Improvement of Quantitative MRI Using Radial GRAPPA in Conjunction with IR-TrueFISP

Martin Kunth¹, Nicole Seiberlich², Philipp Ehses¹, Vikas Gulani², Mark Griswold²

While the use of IR-TrueFISP to quantify the relaxation parameters T1 and T2 and the proton density M0 has been demonstrated, these values can be difficult to quantify in species with fast relaxation because the first points along the relaxation curve are hard to assess. This abstract explores the use of the recently proposed technique through-time radial GRAPPA to reconstruct highly undersampled radial images acquired along the relaxation curve. In this way, the first few points after the inversion can be assessed and the relaxation parameters more accurately quantified.