Dual-energy CT scan

The dual-energy CT scanner, also known as spectral computed tomography, represents a major advance in the field of medical imaging. This innovative technology simultaneously uses two different X-ray energy levels, allowing spectral analysis of the tissues being imaged. This approach offers diagnostic capabilities considerably superior to those of conventional single-energy CT. The principle of dual-energy CT is based on the fact that the different tissues and materials in the human body absorb X-rays differently depending on their energy level. By combining the information obtained at two distinct energies, the scanner can differentiate structures that appear identical on a conventional CT scan: for example, distinguishing a urate stone from a calcium oxalate stone, identifying the composition of an atheromatous plaque, or differentiating a recent hematoma from an old one. This technology also makes it possible to significantly reduce metal artifacts related to prostheses, to improve the visualization of tumor contrast enhancement, to create virtual maps without injection and to reduce the radiation dose delivered to the patient. Dual-energy CT is particularly effective in oncology, urology, cardiology and vascular disease. At Clinique Pasteur in Tunis, dual-energy CT is performed on a latest-generation machine offering exceptional spatial and temporal resolution. The team of expert radiologists makes full use of the capabilities of this technology to provide accurate and rapid diagnoses, with constant attention to patient radiation protection.