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1. 发明专利

JP2008253546A Mri apparatus 有权
标题翻译： MRI装置
公开(公告)号：JP2008253546A
公开(公告)日：2008-10-23
申请号：JP2007099243
申请日：2007-04-05
申请人： Toshiba Corp , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社 , 株式会社東芝
发明人： ADACHI KOHEI
IPC分类号： A61B5/055 , G01R33/48 , G01R33/54
CPC分类号： G01R33/56572
摘要： PROBLEM TO BE SOLVED: To perform the correction of an MR signal frequency and a filtering process in a short time.
SOLUTION: This MRI apparatus sets a resampling time t4 to MR signals collected at sampling times of T5 interval, corresponding to their signal bands and further corrects the resampling time based on magnetic field characteristics of a gradient magnetic field. Then, this apparatus interpolates a standard filter coefficient preset at T5 interval, calculates a filter coefficient having its center at a resampling time tx4 after the correction relative to each of the sampling times, and calculates an amplitude value b4 of the MR signal at the resampling time tx4 by a convolution integral of the filter coefficient and the amplitude value of the MR signal. The amplitude value a4 of the MR signal at the resampling time t4 is substituted for the amplitude value b4, so as to simultaneously perform the correction of the MR signal frequency which changes according to the time change of the gradient magnetic field and the filtering process for removing unnecessary components superimposed on the MR signal.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：在短时间内执行MR信号频率的校正和滤波处理。解决方案：该MRI装置将采样时间t4设置为与其信号频带相对应的在T5间隔的采样时间收集的MR信号，并且基于梯度磁场的磁场特性进一步校正重采样时间。然后，该装置插入以T5间隔预先设定的标准滤波器系数，在相对于每个采样次数的校正后，以重新采样时间tx4计算其中心的滤波器系数，并且在重采样时计算MR信号的振幅值b4 时间tx4由滤波器系数和MR信号的振幅值的卷积积分。在采样时刻t4的MR信号的振幅值a4代入振幅值b4，以便同时进行根据梯度磁场的时间变化而变化的MR信号频率的校正，去除叠加在MR信号上的不必要的部件。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JP2007203036A Magnetic resonance imaging device, coil system of magnetic resonance imaging device, and method for processing received signal in magnetic resonance imaging device 有权
标题翻译：磁共振成像装置，磁共振成像装置的线圈系统以及用于在磁共振成像装置中处理接收信号的方法
公开(公告)号：JP2007203036A
公开(公告)日：2007-08-16
申请号：JP2006325973
申请日：2006-12-01
申请人： Toshiba Corp , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社 , 株式会社東芝
发明人： ADACHI KOHEI
IPC分类号： A61B5/055 , G01R33/34
CPC分类号： G01R33/3692 , G01R33/34 , G01R33/341
摘要： PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging device capable of improving reduction of signal-noise ratio due to signal damping accompanying with propagation in a space of a received signal transmitted by radio communications.
SOLUTION: This magnetic resonance imaging device 1 has a receiving coil 5 for receiving a nuclear magnetic resonance signal from a sample P to be inspected as a received signal, at least one receiving signal transmission antenna 11 for transmitting the received signal from the receiving coil 5 by radio communications, a plurality of receiving signal receiving antennas 14 for receiving received signals transmitted from the receiving signal transmission antenna 11, a signal selection means 18 for selecting a received signal received by the specific receiving signal receiving antenna 14 among the plurality of receiving signal receiving antennas 14, and a received data processing means 23 for reconstituting an image of the sample P to be inspected from the received signal selected by the signal selection means 18.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决的问题：提供一种磁共振成像装置，其能够改善伴随着通过无线电通信发送的接收信号的空间中的传播的信号衰减引起的信噪比的降低。解决方案：该磁共振成像装置1具有接收线圈5，用于从待检查的样本P接收核磁共振信号作为接收信号;至少一个接收信号发送天线11，用于从通过无线电通信接收线圈5，用于接收从接收信号发送天线11发送的接收信号的多个接收信号接收天线14，用于选择由多个接收信号接收天线14中的特定接收信号接收天线14接收的接收信号的信号选择装置18 的接收信号接收天线14，以及接收的数据处理装置23，用于从由信号选择装置18选择的接收信号中重构待检查样本P.的图像。（C）2007，JPO和INPIT

