Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are within normal limits . The lungs are air under - inflated , resulting in bronchovascular crowding . There is no pneumothorax , focal consolidation , or pleural effusion . The central pulmonary vasculature is prominent , however , there is no overt edema .
    OUTPUT:
    
Low lung volumes . No acute intrathoracic process .