Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear , without focal infiltrate , pleural effusion , or pneumothorax . The heart size is normal . The mediastinal silhouette is unremarkable . A left mid clavicular fracture is noted and better characterized on dedicated clavicular films . A left lower lung opacity is likely a nipple shadow .
    OUTPUT:
    
No acute cardiopulmonary process . Left clavicular fracture .