Shielding requirements for mammography
Shielding requirements for mammography installations have been investigated. To apply the methodologies of NCRP Report No. 49, the scatter-to-incident ratio of a typical mammography beam was measured, and the broad beam transmission was calculated for several representative beam spectra. These calculations were found to compare favorably with published low kVp tungsten-targeted x-ray transmission through a variety of shielding materials. Radiation shielding tables were developed from the calculated transmissions through Pb, concrete, gypsum, steel, plate glass, and water, using a technique which eliminates the ''add one HVL'' rule. It is concluded that Mo-targeted x-ray beams operated at 35 kVp require half the shielding of W-targeted beams operated at 50 kVp, and that adequate, cost-effective shielding calculations will consider alternatives to Pb.
- Research Organization:
- St. Luke's Hospital, Milwaukee, WI
- OSTI ID:
- 6019173
- Journal Information:
- Health Phys.; (United States), Journal Name: Health Phys.; (United States) Vol. 53:3; ISSN HLTPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
560151* -- Radiation Effects on Animals-- Man
62 RADIOLOGY AND NUCLEAR MEDICINE
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOMEDICAL RADIOGRAPHY
BODY
DIAGNOSTIC TECHNIQUES
DOSES
ELECTROMAGNETIC RADIATION
ELEMENTS
GLANDS
GLASS
HYDROGEN COMPOUNDS
IONIZING RADIATIONS
LEAD
MAMMARY GLANDS
MEDICINE
METALS
NUCLEAR MEDICINE
ORGANS
OXYGEN COMPOUNDS
RADIATION DOSES
RADIATION PROTECTION
RADIATIONS
RADIOLOGY
SHIELDING
WATER
X RADIATION