Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no lobar consolidation , pleural effusion , pneumothorax , or pulmonary edema . Linear airspace opacity within the mid to lower left lung is noted on both the AP and lateral views , and likely represents linear atelectasis . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Platelike atelectasis within the left mid lung . Otherwise , no evidence for acute cardiopulmonary process .