Cadmium zinc telluride (CZT): the wonder material transforming medical imaging and beyond

Cadmium zinc telluride (CZT) is highlighted in recent reporting as a pivotal material enabling significant advances in medical imaging and other high-energy photon detection applications. At London’s Royal Brompton Hospital, CZT-enabled scanners have dramatically reduced the time patients spend in scanners—from about 45 minutes to roughly 15—by leveraging CZT’s high sensitivity and precise energy resolution to produce detailed 3D images of the lungs. The material, produced by UK-based Kromek, is one of only a few sources worldwide and has wide-ranging uses from medical imaging to X-ray telescopes and airport security scanners. The article explains that CZT detectors convert incoming gamma and X-ray photons directly into electronic signals, retaining crucial information like timing and energy, enabling richer, spectroscopic imaging. However, CZT is difficult to manufacture at scale, requiring complex crystal growth and processing. Beyond clinical use, researchers such as Henry Krawczynski and facilities like Diamond Light Source rely on CZT detectors for space physics experiments and high-brightness X-ray analyses. Production constraints and supply-demand tensions are noted, with universities and research labs seeking specific CZT detector configurations to suit diverse experiments. The piece also mentions possible near-term expansion into hand-luggage scanning and other security contexts as CZT adoption grows. Overall, CZT is presented as a relatively mature yet still hard-to-access material driving a broad spectrum of high-precision imaging technologies.