Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Widespread bilateral lung opacities , not significantly changed since ___ slightly improved since ___ . The patient has left - sided pacemaker in adequate position . There is no significant pleural effusion or pneumothorax . Moderate cardiomegaly is unchanged .
    OUTPUT:
    
Bilateral opacification has slightly improved since ___ not significantly changed since ___ , it could be due to slow - resolving multifocal pneumonia . The evolution is atypical for pulmonary edema or aspiration .