Abstract #2322

Distributed T2 relaxation model for polydisperse nanoparticle systems

Bashar Issa¹

¹Physics, UAE University, Al-Ain, United Arab Emirates

Theories describing 1/T2 enhancement due to the presence of superparamagnetic particles agree well with experimental and Monte Carlo (MC) simulation data under the condition that the particles are monodisperse both in size and magnetization. We present a 1/T2 distributed model that takes into account the particle size and magnetization distributions. We average the individual 1/T2 components exhibited by each group of particle with a uniform particle size. MC simulations of the model successfully predict 1/T2 within the MAR regime confirming the implicit assumption that the spins are able to sample all the particles’ radii and magnetizations within the echo time.

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