Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is diffusely calcified and tortuous . Mediastinal contour is otherwise unchanged . There is crowding of the bronchovascular structures due to low lung volumes . Small left pleural effusion appears chronic . Patchy bibasilar airspace opacities may reflect atelectasis but infection or aspiration can not be excluded . Small right pleural effusion is new in the interval . No pneumothorax is present . There are mild degenerative changes noted diffusely within the imaged thoraco umbar spine .
    OUTPUT:
    
Low lung volumes with patchy bibasilar nonspecific airspace opacities , possibly atelectasis but infection or aspiration can not be excluded . Small bilateral pleural effusions , with the left pleural effusion appearing chronic .