Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild left basilar opacity is identified , likely atelectasis . The lungs are otherwise clear . The cardiomediastinal silhouette is stable . Atherosclerotic calcifications noted throughout the thoracic aorta . No acute osseous abnormalities detected .
    OUTPUT:
    
Probable left basilar atelectasis , otherwise no acute cardiopulmonary process .