Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views demonstrate hyper expanded lungs with flattening of diaphragms bilaterally consistent with emphysematous changes . No focal opacity convincing for pneumonia is identified . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion , pulmonary edema , or pneumothorax . Osseous structures are without an acute abnormality . Multilevel degenerative changes are noted throughout the thoracolumbar spine . No air under the right hemidiaphragm is identified .
    OUTPUT:
    
Emphysema . No acute intrathoracic abnormality .