A new method to visualize and to spare the ureters during SBRT for oligo metastatic patients. (September 2021)

• Record Type: Journal Article
• Authors: Muggeo-Bertin, Emilien; Moeckli, Raphael; Vallet, Veronique; Berthold, Dominik; Godin, Sarah; Bourhis, Jean; Herrera, Fernanda G.
• Is Part Of: Technical innovations & patient support in radiation oncology. Volume 19(2021)
• Page Start: 7
• Page End: 10
• Publication Date: 2021-09
• Subjects: Stereotactic body radiation therapy -- Ureters -- Stenosis -- Delineation -- Constraints -- Urography CT scan; Radiotherapy -- Periodicals; Cancer -- Radiotherapy -- Periodicals; Cancer -- Patients -- Hospital care -- Periodicals; 615.842
• DOI: 10.1016/j.tipsro.2021.05.003
• Languages: English
• ISSNs: 2405-6324

Abstract

Highlights: Ureteral injury following abdominal irradiation may have serious consequences. Urography CT scan is a simple procedure to spare ureters during SBRT. Using a urography CT scan can significantly reduce the dose to the ureters. Abstract: This article describes a ureter-sparing procedure used to treat lymph node metastases with SBRT. We delivered 35 Gy in 5 fractions of 7 Gy to patients with lesions located less than 7 mm from the ureters using a urography CT scan for planification. Two dosimetry plans were created, one using a CT scan urography-based contour and the other using the native phase. PTV coverage were not statistically different but this technique was able to significantly reduce median delivered Dmax to the ureters. These preliminary results demonstrate the feasibility of locating the ureters in a planning CT scan to protect them.