Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph again demonstrates sternal wires and clips overlying the left mediastinum . The right central line has been removed . There are low lung volumes , with increased prominence of the cardiac silhouette and bronchovascular crowding . No pleural effusion or pneumothorax is identified . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
Mild prominence of the pulmonary interstitial markings without focal consolidation .