Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP view of the chest provided . Slight elevation of the left hemidiaphragm is unchanged . There is improved overall aeration within the lungs compared with prior exam without definite signs of pneumonia or CHF . Suture material is seen in the left pulmonary hilum , unchanged , compatible with prior partial lung resection . Tubular hyperdensity along the left heart border could represent a coronary stent . No large effusion or pneumothorax . Heart and mediastinal contours are stable with mild cardiomegaly and tortuosity of the thoracic aorta again noted . Imaged osseous structures are intact .
    OUTPUT:
    
No acute findings in the chest . Improved aeration compared with prior . COPD noted .