Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes , and a sub - optimal inspiratory effort . Allowing for changes due to this , the cardiomediastinal silhouettes are stable . Diffuse interstitial prominence may relate to bronchovascular crowding in the setting of low lung volumes . There is no focal lung consolidation . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . Low lung volumes .