Changes in sensitivity with stimulation strength and scan parameters.

<p>Mean SNR of the peak produced by 25-Hz stimulation was evaluated at varying strengths (ΔB(t) = 0.5, 1, 5, 10 nT) (<b>a</b>) and at varying numbers of dynamic images from 1000 to 5000 with ΔB(t) = 1 nT (<b>b</b>). <b>c</b>: Multi-TE experiment. Various stimulation frequencies (= 25, 30, and 35 Hz) were tested at TE values ranging from 20 to 55 ms with a step of 5 ms.