Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph obtained . Lung volumes are low , though allowing for this , the lungs appear clear . Cardiomediastinal silhouette appears grossly stable with top normal heart size , possibly magnified due to portable AP technique . Bony structures are intact .
    OUTPUT:
    
No acute findings in the chest . If there is strong concern for PE , recommend CT to further assess .