公开(公告)号：US20110101980A1

公开(公告)日：2011-05-05

申请号：US12914027

申请日：2010-10-28

申请人： Yoshiharu Ohiwa ,  Kazuya Okamoto ,  Masaaki Umeda

发明人： Yoshiharu Ohiwa ,  Kazuya Okamoto ,  Masaaki Umeda

IPC分类号： G01R33/48

CPC分类号： G01R33/54 ,  G01R33/4833 ,  G01R33/543

摘要： According to one embodiment, a magnetic resonance imaging apparatus includes; an imaging area setting unit configured to set an imaging area for a patient according to an imaging condition; an excitation angle determination unit configured to collect magnetic resonance signals from the imaging area by a pre-scan and to determine, on the basis of the collected magnetic resonance signal, an optimal excitation angle of a radio-frequency magnetic field for use in an imaging scan; and an imaging unit configured to acquire imaging data by carrying out the imaging scan of the set imaging area for the patient applying the radio-frequency magnetic field with the determined optimal excitation angle.

摘要翻译： 根据一个实施例，一种磁共振成像装置包括： 成像区域设定单元，被配置为根据成像条件设置患者的成像区域; 励磁角确定单元，被配置为通过预扫描从成像区域收集磁共振信号，并且基于所收集的磁共振信号确定用于成像的射频磁场的最佳激发角度 扫描 以及成像单元，被配置为通过对所述设置的成像区域进行成像扫描来获取成像数据，所述成像区域对于施加具有所确定的最佳激发角的所述射频磁场的患者进行。

公开(公告)号：US09157977B2

公开(公告)日：2015-10-13

申请号：US12914027

申请日：2010-10-28

申请人： Yoshiharu Ohiwa ,  Kazuya Okamoto ,  Masaaki Umeda

发明人： Yoshiharu Ohiwa ,  Kazuya Okamoto ,  Masaaki Umeda

IPC分类号： G01R33/54 ,  G01R33/483

CPC分类号： G01R33/54 ,  G01R33/4833 ,  G01R33/543

摘要： According to one embodiment, a magnetic resonance imaging apparatus includes; an imaging area setting unit configured to set an imaging area for a patient according to an imaging condition; an excitation angle determination unit configured to collect magnetic resonance signals from the imaging area by a pre-scan and to determine, on the basis of the collected magnetic resonance signal, an optimal excitation angle of a radio-frequency magnetic field for use in an imaging scan; and an imaging unit configured to acquire imaging data by carrying out the imaging scan of the set imaging area for the patient applying the radio-frequency magnetic field with the determined optimal excitation angle.

摘要翻译： 根据一个实施例，一种磁共振成像装置包括： 成像区域设定单元，被配置为根据成像条件设置患者的成像区域; 励磁角确定单元，被配置为通过预扫描从成像区域收集磁共振信号，并且基于所收集的磁共振信号确定用于成像的射频磁场的最佳激发角度 扫描 以及成像单元，被配置为通过对所述设置的成像区域进行成像扫描来获取成像数据，所述成像区域对于施加具有所确定的最佳激发角的所述射频磁场的患者进行。

公开(公告)号：US06194899B1

公开(公告)日：2001-02-27

申请号：US09251488

申请日：1999-02-17

申请人： Yasutoshi Ishihara ,  Masaaki Umeda ,  Hidehiro Watanabe ,  Kazuya Okamoto

发明人： Yasutoshi Ishihara ,  Masaaki Umeda ,  Hidehiro Watanabe ,  Kazuya Okamoto

IPC分类号： G01V300

CPC分类号： G01R33/4804

摘要： An absolute temperature measuring pulse sequence is executed and, subsequently, a relative temperature measuring pulse sequence is repeatedly executed. Since while a relative temperature can be measured from phase information, an absolute temperature requires frequency information, a time required in the relative temperature measuring pulse can be made shorter than that required in the absolute temperature measuring pulse sequence. Since the relative temperature reveals a temperature variation, if an absolute temperature at a given time is known, an absolute temperature at a subsequent time can be calculated from the relative temperature. Thus, a local internal temperature of the subject can be measured, with a shorter temporal resolution, with the use of the absolute temperature and relative temperature.

