| 摘要 |
<p>Apparatus (and a method) is described for acquiring magnetic resonance imaging data for an object or region (16) under examination by means of the stray field associated with an NMR magnet (10) housing a main coil (20). In order to obtain data from different slices through the object or region (16) without the need for physical movement between the object or region and the NMR magnet (10), the stray field is varied to change its intensity profile in relation to the object or region. In one example, this is done by controlling the current applied to an additional coil (12) housed by the magnet and disposed either beside, outside or inside the main coil (20). The object or region of interest (16) may be located wholly or partially within either or both of the coils (12, 20), or may be disposed completely outside the magnet (10).</p> |
