Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is moderately enlarged . The aorta is tortuous and diffusely calcified . Mild pulmonary edema is present . Linear opacities in the left lung base likely reflect areas of subsegmental atelectasis . Streaky atelectasis is also noted in the right lung base . No large pleural effusion or pneumothorax is identified . The osseous structures are diffusely demineralized with moderate multilevel degenerative changes .
    OUTPUT:
    
Mild pulmonary edema and bibasilar atelectasis .