Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are seen with secondary crowding of the bronchovascular markings . There is no confluent consolidation or overt pulmonary edema . Cardiomediastinal silhouette is within normal limits . Median sternotomy wires , mediastinal clips , and suspected coronary artery stents are identified . No acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes without definite superimposed acute cardiopulmonary process .