  The nuclear magnetic resonance signal from sodium (23Na) nuclei demonstrates
a fast bi-exponential T2 decay in biological tissues (T2,short = 0.5-5 ms and
T2,long = 10-30 ms). Hence, blurring observed in sodium images acquired with
center-out sequences is generally assumed to be dominated by signal attenuation
at higher k-space frequencies. Most of the studies in the field primarily focus
on the impact of readout duration on blurring but neglect the impact of
resolution. In this paper, we examine the blurring effect of short T2 on images
at different resolutions. A series of simulations, as well as phantom and in
vivo scans were performed at varying resolutions and readout durations in order
to evaluate progressive changes in image quality. We demonstrate that, given a
fixed readout duration, T2 decay produces distinct blurring effects at
different resolutions. Therefore, in addition to voxel size-dependent partial
volume effects, the choice of resolution adds additional T2-dependent blurring.
