Mid-range Probing—Towards Range-Guided Particle Therapy

Abstract

translational shifts were 0.12 AE 0.00, 0.16 AE 0.01 and 0.09 AE 0.00 mm, respectively. The average calculated distance shift for these patients was 0.26 AE 0.01 mm. The average absolute pitch, roll and yaw rotational shifts for these patients were 0.14 AE 0.01, 0.10 AE 0.00 and 0.13 AE 0.00 degrees, respectively. The two patient groups demonstrate no statistically significant difference in the translational or rotational intra-fractional shifts. Conclusion: Our analysis revealed no correlation between pain relief outcome and the amount of intra-fractional shift in all six dimensions during frameless IGRS. Our results indicate the less than 0.5 mm nominal mechanical deviation during frameless IGRS does not impact on TGN pain outcome.