metab_gamma_model: Gamma Function for Parent Fraction

View source: R/kinfitr_pfmodels.R

metab_gamma_modelR Documentation

Gamma Function for Parent Fraction

Description

This is the model function for fitting of the integrated gamma function for the parent fraction.

Usage

metab_gamma_model(time, a, b, c, d, delay = 0)

Arguments

time

Time in seconds.

a

Parameter a. This parameter affects the ppf0 point.

b

Parameter b.

c

Shape parameter.

d

Rate parameter.

delay

The delay of the metabolism curve.

Value

Predicted values

References

Naganawa M, Jacobsen LK, Zheng MQ, Lin SF, Banerjee A, Byon W, Weinzimmer D, Tomasi G, Nabulsi N, Grimwood S, Badura LL. Evaluation of the agonist PET radioligand [11C] GR103545 to image kappa opioid receptor in humans: Kinetic model selection, test–retest reproducibility and receptor occupancy by the antagonist PF-04455242. Neuroimage. 2014 Oct 1;99:69-79.

Examples

metab_gamma_model(seq(0, 60 * 60, by = 120), 1.97, 708, 1, 0)

mathesong/kinfitr documentation built on Jan. 15, 2024, 11:07 p.m.