Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Postoperative changes related to left upper lobe resection are similar . Cardiomediastinal contours are stable . Worsening opacity at the right lung base is predominantly linearly oriented and accompanied by volume loss . However , more subtle areas of opacity in the left mid and lower lung are unaccompanied by volume loss and could potentially represent a developing infection . Left - sided pleural thickening and / or effusion is unchanged . There is no visible pneumothorax .
    OUTPUT:
    
1 . Left mid and lower lung opacities , which could potentially represent a developing pneumonia given the clinical suspicion for infection . 2 . Right lower lobe opacities favor atelectasis given their predominantly linear orientation and accompanying volume loss . 3 . Small right pleural effusion and moderate left loculated pleural fluid and / or thickening .