Peter Roland Seevinck1, Koen Lucas Vincken1, Gerrit Hendrik van de Maat1, Chris J.G. Bakker1
1Image Sciences Institute, Department of Radiology , University Medical Center, Utrecht, Netherlands
The signal decay time course of FID and SE of an aqueous suspension of strongly magnetized micron-sized spheres was investigated in great detail to explore the influence of volume fraction, field strength and diffusion. Excellent agreement between MR experiments, Monte Carlo simulations and both the theory of the static dephasing regime and the strong field behavior was demonstrated based on R2, R2 and R2* relaxation rates. This allows accurate prediction FID and SE signal behavior and quantification strongly magnetized spherical particles such as holmium- and iron-loaded microspheres and iron-labeled cells.