Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal view of the chest was obtained portably . Low lung volumes result in bronchovascular crowding . Mild opacity at the right lung base probably represents crowding of vessels but may represent aspiration or infection in the appropriate clinical setting . A 1 cm opacity at right upper lung . The cardiac silhouette is upper limits of normal size , allowing for patient position and technique . Mediastinal silhouette and hilar contours are within normal limits . Rounded opacity in the retrocardiac region is suggestive of a hiatal hernia . Surgical clips project over the right neck .
    OUTPUT:
    
1 . Right basilar opacity is probably crowding of vessels , but may represent aspiration or infection in the appropriate clinical setting . 2 . 1 cm opacity projects over right upper lung , likely asymmetric degenerative changes ; however , repeat PA / lateral views with apical lordodic view as well suggested to exclude lung lesion .