Vaginal ultrasound cannot detect cervical cancer, which can be diagnosed through colposcopy by taking samples of diseased tissues for pathological examination. It is also possible to do preliminary screening through TCT, and if cancer cells are found, then further pathological biopsy can be done to confirm the diagnosis. Vaginal ultrasound is to examine the uterus, as well as the adnexal area and pelvic tissues through the vagina by means of a special vaginal probe. Vaginal ultrasound has a higher clarity than abdominal ultrasound because the vaginal probe is closer to the examination site and avoids the effect of the bladder area during abdominal ultrasound. Vaginal ultrasound can be used for monitoring the size of uterine morphology, endometrial thickness, uterine fibroids, endometriosis, fallopian tube lesions, ovarian cysts, follicular development, as well as cervical cysts and other gynecological disorders, providing a basis for clinical treatment.