摘要翻译： 执行绝对温度测量脉冲序列，随后重复执行相对温度测量脉冲序列。 由于可以从相位信息测量相对温度，所以绝对温度需要频率信息，相对温度测量脉冲所需的时间可以比绝对温度测量脉冲序列要短。 由于相对温度显示温度变化，如果在给定时间内的绝对温度是已知的，则可以从相对温度计算随后时间的绝对温度。 因此，可以使用绝对温度和相对温度，以较短的时间分辨率来测量受试者的局部内部温度。

公开(公告)号：US07847548B2

公开(公告)日：2010-12-07

申请号：US12041289

申请日：2008-03-03

申请人： Kiyomi Ooshima ,  Isao Tatebayashi ,  Masaaki Umeda

发明人： Kiyomi Ooshima ,  Isao Tatebayashi ,  Masaaki Umeda

IPC分类号： G01V3/00

CPC分类号： G01R33/485 ,  G01R33/543 ,  G01R33/546 ,  G01R33/5608

摘要： A magnetic resonance diagnosing apparatus includes an imaging unit which images each slice image of a subject in relation to a plurality of different imaging slices, a measurement unit which measures a magnetic resonance spectrum of the subject in relation to a measurement slice, a selection unit which selects slice images corresponding to one or more imaging slices which at least partially overlap the measurement slice from the plurality of slice images, and a creation unit which creates a display image which simultaneously shows the selected one or more slice images and the spectral image.

摘要翻译： 一种磁共振诊断装置，包括对与多个不同的成像片相对的被检体的切片图像进行成像的摄像部，测定被检体相对于测定切片的磁共振谱的测定部， 选择对应于与所述多个切片图像至少部分地与所述测量切片重叠的一个或多个成像切片的切片图像，以及创建单元，其创建同时显示所选择的一个或多个切片图像和所述光谱图像的显示图像。

公开(公告)号：US08093895B2

公开(公告)日：2012-01-10

申请号：US12427337

申请日：2009-04-21

申请人： Masaaki Umeda

发明人： Masaaki Umeda

IPC分类号： G01V3/00

CPC分类号： G01R33/5617 ,  G01R33/4828 ,  G01R33/4833 ,  G01R33/5605 ,  G01R33/5607 ,  G01R33/56341 ,  G01R33/56366

摘要： A magnetic resonance imaging apparatus includes a data acquisition unit and an image data generating unit. The data acquisition unit acquires MR signals for imaging by an imaging scan with a frequency-selective or slice-selective radio frequency intermediate pulse for controlling a contrast and a spoiler gradient magnetic field for suppressing unnecessary signal component after applying al least one of radio frequency excitation pulses. The image data generating unit generates image data based on the magnetic resonance signals.

摘要翻译： 磁共振成像设备包括数据获取单元和图像数据生成单元。 数据采集​​单元通过用于控制对比度的频率选择性或切片选择性射频中间脉冲的成像扫描来获取用于成像的MR信号，以及用于在应用至少一个射频激励之后抑制不必要的信号分量的扰流板梯度磁场 脉冲。 图像数据生成单元基于磁共振信号生成图像数据。

公开(公告)号：US09041394B2

公开(公告)日：2015-05-26

申请号：US13149080

申请日：2011-05-31

申请人： Masaaki Umeda

发明人： Masaaki Umeda

IPC分类号： G01R33/565 ,  G01R33/561

CPC分类号： G01R33/5617 ,  G01R33/56554

摘要： A magnetic resonance imaging apparatus according to an embodiment includes an executing unit, a calculating unit, and a correcting unit. The executing unit executes a first pre-scan in which a readout gradient magnetic field and a phase encoding gradient magnetic field are not applied and sampling gradient magnetic fields is applied in a phase encoding direction and a second pre-scan in which the readout gradient magnetic field is not applied, the sampling gradient magnetic field is applied at the same echo signal as that in the first pre-scan, and a representative phase encoding gradient magnetic field in a main scan. The calculating unit calculates the amount of correction from phase differences between the echo signals collected by the first pre-scan and between the echo signals collected by the second pre-scan. The correcting unit corrects the pulse sequence for the main scan on the basis of the calculated amount of correction.

摘要翻译： 根据实施例的磁共振成像装置包括执行单元，计算单元和校正单元。 执行单元执行其中不施加读出梯度磁场和相位编码梯度磁场的第一预扫描，并且在相位编码方向和第二预扫描中施加采样梯度磁场，其中读出梯度磁 采样梯度磁场以与第一预扫描相同的回波信号施加，主扫描中代表相位编码梯度磁场。 计算单元从由第一预扫描收集的回波信号与由第二预扫描收集的回波信号之间的相位差计算校正量。 校正单元根据计算出的校正量校正主扫描的脉冲序列。

公开(公告)号：US08791698B2

公开(公告)日：2014-07-29

申请号：US13223772

申请日：2011-09-01

申请人： Masaaki Umeda

发明人： Masaaki Umeda

IPC分类号： G01V3/00

CPC分类号： G01R33/485 ,  G01R33/3415 ,  G01R33/5611 ,  G01R33/5616

摘要： A magnetic resonance imaging apparatus includes a spectrum acquisition unit and a determining unit. The spectrum acquisition unit acquires a frequency spectrum of magnetic resonance signals from a metabolic product in a target region in an object. The determining unit determines the number of (a) integrations and/or (b) phase encodes of magnetic resonance signals for obtaining the frequency spectrum depending on a factor influencing the frequency spectrum.

