@hnrharrison I'm not a medical professional however from everything you have shared I understand why you want to know if your husband's symptoms are associated with the findings on the scanning results. With these most recent findings that you shared on the CTA and MRA that were done last month detailing the probable occlusion with the left hemisphere MCA (middle cerebral artery) and changes within the territory around the ACA (anterior communicating artery) would result in me asking the same questions as you. Can occlusions look like lesions in brain scans? I'm thinking that since a CTA and MRA were ordered that the physician who ordered these wanted to find. out more about your husband's arteries and blood vessels in the brain.

A narrowing, or occlusion (stoppage) of the blood vessels in the brain can result in what we often think of as strokes. When the brain tissue is affected by those changes in the brain blood vessels then that brain tissue is what is referred to as a lesion that shows up on brain scans.

Computed Tomography Angiography (CTA) from Johns Hopkins University:

-- https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/computed-tomography-angiography-cta

Magnetic Resonance Angiography (MRA) from Cleveland Clinic:

-- https://my.clevelandclinic.org/health/diagnostics/24024-mra

I don't have personal experience with this. If this were occurring with my husband I'd be advocating for him just as you are doing.

If you and your husband are interested in a second opinion/consult with Mayo Clinic then here is the information you will need to request an appointment. Your husband can refer himself or better yet your husband's physician can make the referral with the supporting scans and medical documentation.
http://mayocl.in/1mtmR63