Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP view of the chest was provided . AICD pack overlies the left chest wall with pacer lead extending into the right atrium and right ventricle . Lung volumes are low . No focal consolidation , effusion , or pneumothorax is seen . Heart size and mediastinal contour appears normal . Bony structures are intact .
    OUTPUT:
    
Low lung volumes . No acute intrathoracic process . Please refer to subsequent CT chest for further details .