Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lower lung volumes seen on the current exam . Increased interstitial markings at the lung bases , left greater than right which appear chronic . There is no new consolidation . The cardiomediastinal silhouette is within normal limits . Median sternotomy wires and mediastinal clips are again seen . Surgical clips also seen projecting over the upper extremities .
    OUTPUT:
    
No acute cardiopulmonary process .