Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes , which accentuates bronchovascular markings . There is no pleural effusion , focal consolidation or pneumothorax . Linear opacity in the left lung base likely represents atelectasis . Hilar and mediastinal silhouettes are unchanged . Mild perihilar vascular congestion is noted . Heart size is top normal . Moderate hiatal hernia is present .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .