Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged . The aorta remains tortuous . The mediastinal and hilar contours are similar with a small hiatal hernia again noted . The pulmonary vasculature is not engorged . Streaky atelectasis is demonstrated in the lung bases without focal consolidation . No pleural effusion or pneumothorax is identified . There are moderate degenerative changes seen in the thoracic spine .
    OUTPUT:
    
Streaky bibasilar atelectasis . No focal consolidation to suggest pneumonia .