Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Streaky linear opacities at the left lung base likely reflect atelectasis versus scar . There is no evidence of focal consolidation , pleural effusion , pneumothorax , or frank pulmonary edema . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Streaky left basilar atelectasis versus scar . No lobar consolidation .