ESTRO 2023 - Abstract Book

S1682

Digital Posters

ESTRO 2023

Figure 2 shows that the TGRT technique (if applied) can significantly reduce the existing position error regardless of the treatment site ( p = 6E–5 for whole-brain, p = 1.6E–9 for breasts in free breathing, p = 1.0E–38 for breasts in breath-hold and p = 1.1E–47 overall).

Conclusion The preliminary results of the ongoing clinical study are very promising, suggesting an excellent performance of the TGRT technique in a clinical setting. Validations for additional treatment sites and techniques are work in progress.

PO-1929 A novel parameter to evaluate the dosimetric impact of Gastro-Intestinal gas pockets during MRgRT

M. Nardini 1 , M. Galetto 1 , A. Capotosti 1 , L. Boldrini 2 , G. Chiloiro 2 , A. Romano 2 , A. Bevacqua 2 , G. Turco 2 , R. Moretti 1 , L. Indovina 1 , L. Placidi 1 1 Fondazione Policlinico Universitario ‘‘A. Gemelli’’ IRCCS, UOSD Fisica Medica e Radioprotezione, Roma, Italy; 2 Fondazione Policlinico Universitario ‘‘A. Gemelli’’ IRCCS, UOC Radioterapia Oncologica, Roma, Italy