Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has chronic underlying fibrotic changes with reticulation and honeycombing , most pronounced at the lung bases . On this background , there is slightly increased opacification of the left mid lung field . Right mid and lower lung field patchy opacification seen on the most recent prior study appears slightly improved , perhaps suggestive of slight interval improvement of mild pulmonary edema . Moderate cardiomegaly is unchanged from prior . Chain sutures are seen along the left upper lung field , compatible with prior wedge resection . There is no pneumothorax . Small left pleural effusion is unchanged Bony structures are intact .
    OUTPUT:
    
Slightly increased opacification of the left mid lung compared with the prior exams could suggest pneumonia . Superimposed mild interstitial edema on a background of diffuse fibrotic changes may be minimally improved .