Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is moderately low bilateral lung volume . Lungs are otherwise clear with no focal consolidation , lesions , pleural effusion , or evidence of pneumothorax . The heart is borderline normal in size ; otherwise , cardiomediastinal silhouette is unremarkable . The pleural surfaces are within normal limite . Degenerative changes of the thoracic spine discordant with age is noted .
    OUTPUT:
    
No evidence of infection or malignancy .