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1. 发明授权

US5655532A Magnetic resonance imaging apparatus and its method 失效
标题翻译：磁共振成像装置及其方法
公开(公告)号：US5655532A
公开(公告)日：1997-08-12
申请号：US448111
申请日：1995-05-22
申请人： Yukihiro Yasugi , Koji Kajiyama , Hiroyuki Takeuchi
发明人： Yukihiro Yasugi , Koji Kajiyama , Hiroyuki Takeuchi
IPC分类号： A61B5/055 , G01R33/48 , G01R33/54 , G01R33/56 , G01R33/561
CPC分类号： G01R33/5602 , G01R33/482 , G01R33/56
摘要： A magnetic resonance imaging method includes the steps of setting a repetition time in accordance with an intensity of an encoding gradient magnetic field, applying a gradient magnetic field for a slice, the set encoding gradient magnetic field, a readout gradient magnetic field, and RF pulses to a subject in a predetermined sequence of the set repetition time, measuring nuclear magnetic resonance (NMR) signals inside the subject in a full encode range with a first repetition time, continuously measuring, at least one time, NMR signals in a first range containing a zero encoding quantity and sandwiched between two predetermined intensities of the encoding gradient magnetic field with a repetition time which is different from the first repetition time, and reconstructing an image by combining the measured NMR signals with one another.
摘要翻译：磁共振成像方法包括以下步骤：根据编码梯度磁场的强度设置重复时间，对切片施加梯度磁场，设定编码梯度磁场，读出梯度磁场和RF脉冲以设定的重复时间的预定顺序对对象进行测量，在第一重复时间的全编码范围内测量受试者内部的核磁共振（NMR）信号，连续测量至少一次在包含第一范围的第一范围内的NMR信号零编码量并且夹在具有不同于第一重复时间的重复时间的编码梯度磁场的两个预定强度之间，并且通过将测量的NMR信号彼此组合来重构图像。

2. 发明授权

US5543709A Magnetic resonance imaging method and apparatus for generating a plurality of single spin echoes 失效
标题翻译：用于产生多个单个自旋回波的磁共振成像方法和装置
公开(公告)号：US5543709A
公开(公告)日：1996-08-06
申请号：US274281
申请日：1994-07-13
申请人： Koji Kajiyama
发明人： Koji Kajiyama
IPC分类号： A61B5/055 , G01R33/48 , G01R33/561
CPC分类号： G01R33/561
摘要： An object is repeatedly excited by a 90-degree pulse and a plurality of spin echoes are obtained by a 180-degree pulse each time the excitation is repeated. The spin echoes are differently phase-encoded and the spin echoes thus generated are assigned to a substantial half portion of a raw image data space in a phase-encoding direction, the remaining substantial half of data being estimated from the data in that portion. The data covering the raw image data space are used to produce a corresponding image of the object.
摘要翻译：物体被90度脉冲重复激发，并且每次重复激励时，通过180度脉冲获得多个自旋回波。自旋回波是不同的相位编码的，并且由此生成的自旋回波被分配给相位编码方向上的原始图像数据空间的大部分部分，剩余的大部分数据是从该部分的数据估计的。覆盖原始图像数据空间的数据用于产生对象的相应图像。

3. 发明授权

US07635978B2 Nuclear magnetic resonance imaging apparatus and method 失效
标题翻译：核磁共振成像装置及方法
公开(公告)号：US07635978B2
公开(公告)日：2009-12-22
申请号：US11918082
申请日：2006-03-22
申请人： Tetsuhiko Takahashi , Yumiko Yatsui , Koji Kajiyama , Hideki Kumai
发明人： Tetsuhiko Takahashi , Yumiko Yatsui , Koji Kajiyama , Hideki Kumai
IPC分类号： G01V3/00
CPC分类号： G01R33/56375 , G01R33/56383
摘要： A control means controls an imaging means for taking an image of a test object by a magnetic resonance, the test object being placed in an imaging space, and a transfer means that moves the test object, and on the basis of a difference (moving distance) between a position of the transfer means at the time of receiving a command of pausing the imaging and a position of the transfer means at the time of resuming the imaging, the control means controls the position of the transfer means or the position for imaging at the time of resuming, in such a manner that missing of data 503 caused by the difference can be compensated. With this configuration, it is possible to provide an MRI apparatus that is provided with an imaging pause function, and even when the pause function is activated, there is data consistency between the data before the pausing and the data after the resuming, thereby obtaining a high quality image.
摘要翻译：控制装置控制用于通过磁共振，测试对象被放置在成像空间中的测试对象的图像和移动测试对象的传送装置，并且基于差异（移动距离）在接收到暂停成像的命令时的传送装置的位置与恢复成像时的传送装置的位置之间，控制装置控制传送装置的位置或成像的位置以这种方式恢复的时间，可以补偿由差异引起的数据503的丢失。通过该结构，能够提供具有成像暂停功能的MRI装置，即使暂停功能被激活，暂停前的数据与恢复后的数据之间存在数据一致性，从而获得高质量的图像。

