Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal upright view of the chest was obtained portably . The patient is rotated and the chin obscures the left apex . Lung volumes are slightly lower than on the prior study . There is mild bibasilar atelectasis . No focal consolidation and no large pleural effusion or pneumothorax . Mild interstitial pulmonary edema and moderate cardiomegaly are unchanged .
    OUTPUT:
    
Bibasilar atelectasis . No pneumonia or large effusion .