Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Prem N. Pareek"'
Publikováno v:
Technology in Cancer Research & Treatment. 8:307-314
We compare measured output factors of clinical electron fields to those calculated by a commercial treatment planning system based on an electron Monte Carlo algorithm. The measured data is comprised of 195 fields with energies 6 to 18 MeV, applicato
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab03f65708839d0f3e7eb6b9f14a4a92
https://doi.org/10.1177/153303460900800407
https://doi.org/10.1177/153303460900800407
Autor:
Richard A. Popple, Jun Duan, R Weinberg, Ivan A. Brezovich, John A. Antolak, Sung-Joon Ye, Sui Shen, Prem N. Pareek
Publikováno v:
Medical Physics. 33:1540-1551
A commercial electron dose calculation software implementation based on the macro Monte Carlo algorithm has recently been introduced. We have evaluated the performance of the system using a standard verification data set comprised of two-dimensional
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e75fbe72a6b5f708649e93a64ea26519
https://doi.org/10.1118/1.2198328
https://doi.org/10.1118/1.2198328
Publikováno v:
Medical Physics. 32:1460-1468
Total skinelectron irradiation (TSEI) with single fields requires large electron beams having good dose uniformity, d max at the skin surface, and low bremsstrahlung contamination. To satisfy these requirements, energy degraders and scattering foils
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67f399307314378215b44cc23d4df0f9
https://doi.org/10.1118/1.1924368
https://doi.org/10.1118/1.1924368
Publikováno v:
Journal of Applied Clinical Medical Physics
Some modern treatment planning systems (TPSs) provide for input of wedge factor (WF) tables covering the entire range of square and elongated fields available on the accelerator. Depending on the field size increment chosen and the number of availabl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::210141f67ac7843879c1a6f2b3bc898e
https://doi.org/10.1120/jacmp.v6i1.2063
https://doi.org/10.1120/jacmp.v6i1.2063
Publikováno v:
Brachytherapy. 4:286-290
Purpose With advances in imaging studies, dose specification for uterine cancer can be defined at specific anatomical sites such as the myometrium or the serosal surface rather than at arbitrary points or milligram-hours. This report presents our exp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::133e9cb7662aca7ca6aff3102a1cc77c
https://doi.org/10.1016/j.brachy.2005.10.002
https://doi.org/10.1016/j.brachy.2005.10.002
Publikováno v:
Medical Physics. 31:2097-2106
Unlike the penetrating monoenergetic 662 keV gamma rays emitted by 137Cs LDR sources, the spectrum of 192Ir used in HDR brachytherapy contains low-energy components. Since these are selectively absorbed by the high-atomic number materials of which in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66e233715505c049edf308166ec37d50
https://doi.org/10.1118/1.1762791
https://doi.org/10.1118/1.1762791
Autor:
Jun Duan, James A. Bonner, Sui Shen, Brian A. Plant, John B. Fiveash, Ivan A. Brezovich, Richard A. Popple, Prem N. Pareek, Sharon A. Spencer
Publikováno v:
Medical Physics. 30:3196-3205
The capability of a commercial respiratory gating system based on video tracking of reflective markers to reduce motion-induced CT planning and treatment errors was evaluated. Spherical plastic shells (2.8-82 cm3), simulating the gross target volume
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a88821519455b106d309e2990f2425b9
https://doi.org/10.1118/1.1626121
https://doi.org/10.1118/1.1626121
Publikováno v:
Medical Physics. 30:2699-2702
Carcinoma of the cervix is typically treated with a combination of intracavitary brachytherapy and external beam radiation. The external beam dose is delivered with whole pelvis fields followed by split fields that protect midline organs at risk (bla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f3c3d6a96e7510e4d1fe98fae22d1d71
https://doi.org/10.1118/1.1604511
https://doi.org/10.1118/1.1604511
Publikováno v:
Medical Physics. 30:2241-2252
Intensity modulated radiation therapy (IMRT) with a dynamic multileaf collimator (DMLC) requires synchronization of DMLC leaf motion with dose delivery. A delay in DMLC communication is known to cause leaf lag and lead to dosimetric errors. The error
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a24b30f76e870ade89f235846c9d3d1
https://doi.org/10.1118/1.1592017
https://doi.org/10.1118/1.1592017
Autor:
James A. Bonner, Ivan A. Brezovich, Ruby F. Meredith, Prem N. Pareek, Donald J. Buchsbaum, Sui Shen, Jun Duan
Publikováno v:
Cancer. 94:1264-1269
BACKGROUND Clinical trials of radioimmunotherapy (RIT) often use dose fractionation to reduce marrow toxicity. The dosing scheme can be optimized if marrow and tumor cell kinetics following radiation exposure are known. METHODS A mathematic model of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e58003bcaf15352a7789371633b428f
https://doi.org/10.1002/cncr.10295
https://doi.org/10.1002/cncr.10295