公开(公告)号：US20100327871A1

公开(公告)日：2010-12-30

申请号：US12826055

申请日：2010-06-29

申请人： Mitsuharu Miyoshi

发明人： Mitsuharu Miyoshi

IPC分类号： G01R33/48

CPC分类号： G01R33/5659 ,  G01R33/5602 ,  G01R33/5635

摘要： A magnetic resonance imaging (MRI) apparatus sequentially transmits a plurality of radio frequency (RF) pulses for refocusing transverse magnetization of spins, and brings the transverse magnetization of the spins to longitudinal magnetization after the refocusing of the transverse magnetization of the spins.

摘要翻译： 磁共振成像（MRI）装置顺序地发送用于重新聚焦自旋横向磁化的多个射频（RF）脉冲，并且在自旋的横向磁化重新聚焦之后使自旋的横向磁化强度达到纵向磁化强度。

公开(公告)号：US07564242B2

公开(公告)日：2009-07-21

申请号：US12049776

申请日：2008-03-17

申请人： Mitsuharu Miyoshi ,  Aki Yamazaki

发明人： Mitsuharu Miyoshi ,  Aki Yamazaki

IPC分类号： G01V3/00

CPC分类号： G01R33/4828 ,  G01R33/5613

摘要： An MR data acquisition method for acquiring data D_φfat according to a steady-state pulse sequence specifying that a phase of an RF pulse is varied in order of 0, 1×φfat, 2×φfat, etc., wherein φfat=(2−TR/T_out+2×m)×π is established on an assumption that m denotes an integer equal to or larger than 0 and meets TR/(2×T_out)−1

摘要翻译： 一种MR数据采集方法，用于根据指定RF脉冲的相位以0，1xphifat，2xphifat等的顺序变化的稳态脉冲序列获取数据D_phifat，其中phifat =（2-TR / T_out + 2xm ）xpi是基于m表示等于或大于0并且满足TR /（2xT_out）-1

公开(公告)号：US07514925B2

公开(公告)日：2009-04-07

申请号：US11866805

申请日：2007-10-03

申请人： Mitsuharu Miyoshi

发明人： Mitsuharu Miyoshi

IPC分类号： G01V3/00

CPC分类号： G01R33/5635 ,  G01R33/5607 ,  G01R33/5617 ,  G01R33/56316 ,  G01R33/56509

摘要： With the objective of easily drawing a flow such as a bloodstream in a subject at low luminance, there is provided a magnetic resonance imaging apparatus including a static magnetic field forming unit, a transmission unit which transmits a plurality of inversion RF pulses to a subject lying in a static magnetic field plural times within one repetition time after transmission of one excitation RF pulse thereby to excite spins of the subject, a gradient magnetic field application unit, a data acquisition unit which acquires magnetic resonance signals encoded by the gradient magnetic field, and an image generation unit which generates an image of the subject based on the magnetic resonance signals acquired by the data acquisition unit. The gradient magnetic field application unit applies velocity encode gradient pulses inverted to one another in polarity to the subject within transmission interval times for the plural RF pulses transmitted to the subject.

摘要翻译： 为了容易地以较低的亮度在受试者中画出血流的流动，提供了一种磁共振成像装置，该磁共振成像装置包括静磁场形成单元，将多个反转RF脉冲发送到被摄体位置的发送单元 在一个激励RF脉冲发射之后的一个重复时间内多次静态磁场，从而激发被摄体的自旋，梯度磁场施加单元，获取由梯度磁场编码的磁共振信号的数据获取单元，以及 图像生成单元，其基于由数据获取单元获取的磁共振信号来生成被摄体的图像。 梯度磁场施加单元对发送到被摄体的多个RF脉冲的发送间隔时间内的对象，向对象施加极性反转的速度编码梯度脉冲。

公开(公告)号：US20080084206A1

公开(公告)日：2008-04-10

申请号：US11866805

申请日：2007-10-03

申请人： Mitsuharu Miyoshi

发明人： Mitsuharu Miyoshi

IPC分类号： G01R33/28

CPC分类号： G01R33/5635 ,  G01R33/5607 ,  G01R33/5617 ,  G01R33/56316 ,  G01R33/56509

摘要： With the objective of easily drawing a flow such as a bloodstream in a subject at low luminance, there is provided a magnetic resonance imaging apparatus including a static magnetic field forming unit, a transmission unit which transmits a plurality of inversion RF pulses to a subject lying in a static magnetic field plural times within one repetition time after transmission of one excitation RF pulse thereby to excite spins of the subject, a gradient magnetic field application unit, a data acquisition unit which acquires magnetic resonance signals encoded by the gradient magnetic field, and an image generation unit which generates an image of the subject based on the magnetic resonance signals acquired by the data acquisition unit. The gradient magnetic field application unit applies velocity encode gradient pulses inverted to one another in polarity to the subject within transmission interval times for the plural RF pulses transmitted to the subject.

