Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . Midline sternotomy wires are again noted . Cardiomegaly is mild . Lung volumes are low . No effusion or overt CHF . No pneumothorax . Bony structures are intact .
    OUTPUT:
    
No overt edema or other acute intrathoracic process .