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https://www.readbyqxmd.com/read/28343061/automated-diabetic-macular-edema-dme-grading-system-using-dwt-dct-features-and-maculopathy-index
#1
U Rajendra Acharya, Muthu Rama Krishnan Mookiah, Joel E W Koh, Jen Hong Tan, Sulatha V Bhandary, A Krishna Rao, Yuki Hagiwara, Chua Kuang Chua, Augustinus Laude
The cause of diabetic macular edema (DME) is due to prolonged and uncontrolled diabetes mellitus (DM) which affects the vision of diabetic subjects. DME is graded based on the exudate location from the macula. It is clinically diagnosed using fundus images which is tedious and time-consuming. Regular eye screening and subsequent treatment may prevent the vision loss. Hence, in this work, a hybrid system based on Radon transform (RT), discrete wavelet transform (DWT) and discrete cosine transform (DCT) are proposed for an automated detection of DME...
March 19, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28342342/radon-concentration-distributions-in-shallow-and-deep-groundwater-around-the-tachikawa-fault-zone
#2
Fumiaki Tsunomori, Tomoya Shimodate, Tomoki Ide, Hidemi Tanaka
Groundwater radon concentrations around the Tachikawa fault zone were surveyed. The radon concentrations in shallow groundwater samples around the Tachikawa fault segment are comparable to previous studies. The characteristics of the radon concentrations on both sides of the segment are considered to have changed in response to the decrease in groundwater recharge caused by urbanization on the eastern side of the segment. The radon concentrations in deep groundwater samples collected around the Naguri and the Tachikawa fault segments are the same as those of shallow groundwater samples...
March 22, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28340370/validation-of-comet-assay-in-oregon-r-and-wild-type-strains-of-drosophila-melanogaster-exposed-to-a-natural-radioactive-environment-in-brazilian-semiarid-region
#3
Cícero Jorge Verçosa, Aroldo Vieira de Moraes Filho, Ícaro Fillipe de Araújo Castro, Robson Gomes Dos Santos, Kenya Silva Cunha, Daniela de Melo E Silva, Ana Cristina Lauer Garcia, Julio Alejandro Navoni, Viviane Souza do Amaral, Claudia Rohde
Natural radiation of geological origin is a common phenomenon in Brazil, a country where radioactive agents such as uranium may be often found. As an unstable atom, uranium undergoes radioactive decay with the generation of a series of decay by-products, including radon, which may be highly genotoxic and trigger several pathological processes, among which cancer. Because it is a gas, radon may move freely between cracks and gaps in the ground, seeping upwards into the buildings and in the environment. In this study, two Drosophila melanogaster Meigen (Diptera, Drosophilidae) strains called Oregon-R and Wild (collected in a non-radioactive environment) were exposed to atmospheric radiation in the Lajes Pintadas city, in the semiarid zone of northeastern Brazil...
March 21, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28338797/an-estimation-of-the-exposure-of-the-population-of-israel-to-natural-sources-of-ionizing-radiation
#4
L Epstein, J Koch, T Riemer, G Haquin, I Orion
The radiation dose to the population of Israel due to exposure to natural sources of ionizing radiation was assessed. The main contributor to the dose is radon that accounts for 60% of the exposure to natural sources. The dose due to radon inhalation was assessed by combining the results of a radon survey in single-family houses with the results of a survey in apartments in multi-storey buildings. The average annual dose due to radon inhalation was found to be 1.2 mSv. The dose rate due to exposure to cosmic radiation was assessed using a code that calculates the dose rate at different heights above sea level, taking into account the solar cycle...
