Venous infarcts/hemorrhages 

General principles: 
- Venous thrombus leads to increased back pressure, which first manifests as increased vasogenic edema, and then as the process evolves to infarction, cytotoxic edema
-Arterial thrombus only leads to cytotoxic edema
- Venous infarcts are often midline, while arterial are typically unilateral
- Infarct/bleed/edema in temporal lobe or b/l thalamus: think venous (see below for image of distributions).
- Posterior temporal lobe pathology only => Labbe
- Arterial infarct/bleed will follow arterial distributions

Distributions of venous infarct/hemorrhage: 

{image source: radiologyassistant.nl}

Venous drainage patterns:

{image source: radiologyassistant.nl}

Reminder of venous anatomy:

Labbe: 

infarct

bleed

cytotoxic & vasogenic edema

{image source: radiologyassistant.nl}

Deep veins (i.e. galen/straight sinus, etc) :

L thalamus and R BG flair signal

bilateral BG flair signal

{image source: radiologyassistant.nl}