Figure 3.

Sampling bandwidth and B₀ artifact. B₀ field sensitivity depends on the time duration of the MR signal sampling. The longer the duration of sampling, the more time is allowed for the magnetization to evolve. In the presence of B₀ inhomogeneities caused by the static field, by tissue susceptibility, or even by chemical shift, a “low” sampling bandwidth will produce greater artifacts than a “high” sampling bandwidth. On the other hand, low bandwidth sampling will have less noise and a better signal-to-noise ratio (SNR).