Figure 2.
Comparison of phantom T1 and T2 values with human data from the literature. Error bars are one standard error. The lines plotted for the study of Graham et al. (Ref. 52) indicate contours that include the calculated 12.5% and 87.5% probability of their measured tissues. The T1 and T2 values of the phantom materials fall within 2 standard errors of the human data for both the adipose- and the fibroglandular-mimicking compartments. Data points for the phantom materials were measured on three different phantoms constructed using different lard temperatures and stirring velocities. The phantom T1 values are a better match to human data than the T2 values and are the primary determinants of image contrast for DCE-MRI studies.