, Aspiring pilot, Alaskan. 1  Well, if you want to be a USAF drone pilot, the process is 5+ years, and relatively difficult, the most difficult section being the flight training itself. Manned flight school has a ~30% washout rate, so I assume the drone program is similar.
A bottle of Omniscan contrast agent. MRI contrast agents are a group of contrast media used to improve the visibility of internal body structures in magnetic resonance imaging (MRI). The most commonly used compounds for contrast enhancement are gadolinium-based.
The first commercial contrast agents were developed by sonication of 5% human albumin solution and became commercially available in Europe in 1991 first as Echovist (Berlex, Lachine, QuebecCity, Canada). In 1996, Levovist appeared on the market (Bayer Shering, Berlin Germany).