Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest is compared to previous exam from ___ . Lower lung volume is seen on the current exam . Linear opacity at the left lung base suggestive of a epicardial fat pad . Lungs are otherwise clear . Moderate hiatal hernia is again noted . Cardiomediastinal silhouette is unchanged given differences in inspiratory effort and technique . Osseous and soft tissue structures are unremarkable . No free air seen below the diaphragm .
    OUTPUT:
    
No acute cardiopulmonary process .