ESTRO 2023 - Abstract Book

S616

Monday 15 May 2023

ESTRO 2023

Results A traffic light protocol was developed to evaluate positioning scenarios. Comparisons of LF and HF MRI scans proved an overall good registration performance for participants lying in the same position on both scanners (92.3% green light, mean Δ dsb 1.4±0.8 mm). Moreover, different lying positions lead to worse registration performance (52.4% yellow light, mean Δ dsb 2.4±1.6 mm), especially for higher BMI values. Comparisons of LF MRI scans of repositioned arms resulted in excellent registration performance (100% green light, mean Δ dsb 0.6±0.4 mm). Lastly, comparison of HF MRI scans on different body positions demonstrated basically good registration performance (62.5% green light, mean Δ dsb 1.2±0.8 mm), especially for lower BMI values (Table 1).