公开(公告)号：US20140232407A1

公开(公告)日：2014-08-21

申请号：US14266195

申请日：2014-04-30

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA MEDICAL SYSTEMS CORPORATION

Inventor： Haruki NAKAMURA ,  Kazuyuki SOEJIMA ,  Sojiyuuro KATO

IPC: G01R33/34

CPC classification number: G01R33/34092 ,  A61B5/0037 ,  A61B5/055 ,  A61B5/7203 ,  G01R33/3607 ,  G01R33/3621

Abstract: An apparatus for measuring radio frequency output for a magnetic resonance imaging apparatus includes a plurality of directional couplers, a comparator, a switcher and a converter. The plurality of directional couplers are different in degree of coupling from each other, and attenuate an RF signal which is generated in an RF signal generator and amplified in an RF power amplifier. The comparator compares input-level information of a signal inputted into the RF power amplifier with a threshold value. The switcher switches to any one of the plurality of the directional couplers based on a result of the comparison so as to output an RF signal by the one directional coupler. The converter performs a digital conversion of the RF signal from the one directional coupler so as to output a digital signal.

Abstract translation: 用于测量磁共振成像设备的射频输出的装置包括多个定向耦合器，比较器，切换器和转换器。 多个定向耦合器在彼此耦合的程度上不同，并且衰减在RF信号发生器中产生并在RF功率放大器中放大的RF信号。 比较器将输入到RF功率放大器的信号的输入电平信息与阈值进行比较。 切换器基于比较的结果切换到多个定向耦合器中的任何一个，以便通过一个定向耦合器输出RF信号。 转换器执行来自一个定向耦合器的RF信号的数字转换，以输出数字信号。

公开(公告)号：US20140070809A1

公开(公告)日：2014-03-13

申请号：US14068385

申请日：2013-10-31

Applicant: TOSHIBA MEDICAL SYSTEMS CORPORATION ,  KABUSHIKI KAISHA TOSHIBA

Inventor： Naoki IMAMURA ,  Motohisa YOKOI ,  Kazuyuki SOEJIMA ,  Motohiro MIURA ,  Sho KAWAJIRI ,  Haruki NAKAMURA

IPC: G01R33/36

CPC classification number: G01R33/36

Abstract: In one embodiment, an MRI apparatus (20A) includes a data acquisition system (22, 24, 26, 28, 29, 40, 42, 44, 46 and 48), a charge/discharge element (BAT) and a power control unit (52 and 309). The data acquisition system acquires nuclear magnetic resonance signals from an imaging region by performing a scan. The charge/discharge element is a part of an electric power system (304, 308a, 52, BD and BAU) of the MRI apparatus, and is charged with external electric power. The power control unit controls the electric power system in such a manner that at least one unit excluding the data acquisition system is supplied with electric power from the charge/discharge element.

Abstract translation: 在一个实施例中，MRI装置（20A）包括数据采集系统（22,24,26,28,29,40,42,44,46和48），充电/放电元件（BAT）和功率控制单元 （52和309）。 数据采集​​系统通过执行扫描从成像区域获取核磁共振信号。 充电/放电元件是MRI设备的电力系统（304,308a，52，BD和BAU）的一部分，并且被外部电力充电。 电力控制单元以从充电/放电元件向电力供给除了数据采集系统的至少一个单元的方式控制电力系统。

公开(公告)号：US20140132266A1

公开(公告)日：2014-05-15

申请号：US14162094

申请日：2014-01-23

Applicant: TOSHIBA MEDICAL SYSTEMS CORPORATION ,  KABUSHIKI KAISHA TOSHIBA

Inventor： Kazuyuki SOEJIMA ,  Haruki NAKAMURA ,  Takuma KAWAI ,  Kazuya OKAMOTO

IPC: G01R33/54 ,  G01R33/36

CPC classification number: G01R33/543 ,  A61B5/0037 ,  A61B5/055 ,  G01R33/36 ,  G01R33/3607 ,  G01R33/5612

Abstract: According to one embodiment, a magnetic resonance imaging apparatus provided with a plurality of transmission channels includes a signal processing unit and a control unit. The signal processing unit acquires a radio frequency magnetic field emitted from each of the plurality of transmission channels through a receiver coil mounted on an object and measure a phase of the radio frequency magnetic field. The control unit determines a phase difference between the plurality of transmission channels based on the phase of the radio frequency magnetic field of each of the plurality of transmission channels measured by the signal processing unit. The control unit controls a phase of a radio frequency pulse inputted to each of the plurality of transmission channels, based on the phase difference.

