Fig. 4From: Current imaging techniques for evaluation of fistula in ano: a reviewX-ray fistulogram of a semi-horseshoe fistula showing Deshpande’s technique of double-contrast fistulography with malecot rubber catheter in the anorectal canal to fill air into the rectum (yellow arrow) with a metal marker at anal verge (white arrow). Blue arrow demonstrates the level of the anorectal junctionBack to article page