Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires and prosthetic cardiac valve again noted . There are bilateral pleural effusions again seen , small in volume with basilar atelectasis . No evidence of edema , pneumothorax . Evaluation for pneumonia limited in the lower lungs though mid upper lungs appear well aerated . The heart size is stable and mildly enlarged . The bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Stable mild cardiomegaly with small bilateral pleural effusions and basilar atelectasis , can not exclude pneumonia .