Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . There is an area of linear opacity representing plate - like atelectasis of the left lower lung . There is no focal consolidation , pleural effusion , or significant pulmonary edema . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary disease .