Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: On the background of interstitial lung disease , there are multiple new opacities including in the left lower lobe opacity as well as potentially right lower lobe concerning for an infectious process . Low lung volumes contribute to bronchovascular crowding . No definitive pleural effusion identified .
    OUTPUT:
    
Findings concerning for multifocal pneumonia superimposed on probable interstitial lung disease . Clinical correlation is advised .