, 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.
Contrast material enhancement in the central nervous system (CNS) is a combination of two primary processes: intravascular (vascular) enhancement and interstitial (extravascular) enhancement (1,2). Intravascular enhancement may reflect neovascularity, vasodilatation or hyperemia, and shortened transit time or shunting.