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KMID : 1164220160280010027
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Journal of Korean Society for Radiotherapeutic Technology
2016 Volume.28 No. 1 p.27 ~ p.34
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After retrospective evaluation of the SETUP rate change during the treatment of head and neck cancer patient with Helical Tomotherapy
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Ha Tae-Young
Kim Seung-Jun
Hwang Chul-Hyan
Sohn Jong-Gi
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Abstract
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Purpose : Retrospective evaluation of setup changes using the corrected position during helical tomotherapy Materials and
Methods : Head and neck cancer patients were randomly sampled and summarized into 3 groups: Group 1(32) Brain, Group 2 2(28)Maxillar, Nasal cavity, Group 3 (35) Nasopharynx(NPX), Tongue, Tonsil, and Oropharynx(OPX). In 3 groups, the statistical tests based on repeated measurements among 30 times of the duration of treatment by applying X, Y, Z axis errors, roll, weight changes, and vectors as variables.
Results : The statistical test results showed that there was no difference between x-axis (p = 0.458) and y-axis (p=0.986) and in roll (p = 0.037), weight change (p <0.001), and the vector (p <0.001). In addition, the pattern between the three groups based on the fraction revealed no difference in x-axis (p = 0.430) and roll (p = 0.299) but a difference in y-axis (.023), weight change (p = 0.001), and vector (p = 0.028).
Conclusion : The results of the retrospective evaluation found the change in the group 3 with respect Y, Z, weight, and vector and a larger random error during the treatment including low neck.
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KEYWORD
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H&N cancer, Tomotherapy, Retrospective evaluation
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