for Biomedical Engineering, , University and ETH Zurich, Zurich, Switzerland;
2Institute for Biomedical Engineering, University and ETH Zurich,
Zurich, Switzerland; 3Skope Magnetic Resonance Technologies,
The observation of longitudinal nuclear magnetization with NMR field probes is a fast and sensitive method for the characterization of T1-relaxation times. Changes in the properties of the NMR field probes and geometrical considerations lead to an increase in sensitivity of a factor of ten. A field measurement resolution of 50 pT was reached, enabling robust and precise fitting of signals acquired in single shot experiments.