Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Geert Jan Laanstra"'
Publikováno v:
IET Image Processing, Vol 16, Iss 5, Pp 1280-1292 (2022)
Abstract In this paper, new insights in the near infrared imaging process used in finger‐vein recognition by developing a physical model are presented. A realistic phantom finger that mimics the living human finger and also includes veins has been
Externí odkaz:
https://doaj.org/article/8390401739b4432ea8f2734493bd772b
Publikováno v:
Atmosphere, Vol 14, Iss 3, p 529 (2023)
Systems for atmospheric research and wireless communication use the High Frequency (HF) radio spectrum. At these frequencies, typically up to 20 MHz, the ambient electromagnetic noise is stronger than the noise generated by the receiver itself, there
Externí odkaz:
https://doaj.org/article/0515b721fd5c455e8a4bcfa7ba696d79
Publikováno v:
Sensors, Vol 19, Iss 11, p 2616 (2019)
This article describes the design and validation of deployable low-power probes and sensors to investigate the influence of the ionosphere and the Earth’s magnetic field on radio wave propagation below the plasma frequency of the ionosphere, known
Externí odkaz:
https://doaj.org/article/ce3a027f639249ef9e174b963b5b314e
Autor:
Wietske, Woliner-van der Weg, Laura N, Deden, Antoi P W, Meeuwis, Maaike, Koenrades, Laura H C, Peeters, Henny, Kuipers, Geert Jan, Laanstra, Martin, Gotthardt, Cornelis H, Slump, Eric P, Visser
Publikováno v:
EJNMMI Physics
Background Quantitative single photon emission computed tomography (SPECT) is challenging, especially for pancreatic beta cell imaging with 111In-exendin due to high uptake in the kidneys versus much lower uptake in the nearby pancreas. Therefore, we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::3da7158f27f5aac2848e74c41050a05d
https://pubmed.ncbi.nlm.nih.gov/27928774
https://pubmed.ncbi.nlm.nih.gov/27928774
Autor:
Henk J. Meulenbrugge, Cornelis H. Slump, Geert-Jan Laanstra, Pieter W. van Dijk, Rudolf Kemner, Mark A. Boer, Alex G. J. Nijmeijer, Ruud M. Snoeren, Henny Kuipers
Publikováno v:
SPIE Proceedings.
In reference 1 we have presented the principle of an X-ray detector based upon a screen coupled to an array of multiple CCD sensors. In reference 2 we focus on the characterization of the image quality: resolution (MTF) and noise behavior in the over
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d1a6871fdb78b0b8de283ac70742620
https://doi.org/10.1117/12.317042
https://doi.org/10.1117/12.317042
Autor:
Ruud M. Snoeren, Henny Kuipers, Mark J. Bentum, Geert-Jan Laanstra, Rudolf Kemner, Mark A. Boer, Henk J. Meulenbrugge, Alex G. J. Nijmeijer, Cornelis H. Slump
Publikováno v:
SPIE Proceedings.
We have presented the principle of an x-ray detector based upon a screen coupled to an array of multiple CCD sensors. We now focus on the characterization of the image quality: resolution (MTF) and noise behavior in the overlap area. Simple low F len
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97799fc0f82f33c20b6d13dffbdc37f5
https://doi.org/10.1117/12.274026
https://doi.org/10.1117/12.274026
Autor:
Mark J. Bentum, Geert-Jan Laanstra, Rudolf Kemner, Ruud M. Snoeren, Henk J. Meulenbrugge, Cornelis H. Slump, Henny Kuipers, Alex G. J. Nijmeijer, Mark A. Boer
Publikováno v:
Medical Imaging 1996: Physics of Medical Imaging.
In this contribution we propose an alternative x-ray detector based upon multiple screen-CCD sensor combinations. The impinging x-ray quanta are detected by a scintillator screen (e.g. CsI) and converted to light photons (typ. 1200 photons per absorb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::975fac29a78a62e817dd07a9a32ffdca
https://doi.org/10.1117/12.237807
https://doi.org/10.1117/12.237807