Brian A. Hargreaves1, Garry
1Radiology, Stanford University,
Stanford, CA, United States; 2Electrical Engineering, Stanford
University, Stanford, CA, United States
Slice
encoding for metal artifact correction (SEMAC) excites 2D slices, then uses a
3D encoding to resolve the distortion of slices due to large metal-induced
susceptibility shifts. The addition of
a simple, fast spectral prescan easily estimates the extent of this
distortion, allowing the slab width and encoded field-of-view to be adapted
to the subject. This, allows the total
number of excited slices to be greatly reduced without diminishing final
image quality, thus offering a substantial reduction in SEMAC scan time.