Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and mitral valve replacement . Heart size is top - normal but stable . There is mild pulmonary vasculature prominence with cephalization compatible with mild pulmonary edema . The lungs demonstrate no focal opacities . There is no pleural effusion or pneumothorax . Lower cervical and thoracic vertebrae demonstrate multi - level degenerative changes with osteophytosis . Vertebral body height appear preserved .
    OUTPUT:
    
Mild pulmonary edema .