摘要翻译： 为了容易地以较低的亮度在受试者中画出血流的流动，提供了一种磁共振成像装置，该磁共振成像装置包括静磁场形成单元，将多个反转RF脉冲发送到被摄体位置的发送单元 在一个激励RF脉冲发射之后的一个重复时间内多次静态磁场，从而激发被摄体的自旋，梯度磁场施加单元，获取由梯度磁场编码的磁共振信号的数据获取单元，以及 图像生成单元，其基于由数据获取单元获取的磁共振信号来生成被摄体的图像。 梯度磁场施加单元对发送到被摄体的多个RF脉冲的发送间隔时间内的对象，向对象施加极性反转的速度编码梯度脉冲。

公开(公告)号：US07336986B2

公开(公告)日：2008-02-26

申请号：US10672662

申请日：2003-09-26

申请人： Mitsuharu Miyoshi ,  Susumu Kosugi

发明人： Mitsuharu Miyoshi ,  Susumu Kosugi

IPC分类号： A61B5/05 ,  A61B19/00 ,  G01V3/00

CPC分类号： G01R33/4828 ,  G01R33/5613

摘要： An apparatus includes acquiring means for acquiring echo data of a plurality of views in which a phase difference between water and fat is 2π/m with spins within a subject brought to the SSFP state and repeating the acquisition for k=0 through M−1 with a step difference in a phase of an RF pulse of 2π·k/M; transforming means for conducting Fourier transformation on the echo data based on the phase step difference; separating means for separating water data and fat data respectively in F(0) term and F(1) term of the Fourier-transformed data using the phase difference between water and fat; adding means for obtaining a sum of absolute values of at least the water data or fat data in the F(0) term and F(1) term; and image producing means for producing an image based on the sum data.

摘要翻译： 一种装置，包括获取装置，用于获取多个视图中的回波数据，其中水和脂肪之间的相位差为2pi / m，与被摄体内的自旋进入SSFP状态，重复k = 0至M-1的采集， RF脉冲的相位差为2pi.k / M; 变换装置，用于基于相位差差对回波数据进行傅里叶变换; 分离装置，用于使用水和脂肪之间的相位差分别在傅立叶变换数据的F（0）项和F（1）项中分离水数据和脂肪数据; 添加用于获得F（0）项和F（1）项中的至少水分数据或脂肪数据的绝对值之和的装置; 以及图像产生装置，用于基于总和数据产生图像。

公开(公告)号：US06630827B1

公开(公告)日：2003-10-07

申请号：US09685815

申请日：2000-10-10

申请人： Mitsuharu Miyoshi ,  Koichi Oshio

发明人： Mitsuharu Miyoshi ,  Koichi Oshio

IPC分类号： G01V300

CPC分类号： G01R33/565 ,  G01R33/56563

摘要： To efficiently calculate a precise phase map, phase differentials are calculated for each pixel of pixel data of an image, corresponding integrals are calculated for each pixel, and the phase map is formed using this integral. A phase correction of the image is performed using the phase map, and separate water/lipid images are formed from the phase-corrected image.

摘要翻译： 为了有效地计算精确的相位图，对于图像的像素数据的每个像素计算相位差，对每个像素计算相应的积分，并且使用该积分形成相位图。 使用相位图执行图像的相位校正，并且从相位校正图像形成单独的水/脂肪图像。

公开(公告)号：US08558543B2

公开(公告)日：2013-10-15

申请号：US12544942

申请日：2009-08-20

申请人： Mitsuharu Miyoshi

发明人： Mitsuharu Miyoshi

IPC分类号： A61B5/055

CPC分类号： G01R33/5635 ,  G01R33/5602 ,  G01R33/5607 ,  G01R33/56316

摘要： A magnetic resonance imaging apparatus includes a coil control device that controls a transmission coil and a gradient coil such that (A) a longitudinal magnetization adjustment pulse sequence for setting a longitudinal magnetization component positive in value of a first body fluid smaller than a longitudinal magnetization component positive in value of a second body fluid is executed on the first and second body fluids, (B) a longitudinal magnetization reverse pulse for reversing the longitudinal magnetization components of the first and second body fluids is transmitted, and (C) a data acquisition pulse sequence for acquiring data of the first body fluid when an absolute value of the longitudinal magnetization component of the first body fluid flowing through an imaging area is larger than an absolute value of the longitudinal magnetization component of the second body fluid, is executed.

