1Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan, 2Division of Health sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan, 3Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
Evidence that the
magnetic field distortion of an artificial knee joint and an Elgiloy rod in ppm
unit does not change at 0.4-T and 3.0-T MRI was demonstrated. The
susceptibility of Elgiloy and Ti alloy rods was derived from the magnetic
distortion maps and the value of Ti alloy rod especially agreed with the known
susceptibility of its material. The obtained value of the magnetic field
distortion is quantitatively reliable.
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