The duration of continuous scanning at a specific power deposition, such as 2 W/kg, reflects the safe exposure limits defined by safety guidelines and regulations pertinent to MRI environments. For patients with normal thermal regulation, the appropriate duration for scanning without exceeding safety thresholds is essential to prevent any thermal injury or adverse effects due to heating of body tissue.
In this case, the 50-minute limit corresponds with the standards established for specific absorption rates (SAR) and thermal regulation in MRI. This guideline takes into account the ability of the human body to dissipate heat effectively while being exposed to a consistent energy deposition rate, ensuring that the patient does not experience overheating during the procedure.
Maintaining awareness of thermal effects is crucial because the human body's ability to regulate temperature can vary, and prolonged exposure to energy deposition can lead to potential risks if not properly monitored. Thus, a duration of 50 minutes for continuous scanning at 2 W/kg sets a benchmark that aligns with established safety practices in MRI to maximize patient safety while achieving the necessary diagnostic results.