Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No consolidation , pleural effusion or pneumothorax is detected . No pulmonary edema . Cardiomediastinal contours are within normal limits . There is no subdiaphragmatic free air . Possible small air - filled pulmonary bleb at the along the left hemidiaphragm posteriorly . No acute osseous abnormalities identified .
    OUTPUT:
    
No acute pulmonary process identified . Suspect small bleb at the left lung base . A small left hiatal hernia is considered less likely .