Fig. 1
A 45-year-old female patient with stage IIIC (pT4aN2aM0) rectal cancer. a Choose a regional lymph node for post-processing. S (11.4 mm) and L (12.8 mm) are measured in the widest cross-section of this node, and S/L (0.89) is calculated. b A ROI is placed at the widest cross-section (green) on DWI map (b = 2000 s/mm2). c, d, e The ROI is copied to D map, D* map, and f map respectively (green), then IVIM-DWI parameters are estimated (D = 0.656 × 10−3 mm2/s, D* = 8.448 × 10− 3 mm2/s, f = 14.5%). f Metastatic adenocarcinoma is noted in this LN (red arrow) (hematoxylin-eosin stain, original magnification 40×)