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Contrast¡¡in MRI  is governed by Longituadinal and transverse relaxation time of water protons.
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ÁíÍ⣬Õâ¾ä»°¸ÃÔõô½âÊÍ£º a particle coating in order to gain monodispersibility in water, retention of water molecules in proximity of the paramagnetic core giving a high relaxivity and toxicity reduction.

[ Last edited by americanyk on 2010-11-11 at 16:12 ]
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