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1. 发明授权

US08111070B2 Magnetic resonance imaging apparatus and magnetic resonance imaging method 有权
标题翻译：磁共振成像装置和磁共振成像方法
公开(公告)号：US08111070B2
公开(公告)日：2012-02-07
申请号：US12492700
申请日：2009-06-26
申请人： Kohei Adachi , Masatoshi Hanawa , Kazuya Okamoto
发明人： Kohei Adachi , Masatoshi Hanawa , Kazuya Okamoto
IPC分类号： G01V3/00
CPC分类号： G01R33/583 , G01R33/5659
摘要： A magnetic resonance imaging apparatus includes an imaging condition acquisition unit and an imaging unit. The imaging condition acquisition unit acquires at least one of optimum amplitude and optimum phase of a radio frequency transmission signal so as to reduce a deviation of data in at least one region of interest set in an object. The imaging unit acquires image data by imaging according to an imaging condition including at least one of optimum amplitude and optimum phase.
摘要翻译：磁共振成像装置包括成像条件获取单元和成像单元。成像条件获取单元获取射频发送信号的最佳幅度和最佳相位中的至少一个，以便减少在对象中设置的至少一个感兴趣区域中的数据的偏差。成像单元根据包括最佳幅度和最佳相位中的至少一个的成像条件进行成像来获取图像数据。

2. 发明授权

US07741847B2 Magnetic resonance apparatus with temperature controlled magnet shim pieces 有权
标题翻译：具有温度控制磁体垫片的磁共振装置
公开(公告)号：US07741847B2
公开(公告)日：2010-06-22
申请号：US11907198
申请日：2007-10-10
申请人： Kazuto Nakabayashi , Masatoshi Hanawa
发明人： Kazuto Nakabayashi , Masatoshi Hanawa
IPC分类号： G01V3/00
CPC分类号： G01R33/3873 , G01R33/3804
摘要： A magnetic resonance apparatus in which magnetic metal pieces are accommodated in an accommodation section so as to correct uniformity in a main magnetic field, includes an acquisition unit which acquires temperature information related to at least one of a temperature of the magnetic metal pieces accommodated in the accommodation section, a temperature of the accommodation section, and a temperature of a position in the vicinity of the accommodation section, and a temperature adjustment unit which adjusts the temperature of the magnetic metal pieces to a target temperature by preheating the magnetic metal pieces on the basis of the temperature information acquired by the acquisition unit.
摘要翻译：磁性金属片被容纳在收纳部中以校正主磁场的均匀性的磁共振装置包括获取单元，该获取单元获取与容纳在该磁场中的磁性金属片的温度中的至少一个相关的温度信息收容部的温度，收容部的温度以及收纳部附近的位置的温度，以及温度调节部，其通过将磁性金属片预热到目标温度而将磁性金属片的温度调整为目标温度由采集单元获取的温度信息的基础。

3. 发明授权

US07511502B2 Magnetic resonance imaging apparatus 有权
标题翻译：磁共振成像装置
公开(公告)号：US07511502B2
公开(公告)日：2009-03-31
申请号：US11958925
申请日：2007-12-18
申请人： Yoshitomo Sakakura , Masatoshi Hanawa
发明人： Yoshitomo Sakakura , Masatoshi Hanawa
IPC分类号： G01V3/00
CPC分类号： G01R33/385 , G01R33/3856 , G01R33/3873
摘要： A magnetic resonance imaging apparatus includes a static magnetic field magnet which generates a static magnetic field, a gradient coil unit which generates a gradient magnetic field for overlapping with the static magnetic field, a shim unit which is disposed between the static magnetic field magnet and the gradient coil unit to control the static magnetic field, and a heat shielding member which is disposed between the gradient coil unit and the shim unit to shield a radiant heat of the gradient coil unit.
摘要翻译：磁共振成像装置包括产生静磁场的静磁场磁体，产生用于与静磁场重叠的梯度磁场的梯度线圈单元，设置在静磁场磁体和静磁场之间的垫片单元用于控制静磁场的梯度线圈单元，以及设置在梯度线圈单元和垫片单元之间以屏蔽梯度线圈单元的辐射热的隔热构件。

