| 摘要 |
In order to perform an ECG-gating imaging MR scan with an exact ECG-gating time predetermined, in an MRI system and MR imaging method, an ECG signal of a patient is acquired. A preparing MR scan with a region containing an object to be imaged of the patient starts at each of a plurality of time instants when a plurality of different delay times elapse respectively from a plurality of reference waves included and repeated in series in the signal, thus a plurality of preparing images being produced. An appropriate or optimum ECG-gating time instant is determined using the plurality of preparing images. The imaging MR scan with the region of the patient is then performed in synchronization with the appropriate or optimum ECG-gating time instant. For example, both of the preparing MR scan and the imaging MR scan are based on the same type of pulse sequences. The pulse sequences include a fast SE sequence, a sequence rooted in the fast SE sequence, or a segmented fast FE sequence. Even if the imaging scan is three-dimensional imaging, it is enough that the preparing MR scan is two-dimensional scanning.
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