Detection schematic of high- SQUID-based NMR/MRI system.
Sequences applied in the SQUID-detected NMR/MRI. Time dependence of (a) measuring field , (b) prepolarization field with , (c) gradient field , (d) 90° pulse and 180° pulse, and (e) FID and spin-echo signals.
(a) Spin-echo NMR signal for tape water fitted to Eq. (1), (b) as a function of concentration of Gd chelates, (c) as a function of concentration of Gd chelates, and (d) as a function of the magnetic susceptibility of Gd chelates.
(a) Intensity of FID NMR signal as a function of for different concentrations of Gd chelates, where is the time used to prepolarize the sample and (b) as a function of concentration of Gd chelates.
(a) Fourier spectrum for 10 ml cylindrical phantom with Gd chelates taken with different TE’s and (b) filtered MRI image for phantom shown in (a) taken with .
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