Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are new subtle ground - glass opacities and bronchial thickening in the left lower lobe compatible with an infectious process . The mediastinal and cardiac contour are unremarkable . There is a moderate compression fracture of D12 that was already present in the MRI of ___ .
    OUTPUT:
    
There are subtle opacities in the left lower lobe that are mostly compatible with an pneumonia . A followup chest X -ray is suggested in 4 weeks for documentation of resolution .