Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Freek C.P. Du Plessis"'
Publikováno v:
Journal of Biomedical Physics and Engineering, Vol 12, Iss 1, Pp 101-108 (2022)
Superficial tumours can be treated with megavoltage electron beams. The underlying tissue can be spared through the steep dose fall-off gradients over a range of a few centimetres.An accurate Monte Carlo model for an Elekta Precise was determined and
Externí odkaz:
https://doaj.org/article/6d8954e0d449470e8a1ccbbe8840b868
Publikováno v:
Polish Journal of Medical Physics and Engineering. 25:101-110
Introduction: Small fields photon dosimetry is associated with many problems. Using the right detector for measurement plays a fundamental role. This study investigated the measurement of relative output for small photon fields with different detecto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7378cac0c49e6bd386277b545b635b10
https://doi.org/10.2478/pjmpe-2019-0014
https://doi.org/10.2478/pjmpe-2019-0014
Autor:
O.M. Oderinde, Freek C.P. du Plessis
Publikováno v:
Journal of Radiation Research and Applied Sciences. 12:132-139
The purpose of this study was to assess the dose variation sensitivity of two quality assurance (QA) devices (Integral quality monitoring (IQM®) and MatriXXEvolution systems) used for radiotherapy ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e377930d08bba7d82b94bbb01f9c76c5
https://doi.org/10.1080/16878507.2019.1618080
https://doi.org/10.1080/16878507.2019.1618080
Autor:
Freek C.P. du Plessis, Déte van Eeden
Publikováno v:
Polish Journal of Medical Physics and Engineering. 24:65-74
Monte Carlo (MC) simulation is the gold standard for dose calculation. An accurate mathematical source model can be used for the radiation beams. Source models can consist of sub-sources or fewer sources with data that need to be measured. This can s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6d6f8a572863e6f1591eaae8a3b607b
https://doi.org/10.2478/pjmpe-2018-0009
https://doi.org/10.2478/pjmpe-2018-0009
Autor:
Freek C.P. du Plessis
Publikováno v:
Polish Journal of Medical Physics and Engineering. 23:47-54
Patients undergoing computerized tomography (CT) scans for tumor localization and treatment planning are frequently scanned using pre-set customized exposure protocols for optimal imaging of different anatomical sites. The question arises if these sc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e814cc5374a961736e8a7f2fd121e676
https://doi.org/10.1515/pjmpe-2017-0009
https://doi.org/10.1515/pjmpe-2017-0009
Publikováno v:
Radiation Physics and Chemistry. 182:109266
Previous studies indicated that clinical electron beam shaping involving a photon multileaf collimator (MLC) can be achieved. It is usually applied in Modulated Electron Radiation Therapy or MERT. This technique requires accurate clinical electron be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc0a98e7d62bad30076dec658c236b8c
https://doi.org/10.1016/j.radphyschem.2020.109266
https://doi.org/10.1016/j.radphyschem.2020.109266
Publikováno v:
Applied Radiation and Isotopes. 164:109244
Aim In this study, an EGSnrc based Monte Carlo electron model was validated for an Elekta Synergy® 160-leaf Agility™ linear accelerator. A previously reported electron energy straggling model based on a Levy distribution was tested against water t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86739c856db41e6d49fc02cb58b714f6
https://doi.org/10.1016/j.apradiso.2020.109244
https://doi.org/10.1016/j.apradiso.2020.109244
Autor:
O.M. Oderinde, Freek C.P. du Plessis
Publikováno v:
Rep Pract Oncol Radiother
AIM: This study focused on evaluating the sensitivity of integral quality monitoring (IQM(®)) system and MatriXX detectors. These two detectors are recommended for radiotherapy pre-treatment quality assurance (QA). BACKGROUND: IQM is a large wedged-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4ecb4c3be4941347d45c83a494eee55
https://pubmed.ncbi.nlm.nih.gov/31406489
https://pubmed.ncbi.nlm.nih.gov/31406489
Autor:
Freek C.P. du Plessis, Déte van Eeden
Publikováno v:
Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB). 32(10)
Introduction A mathematical 3D model of an existing computed tomography (CT) scanner was created and used in the EGSnrc-based BEAMnrc and egs_cbct Monte Carlo codes. Simulated transmission dose profiles of a RMI-465 phantom were analysed to verify Ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc293a98991b17024a03d518c8147aa5
https://pubmed.ncbi.nlm.nih.gov/27682511
https://pubmed.ncbi.nlm.nih.gov/27682511
Publikováno v:
Australasian physicalengineering sciences in medicine. 36(3)
Quality assurance of medical linear accelerators includes dosimetric parameter measurement of therapeutic electron beams e.g. relative dose at a depth of 80 % (R80). This parameter must be within a tolerance of 0.2 cm of the declared value. Cumbersom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8a4936a269a921c3390ed63a965fe3b
https://pubmed.ncbi.nlm.nih.gov/23794059
https://pubmed.ncbi.nlm.nih.gov/23794059