Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright AP and lateral radiographs of the chest . There is a small left pleural effusion and left lower lobe atelectasis with chronic elevation of the left hemidiaphragm . Mild cardiomegaly is also chronic , with sternotomy wires noted . There is pulmonary vascular congestion , but no frank interstitial edema . Median sternotomy cerclage wires are intact . There is no pneumothorax .
    OUTPUT:
    
1 ) Left base atelectasis , equivocal small left pleural effusion . 2 ) Pulmonary vascular congestion but no frank edema at this time .