Field of View Reduction with RF Shield Mesh Sheet

Shin-ichi Urayama¹, Naozo Sugimoto, Takashi Azuma², Hidenao Fukuyama¹

Reduction of FOV is a key technique to shorten scan time or to decrease voxel size. Here, we introduced a RF shielding mesh sheet which is a net of nylon fiber covered with 99% silver and examined its usefulness (safety and shielding effectiveness) for FOV reduction on a 1.5T environment. Although no heating was occurred, only with balanced-SSFP, some volunteers felt tiny stimulation at their peripheral part because of large and rapid gradient switching. Signal intensity of arms covered with the mesh decreased to the noise level. By wrapping with insulated cloth, the mesh can reduce FOV effectively and safely.