Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are hazy bibasilar opacities which could be in part due to technique and overlying soft tissues although there is more dense opacity in the retrocardiac region . Superiorly , the lungs are clear of consolidation . Cardiomediastinal silhouette is within normal limits given positioning and technique . No acute osseous abnormalities identified .
    OUTPUT:
    
Possible retrocardiac opacity for which dedicated PA and lateral may help further characterize if patient is amenable .