Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . Heart is mildly enlarged though this is stable when compared to prior study dated ___ . A left chest pacer is identified with these projecting over the right and atrium and right ventricle in unchanged position . No evidence of pulmonary edema . There is no pneumothorax . No large pleural effusion is seen .
    OUTPUT:
    
No acute intrathoracic abnormality .