Zobrazeno 1 - 10
of 111
pro vyhledávání: '"Peter N. Johnston"'
Publikováno v:
Journal of Medical Imaging and Radiation Oncology. 59:695-701
Introduction The radiation dose to the Australian paediatric population as a result of medical imaging is of growing concern, in particular the dose from CT. Estimates of the Australian population dose have largely relied on Medicare Australia statis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b7933cb6db7d0208bb3a7b310355463
https://doi.org/10.1111/1754-9485.12392
https://doi.org/10.1111/1754-9485.12392
Publikováno v:
Radiation Protection Dosimetry. 156:445-450
The largest man-made contributor to the ionising radiation dose to the Australian population is from diagnostic imaging and nuclear medicine. The last estimation of this dose was made in 2004 (1.3 mSv), this paper describes a recent re-evaluation of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41d9f49f6cb94158a4c4f2a6ca8645a7
https://doi.org/10.1093/rpd/nct101
https://doi.org/10.1093/rpd/nct101
Publikováno v:
The British Journal of Radiology. 85:1488-1498
To establish local diagnostic reference levels (LDRLs) at the Royal Children's Hospital (RCH) Melbourne, Parkville, Australia, for typical paediatric CT examinations and compare these with international diagnostic reference levels (DRLs) to benchmark
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d143538ab2f075cd21809741070c268
https://doi.org/10.1259/bjr/28015185
https://doi.org/10.1259/bjr/28015185
Publikováno v:
Australasian Physical & Engineering Sciences in Medicine. 35:117-134
Computed tomography (CT) is the single biggest ionising radiation risk from anthropogenic exposure. Reducing unnecessary carcinogenic risks from this source requires the determination of organ and tissue absorbed doses to estimate detrimental stochas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b19e86b344cddef06a87bdfba7583dc
https://doi.org/10.1007/s13246-012-0134-4
https://doi.org/10.1007/s13246-012-0134-4
Publikováno v:
Radiation Measurements. 46:2031-2034
The use of computed tomography (CT) worldwide is continuing to increase for both adults and children, posing population health risks due to radiation exposure. These risks are highest for children, reducing with age at exposure. Effective dose is a u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea77304cf18a70932b23c0d249d2d2e4
https://doi.org/10.1016/j.radmeas.2011.08.005
https://doi.org/10.1016/j.radmeas.2011.08.005
Autor:
L. N. McDermott, Peter N. Johnston, Tomas Kron, Michael Taylor, Rick Franich, L. Dunn, Jason Callahan
Publikováno v:
Australasian Physical & Engineering Sciences in Medicine. 35:93-100
A commercially available motion phantom (QUASAR, Modus Medical) was modified for programmable motion control with the aim of reproducing patient respiratory motion in one dimension in both the anterior-posterior and superior-inferior directions, as w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::877c614eb9f209c2bfb5c1663d90fc48
https://doi.org/10.1007/s13246-011-0114-0
https://doi.org/10.1007/s13246-011-0114-0
Publikováno v:
Journal of Medical Imaging and Radiation Oncology. 55:132-142
Introduction: The use of CT has rapidly increased since its introduction. Although an important medical tool for diagnosis and treatment, CT is recognised as being among the highest contributors to population radiation exposure. As the risks associat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a62c26aef8a1b4502da971acebf74fe
https://doi.org/10.1111/j.1754-9485.2011.02242.x
https://doi.org/10.1111/j.1754-9485.2011.02242.x
Autor:
Christian M. Langton, Richard Knight, David Schlect, John Kenny, Tanya Kairn, Muhammad Basim Kakakhel, Jamie Trapp, Michael Taylor, Peter N. Johnston, Rick Franich, Trent Aland
Publikováno v:
Physics in Medicine and Biology. 55:N451-N463
This work is focussed on developing a commissioning procedure so that a Monte Carlo model, which uses BEAMnrc's standard VARMLC component module, can be adapted to match a specific BrainLAB m3 micro-multileaf collimator (microMLC). A set of measureme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6203073a278589247a570f3d6fe6c5e
https://doi.org/10.1088/0031-9155/55/17/n01
https://doi.org/10.1088/0031-9155/55/17/n01
Autor:
Christian M. Langton, David Schlect, John Kenny, Andrew Fielding, Scott Crowe, Rick Franich, Peter N. Johnston, Jamie Trapp, Richard Knight, Tanya Kairn
Publikováno v:
Medical Physics. 37:1761-1767
Purpose: The component modules in the standard BEAMnrc distribution may appear to be insufficient to model micro-multileaf collimators that have trifaceted leaf ends and complex leaf profiles. This note indicates, however, that accurate Monte Carlo s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d24684137237a6b10f9e16165b45a12b
https://doi.org/10.1118/1.3355873
https://doi.org/10.1118/1.3355873
Publikováno v:
Medical Physics. 36:3181-3191
When a photon beam passes through the treatment couch or an immobilization device, it may traverse a large air gap (up to 15 cm or more) prior to entering the patient. Previous studies have investigated the ability of various treatment planning syste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba93298f217d50bedeea71df7ae8cda3
https://doi.org/10.1118/1.3147204
https://doi.org/10.1118/1.3147204