Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged with a left ventricular predominance . The aorta is mildly tortuous . Mediastinal and hilar contours are otherwise unremarkable . There is crowding of bronchovascular structures in the setting of low lung volumes . No overt pulmonary edema is present . There is minimal atelectasis in the lung bases without focal consolidation . No pleural effusion or pneumothorax is detected . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with mild atelectasis in the lung bases .