X-rays are used to diagnose and monitor a range of conditions in newborns. These include respiratory issues like Respiratory Distress Syndrome (RDS), congenital heart defects, gastrointestinal problems such as necrotizing enterocolitis (NEC), and skeletal abnormalities. The ability to visualize internal structures quickly and non-invasively makes X-rays a valuable tool in neonatal intensive care units (NICUs).