ESTRO 2024 - Abstract Book

S4298

Physics - Intra-fraction motion management and real-time adaptive radiotherapy

ESTRO 2024

Figure 1: (a)Violin plot of Spearman's correlation coefficient (SCC) of the total patient group in LR, AP, SI and total 3D directions. (b) Violin plots of SCC in SI direction in the total patient group and separated into groups of with and without abdominal compression belt.

Conclusion:

The correlation between surface and tumour motion was strong (0.70 < SCC < 1.0) in SI (67% of the patients) and total 3D (73% of the patients) directions. The correlation coefficient varied between patients and the result should be interpreted as an indication of possible further individualisation of treatment and treatment planning. The use of an abdominal compression belt showed statistically significant higher correlation (SCC = 0.79, p < 0.05) in comparison to the group without compression belt (SCC = 0.70). The statistical power can be improved with a larger and more varying patient data set with paired data.

Keywords: correlation, tumour motion, SGRT