公开(公告)号：US4644279A

公开(公告)日：1987-02-17

申请号：US717523

申请日：1985-03-29

申请人： Kazuya Hoshino ,  Noriaki Yamada ,  Eiji Yoshitome ,  Tadashi Sugiyama ,  Hiroyuki Matsuura

发明人： Kazuya Hoshino ,  Noriaki Yamada ,  Eiji Yoshitome ,  Tadashi Sugiyama ,  Hiroyuki Matsuura

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/24 ,  G01R33/38 ,  G01R33/385 ,  G01R33/389 ,  G01R33/565 ,  G01R33/20

CPC分类号： G01R33/381 ,  G01R33/24 ,  G01R33/389 ,  G01R33/56563

摘要： After spins in a subject being examined have been selectively excited, the application of gradient magnetic fields is interrupted to produce an FID signal. The intensity of the primary magnetic field is determined based on the central frequency of the Fourier spectrum of the FID signal, i.e., the Larmor frequency. The primary magnetic field is controlled or the observed data is corrected, according to the measured value of the primary magnetic field intensity.

摘要翻译： 在被检查对象中的旋转已被选择性地激发之后，中断梯度磁场的施加以产生FID信号。 基于FID信号的傅立叶频谱的中心频率即拉莫尔频率来确定初级磁场的强度。 根据初级磁场强度的测量值，控制主磁场或观察数据的校正。

公开(公告)号：US06927576B2

公开(公告)日：2005-08-09

申请号：US10376760

申请日：2003-02-27

申请人： Kazuya Hoshino

发明人： Kazuya Hoshino

IPC分类号： G01R33/28 ,  A61B5/055 ,  G01R33/565 ,  G01V3/00

CPC分类号： G01R33/56563

摘要： For the purpose of acquiring magnetic resonance signals unaffected by any high magnetic field disturbance, magnetic resonance signals are sequentially acquired for a plurality of views; magnetic field disturbance is monitored; the magnetic resonance signal acquisition is repeated for a view at which magnetic field disturbance has occurred; and an image is produced based on magnetic resonance signals after the repetition has been applied.

摘要翻译： 为了获得不受任何高磁场干扰影响的磁共振信号，对于多个视图顺序获取磁共振信号; 监测磁场干扰; 对发生磁场干扰的视图重复磁共振信号采集; 并且在应用重复之后基于磁共振信号产生图像。

公开(公告)号：US06812699B2

公开(公告)日：2004-11-02

申请号：US10386274

申请日：2003-03-11

申请人： Kazuya Hoshino

发明人： Kazuya Hoshino

IPC分类号： G01V300

CPC分类号： G01R33/4833

摘要： For the purpose of RF pulse tuning so as to effectively utilize the capacity of an RF transmission apparatus, in tuning the RF pulse for excitation use so as to make the flip angle of spins identical with its target value, the pulse width of the RF pulse is consecutively increased from its predetermined initial value until the flip angle of spins become identical with its target value (902 through 912). Further, if the flip angle fails to reach its target value even though the amplitude of the RF pulse is raised to the adjustable maximum, the next increment of the pulse width is determined according to the extent of failure to attain the target.

摘要翻译： 为了RF脉冲调谐的目的，为了有效地利用RF发送装置的容量，在调谐RF脉冲进行激励使用以使自旋的翻转角与其目标值相同时，RF脉冲的脉冲宽度 从其预定的初始值连续增加，直到自旋的翻转角度与其目标值（902至912）相同。 此外，即使RF脉冲的振幅升高到可调最大值，即使翻转角度未达到目标值，脉冲宽度的下一个增量根据达到目标的失败程度来确定。

