Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Midline sternotomy wires are again seen . There are small bilateral layering pleural effusions . Lung volumes are low . Probable compressive atelectasis in the lower lungs . The mid to upper lungs appear well aerated without pneumothorax . Heart size can not be assessed . Mediastinal contour appears normal . Bony structures are intact .
    OUTPUT:
    
Small bilateral pleural effusions with lower lung compressive atelectasis . Please note , in the correct clinical setting , a pneumonia in the left lung base can not be excluded .