Results 251 to 260 of about 94,612 (306)

Absorptiometry and ?osteoporosis?: problems

Journal of Bone and Mineral Metabolism, 2003
"Connecting the dots" between diverse clinical and other matters and an updated bone physiology reveals relationships that could modify some ideas about the roles and uses of absorptiometry in "osteoporosis" work. Herein, absorptiometry means that part of "clinical densitometry" that depends on X-ray absorption by bone and other tissues, thus excluding
openaire   +2 more sources

Radiogrammetry and Radiographic Absorptiometry

Radiologic Clinics of North America, 2010
Metacarpal morphometry and radiogrammetry are the oldest methods for quantitative assessment of the skeleton. The historical aspects of these measurements are reviewed. Although they were inexpensive and widely available and provided useful research and epidemiologic information, they were labor intensive and imprecise.
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Dual-energy X-ray absorptiometry versus single photon absorptiometry of the radius

Calcified Tissue International, 1991
Radial diaphyseal bone mineral density (BMD) was measured at the standard one-third site by dual-energy X-ray absorptiometry (DEXA) and by 125I single photon absorptiometry (SPA) in 70 consecutive subjects, aged 12-86 years, with metabolic disorders of the skeleton. Each patient was measured once by the DEXA (Hologic QDR-1000) instrument and four times
R S, Weinstein, K D, New, L J, Sappington   +2 more
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An evaluation of dual-energy X-ray absorptiometry and comparison with dual-photon absorptiometry

Osteoporosis International, 1992
Dual-photon absorptiometry (DPA) is a well-established procedure for measuring bone mineral density (BMD). Recently, dual-energy X-ray absorptiometry (DXA) has become available, which has the ability to measure BMD both regionally and in the total body (TB). We have evaluated the in vivo and in vitro precision of a DXA instrument and compared it with a
B, Lees, J C, Stevenson
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Roentgen video-absorptiometry

Physics in Medicine & Biology, 1974
Discusses the feasibility of performing absorptiometric measurements using a televised image-intensified fluoroscopic system. The system consists of an X-ray generator, image intensifier, TV camera and A/D convertor under computer control for digitizing the video signals.
null C R Wilson, null E L Ritman, null R E Sturm   +2 more
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Radiographic Absorptiometry of the Phalanx

2001
Radiographic absorptiometry of the phalanx for the assessment of bone mass density has a long history. Since it is a relatively cheap method that is easy to perform it is very suitable for screening purposes.
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Photon absorptiometry of hydrocarbons

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 1986
Abstract Measured and parametrised values of the attenuation coefficients of several hydrocarbons having a hydrogen-to-carbon weight ratio in the range from 0.05 to 0.16 and for photon energies 33, 75, 145, 279 and 662 keV are presented. The values are compared and possible trends and applications discussed.
D.A. Bradley, C.S. Chong, A.M. Ghose
openaire   +1 more source

Body Composition by Dual-Photon Absorptiometry and Dual-Energy X-Ray Absorptiometry

1990
Dual-energy projection methods have been used over the past decade for non-invasive measurement of bone. Dual-photon absorptiometry (DPA) using a 153-Gd radionuclide source is used clinically in about 1000 centers to measure regional bone mineral density (BMD), particularly of the spine and proximal femur (Barden and Mazess, 1989).
R B, Mazess, H S, Barden, J A, Hanson
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Photon absorptiometry of bone and bone standards

The International Journal of Applied Radiation and Isotopes, 1985
Abstract Measured and parametrised values of the attenuation coefficients of bone and several bone standards are presented for the photon energies 33, 75, 145, 279 and 662 keV. The values are compared, inadequacies are highlighted and possible new formulations are discussed.
D A, Bradley, C S, Chong, A M, Ghose
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[Absorptiometry].

Der Radiologe, 2007
This article is an introduction to dual X-ray absorptiometry (DXA), the most widely used method today for diagnosis of osteoporosis. DXA can be used to assess projective bone mineral density at the lumbar spine, the proximal hip, and the whole body as well as the skeletal periphery at the forearm, the hand, and the heel.
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