Experience from retrospective radon exposure estimations for individuals in a radon epidemiological study using solid-state nuclear track detectors

Falk, Rolf; Almrén, Katinka; Östergren, I.

doi:10.1016/s0048-9697(01)00665-9

Cited by 23 publications

(12 citation statements)

References 7 publications

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“…The third one is the CR-LR difference method [175,176]. Two different detectors, CR-39 and LR 115, are used side by side on the glass object.…”

Section: Measuring Techniquesmentioning

confidence: 99%

“…McLaughlin [181] described the procedures as well as the criteria for choosing of the objects to be investigated for retrospective dosimetry. Falk et al [176] compared the average radon levels estimated using the CR-LR difference method with the contemporary measurements, and found a correlation given by r 2 = 0.53. Birovljev et al [182] performed retrospective radon dosimetry based on the 210 Po incorporated in the surface in Norwegian dwellings.…”

Section: Applications Of Retrospective Radon Dosimetrymentioning

confidence: 99%

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Formation and growth of tracks in nuclear track materials

Nikezić

2004

Materials Science and Engineering: R: Reports

369

163

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This paper reviews some aspects of solid-state nuclear track detectors (SSNTDs) and their applications in the radon and other research fields. Several geometrical models for the track growth given in the literature are described and compared. It is found that different models give close results for the dimensions of track openings.One of the main parameters that govern track formation is the bulk etch rate V b . Dependences of V b on different parameters such as the preparation procedures, etching conditions, irradiation before etching, etc. are examined. A review of existing methods for determination of the bulk etch rate and track etch rate V t is also given. Examples of V t functions for some detectors are presented. Some unsolved questions related to V t and some contradictory experimental results published in the literature are also summarized in the paper.Applications of SSNTDs for radon and progeny measurements are discussed. New designs of diffusion chambers that have appeared in the last few years are portrayed. A review of analytical and Monte Carlo methods for the calculation of the calibration factors in radon measurements is presented.Particular attention has been given to methods of long-term passive measurements of radon progeny with SSNTDs. These measurements are rather difficult and there is not yet a widely accepted solution. One possible solution based on the LR 115 SSNTD is outlined here.Methods for retrospective radon measurements are also described. Various applications of SSNTDs in other fields of physics and other sciences are briefly reviewed at the end of the paper. #

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“…The third one is the CR-LR difference method [175,176]. Two different detectors, CR-39 and LR 115, are used side by side on the glass object.…”

Section: Measuring Techniquesmentioning

confidence: 99%

Section: Applications Of Retrospective Radon Dosimetrymentioning

confidence: 99%

Formation and growth of tracks in nuclear track materials

Nikezić

2004

Materials Science and Engineering: R: Reports

369

163

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“…Some of these track-etch retro devices may also, besides implanted 210 Po, register the local plate out rate of short-lived progenies onto the glass sheet analysed [13,14]. The advancement of these cost-effective in-situ retro devices has made it possible to practice the glass-polonium technique in large-scale radon epidemiological investigations in homes [13,[15][16][17].…”

Section: Indoor Surfacesmentioning

confidence: 99%

Radon retrospective measurements

Samuelsson

2005

International Congress Series

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“…One, the LR -115 detector (cellulose nitrate ), is sensitive to alpha energies in the range of the natural background alpha activity in glass, while the other, the CR -39 detector ( polyallydiglycol carbonate ), is sensitive to both the 210 Po alpha activity (a progeny of 210 Pb ) and the background alpha activity. The activity due to 210 Po alone can thus be obtained by subtraction of the background activity (Falk et al, 1996;Falk et al, 2001 ). A trained technician installed the detectors on the glass and removed them at the end of the exposure period.…”

Section: Glass -Based Exposure Estimationmentioning

confidence: 99%

“…Following normalization of the surface activity to a common duration of exposure for glass objects (i.e., calculating for each object the surface activity it would have presented if it had been in the same environment for a specified duration common for all objects, e.g., 20 years ), a single calibration factor is applied to translate surface activity into average radon concentration. The calibration factor is presently estimated to be equal to 42 in Sweden (based on the median of ratios of previous air and surface measurements), i.e., a surface 210 Po activity of 1 Bq m À 2 is taken to reflect a constant environment of 42 Bq m À 3 during 20 years (Falk et al, 2001). The calibration factor may be individually modified to account for factors affecting the plate-out rate ( e.g., aerosol concentration, surface/ volume ratio of the room, ventilation ).…”

Section: Glass -Based Exposure Estimationmentioning

confidence: 99%

Glass-based radon-exposure assessment and lung cancer risk

Lagarde

Falk²,

Almrén

et al. 2002

J Expo Sci Environ Epidemiol

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Lung cancer risk estimation in relation to residential radon exposure remains uncertain, partly as a result of imprecision in air -based retrospective radonexposure assessment in epidemiological studies. A recently developed methodology provides estimates for past radon concentrations and involves measurement of the surface activity of a glass object that has been in a subject's dwellings through the period for exposure assessment. Such glass measurements were performed for 110 lung cancer subjects, diagnosed 1985 to 1995, and for 231 control subjects, recruited in a case -control study of residential radon and lung cancer among never -smokers in Sweden. The relative risks ( with 95% confidence intervals ) of lung cancer in relation to categories of surface -based average domestic radon concentration during three decades, delimited by cutpoints at 50, 80, and 140 Bq m À 3 , were 1.60 ( 0.8 to 3.4 ), 1.96 ( 0.9 to 4.2 ), and 2.20 ( 0.9 to 5.6 ), respectively, with average radon concentrations below 50 Bq m À 3 used as reference category, and with adjustment for other risk factors. These relative risks, and the excess relative risk ( ERR ) of 75% ( À 4% to 430% ) per 100 Bq m À 3 obtained when using a continuous variable for surface -based average radon concentration estimates, were about twice the size of the corresponding relative risks obtained among these subjects when using air -based average radon concentration estimates. This suggests that surface -based estimates may provide a more relevant exposure proxy than air -based estimates for relating past radon exposure to lung cancer risk.

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Experience from retrospective radon exposure estimations for individuals in a radon epidemiological study using solid-state nuclear track detectors

Cited by 23 publications

References 7 publications

Formation and growth of tracks in nuclear track materials

Formation and growth of tracks in nuclear track materials

Radon retrospective measurements

Glass-based radon-exposure assessment and lung cancer risk

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