نتایج جستجو برای: fetal dosimetry

تعداد نتایج: 95471  

2016
Wazir Muhammad Asad Ullah Khalid Mahmood Matiullah

The purpose of this study was to ensure accuracy in radiation dose delivery, external dosimetry quality audit has an equal importance with routine dosimetry performed at clinics. To do so, dosimetry quality audit was organized by the Secondary Standard Dosimetry Laboratory (SSDL) of Pakistan Institute of Nuclear Science and Technology (PINSTECH) at the national level to investigate and minimize...

Journal: :iranian journal of radiation research 0
m. mirzaii m. mirzaii; nuclear research center for agriculture and medicine (nrcam) p.o.box: 31585-4395 karaj-iran fax : +98-261- 4411106, h. afarideh s.m. haji-saeid g.r. aslani m.r. ensaf

background: thermoluminescence dosimetry is one of the dosimetry procedures used widely as routine and personal dosimeters. in order to extend this kind of dosimeters, dental tissue has been examined and was found promising as a tld dosimeter. materials and methods : in this study, 70 health teeth were collected. the only criterion, which was considered for selection of the teeth, was the healt...

2017
Bryan Muir Wesley Culberson Stephen Davis Gwe‐Ya Kim Yimei Huang Sung‐Woo Lee Jessica Lowenstein Arman Sarfehnia Jeffrey Siebers Naresh Tolani

PURPOSE To present the results and discuss potential insights gained through surveys on reference dosimetry practices. METHODS Two surveys were sent to medical physicists to learn about the current state of reference dosimetry practices at radiation oncology clinics worldwide. A short survey designed to maximize response rate was made publicly available and distributed via the AAPM website an...

2008
Antonio Delgado

Some of the more relevant recent achievements and developments in the field of external radiation dosimetry are reviewed in this presentation. Among them, topics related to personal dosimetry, as the relative role of active and passive methods and the features of some recently proposed new methods. Electronic personal dosemeters and Optically Stimulated Luminescence, OSL, have already accredite...

2014
Emelie Adolfsson Mattias Karlsson

Lithium formate has shown to be a material with properties suitable for electron paramagnetic resonance (EPR) dosimetry, among them up to 7 times higher sensitivity compared to alanine, which is a well-established EPR detector material for dose determinations in radiotherapy. The aim of this thesis was to further investigate the properties of lithium formate and develop the dosimetry system tow...

Journal: :iranian journal of radiation research 0
m. atarod department of medical physics, isfahan university of medical sciences, isfahan, iran p. shokrani department of medical physics, isfahan university of medical sciences, isfahan, iran a. pourmoghadas carleton university, ottawa, canada

background: in most cancer cases, the treatment choice for a pregnant patient is radiotherapy. in these patients, the abdomen is usually not exposed therefore fetus exposure is due to peripheral dose (pd). the purpose of this study was to estimate the fetal dose (the maximum pd in each pregnancy stage) for modalities available and to fabricate and evaluate a generally applicable fetal shield. m...

2014
Austin N. Kirschner Vythialingam Sathiaseelan Yunkai Zhang James David John A. Kalapurakal

PURPOSE While there are several reports of prostate multisector dosimetry data obtained from CT or MRI scans performed at intervals ranging from 14-70 days after prostate brachytherapy (PB), there are no reports on multisector dosimetry performed in the immediate post-implant period. This study was undertaken to determine the results of prostate multisector dosimetry performed in the immediate ...

2009
M. F. Desrosiers J. M. Puhl

Over the course of the last decade, routine monitoring of the alanine dosimetry system revealed a small but significant observation that, after examination, led to the characterization of a previously unknown absorbed-dose-dependent, dose-rate effect for the alanine system. The newly discovered rate effect is of potential concern for electron-beam dosimetry, since electron-beam dosimetry typica...

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