Performance study of aluminum shielded room for ultra-low-field magnetic resonance imaging based on SQUID: Simulations and experiments

Li Bo^{1, 2, 3}, Dong Hui^{2, 3}, Huang Xiao-Lei^{2, 3, 4}, Qiu Yang^{1, 2, 3}, Tao Quan^{2, 3}, Zhu Jian-Ming^{1, †}

(color online) (a) Shielding effectiveness as a function of frequency with coil B 2.25 m away from the sample position for theoretical calculation (black square), the simulation without (red circle) and with a 0.5-mm gap (blue triangle), and the measured results (pink inverted triangle). (b) Shielding effectiveness at 5.5 kHz for different distances.