RT Journal Article
SR Electronic
T1 Optimal Metabolite Curve Fitting for Kinetic Modeling of <sup>11</sup>C-WAY-100635
JF Journal of Nuclear Medicine
JO J Nucl Med
FD Society of Nuclear Medicine
SP 926
OP 931
DO 10.2967/jnumed.106.038075
VO 48
IS 6
A1 Songmei Wu
A1 R. Todd Ogden
A1 J. John Mann
A1 Ramin V. Parsey
YR 2007
UL http://jnm.snmjournals.org/content/48/6/926.abstract
AB Many quantitative imaging protocols that make use of a metabolite-corrected arterial input function require the use of a mathematic model to describe the rate of metabolism of the radioligand. Commonly, parametric models are fit to metabolism data and then the fitted model is used to correct the plasma input function. 11C-WAY 100635 is a rapidly metabolized radioligand used extensively in mapping the 5-hydroxytryptamine receptor 1A system. Methods: To evaluate the adequacy of fit of 4 metabolite models, we examined data from 92 subjects who received an injection of 11C-WAY 100635, were imaged with PET, and underwent measurement of total plasma concentration and metabolites. The performance of these models was assessed according to residual plots, as well as fit and information criteria. Results: The study showed that the choice of model has a substantial effect on the resulting estimates of outcome measures. Conclusion: Among the models considered, the Hill model provides the best fit across all criteria.