Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs demonstrate resolution of mild interstitial edema with a small , persistent pleural effusion . There is no focal consolidation or pneumothorax . The left hemidiaphragm is persistently elevated dating back to ___ . The cardiomediastinal silhouette is stable .
    OUTPUT:
    
Improvement of interstitial edema from ___ . No evidence of pneumonia .