Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP supine radiograph of the chest demonstrate low lung volumes with prominent interstitial markings compatible with pulmonary mild pulmonary edema . The heart appears enlarged overall unchanged in size when compared to examination dated ___ . The hilar and mediastinal silhouettes are stable in appearance . Patient is status post median sternotomy and aortic valve repair . The lungs are without a focal opacity . There is no left - sided pleural effusion . A possible small right - sided pleural effusion as evidenced by obscuration of the right hemidiaphragm . There is a fracture through the lateral aspect of the ___ right rib . No pneumothorax is identified .
    OUTPUT:
    
1 . Cardiomegaly , stable in appearance since prior examination dated ___ . 2 . Mild interstitial pulmonary edema . 2 . Right 8th rib fracture with small left sided pleural effusion . No pneumothorax .