Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size and pulmonary vascularity have mildly improved since prior . Strand of retrosternal fibrosis . There is no effusion . No pneumothorax . No consolidations . Mild interstitial prominence bilateral lungs , may be inflammatory or infectious .
    OUTPUT:
    
Mild interstitial prominence bilateral lungs , may be inflammatory or infectious . No consolidation .