4. 发明授权

US5343149A Magnetic resonance imaging system 失效
标题翻译：磁共振成像系统
公开(公告)号：US5343149A
公开(公告)日：1994-08-30
申请号：US94916
申请日：1993-07-22
申请人： Masatoshi Hanawa
发明人： Masatoshi Hanawa
IPC分类号： A61B5/055 , G01R33/36 , G01R33/46 , G01R33/58 , G01V3/00
CPC分类号： G01R33/583
摘要： In a magnetic resonance imaging system having an automatic power control function for adjusting the transmission power of an RF pulse so as to set a desired flip angle of a spin, in an automatic power control mode, a plane including only a portion of an object to be examined in an imaging region having a uniform field intensity, e.g., a transaxial plane or a plane slightly inclined from the transaxial plane is excited by a gradient magnetic field Gz in the direction of the body axis of the object as a slice gradient magnetic field regardless of a plane to be imaged. The peak values of MR echo signals are detected while the transmission power of the RF pulse is changed. An RF pulse transmission power at which the maximum peak value appears is detected from these detection values. The transmission power of the RF pulse in imaging, i.e., the output of an RF oscillator having a predetermined frequency, is attenuated on the basis of the relationship between the transmission power and the maximum peak value, thereby adjusting the attenuation amount of an attenuator for supplying a current to an RF coil.
摘要翻译：在具有自动功率控制功能的磁共振成像系统中，在自动功率控制模式中，用于调整RF脉冲的发射功率以便设定期望的旋转翻转角度，将仅包括对象的一部分的平面在具有均匀场强的成像区域中进行检查，例如横轴平面或从轴向平面稍微倾斜的平面被作为切片梯度磁场的物体的轴线方向上的梯度磁场Gz激发不管要成像的飞机。当RF脉冲的发送功率改变时，检测MR回波信号的峰值。从这些检测值检测出出最大峰值的RF脉冲发送功率。基于发送功率和最大峰值之间的关系，成像中的RF脉冲的发送功率，即具有预定频率的RF振荡器的输出被衰减，从而调整衰减器的衰减量向RF线圈提供电流。

5. 发明授权

US4767993A Coil system for magnetic resonance imaging 失效
标题翻译：用于磁共振成像的线圈系统
公开(公告)号：US4767993A
公开(公告)日：1988-08-30
申请号：US75758
申请日：1987-07-20
申请人： Masatoshi Hanawa
发明人： Masatoshi Hanawa
IPC分类号： A61B5/055 , G01R33/341 , G01R33/36 , G01R33/56 , G01R33/20
CPC分类号： G01R33/3678 , G01R33/56
摘要： A coil system for magnetic resonance imaging in a magnetic resonance imaging system, used to transmit the excitation pulse and to receive the magnetic resonance signals, includes a first coil for transmitting a predetermined high-frequency pulse, second and third coils, arranged on a propagation path of the magnetic resonance signal at a position closer to the object to be examined than the first coil in directions orthogonal to each other, for receiving the magnetic resonance signals, and a pair of tuning elements, respectively provided in association with the second and third coils, for tuning the second and third coils to predetermined magnetic resonance signals. The tuning elements tune the second and third coils slightly offset from accurate tuning points so that voltage phases of the magnetic resonance signals received through the second and third coils coincide with each other.
摘要翻译：用于磁共振成像系统中用于发射激励脉冲并接收磁共振信号的磁共振成像用线圈系统包括用于传输预定的高频脉冲，第二和第三线圈的第一线圈，布置在传播在与第一线圈相对的方向上相对于被检查物体的位置处的磁共振信号的路径相对于彼此正交的方向，用于接收磁共振信号;以及一对调谐元件，分别与第二和第三线圈，用于将第二和第三线圈调谐到预定的磁共振信号。调谐元件调谐第二和第三线圈稍微偏离精确的调谐点，使得通过第二和第三线圈接收的磁共振信号的电压相位彼此一致。

