Sorry but aneurisms aren’t my area of expertise, nor are CT scans unfortunately, which highlight the bone really. Also, the contrast between the different soft tissue elements on a CT scan, is not as keen as it is on an MRI scan. What was the purpose of your scan ? Did you have an injection ?
Did you ever get an answer for the cause of your prominent veins because mine are starting to display a swollen appearance – not as marked as yours were though but, never-the-less more noticeable than previously.