Photon Absorptiometry
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Avaliação da composição corporal em pacientes com a forma clássica da hiperplasia adrenal congênital por deficiência da enzima 21-hidroxilase / Assessment of body composition in patients with classic congenital adrenal hyperplasia due to 21-hydroxylase deficiency
Objetivos: a) Validar equações com base nas espessuras de dobras cutâneas (EDC) para estimar o percentual de massa gorda (%MG) e na impedância bioelétrica (BIA) para a massa isenta de gordura (MIG) em pacientes com hiperplasia adrenal congênita por deficiência da enzima 21-hidroxilase (HAC-D21OH); b) desenvolver equações específicas para estes paci
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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2. Diretrizes para prevenção e tratamento da osteoporose induzida por glicocorticoide
Os glicocorticoides (GC) são prescritos por praticamente todas as especialidades médicas, e cerca de 0,5% da população geral do Reino Unido utiliza esses medicamentos. Com o aumento da sobrevida dos pacientes com doenças reumatológicas, a morbidade secundária ao uso dessa medicação representa um aspecto importante que deve ser considerado no manejo
Revista Brasileira de Reumatologia. Publicado em: 2012-08
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3. AlteraÃÃes da mineralizaÃÃo Ãssea na doenÃa celÃaca
Objetivo: A dissertaÃÃo do mestrado foi dividida em duas partes: o capÃtulo de revisÃo teve como objetivo revisar como ocorre a mineralizaÃÃo Ãssea normal e na doenÃa celÃaca, e o artigo original teve como objetivo determinar a freqÃÃncia de osteoporose/osteopenia em um grupo de crianÃas e adolescentes com doenÃa celÃaca em tratamento e avaliar
Publicado em: 2007
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4. Assessment of bony tissue by ultrasound for osteoporosis diagnosis. / Caracterização de tecido ósseo por ultra-som para o diagnóstico de osteoporose.
Ultrasonic assessment of bone for managing osteoporosis has been investigated as an alternative to radition-based bone densitometry technology. In contrast with the ionizing electromagnetic radiation of such clinical bone densitometric technique, ultrasound is a mechanical wave and thus interacts with bone in a fundamentally distinct manner. Ultrasound is vi
Publicado em: 1996
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5. Long term effect of oestrogen replacement therapy on bone mass as measured by dual photon absorptiometry.
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6. Skeletal Muscle Mass in Acromegaly Assessed by Magnetic Resonance Imaging and Dual-Photon X-Ray Absorptiometry
Context: GH and IGF-I are nitrogen retaining and anabolic, but the impact of long-term exposure to supraphysiological GH and IGF-I, either from endogenous overproduction in acromegaly or exogenous sources, on skeletal muscle (SM) mass is not clear.
The Endocrine Society.
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7. Differential effects of endocrine dysfunction on the axial and the appendicular skeleton.
In 100 patients with various types of endocrine dysfunction, we measured bone mineral density (BMD) at the midradius (greater than 95% cortical bone) and distal radius (75% cortical and 25% trabecular bone) by single photon absorptiometry and at the lumbar spine (greater than 66% trabecular bone) using the new technique of dual photon absorptiometry. BMD in
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8. Differential changes in bone mineral density of the appendicular and axial skeleton with aging: relationship to spinal osteoporosis.
Patterns of bone loss in the axial and the appendicular skeleton were studied in 185 normal volunteers (105 women and 82 men; age range, 20--89 yr) and in 76 women and 9 men with vertebral fractures due to osteoporosis. Bone mineral density was measured in vivo at the lumbar spine (predominantly trabecular bone) by dual photon absorptiometry and at the midra
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9. Irreversible bone loss in osteomalacia. Comparison of radial photon absorptiometry with iliac bone histomorphometry during treatment.
We examined the relationships between the changes in bone mineral deficit in the radius, determined by single-energy photon absorptiometry at standard proximal and distal sites, and in the ilium, determined by bone histomorphometry, during the treatment of osteomalacia of diverse etiology in 28 patients. In the ilium, relative osteoid volume decreased by 75-
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10. Bone turnover in early rheumatoid arthritis. 2. Longitudinal bone density studies.
Serial measurements of bone mineral in 17 ambulant female patients with rheumatoid arthritis (RA) of recent onset and 19 age matched female controls were made in the radius by computed tomography and in the vertebrae by dual photon absorptiometry. Loss of trabecular bone from the distal radius was more rapid in RA (p = 0.0014), but there was no difference in
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11. Timing of peak bone mass in Caucasian females and its implication for the prevention of osteoporosis. Inference from a cross-sectional model.
To determine the timing of peak bone mass and density, we conducted a cross-sectional study of bone mass measurements in 265 premenopausal Caucasian females, aged 8-50 yr. Bone mass and bone mineral density were measured using dual X-ray absorptiometry and single-photon absorptiometry at the spine (anteroposterior, lateral), proximal femur, radius shaft, dis
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12. Genetic determinants of bone mass in adults. A twin study.
The relative importance of genetic factors in determining bone mass in different parts of the skeleton is poorly understood. Lumbar spine and proximal femur bone mineral density and forearm bone mineral content were measured by photon absorptiometry in 38 monozygotic and 27 dizygotic twin pairs. Bone mineral density was significantly more highly correlated i