title: Simplified mathematical description of longitudinal recovery in multiple-echo sequences.
abstract: The intensity of multiple echoes separated by a time 2 tau has been modeled using the closed form of a finite geometric series. This eliminates long exponential series, introduces the number of echoes as an independent parameter, and corrects for the net T1 relaxation during the echo train. Other sequences having echo trains can be modeled similarly.
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D008433:Mathematics