Fig. 2
Tumor segmentation and peritumoral expansion of two representative examples on BMUS, SE and SWE images. The ROItumor represents the intratumoral region. The ROI0.5 mm, ROI1.0 mm, ROI1.5 mm and ROI2.0 mm represent the combined region including both the intratumoral and peritumoral areas with 0.5–2.0 mm widths. (a) A 39-year-old female without cervical LNM; (b) A 50-year-old female with cervical LNM. BMUS: B-mode ultrasound; LNM: lymph node metastasis; ROI: region of interest; SE: strain elastography; SWE: shear wave elastography