Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Ivan P. Mollov"'
Autor:
J. Michael Yu, Arundhuti Ganguly, Richard E. Colbeth, Tom Simak, P. Gerhard Roos, Steven Freestone, Ivan P. Mollov, Donald Hondongwa
Publikováno v:
Medical Imaging 2018: Physics of Medical Imaging.
A new high dynamic range CMOS x-ray detector is described. This sensor was designed specifically for x-ray imaging as opposed to the common approach of modifying a 3T optical sensor design. This allowed for a highly linear, wide dynamic range operati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c2cf7b4fd7f76458ba23fd1fc8263fc
https://doi.org/10.1117/12.2293771
https://doi.org/10.1117/12.2293771
Autor:
Pieter Gerhard Roos, Ivan P. Mollov, Richard E. Colbeth, Isaias D. Job, Fred Zoghi, Carlo Tognina, Chris Webb, Keith Gray, Nima Taie-Nobraie, John Pavkovich
Publikováno v:
SPIE Proceedings.
The focus of this work was to improve the DQE performance of a full-field digital mammography (FFDM) system by means of selecting an optimal X-ray tube anode-filter combination in conjunction with an optimal scintillator configuration. The flat panel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b1790a62e52a865b61b1b963dc23e46
https://doi.org/10.1117/12.911795
https://doi.org/10.1117/12.911795
Publikováno v:
SPIE Proceedings.
Digital flat panel a-Si x-ray detectors can exhibit image lag of several percent. The image lag can limit the temporal resolution of the detector, and introduce artifacts into CT reconstructions. It is believed that the majority of image lag is due t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e31f8d678da604b8c894ebb5ef6a4210
https://doi.org/10.1117/12.772356
https://doi.org/10.1117/12.772356
Publikováno v:
SPIE Proceedings.
Lag and sensitivity modulation are well known temporal artifacts of a-Si photodiode based flat panel detectors. Both effects are caused by charge carriers being trapped in the semiconductor. Trapping and releasing of these carriers is a statistical p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69072143b05b5fb700b24d83b643a707
https://doi.org/10.1117/12.769951
https://doi.org/10.1117/12.769951
Autor:
Carlo Tognina, Ivan P. Mollov, Earl T. Daley, Todor I. Mollov, Edward Shapiro, Isaias D. Job, Josh Star-Lack, John Pavkovich, Richard E. Colbeth, Pieter Gerhard Roos
Publikováno v:
SPIE Proceedings.
A unique 64-row flat panel (FP) detector has been developed for sub-second multidetector-row CT (MDCT). The intent was to explore the image quality achievable with relatively inexpensive amorphous silicon (a-Si) compared to existing diagnostic scanne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7528832d64d5a5f0ab63b644f3e9766
https://doi.org/10.1117/12.713682
https://doi.org/10.1117/12.713682
Publikováno v:
Medical Imaging 2005: Physics of Medical Imaging.
This paper explores the potential of flat panel detectors in sub-second CT scanning applications. Using a PaxScan 4030CB with 600um thick CsI(Tl), a central section of the panel (16 to 32 rows), was scanned at frame rates up to 1000fps. Using this pl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9f4b8658b06349a636e522d11421f17
https://doi.org/10.1117/12.595631
https://doi.org/10.1117/12.595631
Autor:
Chris Webb, Boris Nepo, Robert Fong, Mark D. Batts, Carlo Tognina, Jiann M. Yu, Delenah Trinh, Ivan P. Mollov, Nima Taie-Nobraie, Richard E. Colbeth, Pieter Gerhard Roos, Isaias D. Job, Keith Gray, Sarah J. Boyce
Publikováno v:
SPIE Proceedings.
This paper describes a new flat panel imager designed for use in cardiovascular and mobile C-arm imaging systems. The a-Si sensor array has a 1024 x 1024 matrix with a pixel pitch of 194 μm, resulting in an active area of 198.7 mm x 198.7 mm. The im
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a31d256401a07daed5c7159f8f4ea30f
https://doi.org/10.1117/12.536054
https://doi.org/10.1117/12.536054
Autor:
Evangelos Matsinos, Peter Munro, Wolfgang Kaissl, Richard E. Colbeth, Edward Shapiro, George Zentai, J. Micheal Yu, Jeroen Richters, John Pavkovich, Heinrich Riem, Gary Virshup, Edward J. Seppi, Ivan P. Mollov, Pieter Gerhard Roos, Carlo Tognina
Publikováno v:
SPIE Proceedings.
The dynamic range of many flat panel imaging systems are fundamentally limited by the dynamic range of the charge amplifier and readout signal processing. We developed two new flat panel readout methods that achieve extended dynamic range by changing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50a0387d6ae552f82d40687ccd197e6e
https://doi.org/10.1117/12.535471
https://doi.org/10.1117/12.535471
Autor:
Colbeth Rick E, Dan T.L. Jones, Ivan P. Mollov, Chris Webb, Ed J Seppi, Stan W Johnsen, Carlo Tognina, Larry Partain, Edward Shapiro, John Pavkovich, Peter Munro
Publikováno v:
International journal of radiation oncology, biology, physics. 55(3)
Purpose: To develop an image receptor capable of forming high-quality megavoltage CT images using modest radiation doses. Methods and Materials: A flat-panel imaging system consisting of a conventional flat-panel sensor attached to a thick CsI scinti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe0e5ec74c64bd335431f5d303bae11c
https://pubmed.ncbi.nlm.nih.gov/12573767
https://pubmed.ncbi.nlm.nih.gov/12573767
Autor:
Ivan P. Mollov, Richard E. Colbeth, Robert Fong, Chris Webb, Keith W. Gray, Boris Nepo, Nima Taie-Nobarie, John Pavkovich, Jiann Michael Yu, Michael Dean Wright, Edward J. Seppi, Sarah J. Boyce, Richard A. Harris, Edward Shapiro, Isaias D. Job
Publikováno v:
Medical Imaging 2001: Physics of Medical Imaging.
Preliminary results are presented from the PaxScan 4030A; a 40x30cm, 2048 x 1536 landscape, flat panel imager, with 194um pixel pitch. This imager builds on our experience with the PaxScan 2520, a 127um real-time flat panel detector capable of both h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ac7760a16640e3449137f7ccc0ef955
https://doi.org/10.1117/12.430917
https://doi.org/10.1117/12.430917