February 18, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28338643/geographical-correlations-between-indoor-radon-concentration-and-risks-of-lung-cancer-non-hodgkin-s-lymphoma-and-leukemia-during-1999-2008-in-korea
#5
Mina Ha, Seung-Sik Hwang, Sungchan Kang, No-Wook Park, Byung-Uck Chang, Yongjae Kim
Indoor radon is the second most important risk factor for lung cancer and may also be a risk factor for hematopoietic cancers, particularly in children and adolescents. The present study measured indoor radon concentration nationwide at 5553 points during 1989-2009 and spatially interpolated using lognormal kriging. The incidences of lung cancer, non-Hodgkin's lymphoma (NHL), and leukemia, stratified by sex and five-year age groups in each of the 234 administrative regions in the country during 1999-2008, were obtained from the National Cancer Registry and used to calculate the standardized incidence ratios...
March 24, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28327511/a-pilot-study-to-examine-exposure-to-residential-radon-in-under-sampled-census-tracts-of-dekalb-county-georgia-in-2015
#6
Christine E Stauber, Dajun Dai, Sydney R Chan, Jeremy E Diem, Scott R Weaver, Richard Rothenberg
While DeKalb County, Georgia, offers free radon screening for all eligible residents, portions of the county remain relatively under-sampled. This pilot study focused on 10% of the census tracts in the county with the lowest proportion of radon testing; most were in southern DeKalb County. In total, 217 households were recruited and homes were tested for indoor radon concentrations on the lowest livable floor over an eight-week period from March-May 2015. Tract-level characteristics were examined to understand the differences in socio-demographic and economic factors between the pilot study area and the rest of the county...
March 22, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28324685/monitoring-and-descriptive-analysis-of-radon-in-relation-to-seismic-activity-of-northern-pakistan
#7
Zeeshan Jilani, Tahir Mehmood, Aftab Alam, Muhammad Awais, Talat Iqbal
Earthquakes are one of the major causes of natural disasters and its forecasting is challenging task. Some precursory phenomenon exists in theory in relation to earthquakes occurrence. The emission of radioactive gas named 'radon' before the earthquakes is a potential earthquake precursory candidate. The study aims to monitor and to analyze the radon in relation to seismic activity in Northern Pakistan. For this purpose RTM-2200 has been used to monitor the changes in radon concentration from August 01, 2014 to January 31, 2015 in Northern Pakistan...
March 16, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28318756/radon-exposure-and-tumors-of-the-central-nervous-system
#8
Alberto Ruano-Ravina, Ana Dacosta-Urbieta, Juan Miguel Barros-Dios, Karl T Kelsey
OBJECTIVE: To review the published evidence of links between radon exposure and central nervous system tumors through a systematic review of the scientific literature. METHODS: We performed a thorough bibliographic search in Medline (PubMed) and EMBASE. We combined MeSH (Medical Subject Heading) terms and free text. We developed a purpose-designed scale to assess the quality of the included manuscripts. RESULTS: We have included 18 studies, 8 performed on miners, 3 on the general population and 7 on children, and the results have been structured using this classification...
March 15, 2017: Gaceta Sanitaria
https://www.readbyqxmd.com/read/28314163/radon-measurements-and-dose-estimate-of-workers-in-a-manganese-ore-mine
#9
Amin Shahrokhi, Tamás Vigh, Csaba Németh, Anita Csordás, Tibor Kovács
In the new European Basic Safety Standard (EU-BSS), a new reference level for indoor radon concentration in workplaces has recommended that the annual average activity concentration of indoor radon shall not be higher than 300Bqm(-3). This paper describes the radon concentration level in an underground workplace (manganese ore mine) over long time intervals (4 years). Several common radon monitors devices - including NRPB and Raduet (as a passive method based on CR-39), AlphaGUARD PQ 2000Pro, SARAD EQF3220, TESLA and Pylon WLX (as active methods) - were used for continuous radon measurements...
March 10, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28297744/a-permanent-multilevel-monitoring-and-sampling-system-in-the-coastal-groundwater-mixing-zones
#10
Xin Luo, King Lun Kwok, Yi Liu, Jimmy Jiao
To study the spatial and temporal variability of water dynamics and chemical reactions within the coastal groundwater mixing zones (CGMZs), high-resolution periodical and spatial groundwater sampling within CGMZs is needed. However, current samplers and sampling systems may require heavy driving machines to install. There is also possible contamination from the metal materials for current samplers and sampling systems. Here, a permanent multilevel sampling system is designed to sample coastal groundwater within CGMZs...
