Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size and mediastinal contours are normal . The lungs are clear ; incidental note is made of a right - sided diaphragmatic eventration which accentuates the depth of the right costophrenic sulcus but on the prior exam , this is not concerning for pneumothorax , especially given it is stable from prior exam . There is no pleural effusion or pneumothorax . Mild degenerative changes are present in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .