Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild left base atelectasis is seen . No focal consolidation is seen . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are unremarkable . Aortic arch calcification is seen . Previously seen pulmonary edema has significantly improved in the interval , with no overt pulmonary edema seen currently .
    OUTPUT:
    
No acute cardiopulmonary process .