Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Konrad W. Leszczynski"'
Autor:
Konrad W. Leszczynski, Weiguang Yao
Publikováno v:
Medical Physics. 36:3145-3156
X-rayscatter estimation in heterogeneous medium is a challenge in improving the quality of diagnostic projection images and volumetric image reconstruction. For Compton scatter, the statistical behavior of the first order scatter can be accurately de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::784b5c6a4526207b0502b7a182942c3b
https://doi.org/10.1118/1.3152114
https://doi.org/10.1118/1.3152114
Autor:
Weiguang Yao, Konrad W. Leszczynski
Publikováno v:
Medical Physics. 36:3157-3167
Recently, the authors proposed an analytical scheme to estimate the first order x-ray scatter by approximating the Klein-Nishina formula so that the first order scatter fluence is expressed as a function of the primary photon fluence on the detector.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61e27111d5a35483283c7645eb081c43
https://doi.org/10.1118/1.3152115
https://doi.org/10.1118/1.3152115
Autor:
Michael Sharpe, T.K. Oliver, Esther Green, Eric Gutierrez, Anthony Whitton, S. Etheridge, Padraig Warde, Lisa Favell, Kate Bak, K. Fleming, Konrad W. Leszczynski
Publikováno v:
Clinical Oncology. 21:192-203
By minimising the effect of irradiation on surrounding tissue, intensity-modulated radiation therapy (IMRT) can deliver higher, more effective doses to the targeted tumour site, minimising treatment-related morbidity and possibly improving cancer con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5abec3eff1cbba717370358241283e40
https://doi.org/10.1016/j.clon.2008.10.005
https://doi.org/10.1016/j.clon.2008.10.005
Publikováno v:
The British Journal of Radiology. 68:165-174
In many radiotherapy facilities radiotherapy portal verification is currently a subjective process based on the visual comparison of a treatment or portal image with a prescription or simulation image. The reliability of this process is unknown. We d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::575a4387e18fb3bc54f2f5602c923dbd
https://doi.org/10.1259/0007-1285-68-806-165
https://doi.org/10.1259/0007-1285-68-806-165
Autor:
M Oliver, A. Pearce, Konrad W. Leszczynski, A McAllister, X Wang, A. Andronowski, D. McConnell, M. Romani
Publikováno v:
The British journal of radiology. 85(1020)
The primary purpose of this study was to assess the practical trade-offs between intensity-modulated radiation therapy (IMRT) and dual-arc volumetric-modulated arc therapy (DA-VMAT) for locally advanced head and neck cancer (HNC).For 15 locally advan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d493c8979955a69bf10b16d742df21a3
https://pubmed.ncbi.nlm.nih.gov/22806619
https://pubmed.ncbi.nlm.nih.gov/22806619
Publikováno v:
Medical Physics. 20:687-694
An automated technique has been developed for the verification of treatment field size and shape in external beam radiation therapy. Portal images from film or digital on-line imaging system are analyzed, and basic parameters are derived to describe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bbb06f11856bec7dd57995c2113a089
https://doi.org/10.1118/1.597017
https://doi.org/10.1118/1.597017
Autor:
Weiguang, Yao, Konrad W, Leszczynski
Publikováno v:
Medical physics. 36(7)
X-ray scatter estimation in heterogeneous medium is a challenge in improving the quality of diagnostic projection images and volumetric image reconstruction. For Compton scatter, the statistical behavior of the first order scatter can be accurately d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::8bb65515e64a063127307a305ee78b4c
https://pubmed.ncbi.nlm.nih.gov/19673213
https://pubmed.ncbi.nlm.nih.gov/19673213
Autor:
Weiguang, Yao, Konrad W, Leszczynski
Publikováno v:
Medical physics. 36(7)
Recently, the authors proposed an analytical scheme to estimate the first order x-ray scatter by approximating the Klein-Nishina formula so that the first order scatter fluence is expressed as a function of the primary photon fluence on the detector.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::e0f160344a203b066f208d77985be6d0
https://pubmed.ncbi.nlm.nih.gov/19673214
https://pubmed.ncbi.nlm.nih.gov/19673214
Autor:
Weiguang Yao, Konrad W. Leszczynski
Publikováno v:
Physics in medicine and biology. 54(3)
Weighting factors, which define the contributions of individual voxels of a 3D object to individual projection elements (pixels) on the detector, are the basic elements required in iterative tomographic reconstructions from transmission projections.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e141ef6105ddba45339601a54435daff
https://pubmed.ncbi.nlm.nih.gov/19124949
https://pubmed.ncbi.nlm.nih.gov/19124949
Publikováno v:
Physics in Medicine and Biology. 35:429-439
Two complementary approaches to the noise suppression problem in on-line portal imaging have been analysed. Temporal filtering by image summation can substantially reduce the amount of noise in an image. In many cases, however, movements of the patie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11ba9944dcce3ea3e10b9fafbbc39df0
https://doi.org/10.1088/0031-9155/35/3/011
https://doi.org/10.1088/0031-9155/35/3/011