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Abstract #3196

Relaxation Time Calculations using an Inversion-Recovery Steady-State Free-Precession (IR-SSFP) Sequence A Comparison of Single and Dual Acquisition Methods

Richard Stephen Nicholas 1,2 , Stephen J Gandy 1,2 , and Richard A Lerski 1,2

1 Medical Physics, NHS Tayside, Dundee, Scotland, United Kingdom, 2 University of Dundee, Dundee, Scotland, United Kingdom

This study compares a single and dual acquisition method for simultaneously measuring T1 and T2 in phantoms using an IR SSFP sequence. Measurements were made over a combination of RR intervals and flip angles, and compared with calibrated reference values. For the single acquisition method, significant deviations in both T1 and T2 were observed, particularly at shorter RR intervals with longer T1 phantoms. The dual acquisition method was demonstrated to be superior for measuring T1 but over-estimated T2. The increased accuracy may offset the requirement for a second acquisition, but this would need further evaluation in vivo.

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