  Sequences based on the Distant Dipolar Field (DDF) have shown great promise
for novel spectroscopy and imaging. Unless spatial variation in the
longitudinal magnetization, M_{z}(s), is eliminated by relaxation, diffusion,
or spoiling techniques by the end of a single repetition, unexpected results
can be obtained due to spatial harmonics in the steady state M_{z}^{SS}(s)
profile. This is true even in a homogeneous single-component sample. We have
developed an analytical expression for the M_{z}^{SS}(s) profile that occurs in
DDF sequences when smearing by diffusion is negligible in the TR period. The
expression has been verified by directly imaging the M_{z}^{SS}(s) profile
after establishing the steady state. more keywords: magnetic resonance,
intermolecular multiple quantum coherence, mesoscale structure, iMQC, DDF
