Intraoperative 360-deg three-dimensional transvaginal ultrasound during needle insertions for high-dose-rate transperineal interstitial gynecologic brachytherapy of vaginal tumors

术中 360 度三维经阴道超声在高剂量率经会阴间质妇科阴道肿瘤近距离放射治疗中的应用