Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to the prior , there has been no significant interval change . Again seen are extremely low lung volumes secondary crowding of the bronchovascular markings . The lungs are grossly clear . The cardiomediastinal silhouette is stable . No acute osseous abnormalities .
    OUTPUT:
    
Limited exam with low lung volumes without definite superimposed acute cardiopulmonary process .