Výsledky vyhledávání

A disposable OSL dosimeter for in vivo measurement of rectum dose during brachytherapy

Autor: Tohru Okazaki, Takashi Asahara, Yuki Kanazawa, Kanako Sakuragawa, Hitoshi Ikushima, Takuya Hashizume, Hiroaki Hayashi, Emi Tomita, Sota Goto, Tatsuya Maeda, Yasufumi Shitakubo, Natsumi Kimoto

Publikováno v: Medical Physics. 48:4621-4635

Purpose We aimed to develop a disposable rectum dosimeter and to demonstrate its ability to measure exposure dose to the rectum during brachytherapy for cervical cancer treatment using high-dose-rate 192 Ir. Our rectum dosimeter measures the dose wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::46c465b5d54f421c59553ed29dbffd40
https://doi.org/10.1002/mp.14857

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Exposure dose measurement during diagnostic pediatric X-ray examination using an optically stimulated luminescence (OSL) dosimeter based on precise dose calibration taking into consideration variation of X-ray spectra

Autor: Takuya Hashizume, Akitoshi Katsumata, Takashi Asahara, Kazuta Yamashita, Hiroaki Hayashi, Yoshiki Mihara, Tohru Okazaki, Yuki Kanazawa, Takumi Asakawa, Natsumi Kimoto, Emi Tomita, Sota Goto, Kosaku Higashino

Publikováno v: Radiation Measurements. 119:209-219

When dosimetry is performed in actual clinical situations using diagnostic X-rays, the energy dependence of the dosimeter should be taken into consideration. Although the dosimeter is calibrated with standard X-rays, it is unclear whether this dosime

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9ca560c76e76398940ab09431750d188
https://doi.org/10.1016/j.radmeas.2018.10.007

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Change of coagulation after NovoSeven® use for bleeding during cardiac surgery

Autor: Emi Tomita, Keiichi Tajima, Yoshihiro Suematsu, Hajime Takase

Publikováno v: Asian Cardiovascular and Thoracic Annals. 25:99-104

Objectives Recombinant activated factor VII has been used for the treatment of hemophilia, factor VII deficiency, and Glanzmann’s thrombasthenia. Off-label uses have recently been increasing, and there are reports that recombinant activated factor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97cf865b2e47def464944355dc8da0f0
https://doi.org/10.1177/0218492317689901

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An idea to reduce angular dependence of dosimeter having a disk-shaped detection region

Autor: Natsumi Kimoto, Takumi Asakawa, Emi Tomita, Tohru Okazaki, Hiroaki Hayashi, Kazuki Takegami, Takashi Asahara, Sota Goto, Takuya Hashizume, Yuki Kanazawa

Publikováno v: Radiation Measurements. 137:106323

When dose measurement is carried out using an optically stimulated luminescence (OSL) dosimeter having a disk-shaped sensitivity element during diagnostic X-ray examination, the angular dependence of the dosimeter should be taken into consideration.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::39ae0eb55916f1c1d479279ec0c57c42
https://doi.org/10.1016/j.radmeas.2020.106323

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Reproduction of response functions of a multi-pixel-type energy-resolved photon counting detector while taking into consideration interaction of X-rays, charge sharing and energy resolution

Autor: Shuichiro Yamamoto, Natsumi Kimoto, Emi Tomita, Masashi Yamasaki, Takashi Asahara, Yuki Kanazawa, Masahiro Okada, Hiroaki Hayashi, Sota Goto

Publikováno v: 2018 IEEE Nuclear Science Symposium and Medical Imaging Conference Proceedings (NSS/MIC).

Energy-resolved photon counting detectors (ERPCD) are currently being developed for medical application. It is hoped that these detectors can be used for deriving precise material information. When used for that purpose, many researchers are concerne

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8fbb2eac0206d2c7500e0f5517d0d1a0
https://doi.org/10.1109/nssmic.2018.8824417

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Novel material identification method using three energy bins of a photon counting detector taking into consideration Z-dependent beam hardening effect correction with the aim of producing an X-ray image with information of effective atomic number

Autor: Emi Tomita, Hiroaki Hayashi, Masahiro Okada, Daisuke Hashimoto, Tsutomu Yamakawa, Yuki Kanazawa, Shuichiro Yamamoto, Masashi Yamasaki, Takashi Asahara, Yoshiki Mihara, S. Goto, Natsumi Kimoto

Publikováno v: 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC).

Energy resolved photon counting detectors have been developed and currently in use, we have proposed practical methods for producing an X-ray image having effective atomic number information by means of plain X-ray diagnosis. An effective atomic numb

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3d77d6a2713429440e5116c77869fa91
https://doi.org/10.1109/nssmic.2017.8533059

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Necessity of Direct Dose Measurement during Current X-ray Diagnosis

Autor: Yoshiki Mihara, Takuya Hashizume, Emi Tomita, Vergil Lorenzo E. Cruz, Yuki Kanazawa, Hiroaki Hayashi, Kazuki Takegami, Sota Goto, Tohru Okazaki

Publikováno v: Medical Research Archives. 5

During current medical X-ray diagnosis, an automatic exposure control system is widely used. The system can provide proper X-ray exposure, which varies by the patients physical type. It is difficult to measure exposure dose using a traditional dosime

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ef3ec5d5b0777e95ea81451d72caeac2
https://doi.org/10.18103/mra.v5i2.1030

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