Figure 4. CT segmentation corresponds with histology.

(a–c) Histology and (d–f) corresponding segmented CT slices for tumors of diameters 45 mm³, 113 mm³, and 254 mm³, respectively. (g) The tumor area in histology is correlated with the cross-sectional area of protein-rich tissue detected by CT (r² = 0.92, slope = 1.2). (h) The average HU of 1 mm² ROIs in the fat pad is less than within the tumor when averaged across all tumors (p<0.05). (i) The CT number is higher within the tumor compared to the surrounding fat pad for all tumors.