Development and characterization of optical readout well-type glass gas electron multiplier for dose imaging in clinical carbon beams |
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| Affiliation: | 1. National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan;2. National Institute of Radiological Sciences (NIRS), National Institutes for Quantum and Radiological Science and Technology (QST), 4-9-1 Anagawa, Inage-ku, Chiba-shi, Chiba 263-8555, Japan;3. Institute of Engineering Innovation, School of Engineering, The University of Tokyo, 7-3-1 Bunkyo, Tokyo 113-8656, Japan;4. Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motoka, Nishi, Fukuoka 819-0395, Japan;5. Department of Radiological Technology, Faculty of Fukuoka Medical Technology, Teikyo University, 6-22 Misaki, Omuta, Fukuoka 836-8505, Japan;6. Department of Radiological Sciences, Tokyo Metropolitan University, 7-2-10 Higashi-Ogu, Arakawa, Tokyo 116-8551, Japan;7. Research Institute of Electronics, Shizuoka University, Johoku 3-5-1, Naka-ku, Hamamatsu 432-8011, Japan;1. Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea;2. Impurity and Edge Plasma Research Center, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea;3. ENEA Unità Tecnica Fusione, Via E. Fermi, 45, 00044 Frascati Roma, Italy;4. Istituto Nazionale di Fisica Nucleare, Via E. Fermi, 40, 00044 Frascati Roma, Italy;5. National Fusion Research Institute, 169-148 Gwahak-ro, Yuseong-gu, Daejeon 34133, Republic of Korea;1. Space Science Centre (ANGKASA), Institute of Climate Change (IPI), Universiti Kebangsaan Malaysia, Malaysia;2. Department of Physics, Payame Noor University (PNU), P.O. Box 19395-4697, Tehran, Iran;3. Department of Nuclear Engineering, Faculty of Modern Sciences and Technologies, Graduate University of Advanced Technology, Kerman, Iran;4. Centre for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, 47500, Bandar Sunway, Selangor, Malaysia;5. Department of General Educational Development, Faculty of Science and Information Technology, Daffodil International University, DIU Rd, Dhaka, 1341, Bangladesh |
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| Abstract: | The use of carbon ion beams in cancer therapy (also known as hadron therapy) is steadily growing worldwide; therefore, the demand for more efficient dosimetry systems is also increasing because daily quality assurance (QA) measurements of hadron radiotherapy is one of the most complex and time consuming tasks. The aim of this study is to develop a two-dimensional dosimetry system that offers high spatial resolution, a large field of view, quick data response, and a linear dose–response relationship.We demonstrate the dose imaging performance of a novel digital dose imager using carbon ion beams for hadron therapy. The dose imager is based on a newly-developed gaseous detector, a well-type glass gas electron multiplier. The imager is successfully operated in a hadron therapy facility with clinical intensity beams for radiotherapy. It features a high spatial resolution of less than 1 mm and an almost linear dose–response relationship with no saturation and very low linear-energy-transfer dependence. Experimental results show that the dose imager has the potential to improve dosimetry accuracy for daily QA. |
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| Keywords: | Hadron therapy QA Carbon beam Dose imaging GEM Glass GEM |
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