Optimizing Accuracy and Precision of Micro-coil Localization in Active MR Tracking under low SNR conditions
Barret Daniels 1 , Ronald Pratt 2 , Randy Giaquinto 1,2 , and Charles Dumoulin 1,2
Biomedical Engineering, Univsersity of
Cincinnati, Cincinnati, Ohio, United States,
Research Center, Cincinnati Children's Hospital Medical
Center, Cincinnati, Ohio, United States
MR active tracking suffers from less efficient signal
detection, poorer accuracy, and a complicated phase
sensitivity profile when MR signals detected by the
tracking coil arise only from regions outside of the
coil. Hadamard Multiplexing and Phase Field Dithering
have been proposed to improve tracking accuracy in these
low SNR conditions. We developed a strategy to further
increase MR tracking accuracy in these conditions by
improving upon the conventional max pixel approach to
MR tracking peak detection in the power spectrum.
Furthermore, we quantified the combined benefit in
accuracy and precision of all three methods through
electromagnetic simulation and experimentation.
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