Correction of Slice Profile Distortion from Metallic Devices
Butts Pauly K, Gold G
Metallic devices remain a source of image artifacts in MRI. In-plane shifts can be eliminated with view angle titlting, and the resulting images reveal the underlying slice profile distortions. These arise from both potato chipping of the slice and intensity modulations from variations in slice thickness. The purpose of this work was to use a thin slice VAT sequence with two averages, the second offset from the spin echo by 60 microseconds, to obtain a field map. This is then used to correct for slice profile distortions.