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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