Sinogram

A fistulogram or sinogram is an x-ray procedure to view an abnormal passage  between two or more organs. It may include a passage from inside the body to an opening on the skin. Contrast (once called x-ray dye) is used to identify the start of the fistula/sinus, its pathway and what organs are involved.

What is the meaning of sinogram?

A sinogram is a test to look at a sinus. A sinus is like a fistula. But instead of connecting two organs, it's like a tube that's closed on one end. Both of these tests use X-rays with a special dye that is injected into the area of the fistula or sinus.