Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The heart is of top normal size with stable cardiomediastinal contours . The lungs are hyperinflated with flattened diaphragms . Streaky left lung base opacity is similar to prior and compatible with atelectasis . A trace right pleural effusion is similar to prior . No pneumothorax . Sternotomy wires , mediastinal clips , and two valvular prostheses are similar to prior .
    OUTPUT:
    
Trace right pleural effusion and left base atelectasis , similar to ___ .