Results 151 to 160 of about 333,193 (216)

Precision of dual-photon absorptiometry

Calcified Tissue International, 1988
Precision of dual-photon absorptiometry (DPA) measurements was determined in a lumbar spine phantom and in humans. Approximately half of the measurements were made before and half after a 153gadolinium source change. The phantom was measured with different amounts of acrylic, which simulates human soft tissue, in order to evaluate the influence of body
C C, Shipp, P S, Berger, M S, Deehr, B, Dawson-Hughes   +3 more
openaire   +2 more sources

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

Dual-photon absorptiometry of the proximal tibia

Archives of Orthopaedic and Traumatic Surgery, 1987
Dual-photon absorptiometric bone-mineral assay, penetration tests, and axial compression tests of the proximal tibial epiphyses were carried out in 18 human cadaver knees. The reproducibility of bone mineral assay was within +/- 12% (95% tolerance limits).
I, Hvid, C, Hasling, S L, Hansen, H H, Hansen   +3 more
openaire   +2 more sources

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
openaire   +2 more sources

Dual photon absorptiometry of the proximal tibia

Calcified Tissue International, 1989
Bone mineral content (BMC) and bone mineral density (BMD) of the proximal tibia were determined by dual photon absorptiometry on 44 women, aged 23-87 years. The area of the tibia measured was a 2.01 cm region immediately distal to the medial and lateral tuberosities.
M M, Checovich, B J, Kiratli, E L, Smith
openaire   +2 more sources

OSTEOPOROSIS IN HYPERTHYROIDISM ESTIMATED BY PHOTON ABSORPTIOMETRY

Acta Endocrinologica, 1979
ABSTRACT The degree of osteoporosis in hyperthyroidism before and during treatment with carbimazole was studied by photon absorption technique of the right forearm and calcaneus. In addition serum total calcium, serum ionized calcium, serum phosphorus and serum alkaline phosphatase were determined.
J, Linde, T, Friis
openaire   +2 more sources

Sensitivity of dual-photon absorptiometry in spinal osteoporosis

Calcified Tissue International, 1988
Lumbar spine bone mass and density were measured with Dual photon absorptiometry (DPA) in 60 patients with crush fractures and 60 age-matched normal women. Short-term reproducibility of bone mineral density (BMD) was 1.3% in normal women and 2.5% in osteoporotic women; long-term reproducibility in normal women was 2.2%.
J M, Pouilles, F, Tremollieres, J P, Louvet, B, Fournie, G, Morlock, C, Ribot   +5 more
openaire   +2 more sources

Dual Photon Absorptiometry The Importance of Clinical Correlation

Clinical Nuclear Medicine, 1988
Dual photon absorptiometry is a reliable method of assessing bone mineral density. However, distortions of bony architecture, which may not be evident from the low-resolution images provided, can complicate the evaluation and lead to misleading findings. A case is presented which describes the importance of clinical and radiographic correlation.
L K, Von Moll, B L, Shulkin
openaire   +2 more sources

A Renal Transplant Seen on Dual Photon Absorptiometry

Clinical Nuclear Medicine, 1993
A 25-year-old man who had a chronic rejection of renal transplantation performed 4 years earlier develops seccondary hyperparathyroidism. Dual-photon absorptiometry of the lumbar spine and right femur were performed to evaluate changes in bone mass. A roundish highdensity area was seen in the right iliac region.
F, Pons, P, Bassa, M, Sola, M, Huguet
openaire   +2 more sources

Value of Single Photon Absorptiometry in Osteoporosis Screening

Clinical Nuclear Medicine, 1988
Radial bone mineral content and bone mineral density were measured in 1515 women referred for osteoporosis screening. A detailed questionnaire allowed the selection of 1069 normal white women for further analysis who had no historical evidence of bone disease or predisposing factors for bone disease. The nondominant radius was measured at two locations:
G L, Bilbrey, J, Weix, G D, Kaplan
openaire   +2 more sources