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Absorptiometry Bone Mineral Density - Crossref

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Last Updated: 17 November 2022

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Beyond bone mineral density: new developments in dual X-ray absorptiometry assessment of bone quality

Bone quantity and, in part, bone quality are obtained by the gold standard method of dual X-ray absorptiometry, in part, bone thickness, are determined by bone density, while bone strength data is obtained by means of a new DXA scale called the bone strain index. The BSI provides local information on bone density, bone morphology, and, unlike variables such as bone mineral density and bone quality such as the trabecular bone score, it represents the status of the bone in a particular loading condition.

Source link: https://doi.org/10.57582/ijbf.210103.120


Reference Ranges for Bone Mineral Content and Density by Dual Energy X-Ray Absorptiometry for Young Children

Background information on bone mineral content and isal bone mineral density in young children has been hampered by inadequate reference values for bone mineral content and areal bone mineral density by dual energy X-ray absorption X-ray absorption. BMC and aBMD are surveyed for age, sex, and population ancestry, with the aim of finding smoothed reference ranges for BMC and aBMD in young children. Z-scores were analyzed and used to determine precision of bone measurements and the effects of height-for-age Z-scores on bone Z-scores. These results were complemented with findings from the Bone Mineral Density in Childhood Study, which followed children aged 5 to 8. 9 years to produce the smoothed reference curves. Height Z-scores were positively related to bone Z-scores and accounted for 4% to 45% of the variance. Conclusions We provide evidence-based research and stature adjustments for calculating bone Z-scores in young children in order to facilitate bone health assessments.

Source link: https://doi.org/10.1210/clinem/dgac323


AB1017 RADIOFREQUENCY ECHOGRAPHIC MULTI-SPECTROMETRY (REMS) AND DUAL-ENERGY X-RAYS ABSORPTIOMETRY FOR THE EVALUATION OF BONE MINERAL DENSITY IN A PERITONEAL DIALYSIS SETTING

Objectives This study was designed to compare the results of the REMS BMD examination with dual-energy X-ray absorptiometry in a cohort of patients with end-stage renal disease undergoing peritoneal dialysis. Lumbar spine and proximal femur REMS scans were performed, as well as lumbar spine and proximal femur DXA scans, which were also done, as well as lumbar spine and proximal femur REMS scans. Both fracture risk algorithms' risk analysis results were compared to the worst BMD obtained from either technique. The DXA laterolateral T-score at the lumbar spine was not significantly different from that of REMS, however, the DXA anteroposterior T-score was significantly higher than both the anteroposterior DXA and REMS results, although the DXA anteroposterior T-score was not significantly different from both the anteroposterior T-score and REMS results were not significantly different from both the antero t XA lumbar score at t score was not significantly higher than REMS lumbar spine, XA, while the antero XA anteroposterior T-score at the anteroposterior T-score and REMS results were not significantly higher than both the anteroposterior T-score at the anteroposterior DXA and REMS t xa and REMS results were not significantly different from REMS. Figure 1 is a representation of the mean T-scores determined by DXA and REMS at the lumbar spine and the femur. [IQR] 170 [46-76] Patients with morphometric fractures 14. 7 [22-76] 51-74] Diett Median [IQR] 43 [51-72] Age Median [IQR] 91. 4 [24. 2-9. 8] — 27. 8] Body mass index 121 [IQR] 92] 62 [KR] Patients with —36-calcium Median [W] 35 [46] 26 [M]. . Comparison of the DeFRA DXA and REMS-derived outputs, as well as FRAX DXA and REMS-derived outputs raw and after correction for TBS.

Source link: https://doi.org/10.1136/annrheumdis-2022-eular.2224


Evaluation of dual energy x-ray absorptiometry for in situ measurement of bone mineral density of equine metacarpi

In horse, bone mineral density measurements can be determined with the sensitivity and precision of dual energy x-ray absorption test. u2014Dual energy x-ray absorption x-ray absorptiometry can be used to accurately and precisely determine bone density in the equine metacarpus. In vivo bone density determination of the equine metacarpus may be able by dual energy x-ray absorptiometry. Bone density or density changes from bone remodeling that occur prior to stress fractures can be analyzed by dual energy x-ray absorptiometry.

Source link: https://doi.org/10.2460/ajvr.2001.62.752


Dual-energy X-ray absorptiometry measurement of bone-mineral density in the distal aspect of the limbs in racing Greyhounds

U2014Dual-energy x-ray absorptiometry of each limb and isolated bones from ten dogs with a fracture of the central tarsal bone of the right pelvic limb was performed. BMD measurements of CTB were also obtained from limbs of dogs without a CTB fracture, according to excised bones, and BMD measurements of CTB were also performed. Results u2014 The BMD of the accessory carpal bone and calcaneus was not significantly different from those bones in the contralateral limb's BMD. Although BMD of the entire right pelvic limb and isolated bones from dogs with a CTB fracture was lower than those for the entire left pelvic limb and isolated bones, dog with a CTB fracture did not differ, dog isolated CTB limbs and isolated bone fragments were not significantly different, dog without a CTB fracture were not significantly different, as reported for isolated CTB from dogs without a CTB fracture were not significantly different, average values for isolated CTB were not significantly different from dogs with CTB de no difference between BMD of the CTB limb and isolated bones from dogs without a CTB fractured a CTB limb or fractured limb and isolated bones with noduo limb were not significantly different.

