Acute MCA Infarct on CT
First image shows Acute Middle Cerebral Artery (MCA) Infarct. It is only seen as diminished size of the sulci, diminished grey-white matter differentiation, as well as reduced delineation of the putamen and external capsule - when compared with normal left side. Second image 19 hours later shows well defined large MCA infarct with clear swelling of the ischemic brain tissue.
Cases like this are a real challenge for radiologist.
You might also check my previous cases:
Acute MCA Infarct
Media Infarct - CT Perfusion