Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mildly improved aeration within the right lower lobe since prior examination . Persistent bilateral heterogeneous lower lobe opacities are unchanged since prior examination . Small left pleural effusion is stable . No right pleural effusion . No pneumothorax . The heart is top - normal in size and obscured due to overlying parenchymal opacities . Mediastinal contour and hila are unremarkable . Intact median sternotomy wires and mediastinal clips . A right IJ CVL tip is in the mid SVC .
    OUTPUT:
    
1 . Mildly improved right lower lobe aeration . 2 . Persistent bilateral heterogeneous lower lobe opacities are worrisome for aspiration or infectious process 3 . Stable small left pleural effusion .