公开(公告)号：US20070241755A1

公开(公告)日：2007-10-18

申请号：US11729841

申请日：2007-03-30

申请人： Masato Ikedo

发明人： Masato Ikedo

IPC分类号： G01V3/00

CPC分类号： G01R33/3875 ,  G01R33/243

摘要： A magnetic resonance imaging apparatus includes: a static magnetic field generating unit which generates a static magnetic field, a measuring unit which measures the strength distribution characteristic of the static magnetic field, a determination unit which determines correction amounts for first- to nth-order (n is a natural number of more than one) components of the strength distribution characteristic of the static magnetic field by fixing the correction amount for at least one of specific component which are part of the first- to nth-order components at a predetermined amount and determining the correction amounts for other components than the specific components on the basis of the strength distribution characteristic, and a correction magnetic field generating unit which generates correction magnetic fields to correct the static magnetic field on the basis of the correction amounts.

摘要翻译： 磁共振成像装置包括：产生静磁场的静磁场产生单元，测量静磁场的强度分布特性的测量单元，确定第一到第n次校正量的确定单元（ n是静态磁场的强度分布特性的多个成分的自然数，通过将作为第一至第n阶分量的一部分的特定分量中的至少一个的校正量固定为预定量，以及 基于强度分布特性确定与特定部件不同的其他部件的校正量;以及校正磁场产生单元，其基于校正量生成校正磁场以校正静磁场。

公开(公告)号：US09538936B2

公开(公告)日：2017-01-10

申请号：US12292527

申请日：2008-11-20

申请人： Tokunori Kimura ,  Masato Ikedo

发明人： Tokunori Kimura ,  Masato Ikedo

IPC分类号： A61B5/055 ,  A61B5/00 ,  G01R33/50 ,  G01R33/56 ,  G01R33/561 ,  G01R33/563

CPC分类号： A61B5/055 ,  A61B5/417 ,  A61B5/489 ,  G01R33/50 ,  G01R33/5601 ,  G01R33/5607 ,  G01R33/5608 ,  G01R33/5616 ,  G01R33/56316 ,  G01R33/5635

摘要： A magnetic resonance imaging apparatus includes an acquisition unit which acquires first data in which a tissue of interest has higher signal intensity than a background and second data in which the tissue of interest has lower signal intensity than the background, with regard to images of the same region of the same subject, and a generation unit which generates, on the basis of the first data and the second data, third data in which the contrast of the tissue of interest to the background is higher than those in the first and second data.

摘要翻译： 磁共振成像装置包括获取单元，其获取其中感兴趣组织具有比背景更高的信号强度的第一数据，其中感兴趣的组织具有比背景更低的信号强度的第二数据，关于该图像的图像 区域，以及生成单元，其基于第一数据和第二数据生成第三数据，其中感兴趣组织对背景的对比度高于第一和第二数据中的对比度。

公开(公告)号：US09201129B2

公开(公告)日：2015-12-01

申请号：US11898299

申请日：2007-09-11

申请人： Masato Ikedo ,  Tokunori Kimura

发明人： Masato Ikedo ,  Tokunori Kimura

IPC分类号： A61B5/05 ,  G01R33/563 ,  G01R33/54 ,  G01R33/56 ,  G01R33/561 ,  G01R33/565

CPC分类号： G01R33/56316 ,  G01R33/543 ,  G01R33/5602 ,  G01R33/5607 ,  G01R33/5611 ,  G01R33/5615 ,  G01R33/5635 ,  G01R33/56509 ,  G01R33/56545

摘要： A magnetic resonance imaging diagnostic apparatus includes a generating unit which generates a slice gradient magnetic field, a phase-encode gradient magnetic field and a read-out gradient magnetic field that extend in a slice axis, a phase-encode axis and a read-out axis, respectively, a setting unit which sets a dephase amount for weighting a signal-level decrease resulting from flows in the arteries and veins present in a region of interest of a subject, with respect to at least one axis selected form the slice axis, phase-encode axis and read-out axes, and a control unit which controls the generating unit by using a pulse sequence for a gradient echo system, which includes a dephase gradient-magnetic-field pulse that corresponds to the dephase amount set by the setting unit for the at least one axis.

摘要翻译： 磁共振成像诊断装置包括：生成单元，其生成切片梯度磁场，相位编码梯度磁场和读取梯度磁场，其在切片轴，相位编码轴和读出位置 设置单元，其设置相对于从切片轴选择的至少一个轴，对存在于对象的感兴趣区域的动脉和静脉中的流动而产生的信号电平降低进行加权的去相位量， 相位编码轴和读出轴;以及控制单元，其通过使用用于梯度回波系统的脉冲序列来控制生成单元，该梯度回波系统包括与由设定设定的去相位量对应的去相位梯度磁场脉冲 至少一个轴的单位。

公开(公告)号：US20090076374A1

公开(公告)日：2009-03-19

申请号：US12292527

申请日：2008-11-20

申请人： Tokunori Kimura ,  Masato Ikedo

发明人： Tokunori Kimura ,  Masato Ikedo

IPC分类号： A61B5/055

CPC分类号： A61B5/055 ,  A61B5/417 ,  A61B5/489 ,  G01R33/50 ,  G01R33/5601 ,  G01R33/5607 ,  G01R33/5608 ,  G01R33/5616 ,  G01R33/56316 ,  G01R33/5635

摘要： A magnetic resonance imaging apparatus includes an acquisition unit which acquires first data in which a tissue of interest has higher signal intensity than a background and second data in which the tissue of interest has lower signal intensity than the background, with regard to images of the same region of the same subject, and a generation unit which generates, on the basis of the first data and the second data, third data in which the contrast of the tissue of interest to the background is higher than those in the first and second data.

摘要翻译： 磁共振成像装置包括获取单元，其获取其中感兴趣组织具有比背景更高的信号强度的第一数据，其中感兴趣的组织具有比背景更低的信号强度的第二数据，关于该图像的图像 区域，以及生成单元，其基于第一数据和第二数据生成第三数据，其中感兴趣组织对背景的对比度高于第一和第二数据中的对比度。

公开(公告)号：US20070164744A1

公开(公告)日：2007-07-19

申请号：US11653430

申请日：2007-01-16

申请人： Shigehide Kuhara ,  Hirofumi Anno ,  Masato Ikedo

发明人： Shigehide Kuhara ,  Hirofumi Anno ,  Masato Ikedo

IPC分类号： G01V3/00

CPC分类号： G01R33/3875

摘要： A magnetic resonance imaging apparatus includes a collector which collects magnetic resonance signals emitted from a region of interest of a subject, and a correction magnetic field generator which generates a correction magnetic field to correct the nonuniformity of a static magnetic field on the basis of magnetic resonance signals which are contained in the magnetic resonance signals collected by the collector, are emitted from a specific region which forms a portion of the region of interest.

摘要翻译： 磁共振成像装置包括收集从受检者的感兴趣区域发射的磁共振信号的收集器和产生校正磁场的校正磁场发生器，以校正基于磁共振的静态磁场的不均匀性 包含在由收集器收集的磁共振信号中的信号从形成感兴趣区域的一部分的特定区域发射。