Fig. 14

Transverse and longitudinal SWE with B mode US images of a papillary carcinoma (left) and a hyperplastic nodule (right) respectively. The SWE elastogram chromatic scale ranges from blue to red, denoting soft to stiff (0 kPa to 180 kPa). The cancer appears uniformly soft with a maximum SWE stiffness of 33.6 kPa whereas the hyperplastic nodule appears heterogeneously stiff with a maximum SWE stiffness of 84.0 kPa. These would be false negative and false positive for malignancy respectively using any recently published SWE cutoff (cutoffs range between 39.3–66 kPa)