Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stable single lead defibrillator with the tip in the right ventricle . The left upper lobe opacity has nearly completely resolved , with residual streaky opacities in the lingula and left upper lobe . No new acute focal consolidation . No pleural effusions or pneumothorax . The cardiac silhouette remains enlarged .
    OUTPUT:
    
Marked interval improvement of the left upper lobe pneumonia