A "Contra-K 350 Injection" is a radiocontrast agent, specifically a "Contrapaque 350" injection, containing 350mg/ml of Iohexol, used in medical imaging procedures like CT scans to visualize internal structures, blood vessels, and other soft tissues by providing a clear picture during the scan, allowing doctors to diagnose abnormalities in organ shape and function; it is typically administered via injection and should be used under medical supervision