Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extremely low lung volumes are seen with crowding of the bronchovascular markings . There is no confluent consolidation or large effusion . Cardiomediastinal silhouette is accentuated by technique and low inspiratory effort .
    OUTPUT:
    
Extremely low lung volumes without definite superimposed acute cardiopulmonary process .