A new antenna, integrated with the shielding structure of the de ice, is described. Despite its compact dimensions, it has excellent radiation properties. 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 27: 155 157, 2000.

OBJECTIVE Several studies have been published regarding the use of bismuth shielding to protect the breast in computed tomography (CT) scans and, up to the writing of this article, only one publication about barium shielding was found. The present study was aimed at characterizing, for the first time, a lead breast shielding. MATERIALS AND METHODS The percentage dose reduction and the influen...

This work aims to determine whether lead shielding can be used to decrease the radiation dose to the fetus during CT scans for the diagnosis of pulmonary embolism during early stage pregnancy. An anthropomorphic phantom was modified to contain a 15 cc ionization chamber at the site of the uterus to enable fetal dose to be measured. The effects of a range of scan parameters, positioning of lead ...

Space exploration is entering a new era, with the advent of widespread use of new micro space probes. However, the increased use of miniaturized equipment corresponds to a decreased availability to carry radiation shielding against the space radiation environment. It is well documented that silicon micron and sub-micron electronics based on diffusive transport through a channel are degraded or ...

Radiation exposure to the surgeon and patient was measured in 14 patients during internal fixation of trochanteric fractures of the femur. Dosimetry studies were also done to determine the directions of maximum scatter production. The results indicated that the standard lead apron suffices for adequate gonadal and bone marrow shielding but the surgeon is still exposed to significant radiation l...

The Personnel Protection System (PPS) at the Stanford Synchrotron Radiation Laboratory is summarized and reviewed from the radiation safety point of view. The PPS, which is designed to protect people from radiation exposure to beam operation, consists of the Access Control System (ACS) and the Beam Containment System (BCS). The ACS prevents people from being exposed to the very high radiation l...

The world is changing, and consequently so are policies on the use of natural resources. One most convenient ways to reduce consumption aggregates in production more sustainable construction materials recovered industrial by-products. In this study, concretes designed using siderurgical from electric arc furnaces, taking advantage their high density them as radiation shielding concrete. To veri...