In this study, the length and area of t he artifact were quantitatively evaluated according to the direction of the magnetic susceptibility artifact. Using a self-made magnetic susceptibility artifact phantom the frequencyencoding direction in the 3.0T MRI system was changed in axial, coronal, and sagittal planes using T2 fast spin echo (FSE). The results showed a difference in length when the frequency encoding was changed from anteroposterior (AP) to right-to-left (RL) in the axial, RL to superior-inferior (SI) in coronal and AP to SI in sagittal planes (p < 0.05). In addition, the difference occurred when the magnetic susceptibility artifact area was measured according to the frequency-encoding direction conversion (p < 0.05). However, additional studies of magnetic susceptibility artifacts using various types of screws and plates are needed. This study provides basic data to prevent magnetic susceptibility artifact due to screw fixation.