Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no focal consolidation , pleural effusion or pneumothorax . Left retrocardiac opacity most likely represents atelectasis . There is central bronchial wall thickening which is a nonspecific finding but raises the possibility of small airways disease . Cardiomediastinal contours are within normal limits . No pulmonary edema or pneumothorax . No pleural effusions . No acute osseous abnormalities identified . Specifically , no displaced rib fractures seen . However , if this is of clinical concern , a dedicated rib series should be considered .
    OUTPUT:
    
1 . No acute cardiopulmonary process . Central bronchial wall thickening which may reflect small airways disease . Clinical correlation is recommended .