Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to chest radiographs from ___ , mild bibasilar atelectasis has improved , though now mild . Lung volumes remain low . There is no focal consolidation . No pleural effusion . There is increased central vascular congestion without overt pulmonary edema . Mediastinal and hilar contours are stable . Mild cardiomegaly is unchanged . Left cardiac pacing device with dual leads following their expected courses to the right atrium and right ventricle .
    OUTPUT:
    
No evidence of pneumonia .