Whole-body Counting of Persons Containing 90Sr and 226Ra

Wenger, Pierre; Bengtsson, L.G.; Dudley, Robert; Godfrey, Bob; Karniewicz, W.; Lenge, V.

doi:10.1097/00004032-196803000-00004

Cited by 7 publications

(10 citation statements)

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“…There has been renewed interest in the metabolism of strontium in man (Wenger et al, 1968;Dudley and BenHaim, 1968;Evans et al, 1969;Czosnowska et al, 1972;Marshall et al, 1973;Holtzman et al, 1975;Ilyin et al, 1975;Wenger and Soucas, 1975). Body burdens of 9°Sr in excess of about 0.1 ~Ci can be detected in the skeletons of living humans by means of the bremsstrahlung x-rays produced by the /3-decay of 9°Sr and its daughter 90y (Van Dilla et al, 1955;Mays et al, 1958;Rundo, 1959;Lid~n, 1959;Cohn, 1963).…”

Section: Introductionmentioning

confidence: 99%

9OSr +90Y bremsstrahlung efficiency predicted for humans

Lloyd

Mays

Atherton

et al. 1976

Radiat Environ Biophys

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Bremsstrahlung x-rays are produced when energetic beta-particles are emitted and absorbed. Measurements of total-body bremsstrahlung efficiencey (x-ray photon output per muCi 90Sr in the body, relative to that in water) have been made in the intact mouse, rat, rabbit, and dog sacrificed 2 weeks after the injection of 90Sr + 85Sr. Efficiencies were determined by a comparison of the bremsstrahlung output from 90Sr + its daughter 90Y and the gamma-ray emission of 85Sr. Results were checked by a beta-assay of the ashed animals. Bremsstrahlung efficiencies averaged 1.10 in a 0.04 kg mouse, 1.14 in a 0.13 kg rat, 1.23 in a 2.6 kg rabbit, and 1.32 in an 8.5 kg beagle. Extrapolating to a 70 kg human, a relative bremsstrahlung efficiency of about 1.4 is predicted. An estimate was made of the 90Sr body content in a former dial painter based on in vivo counting and a bremsstrahlung efficiency of 1.39 predicted for a 55 kg human female by these animal data. Our value of 1.42 +/- 0.08 muCi 90Sr was in good agreement with corresponding results reported for this subject by 8 other laboratories.

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Section: Introductionmentioning

confidence: 99%

9OSr +90Y bremsstrahlung efficiency predicted for humans

Lloyd

Mays

Atherton

et al. 1976

Radiat Environ Biophys

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“…The techniques used for the measurements of whole body and the results obtained were compared at seven laboratories (WENGER et al, 1968). This interlaboratory comparison was positive and concluded that the maximum permissible body burden of gOSr (2 ,uCi) can be evaluated by whole-body counting with an accuracy of about 20% and for the 2Z6Ra (0.1 pCi) series (in our case 214Bi) with an accuracy of lO-15%.…”

Section: Methodsmentioning

confidence: 87%

“…The 90Sr (with its daughter various whole-body-counters measurements could serve as an extension of the European interlaboratory comparison (WENGER et al, 1968) …”

Section: Methodsmentioning

confidence: 99%

Retention and Excretion Curves of Persons Containing 90Sr and 226Ra After a Chronic Contamination

Wenger¹,

Soucas²

1975

Health Physics

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“…An estimate of the body's content of 226Ra is thus made by summing the nonemanating part (214Bi, or RaC, content), assayed by y-ray spectrometry, and the emanating part, determined from the rate of exhalation of radon. Estimates of the RaC content show good reproducibility (2,3), but much variability in determinations of the emanating content has long been recognized (3,4). We have propagated with other known errors a standard error of ±13 percent of our estimates of the exhalation rate of radon to allow for this variability.…”

mentioning

confidence: 99%

“…Recent advances in our understanding of muscle contraction rest largely on experiments in which step functions of length or tension are applied to an active muscle (1,2) and the mechanical response is measured with a time resolution in the order of 1 msec. These macroscopic measurements involve a whole muscle fiber or at least a substantial part of its length.…”

mentioning

confidence: 99%