Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Streaky left basilar opacity is likely due to atelectasis . The lungs are otherwise clear without focal consolidation , effusion , or edema . The cardiomediastinal silhouette is stable . Atherosclerotic calcifications again noted at the aortic arch . Left lateral rib fractures are chronic . Loss of intervertebral disc height visualization in the mid thoracic spine at 2 contiguous levels is unchanged .
    OUTPUT:
    
No acute cardiopulmonary process .