As a radiologist in a tertiary care centre operating CT scanners from four different manufacturers of various generations and age (0-20 years) I can assure you

As a radiologist in a tertiary care centre operating CT scanners from four different manufacturers of various generations and age (0-20 years) I can assure you that there is no current CT protocol that requires minutes of active scanning time. Even if you are using bolus tracking and a multiphase acquisition your actual scanning time will be far less than a minute. We know in our centre the average patient time on the scanner is 10 minutes and we book patients every 15 minutes.