Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “RADIATION MONITORING”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 55 records · Page 3Linked to original sources
PubMed1977

[Radiation monitoring in the area of metallic dental replacement during cobalt 60 gamma radiation and in electron radiation of oral tumors].

In the radiotherapy of malignant tumors of the oral cavity, the exact distribution of radiation dosage in the neighborhood of metallic dental replacement has been uncertain so far. Many authors therefore asked that crowns and bridges be removed before radiotherapy. By means of lithium fluoride thermo-luminescence dosimetry, punctate measurements of doses are possible for the first time. In view of the dose values obtained, removal of metallic dental replacement before the beginning of radiotherapy as a prophylactic measure to prevent radioosteomyelitis appears not to be necessary.

Cobalt Radioisotopes↗
PubMed2003

Fluctuations of exposure rate at regional radiation monitoring stations in Korea.

Based on hourly means of exposure rate between August 2000 and July 2001 at nine Regional Radiation Monitoring Stations (RRMS) in Korea, we analyzed spatio-temporal characteristics of exposure rate. The mean and fluctuations of exposure rates were 99 and 3.8 nGy h(-1), respectively. The hourly exposure rate over 9 RRMS indicated a diurnal pattern with the exposure rates reaching a maximum between 5:00 and 8:00 a.m. in the early morning and a broad minimum between 4:00 and 10:00 p.m. in the afternoon. The fluctuations of exposure rate in the inland areas were less than 3.2 nGy h(-1), and those of exposure rate in coastal areas were larger than 3.9 nGy h(-1). The frequency distribution of exposure rates had one peak around the mean and was to be skewed to the right or positively skewed and its tails were fatter than those of a normal distribution. The interrelations of exposure rates at each station generally decreased with the distance between the stations. Empirical orthogonal function (EOF) analysis showed that almost all (99.9%) of exposure rate fluctuations were described by simultaneous variations. The spatial distribution of the first EOF modes of actual, low-pass (periods longer than one month) and high-pass (periods shorter than one month) exposure rate series were similar to each other.

Environmental Exposure↗
PubMed1993

Guidelines for personnel radiation monitoring in the cardiac catheterization laboratory. Laboratory Performance Standards Committee of the Society for Cardiac Angiography and Interventions.

The Laboratory Performance Standards Committee of the Society for Cardiac Angiography and Interventions has devised guidelines to inform catheterization laboratory personnel about appropriate radiation monitoring and protection. A personal monitoring dosimeter must be placed over any radiation protective garments on the collar near the thyroid. A second dosimeter, worn at the waist level under any radiation protective garments, is mandatory for any declared pregnant workers exposed to radiation. This dosimeter is recommended, but not required, for all personnel in the catheterization laboratory. The limit for whole body radiation exposure is stated in terms of the effective dose equivalent (EDE). Different formulas are used for calculating the EDE, depending on the number of dosimeters worn simultaneously by the individual. Finger dosimeters should be worn by personnel whose hands are likely to be directly exposed to the x-ray beam. Initial and periodic training in radiation protection is a part of good laboratory practice.

Cardiac Catheterization↗
PubMedDate not supplied

[Results of radiation monitoring in Moscow].

The results of assessing the radiation situation due to global fallouts, obtained from measurement of 137Cs and 90Sr in over 400 samples from natural environmental objects in Moscow in 1979-1999 have indicated that the levels of the substances in the atmospheric fallouts are in agreement with the mean Russian levels and the mean annual activity of these radionuclides in the ambient air are 6 orders lower than the allowable values laid down in NRB-99. In Moscow, the mean effective dose of external exposure to natural and cosmogenic radionuclides is no greater than 1 m3v a year. The individual effective doses of internal and external exposures of the population to global fallouts averages 13 mu k3v a year.

Air Pollutants, Radioactive↗
PubMed2004

Differences in mortality by radiation monitoring status in an expanded cohort of Portsmouth Naval Shipyard workers.

Studies of leukemia and lung cancer mortality at the Portsmouth Naval Shipyard (PNS) have yielded conflicting results. In an expanded cohort of PNS workers employed between 1952 and 1992 and followed through 1996, the all-cause standardized mortality ratio (SMR) was 0.95 (95% confidence interval, 0.93-0.96). Employment duration SMRs were elevated with confidence intervals excluding 1.00 for lung cancer, esophageal cancer, and all cancers combined. Leukemia mortality was as expected overall, but standardized rate ratio analyses showed a significant positive linear trend with increasing external radiation dose. The role of solvent exposures could not be evaluated. Findings differed by radiation monitoring subcohort, with excess asbestosis deaths limited to radiation workers and several smoking-related causes of death higher among nonmonitored workers. At PNS, asbestos exposure and possibly smoking could be nonrandomly distributed with respect to radiation exposure, suggesting potential for confounding in internal analyses of an occupational cohort.

Adult↗
PubMed2006

Compact fluorescent lamp phosphors in accidental radiation monitoring.

The application of lamp phosphors for accidental dosimetry is a new concept. Since the materials used in fluorescent lamps are good photo luminescent materials, if one can either use the inherent defects present in the phosphor or add suitable modifiers to induce thermoluminescence (TL) in these phosphors, then the device (fluorescent lamp) can be used as an accidental dosemeter. In continuation of our search for a suitable phosphor material, which can serve both as an efficient lamp phosphor and as a good radiation monitoring device, detailed examination has been carried out on cerium and terbium-doped lanthanum phosphate material. A (90)Sr beta source with 50 mCi strength (1.85 GBq) was used as the irradiation source for TL studies. The TL response as a function of dose received was examined for all phosphors used and it was observed that the intensity of the TL peak vs. dose received was a linear function in the dose range 0.1-200 Gy in each case. Incidentally LaPO(4): Ce,Tb is a component of the compact fluorescent lamp marketed recently as an energy bright light source. Besides having very good luminescence efficiency, good dosimetric properties of these phosphors render them useful for their use in accidental dosimetry also.

Beta Particles↗
PubMed1990

A solar erythemal radiation monitoring programme in New Zealand and Queensland, Australia.

Solar erythemal radiation dose measurements carried out at five locations in Australasia from 43 degrees S to 19 degrees S during the southern summer of 1984-85 are reported. Monthly erythemal doses at the New Zealand sites reached a maximum of 8 x 10(4) joules/m2 for January and February 1985. During February 1985 this dose was the same as that measured at Townsville, Queensland, and slightly greater than the 7.3 x 10(4) joules/m2 at Rockhampton, Queensland. These results highlight the difficulty of calculating levels of solar erythemal radiation based on the latitude of the site because of local variations in cloud cover patterns.

Atmosphere↗