Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy , and mitral and tricuspid valve replacements . The heart size is normal . The main pulmonary artery is dilated . Mediastinal and hilar contours are otherwise unchanged . There has been interval improvement in the previous pattern of pulmonary edema , with only mild pulmonary vascular engorgement remaining . Minimal right pleural effusion is similar . No left - sided pleural effusion or pneumothorax is identified . No acute osseous abnormalities are seen .
    OUTPUT:
    
Interval improvement in previous pattern of pulmonary edema , with only mild pulmonary vascular congestion remaining . Small right residual pleural effusion . Dilated main pulmonary artery .