Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Minimal left base atelectasis is seen without definite focal consolidation . There is no pleural effusion or pneumothorax . There is mild prominence of the pulmonary vasculature suggesting mild interstitial edema . The cardiac and mediastinal silhouettes are unremarkable . Aortic knob calcification is seen .
    OUTPUT:
    
Mild interstitial edema .