Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Yoshihiko Kumazawa"'
Autor:
Kenji Shimazoe, Hiroyuki Takahashi, Yoshihiko Kumazawa, Tadashi Orita, Boxuan Shi, J. Ooi, Tetsuo Furumiya
Publikováno v:
IEEE Transactions on Nuclear Science. 59:3213-3217
The time over threshold (TOT) method has several advantages over direct pulse height analysis based on analog to digital converters (ADCs). A key advantage is the simplicity of the conversion circuit which leads to a high level of integration and a l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a45e1386952425026d8910a7e0dfe31
https://doi.org/10.1109/tns.2012.2215338
https://doi.org/10.1109/tns.2012.2215338
Autor:
Masatada Tanabe, Yoshihiro Nishiyama, Yuka Yamamoto, Hitoshi Takashima, Toshiaki Kusuhara, Motoomi Ohkawa, Yoshihiko Kumazawa
Publikováno v:
RADIOISOTOPES. 45:369-374
The simultaneous acquisition method in SPECT has some advantages, such as potentially doubling throughput in an examination and halving the acquisition time. However, interradionuclide scattering limits diagnostic accuracy. We evaluated 99mTc and 201
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24f85ff0807a33a2a2739d1dc9955c62
https://doi.org/10.3769/radioisotopes.45.369
https://doi.org/10.3769/radioisotopes.45.369
Autor:
Keishi Kitamura, Tetsuo Furumiya, Masafumi Furuta, Masanobu Satoh, Junichi Ohi, Hiromichi Tonami, Ayako Kawashima, Yoshihiro Yamada, Yoshiyuki Yamakawa, Masayuki Nakazawa, Nobuya Hashizume, Tomoaki Tsuda, Yoshihiko Kumazawa
Publikováno v:
2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC).
For diagnosis of very small lesions of breast cancer on very early stage, a dedicated breast positron emission tomography (PET) scanner consisting of four-layer depth of interaction (DOI) detectors is now under development. We are aiming for the spat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20b8c4677cf1106e781f13b1629efcf1
https://doi.org/10.1109/nssmic.2009.5402027
https://doi.org/10.1109/nssmic.2009.5402027
Autor:
Hiromitsu Takahashi, J. Ooi, Yoshihiko Kumazawa, Kenji Shimazoe, Takeshi Fujiwara, Tetsuo Furumiya
Publikováno v:
2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC).
A Time Over Threshold (TOT) system has advantage over pulse height measurements on its high integrity and low power dissipation because of its binary readout and circuit simplicity. However the relation between TOT and input charge is strongly nonlin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d817afaa8bfdc533eac84a7d48b3a17
https://doi.org/10.1109/nssmic.2009.5402168
https://doi.org/10.1109/nssmic.2009.5402168
Publikováno v:
2008 IEEE Nuclear Science Symposium Conference Record.
We have proposed a new architecture of the clamp amplifier that is one of the important components of analog front-end ASIC (application specific integrated circuits) for high-resolution PET (positron emission tomography) scanner’s data acquisition
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a99541244825752520cf98a2f8d472b0
https://doi.org/10.1109/nssmic.2008.4774849
https://doi.org/10.1109/nssmic.2008.4774849
Autor:
J. Ooi, Hiromitsu Takahashi, Boxuan Shi, Kenji Shimazoe, Yoshihiko Kumazawa, Takeshi Fujiwara
Publikováno v:
2008 IEEE Nuclear Science Symposium Conference Record.
A novel waveform multiplexing method has been proposed to implement mixed-signal design in large multichannel front-end electronics systems. By multiplexing analog channels with decay time modulation, this new approach is able to increase readout cha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ba418c056d8603314c023a599072cc1
https://doi.org/10.1109/nssmic.2008.4774747
https://doi.org/10.1109/nssmic.2008.4774747
Autor:
Junichi Ohi, Masanobu Satoh, Masayuki Nakazawa, Masafumi Furuta, Ayako Kawashima, Keishi Kitamura, Tomoaki Tsuda, Yoshihiko Kumazawa, Tetsuo Furumiya, Yoshihiro Yamada, Yoshiyuki Yamakawa, Nobuya Hashizume, Hiromichi Tonami
Publikováno v:
2008 IEEE Nuclear Science Symposium Conference Record.
For diagnosis of very small lesions of breast cancer on very early stage, a dedicated breast positron emission tomography (PET) scanner consisting of four-layer depth of interaction (DOI) detectors is now under development. We are aiming for the spat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6dfb269b8041274a754e1d39365256f
https://doi.org/10.1109/nssmic.2008.4774517
https://doi.org/10.1109/nssmic.2008.4774517
Autor:
Nobuya Hashizume, Keishi Kitamura, Yosihiro Yamada, Yoshiyuki Yamakawa, Ayako Kawashima, Yoshihiko Kumazawa
Publikováno v:
2008 IEEE Nuclear Science Symposium Conference Record.
With the aim of realizing the early diagnosis of breast cancer, we are promoting the research and development of a high-resolution Positron Emission Mammography (PEM). In order to obtain both high resolution and high sensitivity, this scanner uses fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7abd997f6887c21727a6d23c05a40b19
https://doi.org/10.1109/nssmic.2008.4774391
https://doi.org/10.1109/nssmic.2008.4774391
Autor:
Masanobu Satoh, Tomoaki Tsuda, Yoshihiko Kumazawa, Hiromichi Tonami, Keishi Kitamura, Junichi Ohi
Publikováno v:
2008 IEEE Nuclear Science Symposium Conference Record.
Time-of-flight position emission tomography (TOF-PET) is a promising technique for greatly improving image quality. It is well known that depth of interaction (DOI) information can reduce parallax error and uniform the spatial resolution in whole FOV
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0be63bc180baccf17b0a60820341bc7b
https://doi.org/10.1109/nssmic.2008.4774142
https://doi.org/10.1109/nssmic.2008.4774142
Publikováno v:
2007 IEEE Nuclear Science Symposium Conference Record.
This C-shaped PEM unit currently under development is designed for the very early stage detection of very small lesions, such as breast cancers. This PEM unit's scanner is equipped with 4-layer Depth of Interaction (DOI) detectors, each of which cont
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc23d372ace796f29e89b428b342e94c
https://doi.org/10.1109/nssmic.2007.4437087
https://doi.org/10.1109/nssmic.2007.4437087