Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . Pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is present . Focal bulge along the posterior left diaphragmatic contour is noted , corresponding to a small fat - containing left diaphragmatic hernia as seen on the CT performed the same day . No acute osseous abnormalities seen . There is no subdiaphragmatic free air .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No subdiaphragmatic free air .