| 摘要 |
The invention relates to a device for MR imaging of a body (7) placed in an examination volume, the device (1) comprising means (2) for establishing a substantially homogeneous main magnetic field in the examination volume, means (3, 4, 5) for generating switched magnetic field gradients superimposed upon the main magnetic field, means (6) for radiating RF pulses towards the body (7), control means (12) for controlling the generation of the magnetic field gradients and the RF pulses, means (10) for receiving and sampling MR signals, and reconstruction means (14) for forming MR images from the signal samples. According to the invention, the device is arranged to a) generate a sequence of MR echo signals by subjecting at least a portion of the body (7) to a single RF pulse and a plurality of switched magnetic field gradients, the switched magnetic field gradients being controlled to produce at least two subsequences of MR echo signals, wherein each sub-sequence traverses a different trajectory in k-space with subsampling in the phase encoding direction (k<SUB>y</SUB>); b) acquire and sample the MR echo signals; c) reconstruct an MR image from the signal samples and from phase/amplitude correction maps associated with the sub-sequences of MR echo signals. |
