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1. 发明申请

US20180106878A1 MAGNETIC RESONANCE IMAGING APPARATUS AND TRANSMISSION CONTROL METHOD 审中-公开
公开(公告)号：US20180106878A1
公开(公告)日：2018-04-19
申请号：US15820718
申请日：2017-11-22
申请人： TOSHIBA MEDICAL SYSTEMS CORPORATION
发明人： Kazuyuki SOEJIMA , Haruki NAKAMURA , Takuma KAWAI , Kazuya OKAMOTO
IPC分类号： G01R33/54 , G01R33/36 , A61B5/055 , A61B5/00 , G01R33/561
CPC分类号： G01R33/543 , A61B5/0037 , A61B5/055 , G01R33/36 , G01R33/3607 , G01R33/5612
摘要： 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.

2. 发明申请

US20170293006A1 MAGNETIC RESONANCE IMAGING APPARATUS 审中-公开
公开(公告)号：US20170293006A1
公开(公告)日：2017-10-12
申请号：US15481831
申请日：2017-04-07
申请人： Toshiba Medical Systems Corporation
发明人： Kazuyuki SOEJIMA , Kazuya OKAMOTO
IPC分类号： G01R33/44 , G01R33/54 , G01R33/46
摘要： According to one embodiment, a MRI apparatus includes an RF coil apparatus receiving MR signals by coil elements corresponding to channels, modurating the MR signals to have different frequencies for each of the channels, and outputting an analog multiplexed signal in which the MR signals with different frequencies are composited over the channels, and a receiver including ADC circuitry converting the analog multiplexed signal to a digital multiplexed signal, and predetermined number of separation channels separating the digital multiplexed signal, based on the number of the channels relating to composition of the MR signals with the different frequencies. The receiver stops a separation process of the digital multiplexed signal for separation channels not used in the separation process among the predetermined number of separation channels.

3. 发明申请

US20150015256A1 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：US20150015256A1
公开(公告)日：2015-01-15
申请号：US14326790
申请日：2014-07-09
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA MEDICAL SYSTEMS CORPORATION
发明人： Kazuyuki SOEJIMA
IPC分类号： G01R33/56
CPC分类号： G01R33/3621 , G01R33/3692
摘要： According to one embodiment, an MRI apparatus includes a data acquisition unit and an image generation unit. The data acquisition unit acquires an analog MR signal from an object and converts the analog MR signal into a digital MR signal. The image generation unit generates MR image data based on the digital MR signal. The data acquisition unit includes an AD converter, a signal processing part and a noise suppression part. The AD converter converts the analog MR signal, before a down conversion, into the digital MR signal, inside an imaging room. The signal processing part performs signal processing of the digital MR signal, inside the imaging room or outside the imaging room. The noise suppression part suppresses a noise arising caused by a conversion from the analog MR signal, before the down conversion, into the digital MR signal.
摘要翻译：根据一个实施例，MRI装置包括数据获取单元和图像生成单元。数据采集单元从对象获取模拟MR信号，并将模拟MR信号转换为数字MR信号。图像生成单元基于数字MR信号生成MR图像数据。数据采集单元包括AD转换器，信号处理部分和噪声抑制部分。 AD转换器将模拟MR信号在下变频之前转换成成像室内的数字MR信号。信号处理部分在成像室内或成像室外部执行数字MR信号的信号处理。噪声抑制部分抑制由下降转换之前的模拟MR信号转换成数字MR信号引起的噪声。

4. 发明申请

US20170371011A1 MAGNETIC RESONANCE IMAGING APPARATUS AND APPARATUS FOR MEASURING RADIO FREQUENCY OUTPUT FOR THE SAME 审中-公开
公开(公告)号：US20170371011A1
公开(公告)日：2017-12-28
申请号：US15681040
申请日：2017-08-18
申请人： TOSHIBA MEDICAL SYSTEMS CORPORATION
发明人： Haruki NAKAMURA , Kazuyuki SOEJIMA , Sojiyuuro KATO
IPC分类号： G01R33/34 , A61B5/00 , A61B5/055 , G01R33/36
CPC分类号： G01R33/34092 , A61B5/0037 , A61B5/055 , A61B5/7203 , G01R33/3607 , G01R33/3621
摘要： 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.

