Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again , there is a triangular - shaped opacity in the right mid lung zone , consistent with right middle lobe atelectasis . Scarring in the right mid lung zone and along the left base is unchanged . The possible nodular opacity in the left upper lung zone appears similar to the prior exams and represents the costochondral junction . There is no new opacity , pulmonary edema , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is normal other than atherosclerotic calcifications at the aortic arch . An eventration of the right hemidiaphragm is unchanged . Surgical clips in the right upper quadrant are likely from a prior cholecystectomy .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Unchanged right middle lobe atelectasis and bilateral scarring . Again , a non-emergent CT of the chest is recommended for further characterization given persistent middle lobe atelectasis .