background: radiation therapy  uses high-energy radiation to kill cancer cells. photoneutron contamination and induced radioactivity of high energy therapeutic photon beams are considered as the main source of occupational exposure to radiation therapists who works with linear accelerators operating above 10 mv. materials and methods: the gamma dose rates were measured after termination of diff...

Background: Radiation therapy  uses high-energy radiation to kill cancer cells. Photoneutron contamination and induced radioactivity of high energy therapeutic photon beams are considered as the main source of occupational exposure to radiation therapists who works with linear accelerators operating above 10 MV. Materials and Methods: The gamma dose rates were measured after termination of...

OBJECTIVES Linear accelerators operating at or above 10 MV produce neutrons by photonuclear reactions and induce activation in machine components, which are a source of potential exposure for radiation therapists. This study estimated gamma dose contributions to radiation therapists during high energy, whole pelvic, photon beam treatments and determined the optimum room entry times, in terms of...

As China is the only country in the Far East world in which Jews have continually lived for over 1,000 years, "Chinese Judaism" -referring to the religious belief and practices of those Jews who had lived or are now living in China -is unique. Within this long history, a significant distinction must be made. Jews who came before modern times, before 1840, became part of Chinese society almost w...

a study of the Literature of Inoculation for Rabies and Hydrophobia. Now evidence may be collected from the student in the workshop, or from gossip in the market-place. Our author has chosen the latter source. The literature studied and quoted is that ordinarily found on the table of the reading-room of a London Club. We have quotations from The Times and The Field?these have some weight; and w...