| 摘要 |
A method and apparatus are presented for quickly acquiring MR cardiac images in a time equivalent to a single breath-hold. MR data acquisition is segmented across multiple cardiac cycles. MR data acquisition is interleaved from each phase of a first cardiac cycle with MR data from each phase of a subsequent cardiac cycle. Preferably, low spatial frequency data are interleaved between multiple cardiac cycles, and the subsequent cardiac cycle acquisition includes sequential acquisition of high spatial frequency data at the tail end of the acquisition window. An MR image can then be reconstructed with data acquired from each of the acquisitions that reduce ghosting and artifacts. MR images are reconstructed using this interleaved variable temporal k-space sampling technique to produce volume images of the heart within a single breath-hold. Images can be acquired throughout the cardiac cycle to measure ventricular volumes and ejection fractions. Single phase volume acquisitions can also be performed to assess myocardial infarction.
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