The benefits of radiotherapy for inoperable biliary tract cancer remain unclear due to the lack of randomized data. We evaluated the impact of radiotherapy on survival in elderly patients using the SEER-Medicare database. Patients in the SEER-Medicare database with inoperable biliary tract tumors diagnosed between 1998 and 2011 were included. We used multivariate logistic regression to evaluate...

One of the effective techniques which has evolved in contemporary orthopaedic practice is C-arm fluoroscopy intra-operative procedures. Such improve competence surgeon while reducing jejuneness and duration patients stay at hospital. Although having awareness about reported benefits device, there increasing worry over surgical teams elevated radiation exposure. The current research was underta...

Health physics aspects associated with operation of the ITER are investigated. ITER has health physics elements in common with existing facilities as well as unique features. Fusion facility neutron radiation is similar to that encountered in a low energy accelerator. The tritium hazard has radiation protection issues in common with the Canadian Deuterium reactor. Completion of the final ITER d...

Ionizing radiation has been known to man for nearly eighty-five years and for only a few weeks less than that time it has been recognized that if people are exposed to enough ionizing radiation they may suffer injury of an obvious and definable nature. What is not known is whether there is some lower limit to the exposure below which man will not suffer injury and above which he will. There is ...

The performance of a 7Li(p,n) reaction-based Prompt Gamma Ray Neutron Activation Analysis (PGNAA) setup has been determined for analysis of Portland cement samples using Monte Carlo study. The calculations were carried out for a 7Li(p,n) reaction-based PGNAA setup with an external moderator similar to the one used in a previous 2.8 MeV neutrons-based PGNAA setup. The optimum values of geometry ...

In India, bricks as building materials are mainly prepared by clay using the deposited sediments of rivers, and the radionuclide contents in bricks and brick-making clays should vary with origin and geological condition. Primordial radionuclides in building materials are one of the sources of radiation hazard in dwellings made of these materials. It is important to measure the natural radioacti...

In the near field, the antenna pattern provided by the antenna manufacturer is generally not applicable, or should be considered with caution, even for the single antenna in free space. In the real life, antenna is often surrounded by other conductive objects in the immediate vicinity. These objects tend to distort the antenna radiation pattern. Since the electromagnetic field calculation for t...

BACKGROUND We examined survival associated with locally advanced esophageal squamous cell cancer (SCC) to evaluate if treatment without surgery could be considered adequate. STUDY DESIGN Patients in the Surveillance, Epidemiology and End Results Registry (SEER) registry with stage II-III SCC of the mid or distal esophagus from 1998-2008 were grouped by treatment with definitive radiation vers...