Abstract #2824
Influence of Collimator Insertion on Eddy Currents for different Resistivities of Tungsten
Amine Samoudi 1 , Karen Van Audenhaege 2 , Gnter Vermeeren 1 , Michael Poole 3 , Roel Van Holen 2 , Luc Martens 1 , and Wout Joseph 1
1
INTEC, Ghent University/iMinds, Ghent,
Belgium,
2
ELIS,
Ghent University/iMinds, Ghent, Belgium,
3
INM-4,
Forschungszentrum Jlich GmbH, Jlich, Germany
This study investigates eddy currents in the collimator
due to gradient coils, for different resistivities of
tungsten materiel. The system is meant to be used for a
small animal SPECT/MRI. Two electromagnetic simulation
platforms, SEMCAD-X and FEKO, were employed for
simulating the gradient coils with the collimator.
Results showed that for higher values of resistivity,
lower current densities on the collimator are obtained
and thus lower eddy current effects, reducing deviations
from the expected values of the gradient. Characterizing
eddy currents and using an improved design of the
gradient should reduce the eddy current effect on the
collimator.
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