Tubal imaging is a test used to check the patency of the fallopian tubes in women and has corresponding indications and contraindications: I. Indications 1, the segments of the fallopian tubes are not visualized or partially visualized in routine hysterosalpingography, in order to distinguish between tubal spasm or obstruction. 2. Tubal recanalization is feasible for obstruction in the interstitial part of the fallopian tube, isthmus and proximal part of the jugular abdomen. 3. Conventional hysterosalpingography is not completed due to relaxation of the cervical opening. Contraindications 1. Obvious tubal effusion, obvious encapsulation of the umbilical end, obstruction in the distal part of the abdomen and umbilical end are not suitable for guidewire catheter recanalization. 2. Tuberculous tubal obstruction, obstruction after tubal anastomosis by ligation. 3, fever, acute and subacute internal genital inflammation, pelvic inflammatory disease, various vaginitis, acute attack of chronic inflammation, active tuberculosis. 4.Iodine allergy. 5.People who are in menstruation and have uterine bleeding. 6.People with severe pelvic adhesions and severe uterine horn occlusion.