Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right chest wall port is seen in unchanged position . Compared with prior , the subtle opacities in the lungs bilaterally are less conspicuous . There is no confluent consolidation , effusion , or vascular congestion . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Subtle bilateral parenchymal opacities on prior chest x-ray are not clearly identified . No new region of consolidation .