Spectral-Spatial
Selectivity Using Spatiotemporal Encoding
Jean-Nicolas Dumez1,
Rita Schmidt1, Lucio Frydman1
1Department
of Chemical Physics, Weizmann Institute of Science, Rehovot, Israel
A mechanism based on spatiotemporal encoding is exploited
to add spectral selectivity to a pair of slice-selective frequency-swept
pulses. The SPEN-based SPSP selectivity is used for fat suppression in
spin-echo imaging. It does not require fast oscillating gradients and
provides high-quality slice profiles. It can also be used to acquire images
for two chemical species simultaneously. These concepts are illustrated with
phantom experiments at 7T. Examples of fat suppression and water/fat imaging
are also shown for breast imaging of human volunteers at 3T.
