Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Daniel David Harrison"'
Autor:
Louis Paul Inzinna, Norbert J. Pelc, Jongduk Baek, V. Bogdan Neculaes, Joseph Reynolds, Daniel David Harrison, Kristopher Frutschy, Jorge Uribe, Randy Scott Longtin, Robert Franklin Senzig, Bruno De Man, Antonio Caiafa
Publikováno v:
Physics in Medicine and Biology. 59:1189-1202
We present initial experimental results of a rotating-gantry multi-source inverse-geometry CT (MS-IGCT) system. The MS-IGCT system was built with a single module of 2 × 4 x-ray sources and a 2D detector array. It produced a 75 mm in-plane field-of-v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ca001f1a75c867a21f04cf03c533d50
https://doi.org/10.1088/0031-9155/59/5/1189
https://doi.org/10.1088/0031-9155/59/5/1189
Publikováno v:
Medical Physics. 38:4265-4275
Purpose: Energy discriminating photon countingx-ray detectors can be subject to a wide range of flux rates if applied in clinical settings. Even when the incident rate is a small fraction of the detector’s maximum periodic rateN 0, pulse pileup lea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b8a7e22bc0770fbcb0e1854e007e892
https://doi.org/10.1118/1.3592932
https://doi.org/10.1118/1.3592932
Publikováno v:
OPTICS EXPRESS(23): 6
A multi-source inverse-geometry CT (MS-IGCT) system consists of a small 2D detector array and multiple x-ray sources. During data acquisition, each source is activated sequentially, and may have random source intensity fluctuations relative to their
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7839aba5f902245f489287595dc0fde9
https://europepmc.org/articles/PMC4408891/
https://europepmc.org/articles/PMC4408891/
Autor:
Daniel David Harrison, Vladimir A. Lobastov, Pete Edic, J. Eric Tkaczyk, Hewei Gao, Daniel Rubin
Publikováno v:
SPIE Proceedings.
The image quality entitlement is evaluated for multi-energy bin photon counting (PC) spectral CT relative to that of energy integration an dual kVp (dkVp) imaging. Physics simulations of X-ray projection channel data and CT images are used to map con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ae2780147e87f851af126f033665ab1
https://doi.org/10.1117/12.912113
https://doi.org/10.1117/12.912113
Autor:
Louis Paul Inzinna, Daniel David Harrison, Joseph Reynolds, Norbert J. Pelc, V. Bogdan Neculaes, Jorge Uribe, Antonio Caiafa, Bruno Kristiaan Bernard DeMan, Jongduk Baek
Publikováno v:
SPIE Proceedings.
The multi-source inverse-geometry CT(MS-IGCT) system is composed of multiple sources and a small 2D detector array. An experimental MS-IGCT system was built and we report initial results with 2×4 x-ray sources, a 75 mm inplane field-of-view (FOV) an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ea95807ababd182dbc8c250c3b05e56
https://doi.org/10.1117/12.912207
https://doi.org/10.1117/12.912207
Publikováno v:
SPIE Proceedings.
The contrast-to-noise (CNR) is optimized over the weights and energy threshold settings of energy bins in a photon counting detector using "delta-pulse" model simulations. Comparison is made to single-bin photon counting and energy integration detect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1fcdcf77452c0c36d0fa06ea9597f25
https://doi.org/10.1117/12.878290
https://doi.org/10.1117/12.878290
Autor:
Norbert J. Pelc, Randy Scott Longtin, Jorge Uribe, Jongduk Baek, William Waters, Daniel David Harrison, V. Bogdan Neculaes, Louis Paul Inzinna, Antonio Caiafa, Kristopher Frutschy, Joseph Reynolds, Bruno De Man, Robert Franklin Senzig
Publikováno v:
IEEE Nuclear Science Symposuim & Medical Imaging Conference.
Today's 3rd generation CT scanners have one or two X-ray tubes, with one focal spot or “source” per vacuum chamber or “tube”. Our first multi-source inverse geometry CT prototype has eight X-ray sources. We have demonstrated multisource imagi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9022734f1afe1b14437b818111dc54c0
https://doi.org/10.1109/nssmic.2010.5874253
https://doi.org/10.1109/nssmic.2010.5874253
Autor:
Yun Zou, Daniel David Harrison, William Waters, Kristopher Frutschy, Jongduk Baek, Bob Senzig, V. Bogdan Neculaes, Jorge Uribe, Zhye Yin, Norbert J. Pelc, Lou Inzinna, Jonathan David Short, Xi Zhang, Joseph Reynolds, Randy Scott Longtin, Antonio Caiafa, Yang Cao, Jaydeep Roy, Bruno De Man
Publikováno v:
2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC).
Third-generation CT architectures are approaching fundamental limits. Dose-efficiency is limited by finite detector efficiency and by limited control over the X-ray flux spatial profile. Increasing the volumetric coverage comes with increased scatter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e258e417da6b642b13eebf4d4087c970
https://doi.org/10.1109/nssmic.2009.5401808
https://doi.org/10.1109/nssmic.2009.5401808
Autor:
Deborah Walter, Yanfeng Du, Jeffery Shaw, Rogerio Rodrigues, Jonathan David Short, Daniel David Harrison, W.M. Leue, Peter Michael Edic, J. Eric Tkaczyk, Xiaoye Wu
Publikováno v:
SPIE Proceedings.
The material specificity of computed tomography is quantified using an experimental benchtop imaging system and a physics-based system model. The apparatus is operated with different detector and system configurations each giving X-ray energy spectra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c6227cce7b05fc485646b0ada309f47
https://doi.org/10.1117/12.709905
https://doi.org/10.1117/12.709905
Autor:
J. Eric Tkaczyk, Yves Trousset, Richard A. Thompson, Daniel David Harrison, Deborah Walter, Yanfeng Du
Publikováno v:
SPIE Proceedings.
A convolution model of scatter that is adaptable to rapid simulation and correction algorithms is tested against the measured scatter profiles. In the simple case of a uniform acrylic sheet, the convolution approach yields about 10% absolute agreemen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4d8531628e09fa64b81d893e5f2a101
https://doi.org/10.1117/12.653747
https://doi.org/10.1117/12.653747