Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There is no focal lung consolidation . Cardiomediastinal silhouette is unchanged . Views of the lung apices are limited due to obscuration by patient 's head . Within these limitations , there is no pneumothorax . There is no pleural effusion .
    OUTPUT:
    
Low lung volumes , but no radiographic explanation for chest pain