March 15, 2017: Ground Water
https://www.readbyqxmd.com/read/28287971/fast-2d-convolutions-and-cross-correlations-using-scalable-architectures
#11
Cesar Carranza, Daniel Llamocca, Marios Pattichis
The manuscript describes fast and scalable architectures and associated algorithms for computing convolutions and cross-correlations. The basic idea is to map 2D convolutions and cross-correlations to a collection of 1D convolutions and cross-correlations in the transform domain. This is accomplished through the use of the Discrete Periodic Radon Transform (DPRT) for general kernels and the use of SVD-LU decompositions for low-rank kernels.
March 6, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28285850/study-about-the-radionuclides-implanted-on-glass-surfaces-for-the-estimation-of-retrospective-indoor-radon-concentrations
#12
A Martín Sánchez, J de la Torre Pérez, A B Ruano Sánchez
Indoor radon retrospective dosimetry can be performed by measuring the (210)Po activity concentration deposited on surfaces. An experimental study about the implantation of (210)Po on mirrors exposed to radon has been performed. Two cases were studied: exposure to high and low (222)Rn concentrations. Results were compared with those calculated by using the activity evolution equations. Experimental results can be only explained assuming additional deposition of the long-lived (222)Rn descendants.
March 6, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28281858/very-late-onset-orbital-sarcoma-and-breast-carcinoma-following-retinoblastoma-treatment-with-radon-seed-brachytherapy
#13
Krisztina Emeriewen, Mandeep S Sagoo, Michael Simpson, Yannis Athanasiadis, Judith Kingston, George M Saleh
No abstract text is available yet for this article.
March 10, 2017: Orbit
https://www.readbyqxmd.com/read/28279576/ultra-low-background-and-environmental-measurements-at-laboratorio-subterr%C3%A3-neo-de-canfranc-lsc
#14
I Bandac, S Borjabad, A Ianni, R Nuñez-Lagos, C Pérez, S Rodríguez, J A Villar
To support the construction of experiments at the Laboratorio Subterráneo de Canfranc (LSC) in Spain, an Ultra-Low Background Service (ULBS) and a Copper Electroforming Service (CES) were created. The measurement technique employed at the ULBS is gamma spectroscopy with high purity germanium (HPGe) detectors. A new anti-radon system is being implemented. The main goal of CES is to obtain high-purity copper pieces. A new electroforming set-up inside LSC underground clean room is planned. Radon and environmental measurements at the LSC are presented...
March 4, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28269591/a-compact-representation-for-the-auditory-full-range-response-and-its-fast-denoising-using-an-image-filter-based-on-the-radon-transform
#15
Manuel C Kohl, Daniel J Strauss
The Auditory Brainstem, Middle-Latency and Late Responses, a class of event-related potentials (ERPs), are of considerable interest in neuroscience research as robust neural correlates of different processing stages along the auditory pathway. While most research to date centers around one of the responses at a time for practical reasons, recent efforts indicate a paradigm shift towards acquiring them together, enabling the simultaneous monitoring of all auditory processing stages from the brainstem to the cortex...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28263099/modulation-of-the-peripheral-immune-system-after-low-dose-radon-spa-therapy-detailed-longitudinal-immune-monitoring-of-patients-within-the-rad-on01-study
#16
Paul F Rühle, Roland Wunderlich, Lisa Deloch, Claudia Fournier, Andreas Maier, Gerhart Klein, Rainer Fietkau, Udo S Gaipl, Benjamin Frey
The pain-relieving effects of low-dose radon therapies on patients suffering from chronic painful inflammatory diseases have been described for centuries. Even though it has been suggested that low doses of radiation may attenuate chronic inflammation, the underlying mechanisms remain elusive. Thus, the RAD-ON01 study was initiated to examine the effects of radon spa therapy and its low doses of alpha radiation on the human immune system. In addition to an evaluation of pain parameters, blood was drawn from 100 patients suffering from chronic painful degenerative musculoskeletal diseases before as well as 6, 12, 18, and 30 weeks after the start of therapy...
