Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear without focal consolidation , pneumothorax , or pulmonary edema . Mild blunting of the left costophrenic angle may represent atelectasis , pleural thickening or trace pleural fluid . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
No acute cardiopulmonary process .