Peter Kellman1,
Daniel A. Herzka2, Andrew E. Arai1, Michael Schacht
Hansen3
1NHLBI,
NIH, Bethesda, MD, United States; 2Biomedical Engineering, Johns
Hopkins University, Baltimore, MD, United States; 3NHLBI, National
Institutes of Health, Bethesda, MD, United States
The frequency dependence of SSFP imaging is well known and results in dark band artifacts. Myocardial T1-mapping methods such as MOLLI use single shot SSFP readout and are prone to error in T1-measurement that is frequency dependent. A low excitation flip angle is used in MOLLI to reduce errors that result from influence of readout and improve T1-measurement accuracy. It may be less well appreciated that an additional significant frequency-dependent error in T1 results at relatively small off-resonance frequency deviations that are typically observed in the SSFP passband.