Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to exam on ___ , there is linear opacity in the left lower lobe with associated elevation of the left hemidiaphragm , likely due to left lower lobe atelectasis . Heart size is mildly enlarged . Mediastinal and hilar contours are unremarkable . There is no evidence for pulmonary edema , pulmonary consolidation , pleural effusion , or pneumothorax . Right IJ catheter terminates in mid SVC .
    OUTPUT:
    
Left lower lobe atelectasis and unlikely to be pneumonia .