Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal AP and lateral views of the chest were obtained . The lungs are hyperinflated , unchanged from the prior study . Mild atelectasis at the left lung base is noted . There is no focal consolidation , pleural effusion or pneumothorax . Cardiac and mediastinal silhouettes are stable with aortic knob calcifications and a mildly tortuous aorta . A small bulge in the descending thoracic aorta is unchanged since at least ___ and may represent a small anuerysm or focal dissection . Mild compression deformity in the mid thoracic spine is unchanged since ___ . The patient is status post right mastectomy .
    OUTPUT:
    
No pneumonia , effusion , or edema .