464. CT study of bone mineral measurement error

Reproducibility of bone mineral density measurement in daily practice.

BACKGROUND Bone mineral density (BMD) measurements are frequently performed repeatedly for each patient. Subsequent BMD measurements allow reproducibility to be assessed. OBJECTIVE To examine the reproducibility of BMD by dual energy x ray absorptiometry (DXA) and to investigate the practical value of different measures of reproducibility in a group of postmenopausal women. METHODS Ninety f...

Frequently asked questions on measurement of bone mineral densitometry.

Measurement of Bone Mineral in Vivo: an Improved Method.

The mineral content of bone can be determined by measuring the absorption by bone of a monochromatic, low-energy photon beam which originates in a radioactive source (iodine-125 at 27.3 kev or americium 241 at 59.6 kev). The intensity of the beam transmitted by the bone is measured by counting with a scintillation detector. Since the photon source and detector are well collimated, errors result...

Measurement of Bone Mineral Density in Children With Cancer

To the Editor: The article by Aldhafiri et al1 raises several clinically relevant issues. As addressed in the principle objective given in the study, measurement of bone mineral density in children by dualenergy x-ray absorptiometry (DXA) requires adjustment for height and weight, therefore providing validation of our observations reported in 2009.2 Secondly, it is important to establish local ...

Vertebral body bone mineral density in patients with lumbar spondylolysis: a quantitative CT study.

PURPOSE Spondylolysis is known to be a part of a disease process, which describes a defect in the pars interarticularis of vertebra. We aimed to use quantitative computed tomography (QCT) to measure vertebral body bone mineral density (BMD) in patients with lumbar spondylolysis and compare it with readings in controls. METHODS Forty symptomatic patients with lumbar spondylolysis aged 18-52 ye...