Resources

https://www.radiologyeducation.com (links to most of the major radiology websites and a lot of free resources)
eAnatomy is an excellent tool for understanding MRIs. It’s $30 a year (if you have a free membership, unclear which membership).
Radsource is another good resource.
http://radiologyassistant.nl/

CT

Nomenclature: use "intensity".
CSF is the easiest way to distinguish between T1 and T2. It is black in T1 and white in T2. Remember that 1 precedes 2 numerically in the same way that black naturally "precedes" white linguisticly (i.e. no one says "white and black" when referring to gray scale images)
Good overview article of MRI principles.
Nasal turbinates bright = MRI w/ contrast (per NSICU attending Vagnerova)

T1: pancreas (due to Mn2+ deposition in the pancreas), fat, protein, hemorrhage, melanin, and gadolinium.
T2: fluid (excluding blood)
DWI: bright areas are suspicious for infarcts, but can also be T2 shine-through. Dating the chronicity of infarcts can be done with T1 and T2.
ADC: dark areas on ADC are infarcts, and should correlate with bright areas on DWI.
GRE: In phase/Out of phase. Most sensitive for assessing iron deposits, steatosis.
T2-star:
FLAIR: heavily T2-weighted image which suppresses CSF