Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are linear opacities of the right middle lobe and left lower lobe , which are consistent with atelectasis . Mediastinum is unchanged . There has been a right mastectomy . There is no pneumothorax . There is new blunting of the left costophrenic angle , which may represent effusion or pleural thickening , and chest CT is recommended for further characterization in this patient with a history of malignancy .
    OUTPUT:
    
1 . Right middle lobe and left lower lobe opacities are consistent with atelectasis . 2 . New blunting of the left costophrenic angle , which may represent effusion or pleural thickening , for which a chest CT is recommended .