Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Focal opacities in the right upper lobe have mostly resolved . Background coarse lung markings appear unchanged and are suspected to represent airway inflammation or possibly vascular congestion , although vascular prominence has decreased substantially . This appearance is unchanged but most striking in posterior lower lobes . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is stable . The pacer is seen overlying the left anterior chest with intact leads in appropriate positions . Atherosclerotic calcification is seen in the aortic arch .
    OUTPUT:
    
Marked improvement in vascular congestion and focal right upper lobe opacities . Persistent moderate interstitial abnormality .