Abstract #2311
Metal artifact reduction using MAVRIC in the presence of common orthodontic appliances
Jeff A. Kohlmeier 1 , Heidi A. Edmonson 2 , Joel P. Felmlee 2 , David W. Stanley 3 , Fred J. Regennitter 1 , and John E. Volz 1
1
Department of Orthodontics, Mayo Clinic,
Rochester, MN, United States,
2
Department
of Radiology, Mayo Clinic, Rochester, MN, United States,
3
GE
Healthcare, Rochester, MN, United States
Orthodontic appliances are well known to produce
artifact and geometric distortion in MR imaging of the
head and neck. The goal of this study was the quantify
the extent of susceptibility artifact induced by common
orthodontic appliances and to evaluate the utility of
MAVRIC for imaging near the appliances. Various
appliances configurations were imaged on an
anthropomorphic phantom utilizing T2FSE, T1 Cube, T1
MAVRIC and SL MAVRIC sequences. Our results show a large
reduction in signal void when comparing MAVRIC to both
T2 FSE and T1 Cube sequences for all appliances (51% and
83% reduction respectively). These results suggest that
MAVRIC could decrease the frequency of appliance removal
for MR imaging and could be used as a problem solving
sequence for tissues near the appliance.
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