6. 发明授权

US4665364A Magnetic resonance imaging system 失效
标题翻译：磁共振成像系统
公开(公告)号：US4665364A
公开(公告)日：1987-05-12
申请号：US699960
申请日：1985-02-08
申请人： Masatoshi Hanawa
发明人： Masatoshi Hanawa
IPC分类号： G01R33/20 , A61B5/055 , A61B10/00 , G01R33/36 , G01R33/48 , G01R33/58
CPC分类号： G01R33/3621 , G01R33/58
摘要： In a magnetic resonance imaging system, a reference sample made of material including predetermined atomic nuclei to be tomographed is disposed on the side of an object under inspection in a tomographing field (an area to be tomographed) of an MR image. In collecting projection data by detecting the MR signal, the magnitude of the projection data on the reference sample is detected. A substantial gain of an MR signal amplifying section is adjusted according to the detected magnitude.
摘要翻译：在磁共振成像系统中，在MR图像的断层摄影场（要断层的区域）中，在被检查对象的一侧设置由包含预定的待断层原子核的材料构成的参照样品。在通过检测MR信号收集投影数据时，检测参考样本上的投影数据的大小。根据检测到的幅度来调整MR信号放大部分的实质增益。

7. 发明申请

US20110298459A1 MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD 有权
标题翻译：磁共振成像装置和磁共振成像方法
公开(公告)号：US20110298459A1
公开(公告)日：2011-12-08
申请号：US13214348
申请日：2011-08-22
申请人： Kohei ADACHI , Masatoshi HANAWA , Kazuya OKAMOTO
发明人： Kohei ADACHI , Masatoshi HANAWA , Kazuya OKAMOTO
IPC分类号： G01R33/44
CPC分类号： G01R33/583 , G01R33/5659
摘要： A magnetic resonance imaging apparatus includes an imaging condition acquisition unit and an imaging unit. The imaging condition acquisition unit acquires at least one of optimum amplitude and optimum phase of a radio frequency transmission signal so as to reduce a deviation of data in at least one region of interest set in an object. The imaging unit acquires image data by imaging according to an imaging condition including at least one of optimum amplitude and optimum phase.
摘要翻译：磁共振成像装置包括成像条件获取单元和成像单元。成像条件获取单元获取射频发送信号的最佳幅度和最佳相位中的至少一个，以便减少在对象中设置的至少一个感兴趣区域中的数据的偏差。成像单元根据包括最佳幅度和最佳相位中的至少一个的成像条件进行成像来获取图像数据。

8. 发明申请

US20080164876A1 MAGNETIC RESONANCE IMAGING APPARATUS 有权
标题翻译：磁共振成像装置
公开(公告)号：US20080164876A1
公开(公告)日：2008-07-10
申请号：US11958925
申请日：2007-12-18
申请人： Yoshitomo Sakakura , Masatoshi Hanawa
发明人： Yoshitomo Sakakura , Masatoshi Hanawa
IPC分类号： G01R33/28
CPC分类号： G01R33/385 , G01R33/3856 , G01R33/3873
摘要： A magnetic resonance imaging apparatus includes a static magnetic field magnet which generates a static magnetic field, a gradient coil unit which generates a gradient magnetic field for overlapping with the static magnetic field, a shim unit which is disposed between the static magnetic field magnet and the gradient coil unit to control the static magnetic field, and a heat shielding member which is disposed between the gradient coil unit and the shim unit to shield a radiant heat of the gradient coil unit.
摘要翻译：磁共振成像装置包括产生静磁场的静磁场磁体，产生用于与静磁场重叠的梯度磁场的梯度线圈单元，设置在静磁场磁体和静磁场之间的垫片单元用于控制静磁场的梯度线圈单元，以及设置在梯度线圈单元和垫片单元之间以屏蔽梯度线圈单元的辐射热的隔热构件。

