Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior radiograph , new linear opacities in the left mid and lower lung could be due to pneumonia . No significant pleural effusions . Cardiomediastinal and hilar silhouettes are stable . The right IJ line is unchanged in position .
    OUTPUT:
    
New linear opacities in the left mid and lower lung are concerning for pneumonia , given the clinical history .