Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size remains mildly enlarged . Mediastinal and hilar contours are unremarkable . Crowding of bronchovascular structures is present without overt pulmonary edema . No focal consolidation , pleural effusion or pneumothorax is present . Mild loss of height of a vertebral body at the thoracolumbar junction appears similar to the previous radiograph .
    OUTPUT:
    
Low lung volumes . No acute cardiopulmonary abnormality .