inexp, vol = v0 * (1 + kappa * t / tempt) * exp(-t / tempt):</code>Recommended for gastric emptying curves with an initial volume overshoot from secretion. With parameter kappa &gt; 1, there is a maximum after t=0. When all emptying curves start with a steep drop, this model can be difficult to fit.</li>
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<code>powexp, vol = v0 * exp(-(t / tempt) ^ beta):</code> The power exponential function introduced by Elashof et. al. to fit scintigraphic emptying data; this type of data does not have an initial ov