March 2017: Autoimmunity
https://www.readbyqxmd.com/read/28258321/are-lifetime-affective-disorders-predictive-of-long-term-outcome-in-severe-adolescent-anorexia-nervosa
#17
B Carrot, L Radon, T Hubert, S Vibert, J Duclos, F Curt, N Godart
Depression and anxiety are commonly associated with anorexia nervosa (AN) and contribute to difficulties in social integration, a negative factor for outcome in AN. The link between those disorders and AN has been poorly studied. Thus, our objective was to investigate (1) the link between outcome nine years after hospitalisation for AN and the occurrence of lifetime anxious or depressive comorbidities; (2) the prognostic value of these comorbidities on patient outcome; 181 female patients were hospitalised for AN (between 13 and 22 years old), and were re-evaluated for their psychological, dietary, physical and social outcomes, from 6 to 12 years after their hospitalisation...
March 3, 2017: European Child & Adolescent Psychiatry
https://www.readbyqxmd.com/read/28257398/predictors-and-spatial-variation-of-radon-testing-in-illinois-2005-2012
#18
Whitney E Zahnd, Georgia S Mueller-Luckey, Kendra Ratnapradipa, Tracey Smith
CONTEXT: Radon is the second leading cause of lung cancer, but exposure can be reduced through testing one's home and mitigating if levels are high. OBJECTIVE: To determine what factors predict radon testing and to identify, through spatial analysis, areas in Illinois with lower or higher than expected testing rates. DESIGN, SETTING, PARTICIPANTS, AND MAIN OUTCOMES: An ecological study design was used to evaluate data on radon tests performed in Illinois by a licensed professional or a home radon test kit analyzed by a state-approved laboratory between 2005 and 2012...
March 1, 2017: Journal of Public Health Management and Practice: JPHMP
https://www.readbyqxmd.com/read/28254524/experiences-of-radiological-examinations-of-buildings-in-hungary
#19
Zsolt Homoki, Péter Rell, Zsolt Déri, Gábor Kocsy
Natural radioisotopes occur everywhere in the environment, being a source of exposure to the general population. Everyone is continuously exposed to terrestrial and cosmic radiations both indoors and outdoors, which are the main contributors to external exposure of individuals. There were made many ambient dose rate and indoor gamma radiation and radon concentration measurements in Hungarian by different laboratories. The main goal of the present work is the summarisation and evaluation of the latest results of the Laboratory of National Public Health Center National Research Directorate for Radiobiology and Radiohygiene...
February 27, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28249206/soil-radon-survey-to-assess-napl-contamination-from-an-ancient-spill-do-kerosene-vapors-affect-radon-partition
#20
Gabriele De Simone, Carlo Lucchetti, Francesca Pompilj, Gianfranco Galli, Paola Tuccimei, Pierpaolo Curatolo, Riccardo Giorgi
A soil radon-deficit survey was carried out in a site polluted with kerosene (Rome, Italy) in winter 2016 to assess the contamination due to the NAPL residual component in the vadose zone and to investigate the role of the vapor plume. Radon is indeed more soluble in the residual NAPL than in air or water, but laboratory experiments demonstrated that it is also preferentially partitioned in the NAPL vapors that transport it and may influence soil radon distribution patterns. Specific experimental configurations were designed and applied to a 31-station grid to test this hypothesis; two RAD7 radon monitors were placed in-series and connected to the top of a hollow probe driven up to 80-cm depth; the first instrument was directly attached to the probe and received humid soil gas, which was counted and then conveyed to the second monitor through a desiccant (drierite) cylinder capturing moisture and eventually the NAPL volatile component plus the radon dissolved in vapors...
February 26, 2017: Journal of Environmental Radioactivity
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