Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is mildly tortuous . Mediastinal and hilar contours are otherwise within normal limits . The pulmonary vasculature is not engorged . Mild elevation of the left hemidiaphragm is of unknown chronicity . There are trace bilateral pleural effusions with mild left basilar atelectasis . No focal consolidation or pneumothorax is present . Degenerative changes are noted involving both acromioclavicular joints and throughout the imaged thoracic spine .
    OUTPUT:
    
Trace bilateral pleural effusions with mild left basilar atelectasis . No focal consolidation .