4. 发明申请

US20090066328A1 Nuclear Magnetic Resonance Imaging Apparatus and Method 失效
标题翻译：核磁共振成像装置及方法
公开(公告)号：US20090066328A1
公开(公告)日：2009-03-12
申请号：US11918082
申请日：2006-03-22
申请人： Tetsuhiko Takahashi , Yumiko Yatsui , Koji Kajiyama , Hideki Kumai
发明人： Tetsuhiko Takahashi , Yumiko Yatsui , Koji Kajiyama , Hideki Kumai
IPC分类号： G01R33/48
CPC分类号： G01R33/56375 , G01R33/56383
摘要： A control means controls an imaging means for taking an image of a test object by a magnetic resonance, the test object being placed in an imaging space, and a transfer means that moves the test object, and on the basis of a difference (moving distance) between a position of the transfer means at the time of receiving a command of pausing the imaging and a position of the transfer means at the time of resuming the imaging, the control means controls the position of the transfer means or the position for imaging at the time of resuming, in such a manner that missing of data 503 caused by the difference can be compensated. With this configuration, it is possible to provide an MRI apparatus that is provided with an imaging pause function, and even when the pause function is activated, there is data consistency between the data before the pausing and the data after the resuming, thereby obtaining a high quality image.
摘要翻译：控制装置控制用于通过磁共振，测试对象被放置在成像空间中的测试对象的图像和移动测试对象的传送装置，并且基于差异（移动距离）在接收到暂停成像的命令时的传送装置的位置与恢复成像时的传送装置的位置之间，控制装置控制传送装置的位置或成像的位置以这种方式恢复的时间，可以补偿由差异引起的数据503的丢失。通过该结构，能够提供具有成像暂停功能的MRI装置，即使暂停功能被激活，暂停前的数据与恢复后的数据之间存在数据一致性，从而获得高质量的图像。

5. 发明授权

US07821267B2 Magnetic resonance imaging method and apparatus 有权
标题翻译：磁共振成像方法和装置
公开(公告)号：US07821267B2
公开(公告)日：2010-10-26
申请号：US11916130
申请日：2006-05-30
申请人： Yumiko Yatsui , Koji Kajiyama , Hideki Kumai , Tetsuhiko Takahashi
发明人： Yumiko Yatsui , Koji Kajiyama , Hideki Kumai , Tetsuhiko Takahashi
IPC分类号： G01V3/00
CPC分类号： A61B5/0555 , G01R33/4833 , G01R33/4835 , G01R33/56375 , G01R33/56383
摘要： In an imaging according to the step moving method, a slice imaging condition with respect to each station is optimized, thereby enabling an efficient imaging. A controller of an MRI apparatus displays positioning frames 601 to 606, and operation handles 607 and 608 thereof, in order to set a slice imaging condition at every various positions (stations) of a table on which a test object is mounted. By manipulating the positioning frames and the operation handles via I/O unit, the slice imaging condition is set. According to this slice imaging condition, imaging at each station position of the table is executed.
摘要翻译：在根据步进移动方法的成像中，优化相对于每个站的切片成像条件，从而能够进行有效的成像。 MRI装置的控制器显示定位帧601至606及其操作手柄607和608，以便在安装有测试对象的表的每个各个位置（站）处设置切片成像条件。通过I / O单元操作定位框和操作手柄，设置切片成像条件。根据该切片成像条件，执行表的各台位置的成像。

6. 发明授权

US5431163A Magnetic resonance imaging method and apparatus 失效
标题翻译：磁共振成像方法和装置
公开(公告)号：US5431163A
公开(公告)日：1995-07-11
申请号：US161398
申请日：1993-12-06
申请人： Koji Kajiyama
发明人： Koji Kajiyama
IPC分类号： A61B5/055 , G01N24/08 , G01R33/32 , G01R33/54 , G01R33/56 , G01R33/561 , G01R33/565
CPC分类号： G01R33/561 , G01R33/482 , G01R33/56509
摘要： A raw data space or k-space having a frequency encoding axis and a phase encoding axis orthogonal to each other are divided into three regions in the direction of the phase encoding axis which are composed of a central region and two side regions on both sides of the central region. The central region is occupied by one of an even-numbered echo group and an odd-numbered echo group, while each of the side regions is occupied by the other echo group. Thereby, artifacts are reduced which are caused by moving or flowing spins.
摘要翻译：具有彼此正交的频率编码轴和相位编码轴的原始数据空间或k空间被划分为相位编码轴方向上的三个区域，它们由中心区域和两侧的两个侧面区域组成中部地区。中央区域由偶数回波群和奇数回波群中的一个占据，而每个侧面区域被另一个回波群占用。因此，由于移动或流动的旋转引起的伪影减少。

7. 发明授权

US5357200A Magnetic resonance imaging method and apparatus 失效
标题翻译：磁共振成像方法和装置
公开(公告)号：US5357200A
公开(公告)日：1994-10-18
申请号：US67624
申请日：1993-05-28
申请人： Koji Kajiyama
发明人： Koji Kajiyama
IPC分类号： A61B5/055 , G01R33/48 , G01R33/561 , G01R33/20
CPC分类号： G01R33/561
摘要： An object is repeatedly excited by a 90-degree pulse and a plurality of spin echoes are obtained by a 180-degree pulse each time the excitation is repeated. The spin echoes are differently phase-encoded and the spin echoes thus generated are assigned to a substantial half portion of a raw image data space in a phase-encoding direction, the remaining substantial half of data being estimated from the data in that portion. The data covering the raw image data space are used to produce a corresponding image of the object.
摘要翻译：物体被90度脉冲重复激发，并且每次重复激励时，通过180度脉冲获得多个自旋回波。自旋回波是不同的相位编码的，并且由此生成的自旋回波被分配给相位编码方向上的原始图像数据空间的大部分部分，剩余的大部分数据是从该部分的数据估计的。覆盖原始图像数据空间的数据用于产生对象的相应图像。

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