Optimizing pTILT perfusion imaging in the presence of off-resonance frequency

Abstract

Addressing the impact of off-resonance frequency on concatenated RF pulses, tagging efficiency can be effectively recovered in pTILT perfusion measurements. This strategy may be extended to other applications of concatenated RF pulses where sensitivity to magnetic field inhomogeneity prevents accurate quantification.

Regional perfusion imaging using pTILT

“…In addition to proper placement, the efficiency of pTILT was reported to be sensitive to magnetic field inhomogeneity artifacts (14,24,25). Recently, an acquisition method was proposed to sample a range of off-resonant frequencies to eliminate inaccuracies in perfusion estimates due to magnetic field inhomogeneities (26). Adaption of the off-resonant correction for concatenated RF pulse pairs may improve the signal level of the measured flow maps.…”