The Revolutionary Material: Unlocking Medical Imaging and Beyond
Imagine lying still in a hospital scanner for 45 minutes, just for a lung scan. Not exactly a relaxing experience, right? But thanks to a groundbreaking material called cadmium zinc telluride (CZT), this procedure has been transformed. CZT, a semiconductor with remarkable properties, is enabling a revolution in medical imaging, making it faster, more detailed, and less invasive.
This wonder material, crafted by the British company Kromek, is one of the few in the world capable of producing CZT. It's not just medical imaging that benefits; CZT is also used in X-ray telescopes, radiation detectors, and airport security scanners. Its versatility and precision are truly remarkable.
Dr Kshama Wechalekar, head of nuclear medicine and PET at Royal Brompton Hospital, praises the technology: "You get beautiful pictures from this scanner. It's an amazing feat of engineering and physics."
The CZT in the hospital's new scanner, installed last August, allows for highly detailed, 3D images of patients' lungs. This technology reduces examination times from 45 minutes to just 15 minutes, making it more comfortable for patients and more efficient for healthcare professionals.
But CZT's impact goes beyond medical imaging. It's also used in airport security scanners and explosives detection. Dr Arnab Basu, founding chief executive of Kromek, explains the manufacturing process: "It has taken a long time for it to develop into an industrial-scale production process." The process involves heating a special powder in small furnaces, turning it molten, and then solidifying it into a single-crystal structure, a process that takes weeks.
The precision of CZT is unparalleled. It can detect tiny photon particles in X-rays and gamma rays with incredible accuracy, similar to a specialized version of the light-sensing image sensor in your smartphone camera. This enables the creation of detailed images, retaining important information like timing and X-ray energy.
Despite its versatility, CZT is not always readily available. Professor Henric Krawczynski at Washington University in St Louis, US, has used CZT in space telescopes, but finding thin, 0.8mm pieces of CZT is a challenge. Kromek's high demand and specialized production process make it difficult to meet all research needs.
However, CZT's impact extends beyond medical and security applications. The Diamond Light Source research facility in Oxfordshire is undergoing a major upgrade, costing half a billion pounds, to improve its capabilities with CZT-based detectors. This upgrade will enhance the facility's ability to analyze materials, making it a powerful tool for scientific research.
In conclusion, CZT is a revolutionary material with a wide range of applications. Its precision, versatility, and impact on various fields make it a game-changer. As Kromek continues to develop and supply CZT, we can expect further advancements in medical imaging, security, and scientific research.
