Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The examination is limited secondary to underpenetration due to patient body habitus . The heart remains significantly enlarged , which may be secondary to cardiomegaly or pericardial effusion , but essentially unchanged as compared to the prior examination . The aorta is tortuous and unfolded . The lung volumes remain mildly low , and there is bibasilar atelectasis . Patient is rotated to her right , with the right heart border simulating and a region of abnormality in the right lung . There is a possible small left pleural effusion . No pneumothorax is identified . Multilevel degenerative changes are noted within the thoracic spine .
    OUTPUT:
    
1 . No definite lung abnormality aside from mild bibasilar atelectasis . 2 . Stable , severe cardiomegaly .