https://www.selleckchem.com/products/unc1999.html Neonatal ductus arteriosus aneurysm (DAA) is a rare abnormality that is typically diagnosed at fetal third trimester or early postnatal echocardiography. While echocardiography is usually adequate for diagnosis and clinical decision-making, cross-sectional imaging, including CT or cardiac MRI, may be necessary to clarify the diagnosis or delineate associated complications. Severe complications include thromboembolism, infection, compression of adjacent structures, airway erosion, and aneurysm rupture. This imaging essay reviews the pathophysiology and depicts the spectrum of cross-sectional imaging appearances of neonatal DAAs. Most neonatal DAAs will spontaneously regress and can be managed conservatively. Keywords CT, MRI, Cardiac, Aneurysms, Congenital Supplemental material is available for this article. ©RSNA, 2021. To perform a retrospective review of Coronary Artery Disease Reporting and Data System (CAD-RADS) adoption at a high-volume cardiac CT service. In this retrospective study, the adoption of CAD-RADS in 6562 coronary CT angiography (CTA) reports from January 1, 2017, to February 13, 2020, was evaluated. Reports without CAD-RADS were classified as opt-outs or exceptions to CAD-RADS. CAD-RADS classifications were retrospectively assigned to the opt-outs and the clinical indications for coronary CTA. CAD-RADS scores were reported in 95% (6264 of 6562) of cases. Among the 5% ( = 298) of reports not reported according to CAD-RADS, 58% ( = 172) were considered opt-outs and 42% ( = 126) were exceptions. Cases with higher degree of stenosis, stents, and coronary artery bypass grafts (CABGs) occurred more often in opt-outs versus reports with CAD-RADS (odds ratio [OR], 8.3 [95% CI 1.6, 42.1]; < .001). The quarterly opt-out rate decreased over consecutive quarters in the 1st year (OR, 0.77 [95% CI 0.61, 0.96]; = .01), then stabilized. Quarterly opt-out rate for patients with stents decreased over time (OR, 0.82 [