Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear . No signs of pneumonia or edema . No pleural effusion or pneumothorax . An azygous fissure is noted . Heart and mediastinal contours are normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic process , specifically no signs of pneumothorax .