Výsledky vyhledávání - "Tsutomu Yamakawa"

Identification of breast tissue using the x-ray image measured with an energy-resolved cadmium telluride series detector based on photon-counting technique

Autor: Masahiro Okada, Tsutomu Yamakawa, Shuji Koyama, Megumi Watanabe, Mitsuhiro Mizutani, Yoshie Kodera, Shuichiro Yamamoto, Hiroko Nishide, Ai Nakajima, Hiroaki Hayashi, Mariko Sasaki, Reina Suzuki, Naoko Yoshida, Daisuke Hashimoto

Publikováno v: IWBI

We have been developing a new mammography device with a cadmium-telluride series energy-resolved photon-counting X-ray detector. Using a photon-counting technique, we examined the sensitivity of the system for differentiating the composition of breas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d0553cdd4d547b8cf7f3960666d57993
https://doi.org/10.1117/12.2317819

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Development of energy-resolved photon-counting mammography with a cadmium telluride series detector to reduce radiation exposure and increase contrast-to-noise ratio using the high-energy X-rays

Autor: Shuji Koyama, Ai Nakajima, Tsutomu Yamakawa, Masahiro Okada, Mariko Sasaki, Hiroto Kimura, Daisuke Hashimoto, Shuichiro Yamamoto, Hiroaki Hayashi, Reina Suzuki, Yoshie Kodera

Publikováno v: IWBI

A new energy-resolved photon-counting mammography (ERPCM) device with a cadmium telluride (CdTe) series detector (JOB Corporation, Japan) is currently being developed. The CdTe series detector can detect higher-energy photons with high sensitivity, e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5b037c931a68ea5da3bac3254540b85f
https://doi.org/10.1117/12.2317813

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A proposed new image display method with high contrast-to-noise ratio using energy resolved photon-counting mammography with a CdTe series detector

Autor: Y. Iida, D. Hashimoto, Reina Suzuki, Mariko Sasaki, Shuji Koyama, Tsutomu Yamakawa, Yoshie Kodera, F. Ito, M. Okada, Y. Koshiba, Seiichi Yamamoto, Ai Nakajima

Publikováno v: Medical Imaging 2018: Physics of Medical Imaging.

In this study, we propose a new image display method to obtain high contrast-to-noise ratio (CNR) using energy resolved photon-counting mammography (ERPCM) with a cadmium telluride (CdTe) series detector manufactured by JOB CORPOLATION. The CdTe seri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ea59933b406bb85712acc38a6bdf5479
https://doi.org/10.1117/12.2292871

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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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Detection of microcalcifications and tumor tissue in mammography using a CdTe-series photon-counting detector

Autor: Masahiro Okada, Ai Nakajima, Shuji Koyama, Tsutomu Yamakawa, Akiko Ihori, Hiroko Nishide, Yoshie Kodera, Shuichiro Yamamoto

Publikováno v: Medical Imaging 2017: Physics of Medical Imaging.

In this study, we proposed a method for detecting microcalcifications and tumor tissue using a cadmium telluride (CdTe) series linear detector. The CdTe series detector was used as an energy resolved photon-counting (hereafter referred to as the phot

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7fa08399efb63262f9977247636167d2
https://doi.org/10.1117/12.2253576

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Development of a novel method based on a photon counting technique with the aim of precise material identification in clinical x-ray diagnosis

Autor: Tsutomu Yamakawa, Natsumi Kimoto, Takashi Asahara, Masahiro Okada, Hiroaki Hayashi, Masashi Yamasaki, Yuki Kanazawa, Shuichiro Yamamoto

Publikováno v: Medical Imaging 2017: Physics of Medical Imaging.

A photon counting system has the ability of energy discrimination, therefore obtaining new information using X-rays for material identification is an expected goal to achieve precise diagnosis. The aim of our study is to propose a novel method for ma

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::03ffdd83e4b4deb0904b28e9724bf950
https://doi.org/10.1117/12.2253564

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Response functions of multi-pixel-type CdTe detector: toward development of precise material identification on diagnostic x-ray images by means of photon counting

Autor: Masahiro Okada, Tsutomu Yamakawa, Shuichiro Yamamoto, Yuki Kanazawa, Natsumi Kimoto, Hiroaki Hayashi, Takashi Asahara, Masashi Yamasaki

Publikováno v: Medical Imaging 2017: Physics of Medical Imaging.

Currently, an X-ray imaging system which can produced information used to identify various materials has been developed based on photon counting. It is important to estimate the response function of the detector in order to accomplish highly accurate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4fd10df79680ccbe661d539d620a3297
https://doi.org/10.1117/12.2251185

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Precise material identification method based on a photon counting technique with correction of the beam hardening effect in X-ray spectra

Autor: Hiroaki Hayashi, Shuichiro Yamamoto, Tsutomu Yamakawa, Natsumi Kimoto, Takashi Asahara, Yoshiki Mihara, Masashi Yamasaki, Masahiro Okada, Yuki Kanazawa

Publikováno v: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine. 124

The aim of our study is to develop a novel material identification method based on a photon counting technique, in which the incident and penetrating X-ray spectra are analyzed. Dividing a 40 kV X-ray spectra into two energy regions, the correspondin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::634e5459c440480a635f0f2bd28390e9
https://pubmed.ncbi.nlm.nih.gov/28314161

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Discrimination between normal breast tissue and tumor tissue using CdTe series detector developed for photon-counting mammography

Autor: Masahiro Okada, Tsutomu Yamakawa, Akiko Ihori, Misa Kato, Shuichiro Yamamoto, Ai Nakajima, Chizuru Okamoto, Yoshie Kodera

Publikováno v: SPIE Proceedings.

We propose a new mammography system using a cadmium telluride (CdTe) series photon-counting detector, having high absorption efficiency over a wide energy range. In a previous study, we showed that the use of high X-ray energy in digital mammography

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::75535a2f43ce4ac0193e1bec8f546ca3
https://doi.org/10.1117/12.2216447

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Estimation of mammary gland composition using CdTe series detector developed for photon-counting mammography

Autor: Chizuru Okamoto, Akiko Ihori, Tsutomu Yamakawa, Masahiro Okada, Ai Nakajima, Misa Kato, Yoshie Kodera, Shuichiro Yamamoto

Publikováno v: SPIE Proceedings.

Energy resolved photon-counting mammography is a new technology, which counts the number of photons that passes through an object, and presents it as a pixel value in an image of the object. Silicon semiconductor detectors are currently used in comme

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::59a1ec73e6f2c473d41304ecb4576893
https://doi.org/10.1117/12.2216378

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