Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . No focal consolidation , pulmonary edema , pleural effusion , obvious pulmonary mass , or pneumothorax . The heart is top - normal in size , unchanged . The mediastinum is not widened . The hila are within normal limits .
    OUTPUT:
    
No acute intrathoracic process . No radiographic evidence of a mass .