Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild increase in left mid lung opacity compared to the prior study . Stable bilateral lower lobe reticular opacities are re - demonstrated in this patient with known interstitial lung disease . No definite new focal consolidation . No pleural effusion or pneumothorax is seen . Cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Mildly increased left mid lung opacity compare to ___ .