, 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.
A thallium scan may also be used to measure tumor response. X-ray Imaging Agents: X-ray imaging agents (contrast agents) work with x-ray and CT imaging by increasing the density of tissues (and thus blocking x-ray transmission). They can be administered by mouth, enema, or injection.