Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were performed . Blunting of the left costophrenic angle , most pronounced posteriorly , is again seen . There is no right pleural effusion . There is no pneumothorax or focal airspace consolidation . The cardiac and mediastinal contours are unchanged . A rounded density projecting over the right lower lung is unchanged from ___ . Old right rib fractures are noted . Sternotomy wires , mediastinal clips and a valve prosthesis are unchanged .
    OUTPUT:
    
No acute cardiopulmonary process .