Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Grant M. Stevens"'
Publikováno v:
Medical Physics. 42:6572-6578
Purpose: This technical note quantifies the dose and image quality performance of a clinically available organ-dose-based tube current modulation (ODM) technique, using experimental and simulation phantom studies. The investigated ODM implementation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eeec731c9918ec8ed5b20f80512ffac0
https://doi.org/10.1118/1.4933197
https://doi.org/10.1118/1.4933197
Autor:
Rowland Frederick Saunders, Grant M. Stevens, Norbert J. Pelc, John A. Rowlands, Zhifei Wen, Rebecca Fahrig, G. DeCrescenzo, Arundhuti Ganguly
Publikováno v:
Medical Physics. 32:1775-1784
Minimally invasive procedures are increasing in variety and frequency, facilitated by advances in imaging technology. Our hybrid imaging system (GE Apollo{sup TM} flat panel, custom Brand x-ray static anode x-ray tube, GE Lunar high-frequency power s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0775783827aafedbc2ec29f900de25e
https://doi.org/10.1118/1.1915016
https://doi.org/10.1118/1.1915016
Autor:
Christopher F. Beaulieu, Robyn L. Birdwell, Grant M. Stevens, Debra M. Ikeda, Norbert J. Pelc
Publikováno v:
Radiology. 228:569-575
Phantom and in vitro studies were performed to evaluate the potential application of digital circular tomosynthesis in imaging of the breast and upper cervical spine. A prototype volumetric x-ray system was used to image a mammographic phantom, a fre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf277319d625ce2f01979d1b12b4f22e
https://doi.org/10.1148/radiol.2282020295
https://doi.org/10.1148/radiol.2282020295
Publikováno v:
Medical Physics. 28:1472-1481
A test-bed system has been developed for imaging phantoms with tomosynthesis and volumetric computed tomography. This system incorporates an amorphous silicon flat panel detector on a movable gantry and a computer-controlled rotational positioning st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1df377381937a0d0a51da7c0580bb63f
https://doi.org/10.1118/1.1382609
https://doi.org/10.1118/1.1382609
Autor:
Zhifei Wen, Bruce L. Daniel, John Stanton, Rowland Frederick Saunders, Kim Butts, Grant M. Stevens, John A. Rowlands, Norbert J. Pelc, David L. Ergun, Rebecca Fahrig
Publikováno v:
Journal of Magnetic Resonance Imaging. 13:294-300
A system enabling both x-ray fluoroscopy and MRI in a single exam, without requiring patient repositioning, would be a powerful tool for image-guided interventions. We studied the technical issues related to acquisition of x-ray images inside an open
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79948eef55cef80d2bc876ba37bec7b3
https://doi.org/10.1002/1522-2586(200102)13:2<294::aid-jmri1042>3.0.co
https://doi.org/10.1002/1522-2586(200102)13:2<294::aid-jmri1042>3.0.co
Autor:
Norbert J. Pelc, Grant M. Stevens
Publikováno v:
Medical Physics. 27:1174-1184
A new energy-dependent multi-cell detector, which is a generalization of the conventional front-back detector, was studied using computer simulations. The noise performance of the detector for bone quantitation was examined in comparison to an ideal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44136edb5cd3d1d8b59af85e57282767
https://doi.org/10.1118/1.598982
https://doi.org/10.1118/1.598982
Autor:
R Singh, Grant M. Stevens
Publikováno v:
Medical Physics. 41:139-140
Purpose: To design an approach to optimize radiation dose and image quality for pediatric CT imaging, and to evaluate expected performance. Methods: A methodology was designed to quantify relative image quality as a function of CT image acquisition p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1bb5d51969f38ea09fc845860675777b
https://doi.org/10.1118/1.4887991
https://doi.org/10.1118/1.4887991
Publikováno v:
Proceedings of the 22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (Cat. No.00CH37143).
An ideal imaging technique for lung nodule screening would allow the visualization of small nodules within a complex anatomical background, use a low radiation dose technique, acquire images in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b990908585b8e2f69aafd1de2d41b3bc
https://doi.org/10.1109/iembs.2000.900394
https://doi.org/10.1109/iembs.2000.900394
Publikováno v:
Medical physics. 28(3)
A filtering technique has been developed to modify the three-dimensional impulse response of circular motion tomosynthesis to allow the generation of images whose appearance is like those of some other imaging geometries. In particular, this techniqu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1fd1e62c21d18fa1cd7cb4e75fa5131c
https://pubmed.ncbi.nlm.nih.gov/11318319
https://pubmed.ncbi.nlm.nih.gov/11318319
Publikováno v:
Medical Physics. 40:121905
Purpose: This study investigated the effects of tilted-gantry acquisition on image noise and glandular breast dose in females during cardiac computed tomography (CT) scans. Reducing the dose to glandular breast tissue is important due to its high rad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c30f117d2f1c8d8e6e9ca0336c3b8829
https://doi.org/10.1118/1.4829521
https://doi.org/10.1118/1.4829521