西上 莉奈

論文

• Impact of correcting beam hardening and detector response function in photon-counting X-ray imaging when using anti-coincidence mode

  Hiroaki Hayashi, Rina Nishigami, Daiki Kobayashi, Takuya Kasue, Natsumi Kimoto, Takashi Asahara

  Nuclear Engineering and Technology 2027年1月
• An algorithm to calculate physical density of biomedical objects having 3 ≤ Zeff ≤ 20: an application study using clinical photon-counting computed tomography equipment

  Hiroaki Hayashi, Rina Nishigami, Takashi Asahara, Natsumi Kimoto, Daiki Kobayashi, Mana Mitani, Noriaki Akagi, Fumiyo Higaki, Toshihiro Iguchi

  Applied Radiation and Isotopes 2026年10月 査読有り
• Potential of quantitative X‐ray imaging from photon‐counting CT: A novel analysis based on effective atomic number and physical density

  Takashi Asahara, Rina Nishigami, Natsumi Kimoto, Mana Mitani, Yusuke Morimitsu, Noriaki Akagi, Fumiyo Higaki, Toshihiro Iguchi, Takao Hiraki, Hiroaki Hayashi

  Journal of Applied Clinical Medical Physics 2026年7月 査読有り
• Counting loss correction algorithm for an energy-resolving photon-counting detector for X-ray imaging of biological objects with effective atomic numbers between 3 and 20

  Natsumi Kimoto, Rina Nishigami, Takashi Asahara, Yuki Kanazawa, Akitoshi Katsumata, Shuichiro Yamamoto, Hiroaki Hayashi

  Radiation Physics and Chemistry 2026年6月 査読有り
• A novel wearable dosimeter system that can analyze the incident direction of X-rays for medical dosimetry – Improvements to the detector arrangements and analysis algorithm –

  Takashi Asahara, Rina Nishigami, Daiki Kobayashi, Natsumi Kimoto, Sota Goto, Kazuki Takegami, Rin Ishii, Mana Mitani, Mitsugi Honda, Toshihiro Iguchi …

  Radiation Measurements 2026年2月 査読有り
• Experimental approach of internal dose map visualization during helical CT examinations: importance of X-ray incident direction analysis and central internal dose estimation

  Hiroaki Hayashi, Kazuki Takegami, Rina Nishigami, Daiki Kobayashi, Sota Goto, Takashi Asahara, Natsumi Kimoto, Masaki Takemitsu, Rin Ishii, Shinichi Morimoto …

  Radiation Measurements 2026年2月 査読有り
• Helical X-ray tube trajectory estimation via image noise analysis for enhanced CT dosimetry

  Tatsuya Maeda, Kazuki Takegami, Sota Goto, Takashi Asahara, Daiki Kobayashi, Rina Nishigami, Natsumi Kimoto, Kazuta Yamashita, Kosaku Higashino, Shinichi Morimoto …

  Radiation Physics and Chemistry 2026年2月 査読有り
• Counting-loss correction procedure of X-ray imaging detectors with consideration for the effective atomic number of biological objects

  Natsumi Kimoto, Rina Nishigami, Daiki Kobayashi, Tatsuya Maeda, Takashi Asahara, Sota Goto, Yuki Kanazawa, Akitoshi Katsumata, Shuichiro Yamamoto, Hiroaki Hayashi

  Radiation Physics and Chemistry 2026年2月 査読有り
• Bone-enhanced high contrast X-ray images derived from attenuation estimation related to ultra-low energy X-rays – An application of an energy-resolving photon-counting detector (ERPCD)

  Rina Nishigami, Natsumi Kimoto, Takashi Asahara, Tatsuya Maeda, Daiki Kobayashi, Sota Goto, Tomonobu Haba, Yuki Kanazawa, Shuichiro Yamamoto, Hiroaki Hayashi

  Radiation Physics and Chemistry 2026年1月 査読有り筆頭著者
• Impact of different X-ray tube positions on actual dose measurements during CT examinations -An effect of patient physique-

  Hiroaki Hayashi, Tatsuya Maeda, Kazuki Takegami, Sota Goto, Takashi Asahara, Natsumi Kimoto, Rina Nishigami, Daiki Kobayashi, Yuki Kanazawa, Kazuta Yamashita …

