Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes continue to be low . Bibasilar opacities are mildly improved , however predominantly basal fibrosis persists . There is no evidence of pulmonary edema or pleural effusion . The cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
No pneumonia . Persistent predominantly basal fibrosis , consistent with history of idiopathic lung disease .