Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are obtained . Lung volumes are markedly low which limits evaluation . An AICD is unchanged with proximal lead in the expected location of the right atrium and distal lead in the expected location of the right ventricle , unchanged . Given the low lung volumes , evaluation is limited , though the imaged portion of the lungs appears clear . No large effusion or pneumothorax is seen . Heart size appears enlarged , though this may be technique - related . Bony structures are intact .
    OUTPUT:
    
Markedly limited exam without definite signs of pneumonia .