Double Contrast Barium Enema
A double contrast barium enema is an X-ray test. It involves the injection of the barium liquid into the colon to deliver clearer pictures of the affected areas. On the X-ray, any polyps and tumors will show up as dark spots. You need to fast for a few hours before starting this process to ensure more precise results. While this technique is more reliable than usual X-rays, it can also be costlier. That is why you need to discuss all of the possible options with your doctor before starting. [4]
