Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Dual lead pacemaker is seen over the left chest wall with leads extending into the heart . Overlying EKG leads are present . Lung volumes are low limiting assessment . There is mild streaky opacity in the left lower lung which could represent atelectasis versus pneumonia . Otherwise the lungs appear clear . The heart size is within normal limits allowing for technique . Mediastinal contours normal . No acute bony abnormalities .
    OUTPUT:
    
Streaky opacity in the left lower lung could represent atelectasis versus pneumonia .