Fig. 5

PET transaxial images (a, b, the colour scales are the same), histograms of the heterogeneity contributions (the mean intensity deviation per distance calculated according to Eq. 2) (c, d) and surface plots (e, f) of the uptake of [¹⁸F]FDG and ¹¹C-labelled AnxA5 in a FaDu xenograft. The imaging was performed in the same animal >2 h apart on the same day. In e and f, the X- and Y-axes represent spatial dimensions and the Z-axis is the tracer uptake in SUV_mean