Abstract translation: 根据一个实施例，具有多个传输通道的磁共振成像设备包括信号处理单元和控制单元。 信号处理单元通过安装在物体上的接收器线圈获取从多个传输通道中的每一个发射的射频磁场，并测量射频磁场的相位。 控制单元基于由信号处理单元测量的多个传输通道中的每一个的射频磁场的相位来确定多个传输信道之间的相位差。 控制单元基于相位差控制输入到多个传输信道中的每一个的射频脉冲的相位。

公开(公告)号：US20160003925A1

公开(公告)日：2016-01-07

申请号：US14750272

申请日：2015-06-25

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA MEDICAL SYSTEMS CORPORATION

Inventor： Haruki NAKAMURA ,  Kazuyuki SOEJIMA

IPC: G01R33/34 ,  G01R33/565 ,  G01R33/36

CPC classification number: G01R33/5659 ,  G01R33/288 ,  G01R33/3614

Abstract: According to one embodiment, an MRI apparatus includes an amplifier and processing circuitry. The amplifier amplifies an RF pulse and outputs the amplified RF pulse to an RF coil. The processing circuitry performs correction processing on an envelope of an RF pulse to be inputted to the amplifier so as to compensate nonlinear input-output characteristics of the amplifier. As to this correction processing, the processing circuitry selects a correction information item out of a plurality of correction information items prepared for a corresponding plurality of imaging conditions and performs the correction processing by using the selected information item.

Abstract translation: 根据一个实施例，MRI装置包括放大器和处理电路。 放大器放大RF脉冲，并将放大的RF脉冲输出到RF线圈。 处理电路对要输入到放大器的RF脉冲的包络进行校正处理，以补偿放大器的非线性输入 - 输出特性。 关于该校正处理，处理电路从针对对应的多个成像条件准备的多个校正信息项中选择校正信息项，并且使用所选择的信息项执行校正处理。

公开(公告)号：US20140300362A1

公开(公告)日：2014-10-09

申请号：US14314465

申请日：2014-06-25

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA MEDICAL SYSTEMS CORPORATION

Inventor： Sho KAWAJIRI ,  Motohisa YOKOI ,  Motohiro MIURA ,  Masashi HORI ,  Kazuyuki SOEJIMA ,  Naoki IMAMURA ,  Haruki NAKAMURA

IPC: G01R33/385

CPC classification number: G01R33/3852 ,  A61B5/055 ,  G01R33/5616

Abstract: A magnetic resonance imaging device according to an embodiment includes a gradient amplifier, a battery, a detector, and a battery controller. The gradient amplifier supplies electric power to the gradient coil. The battery is charged with electric power that is supplied from the power supply. The detector detects a high power output request on the gradient amplifier. The battery controller controls to supply electric power charged in the battery in addition to electric power supplied from the power supply to the gradient amplifier when the high power output request is detected.

Abstract translation: 根据实施例的磁共振成像装置包括梯度放大器，电池，检测器和电池控制器。 梯度放大器向梯度线圈提供电力。 电池由电源供电。 检测器在梯度放大器上检测到高功率输出请求。 当检测到高功率输出请求时，电池控制器控制除了从电源向梯度放大器提供的电力之外，还提供充电电池中的电力。

公开(公告)号：US20140070812A1

公开(公告)日：2014-03-13

申请号：US14068361

申请日：2013-10-31

Applicant: TOSHIBA MEDICAL SYSTEMS CORPORATION ,  KABUSHIKI KAISHA TOSHIBA

Inventor： Motohisa YOKOI ,  Motohiro MIURA ,  Sho KAWAJIRI ,  Kazuyuki SOEJIMA ,  Haruki NAKAMURA ,  Naoki IMAMURA

IPC: G01R33/48 ,  A61B6/03

CPC classification number: G01R33/48 ,  A61B6/03 ,  A61B6/032 ,  A61B6/56 ,  G01R33/36

Abstract: In one embodiment, the image diagnosis apparatus (20) generates image data of an object by using external electric power, and includes a charge/discharge element (BA1, . . . BAn) and a charge/discharge control circuit (140, 152). The charge/discharge element is charged with the external electric power and supply a part of the consumed power of the image diagnosis apparatus by discharging. The charge/discharge control circuit controls charge and discharge of the charge/discharge element in such a manner that the charge/discharge element discharges in a period during which the consumed power is larger than a predetermined power amount and the charge/discharge element is charged in a period during which the consumed power is smaller than the predetermined power amount.

