VIENNA - What's a medical physicist's take on CT dose reduction? To find out, we asked Mats Danielsson, PhD, professor and head of the research group in medical imaging at the Royal Institute of Technology in Stockholm and director for the Center for Life Sciences Imaging at KTH-Karolinska. In an interview with AuntMinnieEurope.com Editor-in-Chief Philip Ward at ECR 2016, he also speaks about the Karolinska, following the recent case of alleged fraud.
Dr. Mats Danielsson on CT dose, plus alleged fraud at the Karolinska.Video produced by Christof. G. Pelz I GRAFIFANT Creation. Grafik. Photo I www.grafifant.at
![Axial images from unenhanced calcium score cardiac CT (left) and curved planar reformation images from CT angiography (right) show that higher long-term exposure to air pollution is associated with greater coronary artery calcium and more obstructive coronary artery disease (CAD). Top row: Images in a 68-year-old male patient with higher 10-year mean ambient air pollution exposure (7.9 μg/m3 for particulate matter measuring ≤2.5 μm in diameter [PM2.5] and 17.4 parts per billion [ppb] for NO2) with extensive CAD (coronary artery calcium score [CACS] >1,000 and obstructive CAD [≥70% diameter stenosis]). Bottom row: Images in a 57-year-old female patient with lower 10-year mean ambient air pollution exposure (6.3 μg/m3 for PM2.5 and 4.6 ppb for NO2) with no CAD (CACS = 0 and no obstructive stenosis).](https://img.auntminnie.com/mindful/smg/workspaces/default/uploads/2026/06/hanneman.r6SMLzkezo.png?auto=format%2Ccompress&dpr=2&fit=crop&h=167&q=70&w=250)
