Abstract #0076
Externally Calibrated Parallel Imaging in the Presence of Metallic Implants
Curtis N Wiens 1 , Nathan S Artz 1,2 , Hyungseok Jang 1 , Alan B McMillan 1 , and Scott B Reeder 1,3
1
Department of Radiology, University of
Wisconsin, Madison, Wisconsin, United States,
2
Department
of Radiological Sciences, St. Jude Children's Research
Hospital, Memphis, Tennessee, United States,
3
Department
of Medical Physics, University of Wisconsin, Madison,
Wisconsin, United States
3D multi-spectral imaging (3D-MSI) acquires multiple
acquisitions at different frequency offsets, in order to
excite signal over a wide range of off-resonance induced
by metallic implants. Self-calibrated parallel imaging
approaches can accelerate 3D-MSI techniques but a
substantial amount of time is required to acquire
calibration data for each offset. In this work we
developed a method for exter-nally calibrated parallel
imaging near metallic implants, and demonstrated
feasibility using a hip prosthesis phantom and a
volunteer with a cobalt/chromium/molybdenum alloy hip
head placed posterior to the knee. Comparisons to
self-calibrated parallel imaging showed significant
reductions in acquisition time, particularly for SR-FPE
with ~25% reductions in scan time.
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