Dual-Energy CT

Dual-energy CT is an advanced form of computed tomography that scans the body at two different X-ray energy levels at the same time. A standard CT uses a single energy and shows mainly the shape and density of tissues, but by comparing how structures behave at two energies, dual-energy CT can tell different materials apart far more precisely. This added information helps doctors characterise what they see, such as distinguishing one type of tissue or deposit from another, and it can often be achieved with less contrast agent and a lower radiation dose. It uses X-rays, as all CT does, but with techniques designed to keep exposure low.