| 摘要 |
PROBLEM TO BE SOLVED: To provide favorable image contrast, and reduce artifact in an SAR-reduced non-rectangular frame imaging method. SOLUTION: The flip angle is varied in non-rectangular frame measurement to reduce SAR. In re-disposing each set of sampling data of obtained echo signals in rectangular frame coordinates, a weight coefficient is determined to act in such a way that sampling data of favorable SNR are disposed at a lattice point in a low space frequency zone in space k with a high contribution ratio. Echo signal obtaining time is also taken into consideration for the weight coefficient for reducing contribution of low-grade data. COPYRIGHT: (C)2009,JPO&INPIT
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