Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild pulmonary edema has improved since the prior exam . There is no focal consolidation , pleural effusion or pneumothorax . The cardiomediastinal slight is stably enlarged . Median sternotomy wires are intact . A valve replacement is noted . The imaged upper abdomen is unremarkable .
    OUTPUT:
    
Improved pulmonary edema since the prior exam . No acute process .