Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are normal . The lungs are clear . There is no pleural effusion , pneumothorax or focal airspace consolidation . The heart is mildly enlarged , unchanged from 3 days prior . There is no evidence for pulmonary edema . The mediastinal and hilar structures are unremarkable .
    OUTPUT:
    
Mild cardiomegaly without a superimposed acute pulmonary process .