Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate low lung volumes , with increased prominence of the cardiac silhouette and bronchovascular crowding . Retrocardiac opacity , better seen on the lateral view , is unchanged compared to ___ , likely represents prominent vasculature projecting over the lower thoracic spine . No pleural effusion or pneumothorax is identified . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
No definite consolidation identified . The lung volumes are low with resultant crowding of bilateral pulmonary vasculature , of which appears more prominent on the lateral radiograph , however has an unchanged appearance compared to ___ .