Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior chest radiograph performed on ___ , lung volumes appears slightly lower . Imaged portions of the right lung is essentially clear , although the apex is obscured . There are diffuse reticular interstitial opacities , which may represent mild interstitial pulmonary edema superimposed upon underlying chronic lung disease . This has improved compared to ___ . No new consolidation . No sizable pleural effusions . Old right humeral neck fracture .
    OUTPUT:
    
Low lung volumes , with overall improved interstitial pulmonary edema .