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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국의학물리학회 의학물리 의학물리 제32권 제4호
- 발행연도
- 2021.12
- 수록면
- 179 - 184 (6page)
- DOI
- 10.14316/pmp.2021.32.4.179
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초록· 키워드
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This study aimed to determine the optimal thickness of the active layer and scan mode for a flexible radiochromic film (F-RCF) based on the active lithium salt of pentacosa-10,12-diynoic acid (LiPCDA). F-RCFs of 90, 120, 140, and 170-μm thickness were fabricated using LiPCDA. Several pieces of the F-RCFs were exposed to doses ranging from 0 to 3 Gy. Transmission and reflection modes were used to scan the irradiated F-RCFs. Their dose-response curves were obtained using a second-order polynomial equation. Their sensitivity was evaluated for both scanning modes, and the uniformity of the batch was also examined. For both the transmission and reflection modes, the sensitivity increased as the film thickness increased. For the reflection mode, the dose response increased dramatically under 1 Gy. The value of the net optical density varied rapidly as the thickness of the film increased. However, the dose-response curves showed a supralinear-curve relationship at doses greater than 2 Gy. The sensitivity of the reflection scan at doses greater than 2 Gy was higher than that of the reflection scan within 0?2 Gy. The sensitivity steadily decreased with increasing doses, and the sensitivity of the two modes was within 0.1 to 0.2 at 2 Gy and was saturated beyond that. For the transmission scan, the sensitivity was approximately 0.2 at 3 Gy. For the intra-batch test result, the maximum net optical density difference of the intra-batch was 5.5% at 2 Gy and 7.4% at 0.2 Gy in the transmission and reflection scans, respectively. In the low-dose range, film thickness of more than 120-μm was proper in the transmission mode. In contrast, the transmission mode showed a better result compared to the reflection mode. Therefore, the proper scan mode should be selected according to the dose range.
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참고문헌 (12)
참고문헌 신청
Chu RDH / 1990 / GafChromicTM Dosimetry Media : a new high dose, thin film routine dosimeter and dose mapping tool / Radiat Phys Chem 35:767~773
Collins C / 2019 / An investigation of a novel reusable radiochromic sheet for 2D dose measurement / Med Phys 46:5758~5769
Casanova Borca V / 2013 / Dosimetric characterization and use of GAFCHROMIC EBT3 film for IMRT dose verification / J Appl Clin Med Phys 14:4111
McLaughlin WL / 1991 / Sensitometry of the response of a new radiochromic film dosimeter to gamma radiation and electron beams / Nucl Instrum Methods Phys Res 302:165~176
Rink A / 2008 / Temperature and hydration effects on absorbance spectra and radiation sensitivity of a radiochromic medium / Med Phys 35:4545~4555
Collins C / 2019 / An investigation of a novel reusable radiochromic sheet for 2D dose measurement / Med Phys 46:5758~5769
Casanova Borca V / 2013 / Dosimetric characterization and use of GAFCHROMIC EBT3 film for IMRT dose verification / J Appl Clin Med Phys 14:4111
McLaughlin WL / 1991 / Sensitometry of the response of a new radiochromic film dosimeter to gamma radiation and electron beams / Nucl Instrum Methods Phys Res 302:165~176
Rink A / 2008 / Temperature and hydration effects on absorbance spectra and radiation sensitivity of a radiochromic medium / Med Phys 35:4545~4555
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