Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly decreased . Left retrocardiac atelectasis is noted . There is no evidence of focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . Allowing for AP projection , the cardiac silhouette is top - normal in size .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .