Abnormal signal and diffusion restriction are involving the left hippocampus and posterior limb of left internal capsuleain keeping with "acute infarction along the left anterior choroidal artery distribution".
Loss of signal void of the intracranial portion (namely its petrous, cavernous and supraclinoid segments) of the left internal carotid artery (likely occluded).
Small artery disease.
Brain atrophic changes.