Sukhoon Oh1, Yeun Chul Ryu1,
Zhangwei Wang2, Fraser Robb2, Christopher M. Collins1
Influence
of a receive array and failure of its detuning circuit on specific absorption
rate (SAR) is investigated with simulations and experiments at 3T. A simple
array of two copper loops was placed around an agar-gel phantom. A gap in the
circuit was placed and removed to simulate perfect and defective detuning
conditions, respectively. In simulations, addition of the decoupled array
resulted in only a 3% higher average SAR than with no array present, whereas
with the defective circuit, an increase of 41% was observed. Trends in
the SAR distributions between the different cases are similar in experiment
and calculation.