Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral lower lung volumes , partially due to patient positioning and lack of full inspiration . No focal consolidation , pulmonary edema , pleural effusion , or pneumothorax . Stable moderate cardiomegaly . Median sternotomy wires appear intact and unchanged in position .
    OUTPUT:
    
No acute cardiopulmonary process .