Non-contrast CT
A small amount of high attenuation material within the dependent portion of the left circular sulcus likely represents a small amount of subarachnoid blood. No other intracranial hemorrhage was identified.
Hyperdensity seen within the suprasellar cistern corresponds to the large left terminal MCA aneurysm described below.
Bilateral periventricular and deep white matter hypoattenuation is likely in keeping with chronic small vessel ischemia. Large calcified pineal gland. Ventricles and sulcal pattern are age appropriate.
CTA
There is a large, lobulated, anteriorly directed aneurysm arising from the terminal left ICA, with a 3 mm neck. Further 2 mm aneurysm at the right M1 bifurcation.