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Radiation Protection Dosimetry

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https://www.readbyqxmd.com/read/28204795/radon-in-us-workplaces-a-review
#1
Robert D Daniels, Mary K Schubauer-Berigan
No abstract text is available yet for this article.
February 16, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28204793/neutron-and-photon-dose-mapping-of-a-dd-neutron-generator
#2
Walid A Metwally, Osama A Taqatqa, Mohammed M Ballaith, Allan X Chen, Melvin A Piestrup
No abstract text is available yet for this article.
February 16, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28204777/effective-dose-in-two-different-dental-cbct-systems-newtom-vgi-and-planmeca-3d-mid
#3
Mohammad Ghaedizirgar, Reza Faghihi, Reza Paydar, Sedigheh Sina
No abstract text is available yet for this article.
February 16, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28204766/comparison-of-monoenergetic-photon-organ-dose-rate-coefficients-for-the-female-stylized-and-voxel-phantoms-submerged-in-air
#4
Mauritius Hiller, Shaheen Azim Dewji
No abstract text is available yet for this article.
February 16, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28204745/effective-dose-per-unit-kerma-area-product-conversion-factors-in-adults-undergoing-modified-barium-swallow-studies
#5
Heather Shaw Bonilha, Janina Wilmskoetter, Sameer V Tipnis, Bonnie Martin-Harris, Walter Huda
No abstract text is available yet for this article.
February 16, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28204779/development-of-real-time-radiation-exposure-dosimetry-system-using-synthetic-ruby-for-interventional-radiology
#6
Yoshiyuki Hosokai, Kenki Matsumoto, Masataka Kozakai, Kaito Takahashi, Akihito Usui, Thet Pe Win, Kenzo Muroi, Haruo Saito
No abstract text is available yet for this article.
February 14, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28204769/information-management-system-supporting-a-multiple-property-survey-program-with-legacy-radioactive-contamination
#7
Ron Stager, Douglas Chambers, Gerd Wiatzka, Monica Dupre, Micah Callough, John Benson, Erwin Santiago, Walter van Veen
No abstract text is available yet for this article.
February 13, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28160008/estimation-of-the-cumulative-exposure-frequency-and-cumulative-effective-dose-of-diagnostic-medical-radiation-in-the-korean-population-from-2002-to-2010
#8
Jong-Won Gil, So Young Kim, Woo-Yoon Park, Won-Dong Kim, Young-Sung Lee, Gil-Won Kang, Dong-Wook Shin, Chan-Young Park, Jong-Hyock Park
No abstract text is available yet for this article.
February 4, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28160003/a-discussion-on-different-approaches-for-assessing-lifetime-risks-of-radon-induced-lung-cancer
#9
Jing Chen, Christophe Murith, Martha Palacios, Chunhong Wang, Senlin Liu
No abstract text is available yet for this article.
February 4, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28115660/investigation-of-the-influence-of-the-position-inside-a-small-aircraft-on-the-cosmic-radiation-induced-dose
#10
A C M Prado, M T Pazianotto, O L Gonçalez, L R Dos Santos, A D Caldeira, H H C Pereira, G Hubert, C A Federico
This article report the measurements on-board a small aircraft at the same altitude and around the same geographic coordinates. The measurements of Ambient Dose Equivalent Rate (H*(10)) were performed in several positions inside the aircraft, close and far from the pilot location and the discrimination between neutron and non-neutron components. The results show that the neutrons are attenuated close to fuel depots and the non-neutron component appears to have the opposite behavior inside the aircraft. These experimental results are also confronted with results from Monte Carlo simulation, obtained with the MCNPX code, using a simplified model of the Learjet-type aircraft and a modeling of the standard atmosphere, which reproduces the real energy and angular distribution of the particles...
January 23, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28115659/deep-shallow-and-eye-lens-doses-from-106ru-106rh-a-comparsion
#11
Munish Kumar, A K Bakshi, R B Rakesh, P Ratna, M S Kulkarni, D Datta
(106)Ru/(106)Rh is unique amongst other commonly used beta sources such as (147)Pm, (85)Kr, (204)Tl, (32)P, (nat)U and (90)Sr/(90)Y in the sense that it is capable of simultaneously delivering shallow/skin, eye lens and deep/whole body doses (WBDs) and they differ from each other substantially. In view of this, the investigation of various quantities defined for individual monitoring is possible and this makes (106)Ru/(106)Rh beta source, a classical example in radiation protection and dosimetry. This led us to estimate skin, eye lens and WBDs for (106)Ru/(106)Rh beta source...
January 23, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28115658/radiation-exposure-to-operators-performing-pharmacologic-stress-testing-in-99mtc-myocardial-perfusion-imaging-a-prospective-study
#12
Tadaki Nakahara, Yu Iwabuchi, Mari Katagiri, Yohji Matsusaka, Kazunari Itoh, Yuji Ogata, Masahiro Jinzaki
This prospective study investigated radiation exposure dose (RED) to main operator (MO) and supervisory operator (SO) performing dypiridamole stress testing in a 1-d rest/stress (99m)Tc tetrofosmin single-photon emission computed tomography (SPECT) of consecutive 42 patients. MO was instructed to be close to the patients during the entire procedures including the vasodilator and radiotracer injection. SO mainly recorded the data on the procedures apart from the patients. RED, procedure time (PT) and internal radioactivity (IR) of patients were measured before and after a secondary tracer injection for stress SPECT, respectively...
