Figure 5.

Effect of decreased scan duration on total volume of distribution (V_T) estimated by the two-tissue compartment model (2TC) in bolus studies. Correlation between V_T estimated from (A) 180, (B) 120, (C) 90, or (D) 30 minutes of data and 360 minutes of data (n=4 subjects). Dotted line in each graph is line of identity. Correlation between V_T estimated from 60 minutes of data and 360 minutes of data is not shown but was similar to that for 90 minutes of data (V_T^60min=0.9824 × V_T^360min-0.4075, R²=0.9810).