With the advent of high-energy collimators and dual-head coincidence cameras, standard nuclear medicine facilities will soon begin imaging with PET isotopes. The use of 511-keV emitters raises new radiation safety concerns for technologists traditionally limited to handling 99mTc and other low-energy isotopes. This article is a basic review of positron emitters, measurement concerns, exposure r...

This research focuses on morbidity-mortality reviews and internal outcome focus studies. Definitions are provided as well as a complete discussion of the ideal parameters to consider when constructing each of these. The implementation of the design characteristics used may be of assistance to a center pursuing achievement of these requirements toward accreditation to exemplify continuous qualit...

STUDY OBJECTIVE To investigate whether the occupational exposure to external ionising radiation of men employed at the Sellafield nuclear installation, West Cumbria, affects the sex of the children they subsequently father. DESIGN A retrospective cohort study using logistic regression to analyse the sex ratio, in particular in relation to paternal preconceptional irradiation. SETTING AND PA...

We have considered the thermal equilibrium in pre-protostellar cores in the approximation where the dust temperature is independent of interactions with the gas and where the gas is heated both by collisions with dust grains and ionization by cosmic rays. We have then used these results to study the stability of cores in hydrostatic equilibrium in the limit where thermal pressure dominates over...

The goals of focal therapy are laudable, namely reducing morbidity of treatment while ensuring at least equivalent oncological outcomes when compared with established interventions for localised prostate cancer, e.g. RP and external beam radiotherapy. While progress has been made towards better identifying the index lesion in these patients, there is much yet to be done to establish the validit...

The 〈V/Vmax〉 of the cosmological X-ray flashes detected by Wide Field Cameras on BeppoSAX is calculted theoretically in a simple jet model. The total emission energy from the jet is assumed to be constant. We find that if the jet opening half-angle is smaller than 0.03 radian, the theoretical 〈V/Vmax〉 is less than ∼ 0.4, which is consistent with the recently reported observational value of 0.27...

Rontgen Rays in Medical Work. -By David Walsii, m.d., Edin., Physician, Western Skin Hospital, London, W., Late Hony. Secy., Rontgen Society, London, and Lewis Jones, m.d., Cantab., f.r.c.p,, Medical Officer in Charge of the Electrical Dept. of St. Bartholomew's Hospital. Third Edition, pp.316, with illustrations and five plates. Price, 12s. 6c7. nett. London: Bailliere, lindal], and Cox, Stran...

PURPOSE/OBJECTIVES To explore methods for analysis of unsolicited comments written on forced-choice surveys related to health-related quality of life (HRQOL) among men treated for prostate cancer. DATA SOURCES Unsolicited comments written on surveys administered as part of a study investigating HRQOL for men receiving surgery, external beam radiation therapy, or brachytherapy for prostate can...

BACKGROUND AND PURPOSE The impact of differences in the distribution of major cancer sites and stages at diagnosis among 4 European countries on the optimal utilization proportion (OUP) of patients who should receive external beam radiotherapy was assessed within the framework of the ESTRO-HERO project. MATERIALS AND METHODS Data from Australian Collaboration for Cancer Outcomes Research and ...