Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Ronald E. Tosh"'
Autor:
H. Heather Chen-Mayer, Ronald E. Tosh, Fred B. Bateman, Paul M. Bergstrom, Brian E. Zimmerman
Publikováno v:
Journal of Research of the National Institute of Standards and Technology. 126
A portable calorimeter for direct realization of absorbed dose in medical computed tomography (CT) procedures was constructed and tested in a positron emission tomography (PET) CT scanner. The calorimeter consists of two small thermistors embedded in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa62eadd456d2ae2b5fbdf147f9c82ae
https://doi.org/10.6028/jres.126.054
https://doi.org/10.6028/jres.126.054
Publikováno v:
Applied Radiation and Isotopes. 134:376-379
The detection efficiency for large area alpha sources with adjustable heights of a raised lip around the edge were measured by 2 π gas-filled proportional counter. The variations in low-energy spectral shape were modeled using a Geant4 radiation and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83663326216931b93f701728ef56d8e0
https://doi.org/10.1016/j.apradiso.2017.08.030
https://doi.org/10.1016/j.apradiso.2017.08.030
Autor:
Ronald E. Tosh, Ryan P. Fitzgerald, Denis E. Bergeron, Nikolai N. Klimov, Daniel Schmidt, Zeeshan Ahmed
Publikováno v:
Measurement: Sensors, Vol 18, Iss, Pp 100295-(2021)
With the recent redefinition of the SI base units in terms of constants of nature, the race is on to maximize achievable precision by developing primary standards based on quantum metrology, thereby to realize the Quantum SI. For the becquerel (Bq) a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd73004fadf5bf063fe1d2f49e30f3ff
https://doi.org/10.1016/j.measen.2021.100295
https://doi.org/10.1016/j.measen.2021.100295
Publikováno v:
Journal of testing and evaluation. 46
ASTM F792, Standard Practice for Evaluating the Imaging Performance of Security X-ray Systems, provides test objects and methods for measuring the imaging performance of cabinet X-ray systems used at security checkpoints. The standard is widely used,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7251723fa55e09d6aaad8535a9e4f600
https://pubmed.ncbi.nlm.nih.gov/31092961
https://pubmed.ncbi.nlm.nih.gov/31092961
Autor:
Ryan P. Fitzgerald, Ronald E. Tosh, Ileana M. Pazos, Zeeshan Ahmed, Nikolai N. Klimov, Lonnie T. Cumberland, Fred B. Bateman
Publikováno v:
Frontiers in Optics + Laser Science APS/DLS.
We have examined the impact of cobalt-60 γ-ray radiation up to 1 megagray absorbed dose on silicon photonic devices. We do not find any systematic impact of radiation, indicating the durability of silicon photonics devices under harsh conditions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4147cb4ce36c6cb276feb887641ec44b
https://doi.org/10.1364/fio.2019.fw5c.5
https://doi.org/10.1364/fio.2019.fw5c.5
Autor:
Ronald E. Tosh, Nikolai N. Klimov, Zeeshan Ahmed, Lonnie T. Cumberland, Ileana M. Pazos, Ryan P. Fitzgerald
Publikováno v:
Scientific Reports, Vol 8, Iss 1, Pp 1-7 (2018)
Scientific Reports
Scientific Reports
In recent years, silicon photonic platforms have undergone rapid maturation enabling not only optical communication but complex scientific experiments ranging from sensors applications to fundamental physics investigations. There is considerable inte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6e39529b377d418d4b756021b6bb641
https://doi.org/10.1038/s41598-018-31286-9
https://doi.org/10.1038/s41598-018-31286-9
Publikováno v:
Medical physics. 39(6Part4)
Purpose:Radiation dose in CT is traditionally evaluated using an ionization chamber calibrated in terms of air kerma in a phantom of specific dimensions. The radiation absorbed dose, J/kg, can also be realized directly by measuring the temperature ri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::730a8195af34ff04e2ccd31ab59a2664
https://pubmed.ncbi.nlm.nih.gov/28519496
https://pubmed.ncbi.nlm.nih.gov/28519496
Autor:
Frank Cerra, Ronald E. Tosh, Ronaldo Minniti, Stephen M. Seltzer, Fred B. Bateman, Lawrence T. Hudson, Paul M. Bergstrom, Jack L. Glover
Publikováno v:
Applied Radiation and Isotopes. 70:1037-1041
Recent years have seen a dramatic expansion in the application of radiation and isotopes to security screening. This has been driven primarily by increased incidents involving improvised explosive devices as well as their ease of assembly and leverag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07aa569a5f7a2e4e281f75a8604461b3
https://doi.org/10.1016/j.apradiso.2011.11.029
https://doi.org/10.1016/j.apradiso.2011.11.029
Autor:
Ronald E. Tosh, Huaiyu H. Chen-Mayer
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 652:896-900
The most fundamental method for determining the absorbed dose to water by radiation beams is by measuring the consequent temperature increase of the water. Water calorimeters used for this purpose are not irradiated uniformly; thus spatial dose gradi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8352e925f6d662fb2cf7fa7d3983183d
https://doi.org/10.1016/j.nima.2010.08.037
https://doi.org/10.1016/j.nima.2010.08.037
Publikováno v:
Metrologia. 47:208-218
This paper presents a practical ultrasonic system for near real-time imaging of spatial temperature distributions in water caused by absorption of radiation. Initial testing with radiation from a highly attenuated infrared lamp demonstrates that the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::442688c9f936d377f7ad8eec64373e95
https://doi.org/10.1088/0026-1394/47/3/011
https://doi.org/10.1088/0026-1394/47/3/011