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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국의학물리학회 의학물리 의학물리 제32권 제4호
- 발행연도
- 2021.12
- 수록면
- 116 - 121 (6page)
- DOI
- 10.14316/pmp.2021.32.4.116
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초록· 키워드
오류제보하기
Purpose: To investigate the effects of dose rate on intensity-modulated radiation therapy (IMRT) quality assurance (QA).
Methods: We performed gamma tests using portal dose image prediction and log files of a multileaf collimator. Thirty treatment plans were randomly selected for the IMRT QA plan, and three verification plans for each treatment plan were generated with different dose rates (200, 400, and 600 monitor units [MU]/min). These verification plans were delivered to an electronic portal imager attached to a Varian medical linear accelerator, which recorded and compared with the planned dose. Root-mean-square (RMS) error values of the log files were also compared.
Results: With an increase in dose rate, the 2%/2-mm gamma passing rate decreased from 90.9% to 85.5%, indicating that a higher dose rate was associated with lower radiation delivery accuracy. Accordingly, the average RMS error value increased from 0.0170 to 0.0381 cm as dose rate increased. In contrast, the radiation delivery time reduced from 3.83 to 1.49 minutes as the dose rate increased from 200 to 600 MU/min.
Conclusions: Our results indicated that radiation delivery accuracy was lower at higher dose rates; however, the accuracy was still clinically acceptable at dose rates of up to 600 MU/min.
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참고문헌 (20)
참고문헌 신청
Baskar R / 2012 / Cancer and radiation therapy : current advances and future directions / Int J Med Sci 9:193~199
Baumann M / 2020 / What will radiation oncology look like in 2050? A look at a changing professional landscape in Europe and beyond / Mol Oncol. 14:1577~1585
Webb S / 2015 / Intensity-modulated radiation therapy / CRC Press
Bortfeld T / 2006 / IMRT : a review and preview / Phys Med Biol 51:R363~R379
Ezzell GA / 2001 / The overshoot phenomenon in step-and-shoot IMRT delivery / J Appl Clin Med Phys 2:138~148
Baumann M / 2020 / What will radiation oncology look like in 2050? A look at a changing professional landscape in Europe and beyond / Mol Oncol. 14:1577~1585
Webb S / 2015 / Intensity-modulated radiation therapy / CRC Press
Bortfeld T / 2006 / IMRT : a review and preview / Phys Med Biol 51:R363~R379
Ezzell GA / 2001 / The overshoot phenomenon in step-and-shoot IMRT delivery / J Appl Clin Med Phys 2:138~148
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