Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear opacity on lateral view projecting over the heart may be due to atelectasis potentially in the right middle lobe . The lungs are otherwise clear . There is no consolidation , effusion , or edema . Cardiomediastinal silhouette is within normal limits . Atherosclerotic calcifications noted at the aortic arch . No acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process .