Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is enlarged but stable in size from prior examinations . The aorta is markedly tortuous , but overall similar in size and appearance to prior exams . Lung volumes are somewhat low . There is mild bibasilar atelectasis . No pneumothorax . Compared to the prior study , rightward tracheal bowing appears increased , most likely due to positioning and degree of inspiration . Large ossific density inferior to the left humerus is again noted . Right seventh rib fracture is re - demonstrated . There is no pleural effusion . No evidence of pulmonary edema .
    OUTPUT:
    
Mild bibasilar atelectasis . No pneumothorax or pleural effusion . No evidence of pulmonary edema .