Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Multi airspace opacity have slightly improved in the lingula and right lower lobe . Persistent partial left lower lobe collapse . Pulmonary vascular congestion and interstitial edema have also improved . Moderate left and small right pleural effusions have both decreased .
    OUTPUT:
    
Interval improvement in the interstitial pulmonary edema and slight improvement in multifocal airspace opacities . Chronic left lower lobe volume loss and opacification can be recurrent aspiration or postobstructive pneumonia .