Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate enlargement of cardiac silhouette is relatively unchanged compared to the prior study . The aorta remains unfolded . Lung volumes are low with crowding of the bronchovascular structures . Additionally , there is mild pulmonary vascular congestion . No focal consolidation , pleural effusion or pneumothorax is present . Diffuse demineralization of the osseous structures is noted . Mild loss of height of at least 2 low thoracic vertebral bodies appears unchanged .
    OUTPUT:
    
Low lung volumes with mild pulmonary vascular engorgement .