January 23, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28115657/cumulative-effective-and-individual-organ-dose-levels-in-paediatric-patients-undergoing-multiple-catheterisations-for-congenital-heart-disease
#13
T P Jones, P C Brennan, E Ryan
This study examines the cumulative radiation dose levels received by a group of children who underwent multiple cardiac catheterisation procedures during the investigation and management of congenital heart disease (CHD). The purpose is to calculate cumulative doses, identify higher dose individuals, outline the inconsistencies with risk assessment and encourage the establishment of dose databases in order to facilitate the longitudinal research necessary to better understand health risks. A retrospective review of patient records for 117 paediatric patients who have undergone two or more cardiac catheterisations for the investigation of CHD was undertaken...
January 23, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28115656/human-kidney-and-skeleton-uranium-burden-radiation-dose-and-health-risks-from-high-uranium-contents-in-drinking-water-of-bathinda-district-malwa-region-of-punjab-state-india
#14
Nisha Sharma, Jaspal Singh
Uranium concentration has been measured in drinking water samples from the Bathinda district. It ranges from 2.4 to 529 µg/l with a mean value of 120 µg/l. The mean uranium kidney burden for children and adults is 0.0838 and 0.059 µg U/g, respectively, which crosses the safe limit of 0.02 µg U/g. The mean values for skeleton burden are 1925.7 µg for children and 4108.2 µg for an adult. These values are 32 and 69 times higher than the skeleton burden of 59.4 µg for a normal adult. Radiological and chemical risk is also found to be higher than the recommended values...
January 23, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28100671/fast-neutron-survey-with-compact-plastic-scintillation-detectors
#15
Rhys M Preston, James R Tickner
With the rise of the Silicon Photomultiplier (SiPM), it is now practical to build compact scintillation detectors well suited to portable use. A prototype survey meter for fast-neutrons and gamma-rays, based around an EJ-299-34 plastic scintillator with SiPM readout, has been developed and tested. A custom digital pulse processor was used to perform pulse shape discrimination on-the-fly. Ambient dose equivalent H*(10) was calculated by means of two energy-dependent 'G-functions'. The sensitivity was calculated to be between 0...
January 17, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28100670/two-new-single-exposure-multi-detector-neutron-spectrometers-for-radiation-protection-applications-in-workplace-monitoring
#16
J M Gómez-Ros, R Bedogni, D Bortot, C Domingo, A Esposito, M V Introini, M Lorenzoli, G Mazzitelli, M Moraleda, A Pola, D Sacco
This communication describes two new instruments, based on multiple active thermal neutron detectors arranged within a single moderator, that permit to unfold the neutron spectrum (from thermal to hundreds of MeV) and to determine the corresponding integral quantities with only one exposure. This makes them especially advantageous for neutron field characterisation and workplace monitoring in neutron-producing facilities. One of the devices has spherical geometry and nearly isotropic response, the other one has cylindrical symmetry and it is only sensitive to neutrons incident along the cylinder axis...
January 17, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28096315/experimental-optimization-of-exposure-index-and-quality-of-service-in-wlan-networks
#17
David Plets, Günter Vermeeren, Eli De Poorter, Ingrid Moerman, Sotirios K Goudos, Martens Luc, Joseph Wout
This paper presents the first real-life optimization of the Exposure Index (EI). A genetic optimization algorithm is developed and applied to three real-life Wireless Local Area Network scenarios in an experimental testbed. The optimization accounts for downlink, uplink and uplink of other users, for realistic duty cycles, and ensures a sufficient Quality of Service to all users. EI reductions up to 97.5% compared to a reference configuration can be achieved in a downlink-only scenario, in combination with an improved Quality of Service...
January 17, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28096314/exposure-to-recycled-uranium-contaminants-in-gaseous-diffusion-plants
#18
Jeri L Anderson, A Iulian Apostoaei, James H Yiin, Chih-Yu Tseng
As part of an ongoing study of health effects in a pooled cohort of gaseous diffusion plant workers, organ dose from internal exposure to uranium was evaluated. Due to the introduction of recycled uranium into the plants, there was also potential for exposure to radiologically significant levels of (99)Tc, (237)Np and (238,239)Pu. In the evaluation of dose response, these radionuclide exposures could confound the effect of internal uranium. Using urine bioassay data for study subjects reported in facility records, intakes and absorbed dose to bone surface, red bone marrow and kidneys were estimated as these organs were associated with a priori outcomes of interest...
January 16, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28096313/opportunities-to-reduce-ct-radiation-exposure-experience-over-5-years-at-the-nih-clinical-center
#19
William C Kovacs, Jianhua Yao, David A Bluemke, Les R Folio
Our current study was undertaken in order to compare CT exposures during various dose-reduction initiatives at the National Institutes of Health Clinical center, to show trends in exposure reduction over a 5-y period, and to provide benchmarks that other facilities may use. Using an in-house extraction tool (Radiation Exposure Extraction Engine), we derived CT exposure data from Digital Imaging and Communications in Medicine (DICOM) headers over 5 y. We present parameters used and compare most common exams between 2010 and 2015...
January 16, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28096312/analysis-of-thermoluminescence-glow-curves-using-derivatives-of-different-orders
#20
Mahua Karmakar, S Bhattacharyya, A Sarkar, P S Mazumdar, S D Singh
The suitability of the second derivative method for locating component peaks in complex thermoluminescence (TL) glow curves has been investigated in this work by considering both numerically simulated and experimental TL peaks. This technique is useful to acquire knowledge of the number of component peaks in a complex TL curve which in turn serves as a basic information before applying the deconvolution technique to the glow curve. To check the consistency of the results so obtained, we have also applied the first derivative technique to TL glow curves...
January 16, 2017: Radiation Protection Dosimetry
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