Summary: Tailored RF Pulse Design
for 7T MRI
Aaron Christopher Hurley
Thesis submitted to
The University of Nottingham
for the degree of
Doctor of Philosophy
The primary concern of this thesis is in the design of RadioFrequency
(RF) Pulses to be used for Ultra-High Field Magnetic Resonance Imaging.
A movement towards higher magnetic field strength has noted advantages.
In particular, increased Signal to Noise Ratio (SNR) with increasing field
strength. However higher field strength also poses difficult problems, as a
result of increasing inhomogeneity in the main magnetic field (B0) as well
the Radiofrequency field (B1).
RF pulses were designed for use as inversion, refocusing and excitation
pulses. This was achieved by the use of Genetic Algorithms with an associ-
ated evaluation function. Such functions relate to the performance of pulses