Abstract: A magnetic resonance imaging method of fast contemporaneous aquisition of differently weighted plural images using sequences having cycles composed of a plurality of different sub-cycles or modes which interact to produce a steady state free precession spin ensemble. Each sub-cycle has an rf excitation pulse and gradient magnetic field variations in orthogonal directions. For each sub-cycle, the excitation pulse flip angle, the sub-cycle duration, and the vector gradient integral over the sub-cycle is the same in each cycle. The sub-cycles differ from each other in at least one of pulse angle, duration and gradient integral. The gradient waveforms are chosen so that the steady state free precession spin ensemble, when represented in k-space, has spaced-apart differently weighted image transform lobes, a plurality of which are scanned by k-space excursions in each sub-cycle exciting gradient echo signals which may be separately collected for each image transform lobe of interest.

Abstract: A method for the determination of the spatial and of the spectral distribution of the nuclear magnetization in a region under investigation. Following a high-frequency excitation pulse, a magnetic gradient field periodically varying its polarity is actuated. The resolution is increased in that, even during the periods of time in which the gradient of this field varies, scanning values are recorded and subjected to a Fourier transformation.