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a) The multiple-coil system includes two shielded coils. Each coil can be moved within its shield to adjust its offset to isocenter. b) Finite-element, three-dimensional radiofrequency simulation of our coil resonating at 300.5 MHz, loaded by a conductive mouse brain, and centered in our cubic shield. The software integrates the amount of power dissipated in the coil (54%), in the mouse brain (46%), and all the other electrical components including the shield (<0.1%).
