Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral images of the chest demonstrate improvement in the diffuse bilateral opacities from prior imaging . The loculated pleural effusion in the left lower zone has also improved since prior imaging . There remains some opacification in the retrocardiac area . Chain sutures are noted along the left hemidiaphragm . Diffuse lung markings are seen , indicative of elevated pulmonary venous pressure . The cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Interval improvement in diffuse bilateral lung opacities with some opacification remaining in the retrocardiac area . Improvement of the left - sided loculated pleural effusion .