Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Gereon Vogtmeier"'
Autor:
Gereon Vogtmeier, Sebastian Schusser, Ewald Rössl, Klaus Engel, Dieter Geller, Gerhard Martens, Thomas Köhler
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 648:S202-S207
A quantitative theory for the contrast-to-noise ratio (CNR) in differential phase contrast imaging (DPCI) is proposed and compared to that of images derived from classical absorption contrast imaging (ACI). Most prominently, the CNR for DPCI contains
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ade28aa2155aa4da0b59e689c747862
https://doi.org/10.1016/j.nima.2010.11.169
https://doi.org/10.1016/j.nima.2010.11.169
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 576:123-127
Aiming at a compact, cost-effective data readout for X-ray CT, a monolithic approach is presented where photosensor and parts of the analog-to-digital converter are located on the same substrate. In a special realization of the ‘digital pixel’, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::696c0a5d78813160674e2c6c3553e3d9
https://doi.org/10.1016/j.nima.2007.01.138
https://doi.org/10.1016/j.nima.2007.01.138
Autor:
Michael P. Appleby, Jill Klinger, Brian E. Harwood, Ralf Dorscheid, Klaus Engel, Bill Randolph, Randy Luhta, Gereon Vogtmeier, Rod Mattson
Publikováno v:
SPIE Proceedings.
The use of two-dimensional, focused, anti-scatter-grids (ASGs) in computed tomography is one essential solution to reduce the scatter radiation for large area detectors. A detailed analysis of the requirements and related image quality aspects lead t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb999aeecf9f063110bb94631cd48c49
https://doi.org/10.1117/12.770063
https://doi.org/10.1117/12.770063
Autor:
Gereon Vogtmeier, Michael Gnade, Armin Kemna, Stefan Eick, Christian Bäumer, Roger Steadman, Dirk Weiler
Publikováno v:
2006 Proceedings of the 32nd European Solid-State Circuits Conference.
A multichannel SigmaDelta-type analog-to-digital converter has been designed for data readout in CT scanners. A test-structure with a 4 times 4 photodetector array has been fabricated in a 0.8 mum CMOS process. Aiming at an integrated solution toward
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16f0e05290e6bdae75d0fc4a2215e4da
https://doi.org/10.1109/esscir.2006.307473
https://doi.org/10.1109/esscir.2006.307473
Publikováno v:
SPIE Proceedings.
In Computed Tomography (CT), the image quality sensitively depends on the accuracy of the X-ray projection signal, which is acquired by a two-dimensional array of pixel cells in the detector. If the signal of X-ray photons is spread out to neighborin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d64974370944b216994f78beb0cd370c
https://doi.org/10.1117/12.654499
https://doi.org/10.1117/12.654499
Publikováno v:
MRS Proceedings. 969
The foremost driver for the development of fully CMOS compatible Through Wafer Interconnects (TWIs) is the need of very large photodiode arrays for detectors, e.g. in computed tomography applications. The front to back-side contact allows the four-si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22716d109474ae77daa06bb8460a64c2
https://doi.org/10.1557/proc-0969-w02-03-v01-03
https://doi.org/10.1557/proc-0969-w02-03-v01-03
In this paper, we show a high dynamic range current-mode detector for computed tomography application. A regulated current mirror structure has been implemented at pixel level that provides with 17 bits dynamic range and a noise floor below 3 pARMS.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70baab626b9f75bc9328f82480c05b48
https://publica.fraunhofer.de/handle/publica/211191
https://publica.fraunhofer.de/handle/publica/211191
Publikováno v:
Polarization: Measurement, Analysis, and Remote Sensing.
A polarimeter system has been developed to investigate the reflected light of very rough non-specular surfaces. One special application is the polarimetric analysis of road surfaces to find features for the classifications relating to type and surfac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7fed05af171c3047169d26a584bf203
https://doi.org/10.1117/12.278960
https://doi.org/10.1117/12.278960
Autor:
Christian Baumer, Stefan Eick, Roger Steadman, Gereon Vogtmeier, Michael Gnade, Armin Kemna, Dirk Weiler
Publikováno v:
2006 Proceedings of the 32nd European Solid-State Circuits Conference; 2006, p432-435, 4p