R33/561

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：US20110121834A1

公开(公告)日：2011-05-26

申请号：US13054474

申请日：2009-07-22

申请人： Yoshihisa Soutome ,  Hideta Habara ,  Yoshitaka Bito

发明人： Yoshihisa Soutome ,  Hideta Habara ,  Yoshitaka Bito

IPC分类号： G01R33/44

CPC分类号： G01R33/365 ,  G01R33/3415 ,  G01R33/3657

摘要： There is provided a high-frequency coil of an MRI device, which can easily and highly reproducibly reduce electromagnetic coupling between adjacent surface coils among a plurality of surface coils disposed with intervals. An electromagnetic decoupling coil that can generate a magnetic flux for canceling a magnetic flux generated by one of the adjacent surface coils and interlinking with the other surface coil is disposed between the adjacent surface coils. The electromagnetic decoupling coil is provided with a capacitor, and is tuned by means of the capacitor so that the electromagnetic coupling should be minimized in such a range that the resonance frequency thereof should be lower than the resonance frequency of the surface coils.

摘要翻译： 提供了一种MRI装置的高频线圈，其可以容易且高度可重复地减少间隔设置的多个表面线圈中的相邻表面线圈之间的电磁耦合。 可以在相邻的表面线圈之间设置电磁去耦线圈，该电磁去耦线圈可以产生用于消除由相邻的表面线圈之一产生的磁通并与另一个表面线圈相互连接的磁通量。 电磁去耦线圈设置有电容器，并通过电容器进行调谐，使得电磁耦合应在其共振频率应低于表面线圈的谐振频率的范围内最小化。

公开(公告)号：US20110112393A1

公开(公告)日：2011-05-12

申请号：US13054155

申请日：2009-07-22

申请人： Yo Taniguchi ,  Yoshitaka Bito ,  Shoichi Miyawaki ,  Hiroyuki Takeuchi ,  Suguru Yokosawa

发明人： Yo Taniguchi ,  Yoshitaka Bito ,  Shoichi Miyawaki ,  Hiroyuki Takeuchi ,  Suguru Yokosawa

IPC分类号： A61B5/055

CPC分类号： G01R33/56518 ,  A61B5/055 ,  A61B5/7257 ,  G01R33/5616 ,  G01R33/56341 ,  G01R33/56563

摘要： In the diffusion-weighted imaging, amounts of distortion and amounts of phase offset of k-space data due to a temporally changing magnetic field error induced by eddy currents and vibrations associated with application of a diffusion-weighted gradient magnetic field pulse are corrected with good precision to improve image quality. Characteristic data for correcting distortion of k-space data are calculated for every position in the slice direction as peak shifts of projections observed between the cases of applying and not applying an MPG pulse. As the characteristic data, amounts of distortion in the read-out direction and the phase encoding direction and phase offset amounts in a slice plane are calculated.

摘要翻译： 在扩散加权成像中，由于由涡流引起的瞬时变化的磁场误差和与施加扩散加权梯度磁场脉冲相关的振动引起的k空间数据的失真量和相位偏移量被校正为良好 精度提高图像质量。 针对切片方向上的每个位置计算用于校正k空间数据的失真的特征数据，作为施加和不施加MPG脉冲的情况之间观察到的投影的峰值偏移。 作为特征数据，计算读取方向上的失真量和切片平面中的相位编码方向和相位偏移量。

公开(公告)号：US20070271214A1

公开(公告)日：2007-11-22

申请号：US11798889

申请日：2007-05-17

申请人： Shigeo Sumino ,  Tomohiro Yasuda ,  Yoshitaka Bito ,  Yoshiki Niwa

发明人： Shigeo Sumino ,  Tomohiro Yasuda ,  Yoshitaka Bito ,  Yoshiki Niwa

IPC分类号： G06F17/30

CPC分类号： G06F19/3456 ,  G06F16/40 ,  G06F19/326

摘要： A clinical trial support system suitable for the investigation of an adverse event or the like. A clinical trial database stores: information about sponsors; information about trial sites; product information including the product names, classification, chemical structure, and pharmacokinetics of trial drugs; trial information including trial name, target disease, phase, and completed status; contract information including trial site name, contracted number of cases, and completed status; trial subject information including sex, birth of date, height, weight, and completed status; and visit information including visit date, inspection result, and medical imaging data. An information control unit distributes a search interface for the analysis of an adverse event to the trial sponsor and a retrieval result to the trial site.

摘要翻译： 适用于不良事件等的调查的临床试验支援系统。 临床试验数据库存储：关于赞助商的信息; 有关试验场的信息; 产品信息，包括试药的产品名称，分类，化学结构和药代动力学; 试用信息包括试验名称，目标疾病，阶段和完成状态; 合同信息包括试验地点名称，合同案件数量和完成情况; 试验主题信息包括性别，出生日期，身高，体重和完成状态; 访问信息，包括访问日期，检查结果和医学影像数据。 信息控制单元将用于分析不良事件的搜索界面分发给试用发起者，并将检索结果分发到试用站点。

公开(公告)号：US20140191756A1

公开(公告)日：2014-07-10

申请号：US14240441

申请日：2012-07-27

申请人： Suguru Yokosawa ,  Yo Taniguchi ,  Yoshitaka Bito ,  Yoshihisa Soutome

发明人： Suguru Yokosawa ,  Yo Taniguchi ,  Yoshitaka Bito ,  Yoshihisa Soutome

IPC分类号： G01R33/483

CPC分类号： G01R33/483 ,  A61B5/0037 ,  A61B5/0042 ,  A61B5/055 ,  G01R33/543

摘要： A technique in a medical imaging apparatus being capable of setting any plane in three-dimensional space as an imaging slice is provided, allowing an automatically-set imaging slice to be configured to suit user's preferences, and determine a position of the imaging slice being configured, with respect to an imaging target subject automatically with a high degree of accuracy. Reference information for specifying the imaging slice, set by the user for each imaging site, is associated with the anatomical feature of the imaging site, so as to generate an imaging slice parameter. Upon actual imaging, the imaging slice parameter and the anatomical feature of the imaging target subject obtained by scout imaging are used to determine the imaging slice position of the imaging target subject.

摘要翻译： 提供能够将三维空间中的任何平面设置为成像切片的医疗成像设备中的技术，允许自动设置的成像切片被配置为适合用户的偏好，并且确定被配置的成像切片的位置 ，相对于成像目标物体自动地以高精度。 用于指定用于每个成像部位的用户的成像切片的参考信息与成像部位的解剖特征相关联，以便生成成像切片参数。 在实际成像时，使用通过侦察成像获得的成像目标对象的成像切片参数和解剖特征来确定成像目标对象的成像切片位置。

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。