Until now, CT scans in our and many other institutions are being performed with a fixed standard contrast dose specific for every protocol, independent of patient characteristics. However, many if not all patients would benefit from a contrast dose reduction, as long as image quality is not impaired. This is especially beneficial to patients with impaired renal function.~For this purpose, we researched previous literature as well as data from previously scanned patients with standard dose, to formulate a contrast dose calculation adapted to patient parameters.~An in-house calculator was developed to calculate the optimal contrast dose dependent on patient length, weight and heartrate.~A total of 60 CT-scans will be performed and retrospectively collected. Patients are randomly assigned to one of three groups : 1/ Standard dose of 120ml; 2/ Calculated dose (40-150ml) 3/ Calculated dose -50% (20-120ml). In case of reduced kidney function, patients were randomly divided between group 2 and 3 (reduced contrast dose).
An in-house calculator was developed to calculate the appropriate contrast dose, rather than standardly administering a 120ml dose. This study aims for a more uniform contrast enhancement in patients by means of adjusting (lowering) contrast dose to patient parameters.