Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright image of the chest . The lungs are hyperinflated and demonstrate severe ephysematous changes . Linear densities are seen at the bilateral medial lung bases . Given patient 's history and without being able to demonstrate to the contrary , these findings likely reflect pulmonary edema with underlying parenchymal distortion from emphysema . There is no pleural effusion or pneumothorax . The right heart is mildly enlarged , but the overall heart size is not enlarged .
    OUTPUT:
    
Linear bibasilar densities likely reflecting pulmonary edema with underlying parenchymal distortion from emphysema .