Zobrazeno 1 - 10
of 84
pro vyhledávání: '"O. Christianson"'
Autor:
Joseph J. Chen, James J. Filliben, Eliot L. Siegel, Elizabeth Krupinski, Ehsan Samei, Alden A. Dima, Z Yang, Christopher Trimble, O Christianson, Adele P. Peskin, Ganesh Saiprasad
Publikováno v:
Radiology. 277:124-133
To compare image resolution from iterative reconstruction with resolution from filtered back projection for low-contrast objects on phantom computed tomographic (CT) images across vendors and exposure levels.Randomized repeat scans of an American Col
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f7654b3fa0d87cad83c6cb75f3ef523
https://doi.org/10.1148/radiol.2015141260
https://doi.org/10.1148/radiol.2015141260
Autor:
Habib Zaidi, Ehsan Samei, J Nelson, O Christianson, Mark T. Madsen, Stephen R. Thomas, Beth A. Harkness, Eugene Mah
Publikováno v:
Medical physics. 39(6Part3)
Purpose: Nuclear medicinequality control programs require daily evaluation for the presence of potential non‐uniformities by commonly utilizing a traditional pixel value‐based assessment (Integral CFOVUniformity). While this method effectively ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8382a019a84fd90113083e863c3498a3
https://pubmed.ncbi.nlm.nih.gov/28517373
https://pubmed.ncbi.nlm.nih.gov/28517373
Autor:
Daniel T. Boll, Douglas Larson, Rendon C. Nelson, Daniele Marin, O Christianson, Achille Mileto, Joshua M. Wilson, Ehsan Samei
Publikováno v:
AJR. American journal of roentgenology. 208(6)
The purpose of this study was to conduct longitudinal analyses of radiation dose data from adult patients undergoing clinically indicated, repeat identical thoracoabdominal CT examinations.Radiation dose data were electronically collected from 2851 s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::149bfe3a3be64f4792b9b45668d39fea
https://pubmed.ncbi.nlm.nih.gov/28350484
https://pubmed.ncbi.nlm.nih.gov/28350484
Publikováno v:
Medical Physics. 39:7131-7139
Purpose: The potential health risks associated with low levels of ionizing radiation have created a movement in the radiology community to optimize computed tomography (CT) imaging protocols to use the lowest radiation dose possible without compromis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2d8ec56d1113382647e1e8e6a15b82b
https://doi.org/10.1118/1.4761871
https://doi.org/10.1118/1.4761871
Publikováno v:
Medical Physics. 39:6048-6055
Purpose: To quantitatively compare noise texture across computed tomography (CT) scanners from different manufacturers using the noise power spectrum (NPS). Methods: The American College of Radiology CT accreditation phantom (Gammex 464, Gammex, Inc.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eca91dd63f5f22d386f2528a5d47fc7f
https://doi.org/10.1118/1.4752209
https://doi.org/10.1118/1.4752209
Autor:
O Christianson, Ehsan Samei
Publikováno v:
Journal of the American College of Radiology. 11:832-834
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c75c6b4ffd8ac6ae9942d15f8dc747c
https://doi.org/10.1016/j.jacr.2014.05.004
https://doi.org/10.1016/j.jacr.2014.05.004
Publikováno v:
IEEE Transactions on Energy Conversion. 23:789-795
Linear induction motors are under development for a variety of demanding applications including aircraft launchers and magnetically levitating trains. These applications require machines that can produce large forces, operate at high speeds, and can
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a57aade2e2196313334ac50035eb83f
https://doi.org/10.1109/tec.2008.926060
https://doi.org/10.1109/tec.2008.926060
Publikováno v:
AJR. American journal of roentgenology. 205(1)
The purpose of this study was to develop and validate an automated method to measure noise in clinical CT examinations.An automated algorithm was developed to measure noise in CT images. To assess its validity, the global noise level was compared wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::248402dc3dbd34f29702c74024f0dcec
https://pubmed.ncbi.nlm.nih.gov/26102424
https://pubmed.ncbi.nlm.nih.gov/26102424
Autor:
James J. Filliben, Alden A. Dima, Adele P. Peskin, Christopher Trimble, Joseph J. Chen, Eliot L. Siegel, Ganesh Saiprasad, O Christianson, Z Yang, Ehsan Samei
Publikováno v:
Radiology. 275(3)
To develop and validate a metric of computed tomographic (CT) image quality that incorporates the noise texture and resolution properties of an image.Images of the American College of Radiology CT quality assurance phantom were acquired by using thre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5438846119008be8bb18dd451bc9292
https://pubmed.ncbi.nlm.nih.gov/25686365
https://pubmed.ncbi.nlm.nih.gov/25686365
Autor:
Kingshuk Roy Choudhury, Michael F. Brinkley, O Christianson, Joshua M. Wilson, Ehsan Samei, Juan Carlos Ramirez-Giraldo, Daniel J. Frush, Donald P. Frush
Publikováno v:
European radiology. 26(1)
To assess the effect of automatic tube potential selection (ATPS) on radiation dose, image quality, and lesion detectability in paediatric abdominopelvic CT and CT angiography (CTA). A paediatric modular phantom with contrast inserts was examined wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::612f6263ed120e6a5046916fb8c62e3c
https://pubmed.ncbi.nlm.nih.gov/25991484
https://pubmed.ncbi.nlm.nih.gov/25991484