公开(公告)号：US4694251A

公开(公告)日：1987-09-15

申请号：US840570

申请日：1986-02-21

申请人： Eiji Yoshitome ,  Kazuya Hoshino

发明人： Eiji Yoshitome ,  Kazuya Hoshino

IPC分类号： G01R33/24 ,  A61B5/055 ,  A61B10/00 ,  G01R33/48 ,  G01R33/54 ,  G01R33/56 ,  G01R33/565 ,  G01R33/20

CPC分类号： G01R33/482 ,  G01R33/56 ,  G01R33/56563

摘要： A method and apparatus are disclosed for nuclear magnetic resonance imaging utilizing the Fourier transform imaging scan sequence, with measurement data being obtained from which the offects of variations in the static magnetic field are eliminated. The method and apparatus are characterized by measurement of view data G(k,t) for a body which is under diagnosis under the condition that there is a specific value of twist of spin phase within the body, in a specific direction, measurement of the view data G(-k,t) for the body which is under diagnosis under the condition that the value of twist of the spin phase within the body is equal in amount and of opposite direction to the aforementioned value of twist of spin phase, with the time which elapses between the measurements of G(k,t) and G(-k,t) being made sufficiently short that any change in the static magnetic field occurring therein can be ignored, deriving from the view data G(k,t) and G(-k,t) the data G(k,t.sub.0) and G(-k,-t.sub.0), for the respective time points t.sub.0 and -t.sub.0 which are mutually symmetrically disposed with respect to the time origin, deriving the complex conjugate G(-k,-t.sub.0) of the data G(-k,-t.sub.0), deriving the ratio A which is equal to G(k,t.sub.0)/G(-k,-t.sub.0), and correcting measured data by a signal which is proportional to the argument arg(A) of the ratio A.

摘要翻译： PCT No.PCT / JP85 / 00370 Sec。 371日期1986年2月21日 102（e）日期1986年2月21日PCT提交1985年7月2日PCT公布。 出版物WO86 / 00706 日本1986年1月30日。公开了利用傅里叶变换成像扫描序列进行核磁共振成像的方法和装置，其中获得了测量数据，从而消除了静态磁场的变化。 该方法和装置的特征在于，在身体内具有特定方向的自旋相位扭曲的特定值的条件下，对正在诊断的身体的视图数据G（k，t）进行测量， 在身体内的自旋相位的扭曲量相等于与上述旋转相位扭曲的方向相反的条件下，对正在诊断的身体的视图数据G（-k，t）与 在G（k，t）和G（-k，t）的测量之间经过的时间足够短，使得其中发生的静态磁场的任何变化可以被忽略，从视图数据G（k，t ）和G（-k，t）对于相对于时间原点相互对称布置的各个时间点t0和-t0的数据G（k，t0）和G（-k，-t0），导出 数据G（-k，-t0）的复共轭＆upbar＆G（ - ＆upbar＆k， - ＆upbar＆t0），导出等于G（k，t0）/ u pbar＆G（ - ＆upbar＆k， - ＆upbar＆t0），并且通过与比率A的参数arg（A）成比例的信号来校正测量数据。

公开(公告)号：US4656426A

公开(公告)日：1987-04-07

申请号：US806038

申请日：1985-12-06

申请人： Noriaki Yamada ,  Kazuya Hoshino ,  Tadashi Sugiyama ,  Hiroyuki Matsuura

发明人： Noriaki Yamada ,  Kazuya Hoshino ,  Tadashi Sugiyama ,  Hiroyuki Matsuura

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/48 ,  G01R33/54 ,  G01R33/565 ,  G01R33/20

CPC分类号： G01R33/482 ,  G01R33/565

摘要： An NMR data processing method for use with an NMR tomograph, wherein signals, located in a period before and after an NMR signal to be sampled and containing substantially none of the NMR signal component, are measured as offset data for each view, so that even the offset slightly fluctuating in the view can be corrected for the NMR signal, on the basis of that data.

摘要翻译： 用于NMR层析成像的NMR数据处理方法，其中测量位于待采样的NMR信号之前和之后的周期内并且基本上不含NMR信号分量的信号作为每个视图的偏移数据被测量，使得均匀 基于该数据，可以对NMR信号校正视野中略微波动的偏移。

公开(公告)号：US07853768B2

公开(公告)日：2010-12-14

申请号：US11979357

申请日：2007-11-01

申请人： Kazuya Hoshino ,  Masato Yuzawa

发明人： Kazuya Hoshino ,  Masato Yuzawa

IPC分类号： G06F12/00

CPC分类号： G11C16/10 ,  G05B2219/24007 ,  G05B2219/2637

摘要： When a power switch is turned OFF, the execution of steady process is stopped, and backup data is written into a flash memory. If the power switch is turned ON during the writing of the backup data, the backup data writing execution is allowed to last for a predetermined time T1 after an instant when the power switch is turned ON, and if the writing of the backup data is not terminated at the time when the predetermined time T1 has elapsed, the writing of the backup data is interrupted so that the steady process is started for being executed.

