Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is within normal limits for age and technique and remains midline . There is atelectasis in the right upper zone , with several bandlike opacities . The right hemidiaphragm is probably slightly elevated . There is atelectasis at both lung bases . More hazy opacity at right base may reflect the presence of a small effusion . Mild vascular plethora is noted , consistent with mild CHF . A left chest tube is present . No pneumothorax is detected .
    OUTPUT:
    
Atelectasis in the right upper zone , as well as left base . CHF with interstitial edema . Possible small right effusion .