Patent ID: 8498688

Claim:
A device for magnetic resonance (MR) imaging of a body placed in an examination volume, the device comprising: a main magnet configured to establish a substantially homogeneous main magnetic field in the examination volume; coils configured to generate switched magnetic field gradients superimposed upon the main magnetic field; an antenna configured to radiate radio frequency (RF) pulses towards the body; a controller configured to control the coils and the antenna to generate the magnetic field gradients and the RF pulses; a receiver for receiving and sampling magnetic resonance signals; and a reconstructor configured to form MR images from the signal samples, the controller being further configured to perform the acts of: generating a series of MR spin echo signals from a first nuclear spin species by subjecting at least a portion of the body to an MR imaging purse sequence comprising a spatially non-selective excitation RF pulse, a plurality of refocusing RF pulses, and a plurality of phase encoding switched magnetic field gradients; after each phase encoding gradient, applying a rewinding gradient to cancel an effect of the phase encoding gradient before application of a next refocusing RF pulse, wherein the rewinding gradient has equal strength as the phase encoding gradient and an opposite direction of the phase encoding gradient; acquiring the MR spin echo signals without application of frequency encoding magnetic field gradients and without application of slice selection magnetic field gradients; and reconstructing an MR image from the acquired MR spin echo signals.