Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear left basilar opacity is most suggestive of atelectasis . Elsewhere the lungs are clear where not obscured by the left chest wall pacing device . Cardiomediastinal silhouette is within normal limits . Chronic deformity of the left humeral head is only partially visualized .
    OUTPUT:
    
No acute cardiopulmonary process .