Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are unchanged . Mediastinal lymph nodes and lung nodules are better evaluated in prior CT . Left lower lobe atelectasis are unchanged . . There is no pneumothorax or right pleural effusion . Small left effusion is unchanged . The osseous structures are unremarkable
    OUTPUT:
    
No acute cardiopulmonary abnormalities