Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . Patient is status post median sternotomy , the wires appear intact . Cardiomediastinal contour is within normal limits . There is no focal opacity convincing for pneumonia . Eventration of the right hemidiaphragm is noted . There is no pleural effusion or pneumothorax . Note is made of significant degenerative changes without bilateral acromioclavicular joints . No acute osseous abnormality is detected .
    OUTPUT:
    
No acute intrathoracic abnormality .