Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pectoral pacer leads are in stable position . Again noted are low lung volumes with subpleural fibrosis , better characterized on prior CT . However , there is no pulmonary vascular congestion or pleural effusion . The cardiomediastinal silhouette is stable . Severe degenerative changes of the lower lumbar spine are noted .
    OUTPUT:
    
No evidence of pulmonary edema . Chronic interstitial fibrosis makes superimposed infection difficult to exclude . Wet reading was relayed by Dr . ___ to ___ at the office of Dr . ___ by phone at 2 :40 p .m . on ___ .