Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided pacer / defibrillator and dual leads are in unchanged position . The heart is enlarged but stable in size from the prior examination on ___ . Lung volumes are low . Bilateral pulmonary opacities are increased from the prior examination and asymmetrically involve the right lung . There is mild pulmonary vascular congestion There is elevation of the right hemidiaphragm , as before . There is no definite pleural effusion or pneumothorax . Persistent right apical opacity likely represents a small , resolving hematoma associated with prior chest tube placement , which is decreased in size from multiple prior exams .
    OUTPUT:
    
Bilateral airspace opacities suggest pulmonary edema , which asymmetrically involves the right lung however concurrent infection should be considered in the appropriate clinical setting . Persistent small right pleural effusion .