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    • 1. 发明申请
    • GRADIENT FIELD POWER SUPPLY AND MAGNETIC RESONANCE IMAGING APPARATUS
    • 梯级电源和磁共振成像装置
    • US20110187370A1
    • 2011-08-04
    • US13016036
    • 2011-01-28
    • Masashi HoriMotohiro MiuraKazuhiro Hamaya
    • Masashi HoriMotohiro MiuraKazuhiro Hamaya
    • G01R33/44
    • G01R33/44
    • According to one embodiment, there is provided a magnetic resonance imaging apparatus in which a gradient field power supply apparatus supplies currents to gradient field coils corresponding to spatial coordinate axis directions to form gradient fields in a static field space which change along the respective spatial coordinate axis directions, the gradient field power supply apparatus includes a transformer configured to supply power supplied to a primary winding to a current output circuit via a plurality of secondary windings, with the number of phases of the primary windings being equal to or a multiple of the number of phases of the secondary windings, and the secondary windings of the respective phases of output channels corresponding to the respective spatial coordinate axis directions being wound around the primary windings of the respective phases.
    • 根据一个实施例,提供了一种磁共振成像装置,其中梯度场电源装置向对应于空间坐标轴方向的梯度场线圈提供电流,以在静态场空间中形成梯度场,其沿着相应的空间坐标轴 梯度场电源装置包括:变压器,被配置为通过多个次级绕组向初级绕组提供供给到电流输出电路的电力,其中初级绕组的相数等于或数量的倍数 次级绕组的相位和对应于各个空间坐标轴方向的输出通道的各相的次级绕组缠绕在各相的初级绕组上。
    • 2. 发明授权
    • Gradient field power supply and magnetic resonance imaging apparatus
    • 梯度场电源和磁共振成像装置
    • US08692552B2
    • 2014-04-08
    • US13016036
    • 2011-01-28
    • Masashi HoriMotohiro MiuraKazuhiro Hamaya
    • Masashi HoriMotohiro MiuraKazuhiro Hamaya
    • G01V3/00
    • G01R33/44
    • According to one embodiment, there is provided a magnetic resonance imaging apparatus in which a gradient field power supply apparatus supplies currents to gradient field coils corresponding to spatial coordinate axis directions to form gradient fields in a static field space which change along the respective spatial coordinate axis directions, the gradient field power supply apparatus includes a transformer configured to supply power supplied to a primary winding to a current output circuit via a plurality of secondary windings, with the number of phases of the primary windings being equal to or a multiple of the number of phases of the secondary windings, and the secondary windings of the respective phases of output channels corresponding to the respective spatial coordinate axis directions being wound around the primary windings of the respective phases.
    • 根据一个实施例,提供了一种磁共振成像装置,其中梯度场电源装置向对应于空间坐标轴方向的梯度场线圈提供电流,以在静态场空间中形成梯度场,其沿着相应的空间坐标轴 梯度场电源装置包括:变压器,被配置为通过多个次级绕组向初级绕组提供供给到电流输出电路的电力,其中初级绕组的相数等于或数量的倍数 次级绕组的相位和对应于各个空间坐标轴方向的输出通道的各相的次级绕组缠绕在各相的初级绕组上。
    • 3. 发明授权
    • Magnetic resonance imaging apparatus and control device of a magnetic resonance imaging apparatus
    • 磁共振成像装置和磁共振成像装置的控制装置
    • US08907672B2
    • 2014-12-09
    • US13615891
    • 2012-09-14
    • Masashi HoriMotohiro Miura
    • Masashi HoriMotohiro Miura
    • G01R3/00G01R33/385G01R33/565G01R33/48
    • G01R33/54G01R33/3852G01R33/4818G01R33/56545G01R33/56554G01R33/56572
    • A control device of a magnetic resonance imaging (MRI) apparatus includes a condition setting unit and a judging unit. The condition setting unit sets an imaging sequence to be performed by the MRI apparatus based on set conditions of the set imaging sequence. The judging unit then (a) calculates a value of electric current that would need to be supplied to a gradient magnetic field coil of the MRI apparatus to perform that set imaging sequence based on the set conditions of the set imaging sequence, (b) calculates a value of voltage that would need to be applied to the gradient magnetic field coil based on a mutual inductance of the gradient magnetic field to cause electric current flowing to the gradient magnetic field coil to equal to the value of the calculated electric current, and (c) judges whether the set imaging sequence is practicable or not based on the calculated value of voltage.
    • 磁共振成像(MRI)装置的控制装置包括条件设置单元和判断单元。 条件设定部基于所设定的成像序列的设定条件来设定由MRI装置进行的成像序列。 判断单元然后(a)计算需要提供给MRI装置的梯度磁场线圈的电流值,以根据设定的成像序列的设定条件执行该设定的成像序列,(b)计算 基于梯度磁场的互感将需要施加到梯度磁场线圈的电压的值,以使流过梯度磁场线圈的电流等于计算出的电流的值,以及( c)基于计算的电压值来判断所设置的成像序列是否可行。