Screening (image) Radiological Society of North America Caption This shows two-view screening mammograms obtained with the DR photon-counting system show a spiculated mass in the right upper quadrants (arrow). The diagnosis was invasive ductal carcinoma, 8 mm in diameter, as seen on the (a) right craniocaudal image, (b) right mediolateral oblique image, and (c) zoomed in craniocaudal image of the lesion. Credit Radiological Society of North America Usage Restrictions May use with credit Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.