Abstract translation: 在一个实施例中，图像诊断装置（20）通过使用外部电力产生对象的图像数据，并且包括充电/放电元件（BA1，...，BAn）和充电/放电控制电路（140,152） 。 充电/放电元件被外部电力充电，并通过放电来提供图像诊断装置的消耗功率的一部分。 充放电控制电路以充电/放电元件在消耗功率大于预定电力量并且充电/放电元件充电的时段内放电的方式控制充电/放电元件的充电和放电 在消耗功率小于预定功率量的期间。

公开(公告)号：US20180106878A1

公开(公告)日：2018-04-19

申请号：US15820718

申请日：2017-11-22

Applicant: TOSHIBA MEDICAL SYSTEMS CORPORATION

Inventor： Kazuyuki SOEJIMA ,  Haruki NAKAMURA ,  Takuma KAWAI ,  Kazuya OKAMOTO

IPC: G01R33/54 ,  G01R33/36 ,  A61B5/055 ,  A61B5/00 ,  G01R33/561

CPC classification number: G01R33/543 ,  A61B5/0037 ,  A61B5/055 ,  G01R33/36 ,  G01R33/3607 ,  G01R33/5612

Abstract: According to one embodiment, a magnetic resonance imaging apparatus provided with a plurality of transmission channels includes a signal processing unit and a control unit. The signal processing unit acquires a radio frequency magnetic field emitted from each of the plurality of transmission channels through a receiver coil mounted on an object and measure a phase of the radio frequency magnetic field. The control unit determines a phase difference between the plurality of transmission channels based on the phase of the radio frequency magnetic field of each of the plurality of transmission channels measured by the signal processing unit. The control unit controls a phase of a radio frequency pulse inputted to each of the plurality of transmission channels, based on the phase difference.

公开(公告)号：US20170371011A1

公开(公告)日：2017-12-28

申请号：US15681040

申请日：2017-08-18

Applicant: TOSHIBA MEDICAL SYSTEMS CORPORATION

Inventor： Haruki NAKAMURA ,  Kazuyuki SOEJIMA ,  Sojiyuuro KATO

IPC: G01R33/34 ,  A61B5/00 ,  A61B5/055 ,  G01R33/36

CPC classification number: G01R33/34092 ,  A61B5/0037 ,  A61B5/055 ,  A61B5/7203 ,  G01R33/3607 ,  G01R33/3621

Abstract: An apparatus for measuring radio frequency output for a magnetic resonance imaging apparatus includes a plurality of directional couplers, a comparator, a switcher and a converter. The plurality of directional couplers are different in degree of coupling from each other, and attenuate an RF signal which is generated in an RF signal generator and amplified in an RF power amplifier. The comparator compares input-level information of a signal inputted into the RF power amplifier with a threshold value. The switcher switches to any one of the plurality of the directional couplers based on a result of the comparison so as to output an RF signal by the one directional coupler. The converter performs a digital conversion of the RF signal from the one directional coupler so as to output a digital signal.

公开(公告)号：US20180031658A1

公开(公告)日：2018-02-01

申请号：US15665887

申请日：2017-08-01

Applicant: Toshiba Medical Systems Corporation

Inventor： Takahiro KOBAYASHI ,  Kazuyuki SOEJIMA ,  Sojiyuuro KATO ,  Haruki NAKAMURA

IPC: G01R33/54

CPC classification number: G01R33/54 ,  G01R33/5608

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes first generating circuitry and second generating circuitry. The first generating circuitry interpolates a first data string of digital data including envelope information of a radio frequency (RF) pulse to be output, thereby generating a second data string in which a variation amount of digital data adjacent to each other in the first data string is smaller than an upper limit value. The second generating circuitry generates a signal of the RF pulse by combining the second data string generated by the first generating circuitry and information relating to a carrier wave of the RF pulse, and outputs the signal to an RF amplifier.

公开(公告)号：US20170261573A1

公开(公告)日：2017-09-14

申请号：US15448240

申请日：2017-03-02

Applicant: Toshiba Medical Systems Corporation

Inventor： Haruki NAKAMURA ,  Yuji Takano

IPC: G01R33/36 ,  G01R33/54

CPC classification number: G01R33/3614 ,  G01R33/543 ,  G01R33/583

Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes an amplifier, a capacitor bank, and processing circuitry. The amplifier supplies, based on an imaging sequence, an RF pulse to an RF coil which generates a radio frequency magnetic field. The capacitor bank supplies an electric power to the amplifier. The processing circuitry judges whether an imaging by the imaging sequence is able to be executed, based on a condition of the RF pulse in the imaging sequence and an output efficiency of the amplifier.