Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiographs demonstrate stable bilateral low lung volumes with persistent elevation of the left hemidiaphragm with air distended bowel beneath . Mediastinal contours are stable . The cardiac contour is not well evaluated due to elevation of the diaphragm . Compared to prior study , there is increased pulmonary vascular congestion . No focal opacification concerning for pneumonia identified . No pleural effusion or pneumothorax evident .
    OUTPUT:
    
Low lung volumes . No focal opacification concerning for pneumonia . Mild prominence of the pulmonary vasculature may indicate mild volume overload .