Method for the operation of a nuclear magnetic resonance apparatus for the fast identification of the longitudinal relaxation time T.sub.1

A method for operating a nuclear magnetic resonance apparatus in which an examination subject is disposed comprising the steps of:

• generating a fundamental magnetic field in which said examination subject is disposed;
• exciting a spin system in said examination subject by a sequence of RF pulses for generating nuclear magnetic resonance signals and measuring said nuclear magnetic resonance signals, said sequence of RF pulses being formed by a plurality of partial read pulses having respective flip angles of less than 90.degree., with a chronological spacing between successive partial read pulses being less that the longitudinal relaxation time of said spin system, and one pulse preceding said partial read pulses for placing said spin system in a selected start magnetization condition and;
• reading out the nuclear magnetic resonance signal after every partial read pulse.