Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and show a linear opacity in the left lower lobe . The cardiac silhouette is mildly enlarged with a calcific density projecting over the anterior left myocardium consistent with known myocardial calcification . There may be a small left pleural effusion . A left - sided pacer terminates with its leads in the right atrium and right ventricle . The patient is status post CABG .
    OUTPUT:
    
Left lower lobe linear opacities could be related to atelectasis .