Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: One portable AP upright view of the chest . The right apical opacity is stable and concerning for either a nodule or infection . There are low lung volumes which exaggerates the bibasilar atelectasis . Anterior fusion hardware is seen . The cardiac , mediastinal and hilar contours are normal .
    OUTPUT:
    
1 . Right apical opacity concerning for either infection or nodule . 2 . Other than low lung volumes , no significant change compared to most recent study .