Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . The pulmonary vasculature shows perihilar fullness , upper zone re-distribution and indistinct contours , all suggesting mild pulmonary edema . Patchy opacity at the left lung base improved and may be due to residual atelectasis but not specific .
    OUTPUT:
    
Findings suggesting mild pulmonary edema . Patchy left basilar opacity , which may be due to residual atelectasis at the left lung base . If there is clinical concern for the possibility of developing infection , short - term follow - up radiographs may be helpful .