Structural Shielding Design for Medical X-ray Imaging Facilities |
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Autres éditions - Tout afficher
NCRP Report, Numéro 147 National Council on Radiation Protection and Measurements Aucun aperçu disponible - 2004 |
Expressions et termes fréquents
absorbed dose air-kerma rate Annual Meeting held assumed attenuation barrier thickness barrier transmission calculated cassette computed tomography concrete conservatively safe cross-table Dosimetry effective dose Equation fluoroscopic gypsum wallboard Health Phys held on April including Taylor Lecture Ionizing Radiation kerma per patient leakage radiation mammography medical imaging medical x-ray imaging mGy patient mGy week mGy week–1 milligray NCRP Reports number of patients occupancy factor occupied area operating potential patient–1 patients examined patients per week patients week phantom preshielding primary air kerma primary barrier primary beam primary radiation procedures qualified expert Rad Room floor Radiation Protection radiographic room radiographic tube Radiology Radionuclides required shielding scan scanner scattered radiation secondary air kerma secondary barrier secondary radiation Section shielding design goal shielding requirements Simpkin thickness requirements tion typical uncontrolled areas unit unshielded secondary air wall week1 workload distribution workload per patient x rays x-ray beam x-ray room x-ray tube xpre
Fréquemment cités
Page 152 - Commission recommends a system of dose limitation, the main features of which are as follows: (a) no practice shall be adopted unless its introduction produces a positive net benefit; (b) all exposures shall be kept as low as reasonably achievable, economic and social factors being taken into account...
Page 154 - AEK is the sum of the initial kinetic energies of all the charged particles liberated by indirectly ionizing particles in a volume element of the specified material...
Page 169 - The Council's activities are made possible by the voluntary contribution of the time and effort of its members and participants and the generous support of the following organizations: Alfred P. Sloan Foundation...
Page 152 - Controlled area. A defined area in which the occupational exposure of personnel to radiation or to radioactive material is under the supervision of an individual in charge of radiation protection.
Page 154 - Occupancy factor. The factor by which the workload should be multiplied to correct for the degree or type of occupancy of the area in question. RBE dose.
Page 153 - Exposure -- A measure of the ionization produced in air by x or gamma radiation. It is the sum of the electrical charges on all ions of one sign produced in air when all electrons liberated by photons in a volume element of air are completely stopped in air, divided by the mass of the air in the volume element. The special unit of exposure is the roentgen.
Page 169 - Federal Communications Commission Federal Emergency Management Agency Genetics Society of America Health Physics Society Institute of Electrical and Electronics Engineers, Inc. Institute of Nuclear Power Operations International Brotherhood of Electrical Workers National Aeronautics and Space Administration National Association of Environmental Professionals National Electrical Manufacturers Association National Institute...
Page iv - The Council wishes to express its appreciation to the Committee members for the time and effort devoted to the preparation of this Report.

