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Co-Zn ferrites as the MRI agents
- 1.0368961 - FZÚ 2012 CZ eng A - Abstract
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]
R&D Projects: GA ČR GAP204/10/0035
Institutional research plan: CEZ:AV0Z10100521; CEZ:AV0Z50390703
Keywords : magnetic nanoparticles * cobalt zinc ferrite * magnetic resonance imaging
Subject RIV: BM - Solid Matter Physics ; Magnetism
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).
Permanent Link: http://hdl.handle.net/11104/0203153
Number of the records: 1