Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is at the upper limits of normal . Cardiomediastinal silhouette is within normal limits for age . A calcified aortopulmonary window lymph node is noted , suggesting prior granulomatous disease . No CHF , focal infiltrate , or effusion is identified . Equivocal minimal blunting of the posterior costophrenic angles . The right hemidiaphragm is eventrated . Along the right paratracheal region , there is a thin vertical linear density -- this may represent the wall of bulla . No conventional apical pneumothorax is detected .
    OUTPUT:
    
1 . No CHF or focal infiltrate 2 . Calcified mediastinal node consistent with prior granulomatous disease . 3 . Linear lucency in the right paratracheal region --? bulla