Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Robert G. Waggener"'
Autor:
Melissa M. Blough, William D. McDavid, Sean Zhang, Nina E. Lee, James A. Terry, Di Chen, Robert G. Waggener
Publikováno v:
Medical Physics. 26:1269-1278
Attenuation measurements for primary x-ray spectra from 25 kVp to 18 MV were made using aluminum filters for all energies except for orthovoltage where copper filters were used. An iterative perturbation method, which utilized these measurements, was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f47a890705cba411062f6e211e77c7c2
https://doi.org/10.1118/1.598622
https://doi.org/10.1118/1.598622
Publikováno v:
Journal of X-ray science and technology. 17(1)
Megavoltage X-ray sources are commonly used for therapy planning, and knowledge of their spectral distribution is important for accurate dose calculations. There are many methods that could provide reasonable estimations of Megavoltage X-ray spectra,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c74774b4e202f91fa23da0f811fa8a23
https://pubmed.ncbi.nlm.nih.gov/19644215
https://pubmed.ncbi.nlm.nih.gov/19644215
Publikováno v:
Medical physics. 26(6)
A multihole diverging Cerrobend plug for megavoltage energies was used to measure water transmission values at different locations in a 20×20 cm field at 100 cm source-to-axis distance (SAD) for 4, 6, and 15 MV therapy photon beams. The transmission
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e1bc6ad874cd591f0e195863c3d1ff0
https://pubmed.ncbi.nlm.nih.gov/10436897
https://pubmed.ncbi.nlm.nih.gov/10436897
Publikováno v:
Medical physics. 26(2)
Differences in half-value layer (HVL) and radiation intensity are investigated as a function of position in the mammographic radiation field. Sources of systematic variation include the heel effect, the inverse square law, and differential photon pat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a03a52b776247a54393c9e1c6018e61
https://pubmed.ncbi.nlm.nih.gov/10076984
https://pubmed.ncbi.nlm.nih.gov/10076984
Publikováno v:
Medical physics. 25(9)
A model for calculating mammographic spectra independent of measured data and fitting parameters is presented. This model is based on first principles. Spectra were calculated using various target and filter combinations such as molybdenum/molybdenum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37ac0d8acd6f6d448df07a13a69a38a2
https://pubmed.ncbi.nlm.nih.gov/9775364
https://pubmed.ncbi.nlm.nih.gov/9775364
Publikováno v:
Physics in medicine and biology. 37(12)
A variable Jacobian and weighted backprojection algorithm, used for medical CT, was adapted to perform CT reconstructions on data obtained with a dental panoramic x-ray unit. A detector array, fitted to the unit for the purpose of acquiring digital p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea4646cb371d8878b7b7fe2af75eb2ee
https://pubmed.ncbi.nlm.nih.gov/1470640
https://pubmed.ncbi.nlm.nih.gov/1470640
Autor:
Joseph S. Blinick, Edward L. Nickoloff, Mitchell G. Randall, Mary E. Moore, G. Donald Frey, Robert Y. L. Chu, Priscilla F. Butler, James V. Atherton, Lance V. Hefner, Joel E. Gray, Stephen Balter, Robert G. Waggener, Louis K. Wagner
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::028b0cd15a75a27b3cb0b1a59afe0aa9
https://doi.org/10.37206/32
https://doi.org/10.37206/32
Publikováno v:
Medical Physics. 34:2409-2409
Purpose: To propose a novel reconstruction algorithm which is accurate even for transmitted data affected by the usual experimental error, and therefore can be used in a typical clinical environment. Method and Materials:Ionization chamber and radiol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c340d95b1094c805f7a4582a624dffba
https://doi.org/10.1118/1.2760684
https://doi.org/10.1118/1.2760684
Autor:
Tony Yuen Eng, Charles R. Thomas, Carlos Esquivel, Martin L. Meltz, Clifton D. Fuller, Melissa M. Blough, Robert G. Waggener, Adrian Wong
Publikováno v:
Radiation Oncology (London, England)
Radiation Oncology, Vol 1, Iss 1, p 36 (2006)
Radiation Oncology, Vol 1, Iss 1, p 36 (2006)
Background Treatment of choroidal melanoma with radiation often involves placement of customized brachytherapy eye-plaques. However, the dosimetric properties inherent in source-based radiotherapy preclude facile dose optimization to critical ocular
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce579597354ce04d7b7b4fb41025114b
http://europepmc.org/articles/PMC1586203
http://europepmc.org/articles/PMC1586203
Publikováno v:
Medical Physics. 33:2016-2016
Purpose: To determine diagnostic x‐ray photon spectra using simple transmission measurements.Method and Materials: A database of measured and calculated x‐ray photon spectra values from the Catalogue of Spectral Data for Diagnostic X‐rays, R. B
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93c0043f998a8a5fd6b3053349a0e9e8
https://doi.org/10.1118/1.2240763
https://doi.org/10.1118/1.2240763