Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Median sternotomy wires are intact and well aligned . The patient has undergone prior aortic valve replacement . There has been interval removal of a right central venous catheter . The cardiac silhouette is borderline enlarged . The pulmonary vasculature is unremarkable . A right pleural effusion remains . No pneumothorax is present .
    OUTPUT:
    
No acute intrathoracic process .