Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The aorta is slightly tortuous with atherosclerotic calcifications noted at the arch . Hilar contours are similar . The pulmonary vasculature is not engorged . Streaky opacities are noted in the lung bases without focal consolidation . No pleural effusion or pneumothorax is detected . No acute osseous abnormalities seen .
    OUTPUT:
    
Streaky opacities in the lung bases , likely atelectasis .