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KMID : 1164220150270020115
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Journal of Korean Society for Radiotherapeutic Technology
2015 Volume.27 No. 2 p.115 ~ p.122
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Evaluation of the accuracy of the HexaPOD evo RT system using Non-coplanar beams in lung cancer
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Chang Se-Wuk
Cho Kang-Chul
Lee Sang-Kyu
Kim Joo-Ho
Cho Jeong-Hee
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Abstract
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Purpose : The aim of this study, evaluate the accuracy of HeaxPOD evo RT system using the non-coplanar beam.
Materials and Methods : 13 treatment plans are used which applied non-coplanar beams and 10 treatment plans which
coplanar beams are used. the correction value what adjust to 6D couch is determined by each patient’s setup errors only
rotation direction. The study executed followings. first, Applying the correction value, measure the point dose and calculate the γ-index(γ=3% / 3 mm , γ=2%/ 2 mm). second, acquire data as previous methods without correction by HexaPOD.
Results : For comparing the two results, we find out the more precise applying HexaPOD by point dose 0.2% in coplanar and non-coplanar. in the case of γ-index<1(γ=3% / 3 mm), more precise 2.2% in coplanar and 7% in Non-coplanar. Particularly, γ-index<1(2% / 2 mm) show the difference 9.2% in coplanar and 15.1% non-coplanar between apply HexaPOD and dose not apply HexaPOD.
Conclusion : Using the HexaPOD is more precise than without HexaPOD. It suggests that HexaPOD evo RT system is very
useful for precise and high dose delivery.
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KEYWORD
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HeaxPOD, Non-coplanar, 6D couch
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