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. Author manuscript; available in PMC: 2009 Jun 8.
Published in final edited form as: Magn Reson Med. 2008 May;59(5):1072–1078. doi: 10.1002/mrm.21540

Figure 6.

Figure 6

Results obtained from a spherical agar phantom using a standard birdcage head coil at 3T. In-plane image obtained with a GRE sequence using (A) a STABLE pulse and (B) a Hamming-windowed sinc pulse for excitation. Acquisition parameters were: TE/TR=14.2/500 ms, slice thickness=5 mm and matrix size=256×256. Chosen horizontal cross sections of several such images obtained with (C) the STABLE pulse and (D) the sinc pulse scaled to a range of peak B1 values. The cross-section obtained with a sinc excitation pulse varies significantly as the B1 is scaled, 20 while the cross-section obtained with the STABLE pulse stays largely invariant after adiabatic threshold is reached. Mesh plots, (E and F) showing all cross sections obtained vs. peak B1 for the STABLE and conventional sinc pulse respectively.