Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomegaly is mild . There is pulmonary vascular congestion and mild pulmonary edema . There is no pneumothorax probable bilateral tiny pleural effusions . Osseous structures are unremarkable . Calcifications of the aortic arch are dense . The positioning of a left pacemaker generator and leads are unchanged .
    OUTPUT:
    
Mild pulmonary edema are improved from ___ .