Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is not enlarged . The cardiomediastinal silhouette is within normal limits . No CHF , focal infiltrate , effusion , or pneumothorax is detected . The osseous structures about the chest are grossly unremarkable . No free air seen beneath the diaphragm . Possible slight asymmetry of the breast shadows , though this could be an artifact due to positioning . Small linear density overlying the left lateral upper abdomen is not fully characterized , but could represent a surgical clip .
    OUTPUT:
    
No acute pulmonary process identified . No pneumonic infiltrate detected .