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Fig. 15 | Insights into Imaging

Fig. 15

From: Thyroid nodule ultrasound: technical advances and future horizons

Fig. 15

Transverse SWE with B mode US images of two hyperplastic nodules (left, right) showing elastographic artefacts. The SWE elastogram chromatic scale ranges from blue to red, denoting soft to stiff (0 kPa to 180 kPa). The left image highlights stress concentration artefact in an isthmic nodule (white arrow), which occurs because the nodule produces a convex bulge of the skin and is compressed against the relatively hard trachea despite the use of an ample gel layer on the skin surface. The right image shows vertically aligned bands of light blue colour that traverse several anatomic structures (black arrows). These are suggestive of technology-related push pulse artefacts corresponding to peaks of shear waves induced at different lengths along the transducer. Although they can be excluded from SWE measurements, they may be inadvertently included if subtle

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