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Adaptive Radiotherapy for Bladder Cancer – A Review
Journal article   Open access   Peer reviewed

Adaptive Radiotherapy for Bladder Cancer – A Review

Jennifer Livschitz, Hefei Liu, David Schaal and Sushil Beriwal
European medical Journal. Urology, pp 2-13
05 Jan 2024
url
https://doi.org/10.33590/emjurol/10302942View
Published, Version of Record (VoR)CC BY-NC V4.0 Open

Abstract

Radiotherapy plays an important role in organ preservation for bladder cancer. Delivering radiation accurately can be challenging, in part because the bladder and surrounding organs may change position, volume, and shape between and during the fractions of a treatment course. This variability has been accounted for by increasing the margins around the treatment targets, which can expose more normal tissue to radiation, and increase the likelihood of normal tissue complications. An alternative strategy is to alter, or adapt, the radiotherapy treatment plan to account for such inter-fraction changes, a strategy termed ‘adaptive radiotherapy’ (ART). ART allows smaller target volumes to be treated, and may reduce complications. Approaches to ART include offline adaptation strategies and online strategies, which includes choosing a plan of the day (PoD) based on pre-treatment imaging and magnetic resonance (MR), or with cone-beam CT (CBCT)-guided daily plan re-optimisation. Here, the authors review these ART strategies and trials exploring the dosimetric and clinical benefits of ART relative to non-ART bladder radiotherapy.

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