Method and apparatus for determining the fat content

A low-resolution NMR pulse spectrometer comprising an apparatus for generating a magnetic field, an apparatus for generating RF transmission pulses, an apparatus for receiving NMR signals, an apparatus for generating a magnetic gradient field and a computer for driving said apparatuses, wherein said computer is programmed for carrying out and said apparatuses are configured for carrying out a method for determining the content of a first component of a sample with the aid of a low-resolution nuclear magnetic resonance (NMR) pulse spectrometer,

• said first component having a first self-diffusion coefficient D1 and providing a first NMR signal, said sample additionally containing at least one further component having a further self-diffusion coefficient D2 larger than said first self-diffusion coefficient D1 and providing a further NMR signal,
• comprising the steps of:
• exciting said sample by a radio frequency (RF) excitation pulse exposing said sample to a magnetic gradient field and exposing said sample to a sequence of further re-focusing RF pulses for generating spin echo signals, wherein said magnetic gradient field is not switched-off during said sequence of further re-focusing RF pulses,
• detecting said spin echo signals and determining amplitude values of said spin echo signals, and
• determining a value for said content of said first component of said sample from said amplitude values of said spin echo signals.