| 摘要 |
PURPOSE: To well ensure an SIN ratio and to reduce chemical shift quantity by altering a sampling pitch with respect to at least one of a phase encoding direction and a reading direction. CONSTITUTION: A controller 6 drives an RF sequencer 9 and an inclined magnetic field sequencer 5 and clears the sampling number (n) of times when the start time of signal collection arrives at every repetition of signal collection. That is, the controller 6 issues the command of 'narrow band collection' as the initial mode of MR signal collection and issues the command of a reading inclined magnetic field determined from a sampling pitch =ΔT to the inclined magnetic field sequencer 5. Further, the controller 6 integrates and counts the sampling number (n) of times from the start of sampling and issues the command of 'wide band collection' in place of 'narrow band collection' when the count value becomes a reference value to issue the command of the reading inclined magnetic field determined from a sampling pitch,ΔT' (<ΔT) to the inclined magnetic field sequencer 5.
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