First application of carbon dioxide digital subtraction enterography for stricture evaluation in Crohn’s disease

First application of carbon dioxide digital subtraction enterography for stricture evaluation in Crohn's disease Fig. 1 Panels (a-d) show serial CDDSE digital subtraction images.Compared with the pre- image, areas with greater CO 2 accumulation appear white (blue arrows), whereas those with less CO 2 appear black (orange arrows), reflecting CO 2 flow and enabling assessment of the intestine.The stricture is visualized as indicated by the red arrowhead. Fig. 2 Balloon dilation was performed using a 15-mm balloon dilator, maintained for 1 minute.