Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with earlier the same day , I doubt significant interval change . The cardiomediastinal silhouette is unchanged . Slight displacement of the cardiac silhouette by large right base bulla is again noted . Again seen are lobulated , partially calcified masses in both lung apices suggesting prior granulomatous disease and / or silicosis / pneumoconiosis . There is minimal atelectasis at the left lung base , without significant change . No focal infiltrate or effusion is otherwise identified on this AP view . Old healed right - sided rib fractures again noted . A small nodular opacity in the right mid zone laterally overlying the right seventh rib posteriorly measures approximately 6 .0 mm in corresponds to a noncalcified nodular density on the ___ CT scan ( 601 b : 24 ) . Thin caliber appearance of the trachea within the chest raises question of saber sheath trachea / tracheomalacia .
    OUTPUT:
    
1 . Doubt significant interval change . 2 . No new focal opacity to suggest aspiration is identified . 3 . A small non calcified nodular density in the right mid zone has a correlate on the chest CT obtained ___ . Please see separate report of chest CT . 4 . Thin caliber intra thoracic trachea raising question of tracheomalacia .