3. 发明专利

JP2005323810A Magnetic resonance imaging device 有权
标题翻译：磁共振成像装置
公开(公告)号：JP2005323810A
公开(公告)日：2005-11-24
申请号：JP2004144706
申请日：2004-05-14
申请人： Toshiba Corp , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社 , 株式会社東芝
发明人： ADACHI KOHEI
IPC分类号： G01R33/36 , A61B5/055
摘要： PROBLEM TO BE SOLVED: To improve performance by efficiently using equipped A/D converters.
SOLUTION: This magnetic resonance imaging device is provided with the same number of A/D converters 904-j and 904-k as RF coils 81-j and 81-k. By a distributor 902 and a switch 903, magnetic resonance signals outputted by the RF coils 81-j and 81-k are inputted respectively to the A/D converters 904-j and 904-k in a first state, and a magnetic resonance signal outputted by the RF coil 81-j is inputted to the A/D converters 904-j and 904-k in a second state.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：通过有效地使用配备的A / D转换器来提高性能。解决方案：该磁共振成像装置具有与RF线圈81-j和81-k相同数量的A / D转换器904-j和904-k。通过分配器902和开关903，由RF线圈81-j和81-k输出的磁共振信号分别输入到第一状态的A / D转换器904-j和904-k，并且磁共振信号由RF线圈81-j输出的信号在第二状态下输入到A / D变换器904-j，904-k。版权所有（C）2006，JPO＆NCIPI

4. 发明专利

JP2005288025A Magnetic resonance imaging device 有权
标题翻译：磁共振成像装置
公开(公告)号：JP2005288025A
公开(公告)日：2005-10-20
申请号：JP2004111381
申请日：2004-04-05
申请人： Toshiba Corp , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社 , 株式会社東芝
发明人： ADACHI KOHEI
IPC分类号： G01R33/389 , A61B5/055 , G01R33/48
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive magnetic resonance imaging device, correcting a magnetic field change on a real time basis without putting restriction on a photographing sequence.
SOLUTION: This magnetic resonance imaging device includes: a temperature measuring sensor 16 for measuring a temperature change of an iron shim or the vicinity of the iron shim; a static magnetic field change correcting device 21 for calculating a differentiation term, an integration term and a proportional term of a measured temperature change, respectively, and estimating a change of a magnetic resonance frequency in a photographing section on the basis of calculation results; a digital oscillator 22 generating a corrected reference clock corresponding to the estimated change of the resonance frequency; and a control part 301 for controlling an inclined magnetic field coil driving device 17, a transmitter part 18 and a receiving part 19 on the basis of the corrected reference clock.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供廉价的磁共振成像装置，在不对拍摄顺序进行限制的情况下实时校正磁场变化。解决方案：该磁共振成像装置包括：用于测量铁垫片或铁垫片附近的温度变化的温度测量传感器16; 用于分别计算测量温度变化的微分项，积分项和比例项的静态磁场变化校正装置21，并且基于计算结果估计摄影部中的磁共振频率的变化; 数字振荡器22，产生对应于估计的谐振频率变化的校正参考时钟; 以及控制部301，用于根据校正后的基准时钟控制倾斜磁场线圈驱动装置17，发送部18以及接收部19。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2014039868A Magnetic resonance imaging apparatus 审中-公开
标题翻译：磁共振成像装置
公开(公告)号：JP2014039868A
公开(公告)日：2014-03-06
申请号：JP2013222222
申请日：2013-10-25
申请人： Toshiba Corp , 株式会社東芝 , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社
发明人： IWASA MASAAKI , NOGAMI KAZUTO , YOSHIDA TOMOYUKI , KOJIMA FUMITOSHI , SAKAKURA YOSHITOMO , ADACHI KOHEI
IPC分类号： A61B5/055
摘要： PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging apparatus that reduces variations in a center frequency f0 due to a delay of feedback control of a cooling device for cooling a gradient magnetic field coil.SOLUTION: A magnetic resonance imaging apparatus comprises a gradient magnetic field coil, a cooling device and a control section. The gradient magnetic field coil applies a gradient magnetic field to an inspection object placed inside a static magnetic field. The cooling device cools the gradient magnetic field coil. The control section controls the cooling device on the basis of a variation amount of a center frequency f0 of magnetic resonance.
摘要翻译：要解决的问题：提供一种磁共振成像装置，其减少由于用于冷却梯度磁场线圈的冷却装置的反馈控制的延迟而导致的中心频率f0的变化。解决方案：磁共振成像装置包括梯度磁励磁线圈，冷却装置和控制部。梯度磁场线圈对放置在静磁场内的检查对象施加梯度磁场。冷却装置冷却梯度磁场线圈。控制部根据磁共振的中心频率f0的变化量来控制冷却装置。

