A Multi-Modality Comparison of Needle Placement During Gynecological Brachytherapy Procedures

What this Trial Is About

Researchers are investigating the use of 3D ultrasound imaging during brachytherapy treatment for gynecological cancers, including primary or recurrent vaginal, endometrial, and cervical cancers. This study aims to improve needle placement accuracy in interstitial or intra-cavitary brachytherapy, which is important for delivering adequate radiation doses to tumors while protecting healthy pelvic organs. Currently, there is no standard real-time image guidance for needle insertion in these procedures, which this research seeks to address. The study involves patients receiving gynecological brachytherapy using a device-based approach, where needles and applicators are inserted under general anesthesia with guidance from clinical exams and pre-procedure MRI. An investigational 3D ultrasound device will be used during the procedure to provide real-time volumetric imaging of needle pathways, improving upon the limitations of standard 2D ultrasound. After the procedure, CT scans are performed for radiation planning. Participants will undergo imaging assessments including MRI before treatment and CT after treatment, with the main focus on measuring the accuracy of needle placement over a 16-month period. The study team will evaluate how effectively the 3D ultrasound helps avoid needle insertion into pelvic organs and optimizes tumor dose coverage. Patient safety and treatment monitoring will be conducted alongside these measurements within the study timeline.

3DUS Imaging of Needles in Gynecological Brachytherapy