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Typical imaging findings in normal pressure hydrocephalus versus brain atrophy.

	Normal pressure hydrocephalus	Brain atrophy
Preferable projection	Coronal plane at the level of the posterior commissure of the brain.
Modality in this example	CT	MRI
CSF spaces over the convexity near the vertex (red ellipse)	Narrowed convexity ("tight convexity") as well as medial cisterns	Widened vertex (red arrow) and medial cisterns (green arrow)
Callosal angle (blue V)	Acute angle	Obtuse angle
Most likely cause of leucoaraiosis (periventricular signal alterations, blue arrows)	Transependymal cerebrospinal fluid diapedesis	Vascular encephalopathy, in this case suggested by unilateral occurrence