Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph obtained demonstrates midline sternotomy wires . Lung volumes are low . Bilateral moderate - sized pleural effusions with lower lobe consolidation is noted likely representing compressive atelectasis . There is mild pulmonary edema . The heart size can not be assessed . Upper lungs appear grossly well aerated without pneumothorax .
    OUTPUT:
    
Mild pulmonary edema with bilateral moderate pleural effusions and consolidative opacities in the lower lungs likely representing atelectasis , though can not exclude pneumonia .