Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . Oxygenation device projects over the right lung apex . There is mild interstitial edema . Retrocardiac opacity may be in part due to technique with possible underlying atelectasis or consolidation . Elsewhere the lungs are clear of focal consolidation . Cardiomediastinal silhouette is within normal limits for technique . Dense atherosclerotic calcifications seen at the aortic arch . No acute osseous abnormality is detected .
    OUTPUT:
    
Mild pulmonary vascular congestion . Retrocardiac opacity potentially in part technical or due to atelectasis noting infection is not entirely excluded .