Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Assessment is limited by patient rotation and low lung volumes . Heart size is moderately enlarged . Widening of the mediastinal contours is likely due to low lung volumes . There is mild pulmonary edema . No large pleural effusion or pneumothorax is detected . Atelectatic changes are seen in the lung bases . No acute osseous abnormalities present .
    OUTPUT:
    
Limited examination due to patient positioning and low lung volumes . Mild pulmonary edema .