Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are lower . Mild left basilar atelectasis . The lungs are otherwise clear without consolidation . There is pulmonary vascular congestion without overt edema . Mild cardiac enlargement is noted as well as tortuosity of the thoracic aorta . Left chest wall single lead pacing device is noted . No acute osseous abnormalities .
    OUTPUT:
    
Mild vascular congestion without pulmonary edema .