(1) Arterial
(2) Venous
(3) Vasculitic—including specific patterns
(4) Hypoxic-anoxic encephalopathy
(5) Vasculitis
(6) Posterior reversible encephalopathy syndrome
(7) Vascular occlusive disease
Image Perception
Q: What optical illusion should one be mindful of when assessing whether an infarct is hemorrhagic?
A: Simultaneous contrast will make a focus of intermediate attenuation surrounded by low attenuation seem denser, causing you to diagnose hemorrhage when it is just preserved gray matter.
Reference:
http://web.mit.edu/persci/gaz/gaz-teaching/flash/contrast-movie.swf
more optical illusions