METHOD AND DEVICE FOR CONTROLLING A MAGNETIC RESONANCE IMAGING APPARATUS

摘要

Starting with a magnetic resonance imaging system control sequence that has a radio-frequency (RF) pulse train to control the RF transmission system and a gradient pulse train, chronologically matching the RF pulse train, to control the gradient system, the gradient pulse train including a predetermined selection gradient pulse chronologically matched to a refocusing pulse of the RF pulse train, the execution capability of the control sequence is initially established using an execution capability criterion, in particular under consideration of a refocusing flip angle of the refocusing pulse. Modification of the refocusing pulse and/or of the selection gradient pulse takes place depending on the establishment of the execution capability of the control sequence.

主权项

1. A method to determine a control sequence for a magnetic resonance imaging apparatus comprising an RF transmission system and a gradient system, said method comprising:
providing a computerized processor with a control sequence comprising a radio-frequency pulse train that controls the RF transmission system and a gradient pulse train, chronologically matching said radio-frequency pulse train, to control said gradient system, said gradient pulse train including a predetermined selection gradient pulse chronologically matched to a refocusing pulse in said radio-frequency pulse train; in said computerized processor, automatically establishing an execution capability of said control sequence by applying an execution capability criterion to said control sequence, said execution capability criterion embodying a criterion for a refocusing flip angle of said refocusing pulse; in said computerized processor, if said control sequence does not already satisfy said execution capability criterion, modifying at least one of said refocusing pulse or said selection gradient pulse to produce a modified control sequence that is closer to satisfying said execution capability criterion than said control sequence; and making said modified control sequence available at an output of the computerized processor in an electronic format for controlling said magnetic resonance imaging apparatus.