@article{oai:repo.qst.go.jp:00081606,
 author = {Hyun Lee, Sung and Mizushima, Kota and Kohno, Ryosuke and Iwata, Yoshiyuki and Yonai, Shunsuke and Shirai, Toshiyuki and A Pan, Vladimir and Bolst, David and T Tran, Linh and B Rosenfeld, Anatoly and Suzuki, Masao and Inaniwa, Taku and Sung-Hyun, Lee and Kota, Mizushima and Ryosuke, Kohno and Yoshiyuki, Iwata and Shunsuke, Yonai and Toshiyuki, Shirai and Masao, Suzuki and Taku, Inaniwa},
 issue = {4},
 journal = {Physics in medicine and biology},
 month = {Dec},
 note = {In this study, the survival fraction (SF) and relative biological effectiveness (RBE) of pancreatic cancer cells exposed to spread-out Bragg peak (SOBP) helium, carbon, oxygen, and neon ion beams are estimated from the measured microdosimetric spectra using a microdosimeter and the application of the microdosimetric kinetic (MK) model. To measure the microdosimetric spectra, a 3D mushroom silicon-on-insulator (SOI) microdosimeter connected to low noise readout electronics (MicroPlus probe) was used. The parameters of the MK model were determined for pancreatic cancer cells such that the calculated SFs reproduced previously reported in vitro SF data. For a cuboid target of 10×10×6 cm, treatment plans of helium, carbon, oxygen, and neon ion beams were designed using in-house treatment planning software (TPS) to achieve a 10% SF of pancreatic cancer cells throughout the target. The physical doses and microdosimetric spectra of the planned fields were measured at different depths in polymethyl methacrylate (PMMA) phantoms. The biological effects, such as SF, RBE, and RBE-weighted dose at different depths along the fields were predicted from the measurements. The predicted SFs at the target region were generally in good agreement with the planned SF from the TPS in most cases.},
 title = {Estimating the biological effects of helium, carbon, oxygen, and neon ion beams using 3D silicon microdosimeters},
 volume = {66},
 year = {2020}
}