Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is mildly enlarged , but similar compared to the previous examination . The aorta is tortuous and calcified at the aortic arch . Pulmonary vasculature is not engorged . 8 mm nodular opacity is again noted projecting over the right lung base , unchanged . Atelectasis is seen in the lung bases without focal consolidation . No pleural effusion or pneumothorax is present . There are moderate multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis . Unchanged 8 mm nodular opacity projecting over the right lung base . Again this may reflect a nipple shadow however repeat PA view of the chest with nipple markers is recommended for confirmation , as previously suggested .