Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low , accentuating heart size , which is top - normal , and crowding the pulmonary vascular structures , which are mildly congested . A right PICC terminates in the right atrium , likely partially due to hypoinflation . There is no large pleural effusion , pneumothorax , or overt pulmonary edema .
    OUTPUT:
    
Low lung volumes with mild pulmonary vascular congestion . No evidence of pneumonia .