| 摘要 |
<p>When a magnetic resonance imaging sequence is retrieved from memory (58), one of the slice select, phase-encode and read gradient profiles are retrieved for one of the slice select, phase-encode, read gradients. Reference and motion sensitised profiles of one of these gradients have a common field of view or slice thickness, but have different motion sensitisations. The reference gradient profile G1 stored in a memory (52) and the motion sensitised gradient profile G stored in a memory (56) are weighted (60, 62) by weighting functions α1, α2 which are selected in accordance with the selected motion sensitivity and a selected one of the field of view or slice thickness. The weighted profiles are combined (64) to generate a motion sensitised gradient with the selected motion sensitivity, field of view or slice thickness. The combined weighted gradient profile and the reference gradient profile are used in imaging sequences to generate reference and motion sensitised data lines (82, 84) which are reconstructed (86) into a reference image representation and a motion sensitised image representation. A moving tissue only image representation can be obtained (88) as well.</p> |