6. 发明专利

JP2010029640A Magnetic resonance imaging apparatus 有权
标题翻译：磁共振成像装置
公开(公告)号：JP2010029640A
公开(公告)日：2010-02-12
申请号：JP2009106627
申请日：2009-04-24
申请人： Toshiba Corp , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社 , 株式会社東芝
发明人： ADACHI KOHEI , HANAWA MASATOSHI , OKAMOTO KAZUYA
IPC分类号： A61B5/055 , G01R33/36 , G01R33/48
CPC分类号： G01R33/583 , G01R33/5659
摘要： PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging apparatus which reduces an influence of B1 inhomogeneity by always carrying out B1 shimming irrespective of characteristics of each subject.
SOLUTION: The magnetic resonance imaging apparatus includes an imaging condition acquiring means and an imaging means. The imaging condition acquiring means acquires at least one of an amplitude and a phase of such a high-frequency transmission signal as to reduce a deviation of data in at least one region of interest, that is, ROI A1, ROI B1, ROI B2, ROI B3 and ROI B4, set in an object. The imaging means acquires image data by imaging according to an imaging condition including at least the one of the amplitude and the phase.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种磁共振成像装置，其通过总是执行B1匀场来减少B1不均匀性的影响，而与每个对象的特征无关。解决方案：磁共振成像装置包括成像条件获取装置和成像装置。成像条件获取装置获取这样的高频传输信号的幅度和相位中的至少一个，以减少至少一个感兴趣的区域中的数据的偏差，即ROI A1，ROI B1，ROI B2， ROI B3和ROI B4，设置在一个对象中。成像装置根据包括幅度和相位中的至少一个的成像条件进行成像来获取图像数据。版权所有（C）2010，JPO＆INPIT

7. 发明专利

JP2006297067A Magnetic resonance imaging apparatus, method for selecting signal in this magnetic resonance imaging apparatus and magnetic resonance imaging method 有权
标题翻译：磁共振成像装置，用于选择该磁共振成像装置和磁共振成像方法中的信号的方法
公开(公告)号：JP2006297067A
公开(公告)日：2006-11-02
申请号：JP2006076962
申请日：2006-03-20
申请人： Toshiba Corp , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社 , 株式会社東芝
发明人： ADACHI KOHEI
IPC分类号： A61B5/055 , G01R33/3415
摘要： PROBLEM TO BE SOLVED: To enable a user to freely select and use an optional coil element.
SOLUTION: A local signal controller 89 controls PLL 80-1 to 80-m and mixers 81-1 to 81-m to convert magnetic resonance signals to be processed in magnetic resonance signals of plural receiving channels to signals of plural effective channels determined within a first frequency band, and to convert magnetic resonance signals of the other channels to those of determined within a second frequency band different from the first frequency band. A synthesizer 82 synthesizes the channel-converted signals. A diplexer 83 selects the signals within the first frequency band from the synthesized signals. A distributor 84 and a band-pass filter 85-1 to 85-n respectively separate the magnetic resonance signals of the plural effective channels from the selected signals.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了使用户能够自由地选择和使用可选的线圈元件。解决方案：本地信号控制器89控制PLL 80-1至80-m和混频器81-1至81-m，以将要处理的磁共振信号转换为多个接收信道的磁共振信号，以将多个有效信道的信号在第一频带内确定，并将其它信道的磁共振信号转换为在与第一频带不同的第二频带内确定的信号。合成器82合成通道转换信号。双工器83从合成信号中选择第一频带内的信号。分配器84和带通滤波器85-1至85-n分别从所选信号中分离出多个有效信道的磁共振信号。版权所有（C）2007，JPO＆INPIT

8. 发明专利

JP2014023961A Magnetic resonance imaging apparatus 有权
标题翻译：磁共振成像装置
公开(公告)号：JP2014023961A
公开(公告)日：2014-02-06
申请号：JP2013230274
申请日：2013-11-06
申请人： Toshiba Corp , 株式会社東芝 , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社
发明人： ADACHI KOHEI , HANAWA MASATOSHI , OKAMOTO KAZUYA
IPC分类号： A61B5/055
摘要： PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging apparatus that can reduce an influence of B1 inhomogeneity by performing universal B1 shimming irrespective of characteristics of each subject.SOLUTION: A magnetic resonance imaging apparatus comprises: a transmission/reception RF coil that transmits a high-frequency signal and receives an MR signal from a subject; storage means for storing at least one of an amplitude and a phase of the high-frequency signal for each imaging portion of the subject; input means for inputting imaging conditions including the imaging portion of the subject; and imaging means that reads at least one of the amplitude and the phase of the high-frequency signal corresponding to the imaging portion of the subject from the storage means and acquires image data by performing imaging with at least one of the amplitude and the phase as the imaging conditions.
摘要翻译：要解决的问题：提供一种磁共振成像装置，其可以通过执行通用的B1匀场来减少B1不均匀性的影响，而与每个被摄体的特征无关。解决方案：一种磁共振成像装置，包括：发送/接收RF线圈，高频信号并从被摄体接收MR信号; 存储装置，用于存储对象的每个成像部分的高频信号的幅度和相位中的至少一个; 用于输入包括被摄体的成像部分的成像条件的输入装置; 以及成像装置，其从存储装置中读取与被摄体的成像部分相对应的高频信号的幅度和相位中的至少一个，并通过以幅度和相位中的至少一个进行成像来获取图像数据，成像条件。

