Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . Lung volumes markedly low limiting assessment . Overlying EKG leads are present . There is mild scattered subsegmental atelectasis . No convincing signs of pneumonia or edema . No large effusion or pneumothorax . Cardiomediastinal silhouette appears grossly unchanged allowing for differences in technique . Bony structures are intact .
    OUTPUT:
    
Scattered subsegmental atelectasis . Otherwise no acute findings . Limited exam .