The accuracy of volumetric bone density measurements in dual X-ray absorptiometry

1995 ◽  
Vol 56 (3) ◽  
pp. 210-214 ◽  
Author(s):  
M. A. Sabin ◽  
G. M. Blake ◽  
S. M. MacLaughlin-Black ◽  
I. Fogelman
Keyword(s):  
Bone Density ◽  
Density Measurements ◽  
X Ray ◽  
Volumetric Bone Density

Dual energy x-ray absorptiometry: The effects of beam hardening on bone density measurements

1992 ◽  
Vol 19 (2) ◽  
pp. 459-465 ◽  
Author(s):  
Glen M. Blake ◽  
Diane B. McKeeney ◽  
Sanjiv C. Chhaya ◽  
Paul J. Ryan ◽  
Ignac Fogelman
Keyword(s):  
Bone Density ◽  
Dual Energy ◽  
Beam Hardening ◽  
Density Measurements ◽  
X Ray

scholarly journals Densitometric comparison of 3 occipital regions for suitability of fixation

2016 ◽  
Vol 24 (4) ◽  
pp. 565-569
Author(s):  
Chandan Das ◽  
Anna G. U. S. Newcomb ◽  
Daniel P. Gaudin ◽  
Neil R. Crawford
Keyword(s):  
Bone Density ◽  
Upper Cervical Spine ◽  
Mineral Density ◽  
Cervical Spine Instability ◽  
X Ray ◽  
Occipitocervical Fixation ◽  
Upper Cervical ◽  
Potential Alternative ◽  
Volumetric Bone Density ◽  
Cervical Rotation

OBJECTIVE Atlantooccipital fixation is an important technique in the treatment of upper cervical spine instability. Important considerations for implant devices are obtrusiveness and propagation of torque through the device caused by cervical rotation. The authors evaluated the feasibility of 3 regions of the occiput as sites for occipitocervical fixation by examining bone mineral density at these locations. METHODS Unembalmed occiputs of 9 male and 4 female cadavers were used (mean age at time of death was 61.6 years, range 36–68 years). Studies were undertaken using caliper measurements and dual-energy x-ray absorptiometry of the superior nuchal line (SNL), the external occipital protuberance (EOP), and the inferior nuchal line (INL). RESULTS Data indicate that the bone at the INL has a similar volumetric bone density as the bone at the SNL, despite having half the thickness. Also, the volumetric bone density increases laterally along the nuchal lines. CONCLUSIONS Most hardware fixation is centered on stabilization at the EOP and the SNL. On the basis of these radiological results, the INL shows promise as a potential alternative site for screw placement in occipitocervical fixation.

Estimates of volumetric bone density from projectional measurements improve the discriminatory capability of dual X-ray absorptiometry

2009 ◽  
Vol 10 (7) ◽  
pp. 1101-1110 ◽  
Author(s):  
Michael Jergas ◽  
Martin Breitenseher ◽  
CLAUS-C. Glüer ◽  
Wei Yu ◽  
Harry K. Genant
Keyword(s):  
Bone Density ◽  
X Ray ◽  
Volumetric Bone Density

scholarly journals Measurement and Interpretation of Dual-Energy X-ray Absorptiometry Bone Density Measurements

2019 ◽  
Vol 94 (3) ◽  
pp. 268-272
Author(s):  
Eun Heui Kim ◽  
In Joo Kim ◽  
Yun Kyung Jeon
Keyword(s):  
Bone Density ◽  
Dual Energy ◽  
Density Measurements ◽  
X Ray

Bone Density Measurements in vivo: Improvement of X-ray Densitometry

Science ◽  
1965 ◽  
Vol 150 (3693) ◽  
pp. 221-222 ◽  
Author(s):  
R. L. Mason ◽  
C. Ruthven
Keyword(s):  
Bone Density ◽  
Density Measurements ◽  
X Ray

OSTEOPOROSIS AND RISK FACTORS IN THE PATIENTS ON CHRONIC HEMODIALYSIS

2015 ◽  
pp. 50-58
Author(s):  
Thi Dung Nguyen ◽  
Tam Vo
Keyword(s):  
Quality Of Life ◽  
Risk Factors ◽  
Bone Density ◽  
Region Of Interest ◽  
Cross Sectional Study ◽  
Chronic Hemodialysis ◽  
Cross Sectional ◽  
X Ray ◽  
Density Reduction

Background: The patients on hemodialysis have a significantly decreased quality of life. One of many problems which reduce the quality of life and increase the mortality in these patients is osteoporosis and osteoporosis associated fractures. Objectives: To assess the bone density of those on hemodialysis by dual energy X ray absorptiometry and to examine the risk factors of bone density reduction in these patients. Patients and Method: This is a cross-sectional study, including 93 patients on chronic hemodialysis at the department of Hemodialysis at Cho Ray Hospital. Results: Mean bone densities at the region of interest (ROI) neck, trochanter, Ward triangle, intertrochanter and total neck are 0.603 ± 0.105; 0.583 ± 0.121; 0.811 ± 0.166; 0.489 ± 0.146; 0.723 ± 0.138 g/cm2 respectively. The prevalences of osteoporosis at those ROI are 39.8%, 15.1%; 28%; 38.7%; and 26.9% respectively. The prevalences of osteopenia at those ROI are 54.8%; 46.3%; 60.2%; 45.2% and 62.7% respectively. The prevalence of osteopososis in at least one ROI is 52.7% and the prevalence of osteopenia in at least one ROI is 47.3%. There are relations between the bone density at the neck and the gender of the patient and the albuminemia. Bone density at the trochanter is influenced by gender, albuminemia, calcemia and phosphoremia. Bone density at the intertrochanter is affected by the gender. Bone density at the Ward triangle is influenced by age and albuminemia. Total neck bone density is influenced by gender, albuminemia and phosphoremia. Conclusion: Osteoporosis in patients on chronic hemodialysis is an issue that requires our attention. There are many interventionable risk factors of bone density decrease in these patients. Key words: Osteoporosis, DEXA, chronic renal failure, chronic hemodialysis

scholarly journals Bone Mineral Density Measurements: Are they Worth While?

1996 ◽  
Vol 89 (8) ◽  
pp. 457-461 ◽  
Author(s):  
D J Torgerson ◽  
C Donaldson ◽  
D M Reid
Keyword(s):  
Bone Mineral Density ◽  
Bone Density ◽  
Bone Mineral ◽  
Diagnostic Tool ◽  
Screening Tool ◽  
Density Measurement ◽  
Bone Density Measurement ◽  
Mineral Density ◽  
Density Measurements ◽  
Bone Mineral Measurements

Bone mineral density measurements have been criticized on the grounds that they are not a worth-while screening tool. In this paper we argue that bone mineral measurements can be an efficient diagnostic tool even if they are not of proven value for screening. There is complex relationship between the costs of a measurement, the intervention and the predictive value of the test all of which must be accounted for when assessing the value of a bone density measurement. For bone density measurements to be used for screening, a wider evaluation needs to be undertaken compared with that for their use as a diagnostic tool. We address some common objections, for example, that low compliance with screening would undermine efficiency, and show that these are not relevant. Evaluations of screening need to address issues that are likely to affect efficiency.

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