The performance of the NRPB thermoluminescent dosimeter

Marshall, T.O.; Pattison, R.J.; Twyman, A.; Preston, H.E.; Stewart, Jelena

doi:10.1016/0029-554x(80)90286-4

Cited by 4 publications

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“…This complicates beta dosimetry by making difficult the matching of detector response with tissue dose. Such matching is normally achieved by setting the depth of the detecting element from the detector's outer surface to correspond to the depth of the sensitive tissue below the body surface (Dennis et a1 1974, Shaw and Wall 1977, Gupta and Cusimano 1981.…”

Section: Introductionmentioning

confidence: 99%

Effective depth of spermatogonia in man I. Measurement of scrotal thickness

Casey¹,

Jewett²,

Facey³

1982

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Dosimetry for sperm cells irradiated by high-energy betas requires precise knowledge of the effective depth of the spermatogonia, and hence the thickness of overlying tissues (scrotum plus tunics), because beta dose rate changes very rapidly with depth. Measurements were made on 25 volunteers and surgical patients by mechanical caliper during surgery (2), by ultrasound (14), or by both (9), all at 20 degrees C air temperature. The tunica albuginea (TA) measured 0.1 mm. The surgical results (TA excluded) were 2.0 mm, sigma = 0.3 mm (n = 11). The ultrasound results (TA included) were 2.2 mm, sigma = 0.6 mm (n = 23). There was no correlation of scrotal thickness with age (24-83 years) and only a very weak correlation (r = 0.3) with body mass. There was no decrease in scrotal thickness (at 20 degrees C) with further warming but there was an increase (to 3.3 mm from 2.3 mm) with chilling before measurement. Ultrasound is shown to be valid for such measurements.

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Section: Introductionmentioning

confidence: 99%

Effective depth of spermatogonia in man I. Measurement of scrotal thickness

Casey¹,

Jewett²,

Facey³

1982

pmb

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Thermoluminescence dosimetry applied to radiation protection

Christensen

Bøtter‐Jensen

Majborn

1982

The International Journal of Applied Radiation and Isotopes

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Response of thermoluminescence dosemeters to beta radiation and skin dose assessment

1984

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The response of a TL dosemeter to beta radiation is heavily influenced by the absorption of the radiation in the dosemeter thickness. As a consequence, the assessment of skin dose depends either on the execution of a calibration with a beta field of the same characteristics as that to be monitored or on the knowledge of depth-dose distribution in the dosemeter. Depth-dose distributions have been experimentally estimated for optically transparent dosemeters in a number of irradiation geometries and with sources of different configuration and energy. General algorithms based on the point-source function of Loevinger have been developed, by which the response of TL dosemeters can be evaluated and skin dose correction factors derived. TLD responses to beta radiation calculated by the present method are in sound agreement with other author's measurements. The dependence of beta ray absorption on the configuration of source and the source-to-detector distance has been picked up. Variations of source-to-detector distance as large as 30% of the maximum beta range account for differences up to 40% in the skin dose correction factors for a 200 mg cm-2 thick dosemeter. The proposed scheme results in a useful tool in skin beta dosimetry using multiple TLDs behind different absorbers. In practical applications thick dosemeters may be used properly only in well-known radiation fields. Conversely, the described method allows an acceptable estimate of the skin dose error.

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The performance of the NRPB thermoluminescent dosimeter

Cited by 4 publications

References 0 publications

Effective depth of spermatogonia in man I. Measurement of scrotal thickness

Effective depth of spermatogonia in man I. Measurement of scrotal thickness

Thermoluminescence dosimetry applied to radiation protection

Response of thermoluminescence dosemeters to beta radiation and skin dose assessment

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