Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single upright portable view of the chest demonstrates relatively low lung volumes , with mild prominence of the hilar structures and perihilar interstitial markings , compatible with mild pulmonary edema . A small left pleural effusion is noted , along with mild biapical pleural thickening . There is no pneumothorax . No focal airspace opacity is detected . The heart is mildly enlarged . Otherwise , the cardiomediastinal silhouette is unremarkable . Median sternotomy wires and mediastinal clips are noted .
    OUTPUT:
    
Mild cardiomegaly , small left pleural effusion and mild pulmonary edema .