Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright chest radiograph was provided . A retrocardiac opacity containing gas is compatible with a large hiatal hernia . Calcified nodular opacities in the left mid lung are most compatible with calcified granulomas and appear unchanged . Coarsened reticular markings within the right mid lung appear slightly more confluent as compared with prior exam and could reflect scarring . No convincing evidence of pneumonia or aspiration . No definite pneumothorax or effusion . The heart size appears grossly preserved . The mediastinal contour is unchanged with calcified unfolded thoracic aorta again noted . No acute osseous abnormality is seen .
    OUTPUT:
    
Large hiatal hernia . Probable fibrosis in the right mid lung accounting for reticular opacity . No convincing evidence of pneumonia .