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EP-1845: The impact of intra-fractional bladder filling on adaptive bladder radiotherapy

A. Krishnan, Y. Tsang, A. Stewart-Lord
2017 Radiotherapy and Oncology  
Purpose or Objective Radiotherapy of bladder carcinoma requires substantial CTV-PTV margins to account for day-to-day bladder volume variations. A method to reduce these margins, and hence organs at risk (OAR) dose, is the Plan of the Day method (PotD). In preparation of a PotD approach, we introduced an offline adaptive radiotherapy (ART) procedure based on ConeBeam CT (CBCT) analysis to select individualized adequate margins for the bladder. Tight PTV margins were defined on a retrospective
more » ... n a retrospective CBCT analysis (N=9, 56 CBCTs) (table 1) .
doi:10.1016/s0167-8140(17)32280-6 fatcat:6elgnjzqrjgfvob3dhykjuqudy