  Radiation Physics and Chemistry 2025年12月 査読有り
• Applicability of Effective Atomic Number (Z eff) Image Analysis of Coronary Plaques Measured With Photon- Counting Computed Tomography

  Takashi Asahara, Mana Mitani, Natsumi Kimoto, Rina Nishigami, Kazuki Takegami, Yusuke Morimitsu, Noriaki Akagi, Toru Miyoshi, Yuki Kanazawa, Toshihiro Iguchi …

  Investigative Radiology 2025年9月22日 査読有り
• A novel analytic procedure for accurate patient surface dose measurement during computed tomography examination: Systematic uncertainty correction related to incident X-ray direction

  Sota Goto, Tatsuya Maeda, Kazuki Takegami, Rina Nishigami, Daiki Kobayashi, Takashi Asahara, Natsumi Kimoto, Yuki Kanazawa, Kazuta Yamashita, Kosaku Higashino …

  Radiation Physics and Chemistry 2025年5月 査読有り
• Optimization of energy windows to calculate quantitative X-ray images using an energy-resolving photon-counting detector: A simulation study

  Rina Nishigami, Daiki Kobayashi, Natsumi Kimoto, Takashi Asahara, Tatsuya Maeda, Tomonobu Haba, Yuki Kanazawa, Shuichiro Yamamoto, Hiroaki Hayashi

  Radiation Physics and Chemistry 2025年4月 査読有り筆頭著者
• Helpfulness of effective atomic number image in forensic dental identification: Photon-counting computed tomography is suitable

  Takashi Asahara, Shunsuke Okada, Hiroaki Hayashi, Tatsuya Maeda, Rina Nishigami, Daiki Kobayashi, Chihiro Kurose, Natsumi Kimoto, Sota Goto, Miki Hisatomi …

  Computers in Biology and Medicine 2025年1月 査読有り
• A suitable procedure of dose reduction factor measurements of X-ray shields during computed tomography examination - The importance of considering positional changes of an X-ray tube

  Hiroaki Hayashi, Tatsuya Maeda, Kazuki Takegami, Rina Nishigami, Daiki Kobayashi, Takashi Asahara, Sota Goto, Natsumi Kimoto, Yuki Kanazawa, Kazuta Yamashita …

  Radiation Physics and Chemistry 2024年9月 査読有り
• Effectiveness of an X-ray shielding sheet with lower shielding ability to enable both bone mineral density determination and morphological diagnosis

  Tatsuya Maeda, Hiroaki Hayashi, Miku Ando, Rina Nishigami, Daiki Kobayashi, Takashi Asahara, Sota Goto, Natsumi Kimoto, Kazuki Takegami, Kazuta Yamashita …

  Radiation Measurements 2024年8月 査読有り
• Evaluation of lower detection limit and performance analyses related to the incident angle of X-rays and absolute dose using a triple-type dosimeter

  Takashi Asahara, Hiroaki Hayashi, Tatsuya Maeda, Daiki Kobayashi, Rina Nishigami, Sota Goto, Miku Ando, Natsumi Kimoto, Yuki Kanazawa, Kazuta Yamashita

  Radiation Measurements 2024年7月 査読有り
• A blurring correction method suitable to analyze quantitative x-ray images derived from energy-resolving photon counting detector

  Daiki Kobayashi, Hiroaki Hayashi, Rina Nishigami, Tatsuya Maeda, Takashi Asahara, Yuki Kanazawa, Akitoshi Katsumata, Natsumi Kimoto, Shuichiro Yamamoto

  Physics in Medicine & Biology 2024年4月7日 査読有り
• Performance of elastic x‐ray shield made by embedding Bi₂O₃ particles in porous polyurethane

  Tatsuya Maeda, Hiroaki Hayashi, Miku Ando, Daiki Kobayashi, Rina Nishigami, Takashi Asahara, Sota Goto, Cheonghae Lee, Kazuta Yamashita, Kosaku Higashino …

  Medical Physics 2024年2月 査読有り
• A wearable active-type X-ray dosimeter having novel functions to derive both incident direction and absolute exposure dose

  Takashi Asahara, Hiroaki Hayashi, Tatsuya Maeda, Sota Goto, Daiki Kobayashi, Rina Nishigami, Cheonghae Lee, Miku Ando, Yuki Kanazawa, Satoshi Imajo …

  Radiation Physics and Chemistry 2023年7月 査読有り