@misc{oai:repo.qst.go.jp:00064336,
 author = {Matsuzaki, Yuka and Fujii, Keisuke and Tsuruoka, Ichirou and Kumagai, Motoki and Mori, Shinichiro and 松崎 有華 and 藤井 啓輔 and 鶴岡 伊知郎 and 熊谷 始紀 and 森 慎一郎},
 month = {Oct},
 note = {Current radiotherapy including photon and particle beams gives prescribed dose preciously, however, intrafractional
organ motion is still basic problem in thoracic and abdominal treatment. To solve this, the advantage of 4DCT to
quantify organ motion is beyond the conventional 3DCT ability. As a result, local control probability could be
improved. The patient will get a significantly inferior treatment with greater complications without 4DCT for tumor
localization, albeit that, it is important to clarify the radiation dose from 4DCT. Here we quantified the radiation dose
using the anthropomorphic phantom in helical 4DCT scan. TLDs are inserted into the phantom anatomical positions.
For thoracic and abdomen scan, the effective doses were 33.1 mSv and 27.5 mSv, respectively. The phantom received a
few mSv of the X-ray scattering over the scan region, head and upper lobe of the lung as an example. The exposure
dose from 4DCT scan is a little bit higher than that from multi-phase contrast, The 6th Japan-Korea Joint Meeting on Medical Physics and The 11th Asia Oceania Congress of Medical Physics},
 title = {Quantitative Radiation Dose Assessment in Helical Four-Dimensional CT forThoracic and Abdominal Radiotherapy},
 year = {2011}
}