Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior study , inspiratory volumes are lower . Allowing for this , again seen is a small right effusion , with collapse and / or consolidation at the left base . The degree of right base atelectasis is more pronounced . Also again seen is increased retrocardiac density , also more pronounced . There is upper zone redistribution , but no overt CHF . No left - sided effusion . The cardiomediastinal silhouette is grossly similar . Opacity overlying the right lung apex medially appears to relate to a mask or other device outside the the patient -- clinical correlation is requested to confirm this . No pneumothorax identified .
    OUTPUT:
    
Lower inspiratory volumes , with interval increase in atelectasis at both bases . Continuing right pleural effusion with underlying collapse and / or consolidation . The possibility of an associated pneumonic infiltrate can not be entirely excluded . However , the mid and upper zones of both lungs remain clear of focal opacities . Upper zone redistribution , without overt CHF , probably similar to prior . Question mask accounting for faint opacity at the right lung apex medially .