Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest is compared to previous exam from ___ . Exam is limited as the bilateral bases are excluded from the field of view . Where seen the lungs appear clear . Cardiac silhouette is slightly enlarged likely accentuated by positioning however is unchanged . Dense atherosclerotic calcifications noted at the arch . Osseous and soft tissue structures are unchanged .
    OUTPUT:
    
Unremarkable limited portable chest x-ray .