Figure 7.

(a) Triple phase scanning employing MSCT. (b) Tri-phasic scanning in a patient with medullary thyroid carcinoma shows the focal metastases best seen in the late arterial phase (LAP). (c) Metastatic thyroid cancer. The lesion is best seen in the LAP but can be seen more subtly on the HAP and HVP phases. (d) Medullary thyroid carcinoma with multiphasic imaging. The lesions are best seen on both the HAP and LAP phases and much more poorly seen on the delayed HVP phase. (e) Hypervascular metastases from carcinoid. The very small sub-centimeter lesion is only identified on the HAP.