20.500.12556/RUL-156054 The importance of additional geometrical verification with auto beam hold function in prostate cancer irradiation This paper aims to determine the need for additional imaging verification when using the auto beam hold function in radiotherapy of prostate cancer patients with inserted gold fiducial markers. Forty patients who underwent irradiation of the prostate and twenty with prostate and pelvic lymph node radiotherapy were included in the retrospective study. Intrafraction shifts during irradiation were compared with the auto beam hold function in the translational directions. The function was used with time tracking (5 seconds), a tolerance limit for marker deviations (4 mm), and bone structures in the large irradiation field (5 mm). The need for additional image verification was higher in the larger irradiation field group. When translational shifts were analysed, a statistically significant difference in the vertical direction was found in the group with only prostate irradiation (p = 0.013). A statistically significant difference in the lateral direction was found in the group with a larger irradiation field (p = 0.021). Translational shifts were not statistically significantly different between the two groups (p > 0.05). Conclusion: Intrafraction shifts of the prostate increase the need for additional imaging verification. The use of the auto beam hold function is effective in reducing errors. prostate cancer radiotherapy intrafraction movement 2-D kV imaging in radiotherapy auto beam hold function true false true Angleški jezik Ni določen Članek v reviji 2024-05-06 08:35:06 2024-05-06 08:35:08 2024-05-07 03:44:58 0000-00-00 00:00:00 2023 0 0 Str. 301-306 no. 4 Vol. 38 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 616-073:616-006 1451-3994 10.2298/NTRP2304301S 194385667 Zager_Marcius2023_4.pdf Zager_Marcius2023_4.pdf 1 7C27DCBD0D91C839FDB53B1793FB7CC9 4f40f7de0f48db3b418461bfb90c437023b76493750786d81a5bf90a9c718191 fec78aae-0b72-11ef-ab55-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=183265 RAZ_Salmic_Klemen_2023.pdf RAZ_Salmic_Klemen_2023.pdf 1 337931057E01F31E8D3A451B3043E700 b10c1aeac6f4c9d799a0d8e7c82c3386fec457b2822cc13331f0e873a76d721e c90f45e4-0b72-11ef-ab55-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=183264 Zdravstvena fakulteta 0 0 0