Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is persistent slight blunting of the costophrenic angles . Cardiac and mediastinal silhouettes are stable . No focal consolidation is seen . There is minimal interstitial edema . There is no pneumothorax . Mediastinal contours are stable and unremarkable .
    OUTPUT:
    
Persistent slight blunting of the costophrenic angles may be due to trace pleural effusions are pleural thickening . Minimal interstitial edema .