Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is unchanged from prior study . Cardiomediastinal silhouette and hilar contours are unremarkable . Persistent right hemidiaphragm elevation is unchanged . Median sternotomy wires remain in place .
    OUTPUT:
    
Persistent right hemidiaphragm elevation . No acute intrathoracic process .