Energy-selective filtration of dental x-ray beams

Journal Article · Sun Nov 01 04:00:00 EST 1981 · Oral Surg., Oral Med., Oral Pathol.; (United States)

DOI:https://doi.org/10.1016/0030-4220(81)90370-4· OSTI ID:5392029

Gelskey, D E; Baker, C G

Samarium is known for its ability to filter simultaneously low- and high-energy x-ray photons from an x-ray beam that are not useful in producing a diagnostic radiograph. This study was undertaken to determine the optimum thickness of samarium required to minimize patient exposure and exposure time. The results indicate that use of a filter thickness of 0.16 mm. minimized patient radiation exposure and permitted the use of an exposure time sufficiently short to minimize motion unsharpness. The incorporation of a 0.16 mm. samarium filter in the x-ray beam reduced exposure by about 40 percent as compared to a 2.5 mm. aluminum filter; the exposure time must be increased approximately twice to obtain optical densities equivalent to those produced with aluminum filtration.

• Research Organization: Department of Stomatology, Faculty of Dentistry, University of Manitoba, Winnipeg, Manitoba, Canada
• OSTI ID: 5392029
• Journal Information: Oral Surg., Oral Med., Oral Pathol.; (United States), Journal Name: Oral Surg., Oral Med., Oral Pathol.; (United States) Vol. 52:5; ISSN OSOMA
• Country of Publication: United States
• Language: English

Related Subjects

440100 -- Radiation Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
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
DENTISTRY
DESIGN
DIAGNOSTIC TECHNIQUES
DIGESTIVE SYSTEM
DOSES
ELEMENTS
EQUIPMENT
FILTERS
IMAGES
MEDICINE
METALS
NUCLEAR MEDICINE
OPTIMIZATION
ORAL CAVITY
PATIENTS
RADIATION DOSES
RADIATION PROTECTION
RADIOLOGY
RARE EARTHS
SAMARIUM
TEETH
X-RAY EQUIPMENT