This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
Which of the following is the classic CT appearance of an acute subdural hematoma – 
Select and explain. 
A. Lentiform–shaped hyperdense lesion, B. Cresent–shaped hypodense lesion, C. Cresent–shaped hyperdense lesion, D. Lentiform–shaped hypodense lesion
C: Cresent–shaped hyperdense lesion
Answer: C: Cresent–shaped hyperdense lesion 
Explanation: Subdural hematoma


Cresent (concavo-convex) shaped
Hyperdense (2/3) or mixed (1/3) in acute cases
Isodense in subacute
Hypodense in chronic