Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The aorta is mildly tortuous , otherwise the mediastinal and hilar contours are unremarkable . Lung volumes are low resulting in bronchovascular crowding . The lungs are however clear without evidence of focal consolidations concerning for pneumonia or evidence of pulmonary edema . There is no pleural effusion or pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
No evidence of pulmonary edema or pneumonia .