Co-Zn ferrites as the MRI agents

0368961 - FZÚ 2012 CZ eng A - Abstrakt
Veverka, Miroslav - Veverka, Pavel - Knížek, Karel - Kořínková, T. - Burian, M. - Herynek, V. - Jendelová, Pavla - Pollert, Emil
Co-Zn ferrites as the MRI agents.
NANOCON 2011. Conference Proceedings. Ostrava: Tanger Ltd, 2011. s. 96. ISBN 978-80-87294-23-9.
[NANOCON 2011. International Conference /3./. 21.09.2011-23.09.2011, Brno]
Grant CEP: GA ČR GAP204/10/0035
Výzkumný záměr: CEZ:AV0Z10100521; CEZ:AV0Z50390703
Klíčová slova: magnetic nanoparticles * cobalt zinc ferrite * magnetic resonance imaging
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

In our research of suitable colloidal dispersion as the contrast agent for the magnetic resonance imaging (MRI) technique the cobalt-zinc-ferrite with the composition Co0.5Zn0.5Fe2O4+γ is investigated. The particles of the ferrite were prepared by a co-precipitation method followed by a thermal treatment in the range 500 – 600 °C to gain dimension variability of the sizes 10 – 40 nm. Particles of the ferrite were successfully covered by the silica shell with average width of the shell about 20 nm evidenced by TEM. The magnetic field dependence on relaxation rate T2 was carried out at fields 0.5, 1.5, 3 and 4.7 T, respectively, at room temperature. The dependence of relaxivity r2 on temperature was measured at the field B0 = 0.5 T (20 MHz).
Trvalý link: http://hdl.handle.net/11104/0203153