摘要翻译： 当电源开关关闭时，停止执行稳定过程，并将备份数据写入闪存。 在备份数据的写入期间，如果电源开关被接通，则在电源开关接通之后的瞬间，允许备份数据写入执行持续预定时间T1，并且备份数据的写入不是 在经过了预定时间T1的时刻终止，备份数据的写入被中断，从而开始执行稳定处理。

公开(公告)号：US5424646A

公开(公告)日：1995-06-13

申请号：US211596

申请日：1994-04-04

申请人： Kazuya Hoshino

发明人： Kazuya Hoshino

IPC分类号： A61B5/055 ,  G01R33/36 ,  G01V3/00

CPC分类号： G01R33/3614

摘要： This invention provides an RF drive circuit of MR apparatus capable of controlling the drive voltage of the RF coil, inclusive of the correction of the quadrature balance. The RF drive circuit for quadratically driving the RF coil of MR apparatus comprises a voltage monitor means for monitoring the voltages on the 0.degree.-port and 90.degree.-port of the RF coil, a feedback voltage generation means for producing, from the monitored voltages on the 0.degree.-port and 90.degree.-port, a feedback voltage that corresponds to a component of a revolving magnetic field formed in the RF coil, with the magnetic field component being in the field revolving direction and coupling with a spin system, and a drive voltage control means for controlling, based on the feedback voltage, the drive voltage to be applied to the RF coil.

摘要翻译： PCT No.PCT / JP92 / 01333 Sec。 371日期1994年04月4日 102（e）日期1994年4月4日PCT提交1992年10月13日PCT公布。 公开号WO93 / 07805 日期：1993年04月19日。本发明提供了能够控制RF线圈的驱动电压的MR装置的RF驱动电路，包括正交平衡的校正。 用于二次驱动MR装置的RF线圈的RF驱动电路包括用于监视RF线圈的0°和90°端口处的电压的电压监视装置，用于从监测电压产生的反馈电压产生装置 在0°端口和90°端口上，对应于在RF线圈中形成的旋转磁场的分量的反馈电压，其中磁场分量处于场旋转方向并与自旋系统耦合，以及 驱动电压控制装置，用于基于所述反馈电压来控制要施加到所述RF线圈的驱动电压。

公开(公告)号：US4786872A

公开(公告)日：1988-11-22

申请号：US65359

申请日：1987-06-23

申请人： Kazuya Hoshino

发明人： Kazuya Hoshino

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/48 ,  G01R33/54 ,  G01R33/561 ,  G01R33/20

CPC分类号： G01R33/482 ,  G01R33/561

摘要： An NMR imaging method and apparatus according to the present invention which enables a reduction in the scanning time without lowering the contrast resolving power and the spatial resolving power is arranged such that data which belongs to a relatively low spatial frequency region is collected by an ordinary scanning method, while data which belongs to a relatively high spatial frequency region is collected by a scanning method which enables data to be collected at a relatively high frequency, and reconstruction of an image is effected on the basis of data synthesized from data collected by these two methods.

公开(公告)号：US4684889A

公开(公告)日：1987-08-04

申请号：US719750

申请日：1985-04-04

申请人： Keiki Yamaguchi ,  Kazuya Hoshino ,  Hideto Iwaoka

发明人： Keiki Yamaguchi ,  Kazuya Hoshino ,  Hideto Iwaoka

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/385 ,  G01R33/565 ,  G01N24/08

CPC分类号： G01R33/56563

摘要： An object which can provide a reference for measuring the intensity of a primary magnetic field, is positioned in the vicinity of a subject being examined. A variation in the primary magnetic field intensity is detected, based on a frequency shift of data observed of the object, and is used to control the primary magnetic field intensity, or reference frequency for phase detection, or to correct image data. In this manner image quality is prevented from being degraded due to the variation of the primary magnetic field intensity.

摘要翻译： 可以提供用于测量初级磁场的强度的参考的对象位于被检查对象的附近。 基于对象观察到的数据的频移来检测初级磁场强度的变化，并且用于控制初级磁场强度或用于相位检测的参考频率或校正图像数据。 以这种方式，由于初级磁场强度的变化，防止图像质量劣化。