摘要翻译： 磁共振成像装置包括：线圈控制装置，其控制发送线圈和梯度线圈，使得（A）纵向磁化调整脉冲序列用于将第一体液的值的纵向磁化分量设定为小于纵向磁化分量 在第一和第二体液上执行第二体液的正值，（B）传送用于反转第一和第二体液的纵向磁化分量的纵向磁化反转脉冲，（C）数据采集脉冲 执行当流过成像区域的第一体液的纵向磁化分量的绝对值大于第二体液的纵向磁化分量的绝对值时用于获取第一体液的数据的顺序。

公开(公告)号：US20120133359A1

公开(公告)日：2012-05-31

申请号：US13307689

申请日：2011-11-30

申请人： Mitsuharu Miyoshi

发明人： Mitsuharu Miyoshi

IPC分类号： G01R33/48 ,  G01R33/28

CPC分类号： G01R33/4822 ,  G01R33/5617

摘要： A magnetic resonance imaging apparatus configured to divide a data acquisition region defined in a ky-kz plane into a plurality of regions and repeatedly execute a data acquisition sequence for acquiring echoes disposed in the regions is provided. The apparatus includes a divide unit configured to divide the data acquisition region into the plurality of regions by a plurality of curved lines defined with a point different from an origin point of the ky-kz plane as a reference.

摘要翻译： 一种磁共振成像装置，被配置为将在ky-kz平面中定义的数据获取区域划分为多个区域，并且重复地执行用于获取设置在所述区域中的回波的数据获取序列。 该装置包括：分割单元，被配置为通过以不同于ky-kz平面的原点的点定义的多个曲线作为参考，将数据采集区域划分为多个区域。

公开(公告)号：US08126532B2

公开(公告)日：2012-02-28

申请号：US12201637

申请日：2008-08-29

申请人： Mitsuharu Miyoshi

发明人： Mitsuharu Miyoshi

IPC分类号： A61B5/055 ,  G01V3/00

CPC分类号： G01R33/5635 ,  G01R33/5602 ,  G01R33/5607 ,  G01R33/56366

摘要： An MRI apparatus for imaging a bodily fluid flowing inside a subject includes a gradient coil which applies gradient pulses to the subject, a transmission coil which transmits RF pulses to the subject, and a control part which controls the gradient coil and the transmission coil. The control part controls the gradient coil and the transmission coil in order to: saturate longitudinal magnetization of the bodily fluid in a field of saturation positioned on an upstream flow of the bodily fluid during a saturation period, invert the direction of longitudinal magnetization of the bodily fluid in an imaging field of view positioned on an downstream flow of the bodily fluid during an inversion period following the saturation period, and acquire MR signals from the bodily fluid in the imaging field of view during a data acquisition period following the inversion period.

摘要翻译： 用于对在被检体内流动的体液进行成像的MRI装置，具有向对象施加梯度脉冲的梯度线圈，向对象发送RF脉冲的发送线圈，以及控制梯度线圈和发送线圈的控制部。 控制部分控制梯度线圈和传输线圈，以便在饱和时段内饱和位于体液上游流动的饱和场中的体液的纵向磁化，从而反转身体的纵向磁化方向 在饱和时段之后的反转期间位于体液下游流动的成像视野中的流体，并且在反转期间之后的数据采集周期期间，在成像视场中从身体获取MR信号。

公开(公告)号：US07405565B2

公开(公告)日：2008-07-29

申请号：US11533049

申请日：2006-09-19

申请人： Mitsuharu Miyoshi

发明人： Mitsuharu Miyoshi

IPC分类号： G01V3/00

CPC分类号： G01R33/5614 ,  G01R33/4838 ,  G01R33/5601 ,  G01R33/5602 ,  G01R33/5607 ,  G01R33/5635 ,  G01R33/5673

摘要： The present invention provides an MRI apparatus with selective saturation without affection to the integral value of gradient magnetic field in 1TR. The MRI apparatus comprises a signal acquisition device for applying static field, gradient magnetic field pulses and RF pulses to an object to acquire magnetic resonance signals therefrom, an image reconstruction device for reconstructing an image based on the magnetic resonance signals acquired, and a controller device for controlling both device. The controller device directs the signal acquisition device to apply gradient magnetic field pulses and RF pulses for selective saturation for a number of times prior to applying gradient magnetic field pulses and RF pulses for signal acquisition.

摘要翻译： 本发明提供了一种具有选择性饱和度的MRI装置，而不影响1TR中梯度磁场的积分值。 MRI装置包括用于向物体施加静态场，梯度磁场脉冲和RF脉冲以从其获取磁共振信号的信号采集装置，用于基于获取的磁共振信号重建图像的图像重建装置，以及控制器装置 用于控制两个设备。 在施加梯度磁场脉冲和RF脉冲进行信号采集之前，控制器装置引导信号采集装置施加梯度磁场脉冲和RF脉冲以选择性饱和多次。