Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left PICC tip projects over the mid SVC . Lung volumes remain low and there are bibasilar opacities , better characterized on recent CT . Cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
No significant interval change . Persistent bibasilar opacities likely in part due to atelectasis given low lung volumes though underlying parenchymal opacities were better characterized on recent prior CT .