5. 发明申请

US20140232407A1 MAGNETIC RESONANCE IMAGING APPARATUS AND APPARATUS FOR MEASURING RADIO FREQUENCY OUTPUT FOR THE SAME 有权
标题翻译：用于测量无线电频率输出的磁共振成像装置和装置
公开(公告)号：US20140232407A1
公开(公告)日：2014-08-21
申请号：US14266195
申请日：2014-04-30
申请人： KABUSHIKI KAISHA TOSHIBA , TOSHIBA MEDICAL SYSTEMS CORPORATION
发明人： Haruki NAKAMURA , Kazuyuki SOEJIMA , Sojiyuuro KATO
IPC分类号： G01R33/34
CPC分类号： G01R33/34092 , A61B5/0037 , A61B5/055 , A61B5/7203 , G01R33/3607 , G01R33/3621
摘要： 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.
摘要翻译：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。

6. 发明申请

US20140070809A1 MAGNETIC RESONANCE IMAGING APPARATUS AND A POWER CONTROL METHOD OF A MAGNETIC RESONANCE IMAGING APPARATUS 有权
标题翻译：磁共振成像装置和磁共振成像装置的功率控制方法
公开(公告)号：US20140070809A1
公开(公告)日：2014-03-13
申请号：US14068385
申请日：2013-10-31
申请人： TOSHIBA MEDICAL SYSTEMS CORPORATION , KABUSHIKI KAISHA TOSHIBA
发明人： Naoki IMAMURA , Motohisa YOKOI , Kazuyuki SOEJIMA , Motohiro MIURA , Sho KAWAJIRI , Haruki NAKAMURA
IPC分类号： G01R33/36
CPC分类号： G01R33/36
摘要： 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.
摘要翻译：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。

7. 发明申请

US20180031658A1 MAGNETIC RESONANCE IMAGING APPARATUS 审中-公开
公开(公告)号：US20180031658A1
公开(公告)日：2018-02-01
申请号：US15665887
申请日：2017-08-01
申请人： Toshiba Medical Systems Corporation
发明人： Takahiro KOBAYASHI , Kazuyuki SOEJIMA , Sojiyuuro KATO , Haruki NAKAMURA
IPC分类号： G01R33/54
CPC分类号： G01R33/54 , G01R33/5608
摘要： 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.

8. 发明申请

US20170293002A1 MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD OF INSTALLING MAGNETIC RESONANCE IMAGING APPARATUS 审中-公开
公开(公告)号：US20170293002A1
公开(公告)日：2017-10-12
申请号：US15631281
申请日：2017-06-23
申请人： Toshiba Medical Systems Corporation
发明人： Kazuyuki SOEJIMA , Naoki IMAMURA , Naho IMAMURA
IPC分类号： G01R33/34 , G01R33/36 , G01R33/54 , G01R33/30
CPC分类号： G01R33/34007 , A61B5/0555 , G01R33/30 , G01R33/36 , G01R33/3614 , G01R33/3802 , G01R33/422 , G01R33/543
摘要： According to one embodiment, a magnetic resonance imaging apparatus installed in a shield room comprises a gantry, a table, and at least one unit. The gantry includes a static magnetic field magnet, a gradient magnetic field coil, and an RF coil. The subject is to be placed on the table. The at least one unit relates to control of the magnetic resonance imaging apparatus and is configured to include at least one opening on a upper surface on for maintenance and inspection.

9. 发明申请

US20170082706A1 MAGNETIC RESONANCE IMAGING APPARATUS AND WIRELESS RF COIL APPARATUS 审中-公开
公开(公告)号：US20170082706A1
公开(公告)日：2017-03-23
申请号：US15230905
申请日：2016-08-08
申请人： Toshiba Medical Systems Corporation
发明人： Kazuyuki SOEJIMA
IPC分类号： G01R33/36 , H04W56/00 , H04L7/00 , H04W4/00
CPC分类号： G01R33/3692 , G01R33/307 , G01R33/34 , G01R33/36 , G01R33/3607 , G01R33/3614 , G01R33/3621 , G01R33/3628 , H04L7/0012 , H04W4/70 , H04W56/0015
摘要： A wireless RF coil unit according to the embodiment includes at least one receiver, a converter, a mixer and a filter. The at least one receiver receive a first analog signal having a first frequency synchronized with a first clock of a device different from the coil unit, and a second analog signal having a second frequency different from the first frequency. The converter converts the first analog signal into a first digital signal, and the second analog signal into a second digital signal, in accordance with a second clock of the coil unit. The mixer generates a multiplication signal of the first digital signal and the second digital signal. The filter passes a predetermined frequency component in the multiplication signal and outputs an intermediated frequency signal.

10. 发明申请

US20140132266A1 MAGNETIC RESONANCE IMAGING APPARATUS AND TRANSMISSION CONTROL METHOD 有权
标题翻译：磁共振成像装置和传动控制方法
公开(公告)号：US20140132266A1
公开(公告)日：2014-05-15
申请号：US14162094
申请日：2014-01-23
申请人： TOSHIBA MEDICAL SYSTEMS CORPORATION , KABUSHIKI KAISHA TOSHIBA
发明人： Kazuyuki SOEJIMA , Haruki NAKAMURA , Takuma KAWAI , Kazuya OKAMOTO
IPC分类号： G01R33/54 , G01R33/36
CPC分类号： G01R33/543 , A61B5/0037 , A61B5/055 , G01R33/36 , G01R33/3607 , G01R33/5612
摘要： 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.
摘要翻译：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。

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