Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . Lower lung volumes contribute to vascular crowding at the lung bases , making it hard to exclude early edema . No focal consolidation , effusion , or pneumothorax is present . Cardiac and mediastinal contours are normal . Dual chamber pacing leads project over the expected chambers of the heart .
    OUTPUT:
    
Can not exclude early pulmonary edema .