Two High-Dose CT Applications: Perfusion Imaging and Dual-Energy CT

Continuing development of some computed tomography (CT) applications offers promising clinical benefits. However, these applications also have the potential to deliver higher doses of ionizing radiation. Two such applications are perfusion imaging and dual-energy CT.

Perfusion scans monitor the flow of iodinated blood (contrast) through an organ by acquiring multiple scans of the same anatomical region for almost a minute. Perfusion imaging of the head, for example, is widely used to help diagnose stroke. Because the same area is scanned several times, the...