Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal opacity , pulmonary edema , pleural effusion or pneumothorax . The cardiac size is normal . A pacer has leads ending in the right atrium and right ventricle . Sternotomy wires are intact .
    OUTPUT:
    
No pulmonary edema or acute intrathoracic process .