Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are free of focal consolidations , pleural effusions or pneumothorax . No pulmonary edema . Mediastinum and bilateral hila within normal limits . Aortic arch calcifications are unchanged in appearance . Stable cardiomegaly . No acute osseous abnormalities . The biventricular pacemaker is appropriately positioned , with leads terminating in the right atrium , right ventricle and coronary sinus .
    OUTPUT:
    
No acute intrapulmonary process to explain patient 's symptoms .