Ultra-low dose CT scanning in clinical practice? A preliminary study in 30 patients

Tuesday 11 September Proffered papers 3: Dose managment - Presenting Author: Dr Varut VardhanabhutiPURPOSE: To compare image quality of ultra-low dose CT scans acquired with 3 different CT reconstruction algorithms. METHODS AND MATERIALS: 30 patients who underwent standard of care CT chest/abdomen/pelvis were in addition scanned at 2 pre-selected ultra-low dose scans (noise index of 60 and 70) with images reconstructed using filtered-back projection (FBP), adaptive statistical iterative reconstruction (ASIR) and novel model-based iterative reconstruction (MBIR). Objective and subjective image qualities were compared. Doses for each scans were recorded. Mean image noise and attenuation values were compared between different reconstruction algorithms using ANOVA with Dunnett's post-testing. RESULTS: Objective image analysis supports significant noise reduction with low dose scans using MBIR technique (p