Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest compared to previous exam from ___ and ___ . Relatively lower lung volumes seen on the current exam . Mildly prominent interstitial markings are again seen at the bases and the right mid lung unchanged from ___ given differences in technique and lower inspiratory effort . There is no new confluent consolidation . Mild elevation of the left hemidiaphragm again noted . Median sternotomy wires and mediastinal clips are again noted . Cardiomediastinal silhouette and osseous structures are unchanged .
    OUTPUT:
    
No definite acute cardiopulmonary process .