Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable frontal chest radiograph demonstrates intact median sternotomy wires . Low lung volumes with bibasilar atelectasis . No pleural effusion or pneumothorax . No focal opacity . Prominent perihilar interstitial opacities with cephalization is post consistent with mild vascular congestion . No focal opacity . Aortic arch calcifications are noted . Mild prominence of the heart size is likely related to low lung volumes and patient positioning . Mediastinal contour and hila are unremarkable . Limited assessment of the osseous structures are unremarkable and visualized upper abdomen is within normal limits .
    OUTPUT:
    
1 . Mild vascular congestion . 2 . No evidence of pneumonia .