To analyze the impact of imaging modalities, a comparative study was conducted across multiple public hospitals in Bucharest, Romania. The focus was placed on four imaging techniques: native CT, contrast-enhanced CT, X-ray, and ultrasound. Data was collected from hospital reports, literature sources, and publicly available information from the National Health Insurance House (CNAS).

The study assessed several key parameters:

• Financial costs: Costs per procedure were analyzed based on publicly available hospital data and reimbursement rates provided by CNAS.
• Carbon dioxide (COâ‚‚) emissions: Estimated emissions for each imaging modality were derived from previously published studies on radiology energy consumption and environmental impact.
• Radiation exposure levels: The study reviewed literature on cumulative radiation doses associated with repeated imaging and their long-term health implications.

Data collection involved a combination of retrospective analysis of hospital records, consultation of international studies on imaging sustainability, and energy consumption reports specific to radiology departments. The carbon footprint of imaging modalities was estimated using established conversion factors for medical electricity consumption. Sensitivity analyses were conducted to account for variability in energy efficiency across different imaging devices and institutions.