Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The exam is limited by body habitus and low lung volumes . There is crowding of the bronchovascular structures . No focal airspace opacity is identified . There is no pulmonary edema , pleural effusion , or pneumothorax . An eventration of the right hemidiaphragm is stable . The right hemidiaphragm is elevated in comparison to the left . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Low lung volumes ; no evidence of pneumonia .