Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest radiograph is provided . Since the prior radiograph , there has been no significant change . There is mild pulmonary edmea as well as patchy opacities in the lower lung zones bilaterally , which is liekly atelectasis . Small bilateral pleural effusions are stable . Moderate cardiomegaly is unchaged . There are degenerative changes noted at the humeral heads bilaterally .
    OUTPUT:
    
No significant change since the prior radiograph . Mild pulmonary edema and likely atelectasis at the bases . Unchanged small bilateral pleural effusions .