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公开(公告)号：EP4224192A1
公开(公告)日：2023-08-09
申请号：EP22154813.4
申请日：2022-02-02
IPC分类号： G01R33/385 , G01R33/54 , G01R33/483
摘要： For operating an MR scanner (5), which comprises gradient coils (7) for generating a field gradient along coordinate axes of a coil coordinate system (X, Y, Z), limit values concerning the field gradient in the coil coordinate system (X, Y, Z) and an MR scan protocol are received. Expected orientations of a logical coordinate system (R, P, S) are determined and for each of them, a compliant value for a timing parameter is determined and stored in a database. The MR scanner (5) is controlled to carry out an MR scan and afterwards the orientation is set to a first orientation. A first value for the timing parameter according to the first orientation is determined based on the database and the MR scanner (5) is controlled to carry out a scan sequence according to the first orientation and first value.
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公开(公告)号：EP4009066A1
公开(公告)日：2022-06-08
申请号：EP20212205.7
申请日：2020-12-07
发明人： Bhat, Himanshu , Giese, Daniel , Grodzki, David , Majeed, Waqas , Speier, Peter
IPC分类号： G01R33/385 , G01R33/48 , G01R33/54 , G01R33/483 , G01R33/561
摘要： According to a method for operating an MRI system (1), an orientation of a logical coordinate system (R, P, S) and a first limit value concerning components of a magnetic field gradient in a coil coordinate system (X, Y, Z) are received. A second limit value concerning respective components of the magnetic field gradient in a logical coordinate system (R, P, S) is determined depending on the orientation and the first limit value. A gradient sequence for the logical coordinate system (R, P, S) is determined depending on the second limit value to implement a k-space sampling scheme. The MRI system (1) is controlled to carry out an MRI scan according to the k-space sampling scheme and the gradient sequence.
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