Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . Mild blunting of left costophrenic angle likely represents focal atelectasis versus scarring . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
No acute intrathoracic process .