| 摘要 |
This invention relates to a method and apparatus for estimating artifacts in the image reconstruction of an object of interest (101). The inventive apparatus comprises a coil arrangement (105) comprising at least one transmitting coil (109, 109') for generating a primary magnetic field to be applied to the object of interest (101), and at least one measurement coil (110, 110') for measuring electrical signals induced by a secondary magnetic field, the secondary magnetic field being generated by the object of interest in response to the primary magnetic field; motion sensing means (112, 114, 112', 114'; 312, 314, 312', 314') for sensing a relative motion between the object of interest (101) and the coil arrangement (105) and generating a trigger signal when the relative motion occurs; and a processor (125) for calculating, in response to the trigger signal, a change of the conductivity distribution of the object of interest, based on the electrical signals measured before and after the relative motion, the change of the conductivity distribution representing artifacts caused by the relative motion. |
