4D Parathyroid CT Using Photon-Counting Detector CT.

4D parathyroid CT is a multiphase protocol used in the setting of hyperparathyroidism to detect parathyroid adenomas, largely identified by their density patterns relative to the thyroid and enlarged nonlymphoid soft tissue in the central compartment. This technique has previously been described using traditional energy-integrating detector CT. We present our protocol using photon-counting detector CT as a means of using increased spatial and contrast resolution to help identify parathyroid adenomas.