Zobrazeno 1 - 10
of 10
pro vyhledávání: '"David T. Kopp"'
Autor:
J. R. Mercier, David T. Kopp, William D. McDavid, Stephen B Dove, D. M. Tucker, Jack L. Lancaster
Publikováno v:
Health Physics. 79:402-406
Two methods for determining ion chamber calibration factors (N x ) are presented for polychromatic tungsten x-ray beams whose spectra differ from beams with known N x . Both methods take advantage of known x-ray fluence and kerma spectral distributio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::376f4366a92d423515bbd300c41c6d1f
https://doi.org/10.1097/00004032-200010000-00008
https://doi.org/10.1097/00004032-200010000-00008
Autor:
David T. Kopp, Ralph Blumhardt, Jack L. Lancaster, John C. Lasher, Trish A. Hander, Peter T. Fox
Publikováno v:
ResearcherID
An easy and rapid method for the measurement of the intrinsic spatial resolution of a gamma camera was developed. The measurement is based on the first and second statistical moments of regions of interest (ROIs) applied to bar phantom images. This l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::379ebe353a2621ed56b6a0bdf3ea1499
https://doi.org/10.1118/1.597928
https://doi.org/10.1118/1.597928
Publikováno v:
Medical physics. 27(12)
An improved method for an easy, rapid measurement of the intrinsic spatial resolution of a gamma camera is presented. A simplified model was previously developed based solely on mean and standard deviation measurements taken from a region of interest
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::602e6748f9d197b3686960ed607dfd5d
https://pubmed.ncbi.nlm.nih.gov/11190951
https://pubmed.ncbi.nlm.nih.gov/11190951
Autor:
Stephen B Dove, William D. McDavid, David T. Kopp, Jack L. Lancaster, D. M. Tucker, J. R. Mercier
Publikováno v:
Radiation research. 154(5)
Pulse-height distributions of two constant potential X-ray tubes with fixed anode tungsten targets were measured and unfolded. The measurements employed quantitative alignment of the beam, the use of two different semiconductor detectors (high-purity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5465e439c9e46200590b11223ccf3728
https://pubmed.ncbi.nlm.nih.gov/11025653
https://pubmed.ncbi.nlm.nih.gov/11025653
Autor:
Katherine R. Tuttle, Jack L. Lancaster, David T. Kopp, Marie C. Perusek, J. Lewis Bruton, Ralph A. DeFronzo
Publikováno v:
The New England journal of medicine. 324(23)
Many patients with insulin-dependent diabetes mellitus have an increase in the glomerular filtration rate and renal enlargement early in the course of their disease. Both these changes may be risk factors for the later development of diabetic nephrop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4335da808fe144f8a3332e34d7b3d089
https://pubmed.ncbi.nlm.nih.gov/2030723
https://pubmed.ncbi.nlm.nih.gov/2030723
Publikováno v:
Medical Physics. 15:642-647
It is desirable to have an accurate method to determine the depth of various organs which are commonly imaged in nuclear medicine. The method presented here utilizes the geometrical characteristics of the rotating slant‐hole collimator to calculate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c6ccc4d32ffd257b7e442ec6e42a239
https://doi.org/10.1118/1.596221
https://doi.org/10.1118/1.596221
Autor:
F.O. Tio, R. D. Borchert, O. Garcia, Jack L. Lancaster, R. Alvarado, Richard A. Schatz, V. Ciaravino, Chet R. Rees, David T. Kopp, Julio C. Palmaz
Publikováno v:
Pros and Cons in PTA and Auxiliary Methods ISBN: 9783540193067
Growing interest in the research of percutaneous intravascular metallic stents is evidenced by the rapidly increasing number of investigations on the subject [1–6]. Sigwart et al. [7] first demonstrated successful clinical use of intracoronary sten
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba51a8843b9753becd55407b31af57e7
https://doi.org/10.1007/978-3-642-73736-7_21
https://doi.org/10.1007/978-3-642-73736-7_21
Publikováno v:
Health physics. 45(3)
An evaluation of certain radiographic factors affecting patient exposure during urography is made. Factors considered include selection of tube kilovoltage, total beam filtration and film-screen combination. The effect on image quality is also consid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ddde131ed2c783b15be598ea8c166b4
https://pubmed.ncbi.nlm.nih.gov/6885469
https://pubmed.ncbi.nlm.nih.gov/6885469
Autor:
Joseph Arcarese, James Vandergrift, Robert Mattrey, Lincoln B. Hubbard, Theodore Villafana, Thomas Padikal, Karen P. Doppke, Edward Manny, Morris Hodara, F. Marc Edwards, Steven L. Fritz, Robert F. Moyer, Bhagwat Ahluwalia, Gary T. Barnes, Robert L. Dixon, Louis Levy, John R. Glover, Joel E. Gray, David T. Kopp, Daniel A. Bassano, Stephen Rudin, David Marsden, James E. Rodgers, John Glover, Jonathan Law, Michael T. Gillin, Lincoln Hubbard, Martin Trefler, Ted Fields
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dfbabddd8f6f0094d7f7c1b6a89d1a53
https://doi.org/10.37206/10
https://doi.org/10.37206/10
Autor:
R. R. Sibbitt, David T. Kopp, Julio C. Palmaz, F. Garcia, W. Schwesinger, Jack L. Lancaster, P. Chang, Fermin O. Tio
Publikováno v:
AJR. American journal of roentgenology. 147(6)
A canine experimental model was used to investigate the feasibility of using balloon-expandable portacaval shunts in humans with chronic portal hypertension. Intrahepatic portacaval shunts were created in nine dogs with stable portal hypertension pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65ae022bbcc517bf094d268110ee81b8
https://pubmed.ncbi.nlm.nih.gov/3490761
https://pubmed.ncbi.nlm.nih.gov/3490761