Zobrazeno 1 - 10
of 48
pro vyhledávání: '"R.C. Samaratunga"'
Autor:
Mary C. Mahoney, R.C. Samaratunga, R. Edward Hendrick, Michael Lamba, Zhihua Qi, Hua-Hsuan Chen, Lisa C. Lemen
Publikováno v:
Academic Radiology. 23:987-993
Rationale and Objectives This work aimed to study the effects of scanner model and study protocol on radiation dose received by breast tissues from 64-slice computed tomography (CT) studies. Materials and Methods Four scanner models and three study p
Publikováno v:
World journal of radiology. 8(6)
To characterize the effects of iodinated contrast material (ICM) on magnetic resonance imaging (MRI) comparing different sequences and magnetic fields, with emphasis to similarities/differences with well-known signal characteristics of hemorrhage in
Autor:
Stephen R. Thomas, Anthony J. McGoron, Ronald G. Pratt, William M. Kassing, Howard R. Elson, David W. Pipes, R.C. Samaratunga
Publikováno v:
Cardiovascular Radiation Medicine. 1:368-375
Purpose. Optimization of intravascular radiation to reduce stenosis following coronary angioplasty requires the ability to predict the patterns of radiation dose distribution. This investigation evaluated the agreement between Monte Carlo simulations
Autor:
Jie Zheng, Ronald G. Pratt, Yoseph Shiferaw, Brent K. Stewart, R.C. Samaratunga, Anthony J. McGoron, Stephen R. Thomas
Publikováno v:
Magnetic Resonance in Medicine. 37:307-313
A limited flip angle gradient-echo 3D volume acquisition imaging protocol for mapping partial pressure of oxygen (pO 2 ) in perfluorocarbon compounds (PFCs) at low field (0.14 T) is presented. The pO 2 measurement method is based on the paramagnetic
Autor:
Stephen R. Thomas, Yoseph Shiferaw, Ronald W. Millard, Ronald G. Pratt, Leland C. Clark, Richard E. Hoffmann, R.C. Samaratunga
Publikováno v:
Journal of Magnetic Resonance Imaging. 4:631-635
Oxygen-sensitive F-19 magnetic resonance imaging of perfluorocarbon compounds requires that fluorocarbon T1 changes correlate with the local PO2 and not with the composition of the surrounding aqueous phase. The influence of various bioconstituents a
Publikováno v:
Medical Physics. 21:697-705
Fluorine-19 nuclear magnetic resonance of perfluorinated blood substitute materials provides a method for determination of oxygen tension (pO2) in vivo. Use of a double resonant 19F/1H radio frequency coil allows convenient correlation between the hi
Publikováno v:
Artificial Cells, Blood Substitutes, and Biotechnology. 22:1029-1042
The physiological redistribution of perfluorocarbon (PFC) compounds to liver, spleen, bone marrow, and lung after intravenous (i.v.) or intraperitoneal (IP) administration of PFC emulsions affords the unique opportunity for non-invasive monitoring of
Autor:
Ronald G. Pratt, Karl J. Bertram, Stephen R. Thomas, Paul R. Sanberg, Andrew B. Norman, R.C. Samaratunga
Publikováno v:
Brain Research Bulletin. 26:593-597
Intravenous administration of hyperosmotic mannitol into rats produced a disruption of the blood-brain barrier (BBB). This was visualized by T1 weighted magnetic resonance (MR) imaging following intravenous administration of the MR contrast agent gad
Autor:
Srinath Sundararaman, R.C. Samaratunga, Bernard S. Aron, Alvis E. Foster, Kevin P. Redmond, R.A. Legorreta, G. Cooper Lewis, David L. Denman, Angela M. Born, James G. Kereiakes, Howard R. Elson
Publikováno v:
International Journal of Radiation Oncology*Biology*Physics. 19:677-685
Patterns of specific absorption rates generated by interstitial, microwave antenna arrays must be experimentally ascertained and quantified to facilitate their clinical incorporation. Phantom studies involved the use of four single-gap, coaxial anten
Publikováno v:
Thyroid : official journal of the American Thyroid Association. 7(2)
When macrometastases are delineated clearly using current radiographic techniques and/or physical examination and can be shown to concentrate 131I, the therapeutic activity to be administered may be determined quantitatively. Administrations of 131I