Fig. 2
From: Detection of parathyroid adenomas with multiphase 4DCT: towards a true four-dimensional technique
Axial images at the level of the thyroid at different time intervals. Scans at 0–20–22–24–26–28–30–32–34–36–38–40 s after administration of contrast, left to right from the top. Suspected parathyroid adenoma posterior from the left thyroid lobe in close relation to the common carotid artery (arrows). Note the lower enhancement on NECT (red arrow), higher enhancement compared with the thyroid in the arterial phase (white arrow) and the wash-out of contrast in the early venous phase (yellow arrow)