9. 发明专利

JP2009072580A Magnetic resonance apparatus and control method for the same 有权
标题翻译：磁共振装置及其控制方法
公开(公告)号：JP2009072580A
公开(公告)日：2009-04-09
申请号：JP2008218622
申请日：2008-08-27
申请人： Toshiba Corp , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社 , 株式会社東芝
发明人： ADACHI KOHEI , OKAMOTO KAZUYA
IPC分类号： A61B5/055 , G01R33/36
CPC分类号： G01R33/3692
摘要： PROBLEM TO BE SOLVED: To surely prevent waste of a battery for operating a transmitting unit.
SOLUTION: A magnetic resonance apparatus includes an RF coil 61 which receives a magnetic resonance signal from a subject, a transmitting unit 62 which transmits the magnetic resonance signal received by the RF coil 61 with a radio signal of a frequency band different from that of the magnetic resonance signal, a radio receiving circuit 83 which extracts the magnetic resonance signal from the radio signal, a battery 65 which supplies power to the transmitting unit 62, a power source switch 66 which turns on and off power supply from the battery 65 to the transmitting unit 62, a control signal transmitting circuit 84 which wirelessly transmits a startup signal expressing a startup and a stop signal expressing a stop, a receiving circuit 67 for control which receives the startup signal and the stop signal that have been wirelessly transmitted, and a receiving circuit 67 for control which controls the switch unit 66 to turn on the power supply when the receiving unit receives the startup signal and turn off the power supply when the receiving unit receives the stop signal.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：确保防止浪费用于操作发送单元的电池。解决方案：磁共振设备包括从主体接收磁共振信号的RF线圈61，发送单元62，其发射由RF线圈61接收的磁共振信号，该发射单元62具有不同于磁共振信号的一个，从无线电信号中提取磁共振信号的无线电接收电路83，向发送单元62供电的电池65，从电池接通和断开电源的电源开关66 65发送到发送单元62，控制信号发送电路84，其无线地发送表示启动的启动信号和表示停止的停止信号，用于接收已经无线发送的启动信号和停止信号的用于控制的接收电路67 以及用于控制的接收电路67，其在接收单元接收到开始时控制开关单元66接通电源当接收单元接收到停止信号时，关闭电源。版权所有（C）2009，JPO＆INPIT

10. 发明专利

JP2010104770A Magnetic resonance imaging apparatus and gradient coil cooling control method 有权
标题翻译：磁共振成像装置和等级线圈冷却控制方法
公开(公告)号：JP2010104770A
公开(公告)日：2010-05-13
申请号：JP2009186045
申请日：2009-08-10
申请人： Toshiba Corp , Toshiba Medical Systems Corp , 東芝メディカルシステムズ株式会社 , 株式会社東芝
发明人： IWASA MASAAKI , NOGAMI KAZUTO , YOSHIDA TOMOYUKI , KOJIMA FUMITOSHI , SAKAKURA YOSHITOMO , ADACHI KOHEI
IPC分类号： A61B5/055 , G01R33/32 , G01R33/385
CPC分类号： G01R33/3856 , G01R33/3804 , G01R33/3873
摘要： PROBLEM TO BE SOLVED: To reduce fluctuation in the center frequency (f0) caused by delay in feed-back control of a chiller for cooling a gradient coil. SOLUTION: A feedforward control unit 211 predicts the maximum value of the gradient coil 20 based on a power duty and a scan time of a pulse sequence, and a present temperature of the gradient coil 20. When the maximum value exceeds a predetermined upper limit, the feedforward control unit 211 then instructs a temperature adjusting unit 213 to start a water circulation in a chiller 200 at the start of a prescan, and the temperature adjusting unit 213 starts the water circulation based on the instruction. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：减少用于冷却梯度线圈的冷却器的反馈控制延迟引起的中心频率（f0）的波动。解决方案：前馈控制单元211基于脉冲序列的功率占空比和扫描时间以及梯度线圈20的当前温度来预测梯度线圈20的最大值。当最大值超过预定值时上限时，前馈控制单元211然后指示温度调节单元213在预扫描开始时开始冷却器200中的水循环，并且温度调节单元213基于该指令开始水循环。版权所有（C）2010，JPO＆INPIT

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