摘要翻译： 磁共振成像装置包括频谱获取单元和确定单元。 频谱获取单元从对象中的目标区域中的代谢产物获取磁共振信号的频谱。 确定单元确定用于根据影响频谱的因素获得频谱的（a）积分和/或（b）相位编码的数量。

公开(公告)号：US08624595B2

公开(公告)日：2014-01-07

申请号：US13116458

申请日：2011-05-26

申请人： Masaaki Umeda

发明人： Masaaki Umeda

IPC分类号： G01V3/00

CPC分类号： G01R33/56554 ,  G01R33/5617

摘要： A magnetic resonance imaging apparatus according to an embodiment includes an executing unit, a calculating unit, and a correcting unit. The executing unit executes a pre-scan while using a pulse sequence by which a plurality of echo signals are collected. The calculating unit calculates a phase difference between at least two echo signals of which a fluctuation of phase differences is stable and that are selected out of the plurality of echo signals collected during the pre-scan and are selected while excluding echo signals collected during an initial time period. The correcting unit that corrects a pulse sequence used for a main scan, based on the phase difference calculated by the calculating unit.

摘要翻译： 根据实施例的磁共振成像装置包括执行单元，计算单元和校正单元。 执行单元在使用收集多个回波信号的脉冲序列的同时执行预扫描。 计算单元计算在预扫描期间收集的多个回波信号中的相位差波动是稳定的并且被选出的至少两个回波信号之间的相位差，并且被选择，同时排除在初始期间收集的回波信号 时间段。 校正单元，其基于由计算单元计算出的相位差校正用于主扫描的脉冲序列。

公开(公告)号：US08253415B2

公开(公告)日：2012-08-28

申请号：US12400223

申请日：2009-03-09

申请人： Masaaki Umeda

发明人： Masaaki Umeda

IPC分类号： G01V3/00

CPC分类号： G01R33/485 ,  G01R33/3415 ,  G01R33/5611 ,  G01R33/5616

摘要： A magnetic resonance imaging apparatus includes a spectrum acquisition unit and a determining unit. The spectrum acquisition unit acquires a frequency spectrum of magnetic resonance signals from a metabolic product in a target region in an object. The determining unit determines one of the numbers of integrations and phase encodes of magnetic resonance signals for obtaining the frequency spectrum depending on a factor influencing the frequency spectrum.

摘要翻译： 磁共振成像装置包括频谱获取单元和确定单元。 频谱获取单元从对象中的目标区域中的代谢产物获取磁共振信号的频谱。 确定单元确定用于根据影响频谱的因素获得频谱的磁共振信号的积分和相位编码之一。

公开(公告)号：US20110037466A1

公开(公告)日：2011-02-17

申请号：US12926023

申请日：2010-10-21

申请人： Shinya Yamada ,  Hitoshi Kanazawa ,  Tokunori Kimura ,  Masaaki Umeda

发明人： Shinya Yamada ,  Hitoshi Kanazawa ,  Tokunori Kimura ,  Masaaki Umeda

IPC分类号： G01R33/44

CPC分类号： G01R33/56308 ,  A61B5/0263 ,  A61B5/7285 ,  G01R33/5602 ,  G01R33/5614 ,  G01R33/5615 ,  G01R33/5616 ,  G01R33/5617 ,  G01R33/56316 ,  G01R33/56333 ,  G01R33/56509 ,  G01R33/5673 ,  G01R33/5676

摘要： A magnetic resonance imaging apparatus includes an imaging unit which applies a labeling pulse to invert a spin included in a labeling region within part of a imaging region and then collects a echo signal from a time point when an inversion time has passed from the application of the labeling pulse, and a control unit, the control unit controlling the imaging unit so that the echo signal in the imaging region is collected a plurality of times with variations in the inversion time, the control unit also controlling the imaging unit so that a time ranging from a reference time point within a biological signal obtained from a subject to the application of the labeling pulse is a time determined in accordance with the inversion time.