Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The aorta is calcified and tortuous . There is no pleural effusion or pneumothorax . A nodular opacity projecting over the left lower lung suggests a nipple shadow rather than a true pulmonary nodule . Vague opacity is noted in the basilar right lower lobe in both views . Bony structures are unremarkable .
    OUTPUT:
    
1 . Vague right lower lobe opacity , probably atelectasis , although pneumonia is not excluded . 2 . Vague nodular focus projecting over the left lower lung , probably a nipple shadow , with a pulmonary nodule less likely . An additional PA view with nipple markers is recommended to assess further .