The purpose of this study is to compensate for susceptibility and a ferromagnetic body artifact using CFA and TGV on MR Imaging. A total of 30 patients (15 men and 15 women, mean age: 45 years) were performed on head and neck diseases. MR Unit used a 1.5T superconducting magnet (GE medical system, High Density). This study have investigated by changing with CFA and TGV (70, 90, 110, 130, 150) searching for compensation values about susceptibility and a ferromagnetic body artifact in 60 kg standards of body weight (p＜0.05). As a quality results, Image qualities were obtained at different score from CFA and TGV (70, 90, 110, 130, 150=3.23±0.35, 4.31±0.02 4.23±0.21, 5.12±0.25, 7.13±0.72, 8.31±0.01, 5.21±0.15, 6.14±0.08, 5.23±0.72, 5.91±0.06, p＜0.05). Absolute CNRs (TG, CNRpre, CNRpost) were acquired with (70:−1.44±0.11, −2.7±0.04, 90:−2.18±0.42, −4.41±0.43, 110:−2.89±0.43, −5.23±0.02, 130:−2.34±0.05, −5.26±0.01, 150: −2.09±0.08, −3.87±0.12, p＜0.05). In conclusions, this study could be compensated for metal and flow artifacts surrounding the tissues having artifact by changing CFA and TGV.

KeywordsTransmission gain values, Center frequency adjustment, Artifacts, Absolute contrast to noise ratio