 Other approaches
are possible like the resonance spin echo, NRSE with concentrated a DC field and a RF field in the flippers at the end of
preparation and decoding zones which then are without magnetic field (zero field).In principle these approaches are equivalent concerning
the connection of the final intensity signal with the intermediate scattering function.Due to technical difficulties until now they have not
reached the same level of performance than the generic (IN11) NSE types.