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Schlagwörter:
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Zusammenfassung:
Due to high sensitivity to B1+-inhomogeneities, Chemical Exchange Saturation Transfer MRI requires a correction or mitigation of the B1+-inhomogeneity at ultra-high magnetic field strengths (B0 ≥ 7 Tesla). A novel approach for mitigation of B1+-inhomogeneity effects that affects the saturation process is presented. The method employs two interleaved excitation modes during the saturation pulse train. Simulations show a decrease of the relative difference of the MTRRex metric caused by B1+ inhomogeneity. This “Multiple Interleaved Mode Saturation” scheme leads to improved homogeneity in both, phantom and in vivo measurements at 7 Tesla.
