High-Pitch Computed Tomography Coronary Angiography – A New Dose Saving Algorithm: Estimation of Radiation Exposure

Purpose: To estimate effective dose and organ equivalent doses of prospective ECG-triggered high pitch CTCA. Materials and Methods: For dose measurements, an Alderson-Rando-phantom equipped with thermoluminescent dosimeters was used. The effective dose was calculated according to ICRP 103. Exposure was performed on a second-generation dual-source scanner (SOMATOM Definition Flash, Siemens Medical Solutions, Germany). Following scan parameters were used: 320mAs per rotation, 100 and 120kV, pitch 3.4 for prospectively ECG-triggered high pitch CTCA, scan range of 13.5cm, collimation 64×2 x 0.6mm with z-flying focal…