Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP portable view of the chest . No prior . The lungs are clear of large confluent consolidation . Cardiac silhouette enlarged but could be accentuated by positioning and relatively low inspiratory effort . Calcifications noted at the aortic arch . Degenerative changes noted at the glenohumeral joints bilaterally . Osseous and soft tissue structures otherwise unremarkable .
    OUTPUT:
    
No definite acute cardiopulmonary process . Enlarged cardiac silhouette could be accentuated by patient 's positioning .