Fig. 4

DECT modality analysis of thyroid cancer metastasis to the lymph node. DECT scans show pathological tissue (ROI 2 - green), normal lymph node (ROI 1 - blue) and physiological muscle tissue (ROI 3 - red). Analysis on color maps depending on the concentration of the endogenous iodine. In pathological tissue, the concentration of accumulated iodine was 12.36 ± 4.47 × 100 µg / cm3, in muscle tissue it was 1.29 ± 1.81 µg / cm3, and in the normal lymph node was 0.27 ± 1.52 × 100 µg / cm3 A, B. X-ray absorption analysis by pathological tissue (green), muscle (red) and normal lymph node (blue) on graphs showing ionizing radiation absorption curves depending on the photon energy in the range of 40–140 keV in the range of 5 keV ​​C. Graphical representation of the distribution of dense measurements in ROI 1, ROI 2 and ROI 3 in the form of percentage distributions of pixels, one of the examples of the SPN analysis in the DECT modality