公开(公告)号：US20190146044A1

公开(公告)日：2019-05-16

申请号：US16191927

申请日：2018-11-15

申请人： Canon Medical Systems Corporation

发明人： Takaya Mori ,  Keiichiro Ishi ,  Yoshimori Kassai ,  Sho Tanaka

IPC分类号： G01R33/24 ,  G01R33/385 ,  G06T7/00 ,  A61B5/055

摘要： According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry calculates power of a first RF magnetic field required for excitation at a first flip angle in a first target slice, acquires information on inhomogeneity of a transmission RF magnetic field for a cross section crossing the first target slice, and calculate power of a second RF magnetic field required for excitation at a second flip angle in a second target slice different from the first target slice for the cross section by using the information and the first RF magnetic field power.

公开(公告)号：US11249154B2

公开(公告)日：2022-02-15

申请号：US16191927

申请日：2018-11-15

申请人： Canon Medical Systems Corporation

发明人： Takaya Mori ,  Keiichiro Ishi ,  Yoshimori Kassai ,  Sho Tanaka

IPC分类号： G01R33/24 ,  G01R33/385 ,  A61B5/055 ,  G06T7/00 ,  G01R33/565 ,  G01R33/54 ,  G01R33/483 ,  G01R33/58

摘要： According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry calculates power of a first RF magnetic field required for excitation at a first flip angle in a first target slice, acquires information on inhomogeneity of a transmission RF magnetic field for a cross section crossing the first target slice, and calculate power of a second RF magnetic field required for excitation at a second flip angle in a second target slice different from the first target slice for the cross section by using the information and the first RF magnetic field power.

公开(公告)号：US10928469B2

公开(公告)日：2021-02-23

申请号：US15967793

申请日：2018-05-01

申请人： CANON MEDICAL SYSTEMS CORPORATION

发明人： Satoshi Imai ,  Sadanori Tomiha ,  Keiichiro Ishi ,  Takaya Mori

IPC分类号： G01R33/36 ,  G01R33/54 ,  G01R33/483 ,  G01R33/58

摘要： A magnetic resonance imaging apparatus according to an embodiment includes a transmission coil and processing circuitry. The transmission coil is configured to apply a high frequency magnetic field to an object. The processing circuitry is configured to: derive, based on at least one of an imaging region and the body shape data of the object, a specific area in a field of view (FOV); and determine, based on a signal within the specific area, an output power level of a high frequency pulse signal supplied to the transmission coil.