A recent study from DEI investigated the potential of virtual non-contrast (VNC) imaging derived from dual-energy CT for the characterization of adrenal lesions. The study has been published in La radiologia medica.
The study included 439 patients with adrenal lesions and compared the diagnostic performance of conventional true non-contrast (TNC) CT with VNC images reconstructed from contrast-enhanced dual-energy CT datasets.
The results demonstrated comparable diagnostic accuracy of VNC and TNC imaging for differentiating adrenal adenomas from metastases. Diagnostic performance was excellent for both approaches, with AUC values of 0.923 for TNC and 0.928 for VNC, without a significant difference between the two techniques. Importantly, replacing a separate unenhanced CT acquisition with VNC reconstructions could reduce radiation exposure by up to 39%. In addition to dose reduction, eliminating the true non-contrast phase may streamline CT workflows and reduce scanner time and data storage requirements.
These findings highlight the potential of spectral CT imaging to extract additional diagnostic information from existing datasets and support the development of more efficient, dose-optimized, and patient-centered CT protocols.