Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear without confluent consolidation . Pulmonary vasculature remains similar to prior examination . There is no evidence of acute interstitial edema . There is no large pleural effusion . Mediastinal and hilar contours are within normal limits and unchanged . A prosthetic tricuspid valve is in unchanged expected position . Median sternotomy wires appear intact . Mild cardiomegaly is unchanged .
    OUTPUT:
    
No acute cardiopulmonary process