9. 发明授权

US6023634A MR imaging using mutual interaction between different kinds of pools of nuclear spins 失效
标题翻译： MR成像使用不同种类的核旋转池之间的相互作用
公开(公告)号：US6023634A
公开(公告)日：2000-02-08
申请号：US618859
申请日：1996-03-20
申请人： Masatoshi Hanawa , Mitsue Miyazaki , Yoshimori Kassai
发明人： Masatoshi Hanawa , Mitsue Miyazaki , Yoshimori Kassai
IPC分类号： G01R33/54 , A61B5/055
CPC分类号： G01R33/54
摘要： In addition to the known MT (magnetization transfer) effect, an RMT (reverse MT) is newly found, which increases a detected MR signal strength. Both the MT and RMT effects can be explained with mutual interaction, such as phenomena of chemical exchange and/or cross relaxation, acted between a pool of water proton spins and another pool of macromolecule proton spins, for example, within an object. In order to enhance the MT or RMT effect, the frequency bandwidths of RF pulses, such as a 90.degree. RF exciting pulse in a SE or FSE method, an inversion pulse in a FLAIR or fast FLAIR method, and others, are controlled. To enhance the MT effect, the bandwidth is controlled into a wider value (approx. more than 1250 Hz) than the normally (conventionally) used bandwidth, while to obtain the RMT effect, the bandwidth is controlled into a narrower value (approx. less than 1000 Hz) than the normally used bandwidth. Actively controlling the MT or RMT effect permits changed image contrast in MR imaging.
摘要翻译：除了已知的MT（磁化传递）效应之外，新发现RMT（反向MT），这增加了检测到的MR信号强度。 MT和RMT效应都可以通过相互作用（例如化学交换和/或交叉松弛的现象）来解释，这些现象在水质子旋转池和另一个大分子质子自旋池之间起作用，例如在物体内。为了提高MT或RMT效应，可以控制RF脉冲的频率带宽，例如SE或FSE方法中的90°RF激励脉冲，FLAIR或快速FLAIR方法中的反转脉冲等。为了提高MT效应，带宽被控制在比正常（常规）使用的带宽更宽的值（大于1250Hz）的同时，为了获得RMT效应，带宽被控制在较小的值（大约少于超过1000 Hz）比正常使用的带宽。积极控制MT或RMT效果可以改善MR成像中的图像对比度。

10. 发明授权

US5051699A Magnetic resonance imaging system 失效
标题翻译：磁共振成像系统
公开(公告)号：US5051699A
公开(公告)日：1991-09-24
申请号：US400059
申请日：1989-08-29
申请人： Masatoshi Hanawa , Kazuto Nakabayashi
发明人： Masatoshi Hanawa , Kazuto Nakabayashi
IPC分类号： G01R33/485 , G01R33/565
CPC分类号： G01R33/56527 , G01R33/485
摘要： A magnetic resonance imaging system includes a static magnetic field generating section, a gradient magnetic field applying section, an RF pulse applying section, a sequence control section, a receiving section, and an imaging processing section. The sequence control section causes an RF pulse to excite magnetic resonance, causes at least one of the RF pulse and the gradient field to produce an initial magnetic resonance echo, applies a read gradient field to the imaging volume upon reception of the magnetic resonance echo, and inverts the read gradient field at least once to produce at least one magnetic resonance echo in addition to the initial magnetic resonance echo. The receiving section adds and averages data of a plurality of such magnetic resonance echoes or performs an addition or subtraction of the magnetic resonance echoes.
摘要翻译：磁共振成像系统包括静磁场产生部分，梯度磁场施加部分，RF脉冲施加部分，序列控制部分，接收部分和成像处理部分。序列控制部分使RF脉冲激发磁共振，使RF脉冲和梯度场中的至少一个产生初始磁共振回波，在接收到磁共振回波时将读取的梯度场应用于成像体积，并且将读取的梯度场反转至少一次以产生除了初始磁共振回波之外的至少一个磁共振回波。接收部分添加并平均多个这样的磁共振回波的数据，或执行磁共振回波的加法或减法。

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