MR guided applicator reconstruction for brachytherapy of cervical cancer using the novel titanium Rotterdam applicator

Accuracy of applicator tip reconstruction in MRI-guided interstitial 192Ir-high-dose-rate brachytherapy of liver tumors

“…Still the signal voids in the MPR images were relatively broad despite 2.5-mm overlap of the 5.0 mm axial slices. The reconstruction accuracy achieved in our phantom measurements is comparable to those of other phantom accuracy studies employing MRI and CT co-registration [10,11,13].…”

“…The interdependency of signal void diameter and applicator orientation within in the B 0 field seen in our study, has also been described for titanium gynecological BT applicators [10]. Short TE, high receiver bandwidth per pixel, and high in-plane resolution of the MR sequence yielded an in-plane signal void similar in extent to the actual physical diameter of the BT applicator, limiting the probability of in-plane reconstruction error [11].…”

Commissioning of a 3D image‐based treatment planning system for high‐dose‐rate brachytherapy of cervical cancer

“…The GYN GEC‐ESTRO working group provided recommendations for the commissioning and applicator reconstruction of 3D BT planning, but the report lacked details describing titanium applicator commissioning and reconstruction. Titanium applicator reconstruction accuracy validation studies on MRI are still lacking 5 , 42 , 43 . Haack et al (42) presented the pioneering results on testing titanium ring applicators by using phantom and in vivo datasets.…”

Image-Based Brachytherapy for the Treatment of Cervical Cancer

“…Models available include intrauterine catheter and customized vaginal molds; the Fletcher family of gynecological colpostats, including tandem and ovoid systems (later modified for remote afterloading systems by Delclos and Suit); tandem and ring systems pioneered by the Stockholm school; and the Henschke applicator (20)(21)(22)(23)(24). Applicators combined with vaginal cylinder components are also available to extend dosimetric reach to encompass vaginal disease, such as the Miami applicator and Rotterdam applicator (25). For bulky tumors, tumors with lateral parametrial extension, extensive lateral pelvic sidewall involvement, and those with lower vaginal extension, or if cervical os cannot be entered, interstitial needle implantation can optimize dose using the classic Syed-Neblett parametrial butterfly template, rectal template, or Martinez Universal Perineal Interstitial Template (MUPIT) applicator (Elekta, Stockholm, Sweden).…”