Fig. 2From: Impact of ferumoxytol vs gadolinium on 4D flow cardiovascular magnetic resonance measurements in small children with congenital heart diseaseContrast-to-noise (CNR) analysis performed by assessing multiple regions of interest (ROI), including the maximum signal in the aorta, mean signal in the chest (pleural cavity), and two separate samples to assess the standard deviation of noise in air outside the thoracic cavityBack to article page