Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , causing bronchovascular crowding . The heart is top - normal in size . However , there is no pleural effusion , focal consolidation , or pneumothorax . The hilar and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
No acute intrathoracic process . Top - normal heart size .