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. Author manuscript; available in PMC: 2009 Dec 29.
Published in final edited form as: IEEE Trans Nucl Sci. 2009 Oct 1;56(5):2750–2758. doi: 10.1109/TNS.2009.2026417

Fig. 4.

Fig. 4

The triple tracer time-activity curve (top) is fit to the triple-tracer compartment model, producing parameterized time-activity curves for each individual tracer (middle). These single-tracer curves are used to predict relative activity values for each tracer at each time-point. These fractions are applied to the original triple-tracer curve to give the recovered single-tracer curves (bottom). The error bars shown on the top plot are the weights used for the multi-tracer compartment-model fit. The variations seen in the recovered FDG curve at 10 and 20 min., and in the PTSM curve at 20 min., are due to the use of fast temporal sampling at the times of injection of the other tracers.