Source link: https://doi.org/10.2460/ajvr.2000.61.1214


WHOLE BODY COMPOSITION AND BONE MINERAL DENSITY MEASURED BY DUAL-ENERGY X-RAY ABSORPTIOMETRY IN YOUNG SWIMMERS

As these indices are shown to more accurately predict general body composition status than to body mass index, height-adjusted indices that measure muscle and fatness have recently gained traction in exercise and sports sciences. Using DXA and height-normalized indices of fat mass and lean mass were determined for whole-body bone mineral density in both B and whole body bone mineral density. Between the two groups, there were no differences in body mass index, age, and body weight. Swimmers had greater LM and lean mass index, lowered total body fat mass index, and visceral adipose tissue relative to controls, as well as lower visceral adipose tissue. Male swimmers had lower FM% and FMI, as well as a higher LM than female swimmers. Compared to inactive college students with similar age, swimmers had higher lean and lower fat mass and VAT.

Source link: https://doi.org/10.33689/spormetre.1012472


Reduction in Aortic Pulse Wave Velocity Is Associated with a Short-Term Reduction in Dual-Energy X-Ray Absorptiometry Lumbar Spine Bone Mineral Density T Score

Although median T scores for those with an increase in aPWV were optimistic, median T scores remained positive for those with an increase in aPWV, but negative T scores were not reported on both scans for those with a decrease in or stable aPWV. Conclusions: Our review supports the belief that there is a correlation between bone disease and vascular disease in dialysis patients. Lumbar spine DXA includes image of the aorta and will include aortic calcification, as well as a decline in lumbar spine T score without a change in femoral spine T score, which suggests a decline in aortic calcification. Although our study needs more confirmation, our results suggest that changes in aPWV could be used as a proxy for changes in vascular calcification in the investigation of measures designed to minimize vascular calcification.

Source link: https://doi.org/10.1159/000501392


Effect of tamoxifen on bone mineral density measured by dual-energy x-ray absorptiometry in healthy premenopausal and postmenopausal women.

METHODS We measured bone mineral density in the lumbar spine and hip during our placebo-controlled breast cancer trial using dual-energy x-ray absorptiometry in premenopausal and postmenopausal healthy women. The mean annual loss in lumbar BMD measured per year over the three-year study period was 1. 4 percent compared to a small rise of 0. 2 percent per annum for women on placebo. BMD rise for women on tamoxifen was 1. 8 percent in the spine and 1. 7 percent in the hip, compared to a non-significant decrease for women on placebo. CONCLUSION These results show that tamoxifen therapy is associated with a significant decline in BMD in premenopausal women, as well as preventing bone loss in postmenopausal women.

Source link: https://doi.org/10.1200/jco.1996.14.1.78


Validation of single photon absorptiometry for on-farm measurement of density and mineral content of tail bone in cattle

The tails of the steers were removed, and the BMD of the Cy9 bone was determined in the laboratory with SPA on the resected tails and then with standard laboratory tests on defleshed bone. A measure of tail bone thickness was calculated as a percentage of total tail thickness, and calculated by SPA. BMD by SPA was determined by comparing the bone cores measured in the laboratory's ash density. The accuracy of SPA to determine BMD of tail bone will be enhanced by reducing error associated with in-vivo estimation of tail bone thickness, as well as accounting for displacement of soft tissue by bone mineral migration. In conclusion, a purpose-built SPA device could be used to perform on-farm non-invasive in vivo measurements of tailbone in cattle with accuracy that has been used in many animal studies.

Source link: https://doi.org/10.1071/an15068


Correlation between wrist bone mineral density measured by dual-energy X-ray absorptiometry and Hounsfield Units value measured by CT in lumbar spine

Our goal was to determine bone mineral density in patients with degenerative diseases using DXA-measured wrist bone mineral density to determine bone conduction of lumbar spine. The average was calculated on three axial photographs of each patient's wrist to determine bone mineral content and T- scores, as well as T- scores; lumbar CT was used to determine the CT HU values in three axial photographs of the L1-L4 vertebral bodies. The CT HU values in L1-L4 were used to determine the CT HU thresholds between osteoporosis and non-osteoporosis groups, according to a published vertebral body. The thresholds of L1-L4 between the osteoporosis group and the non-osteoporosis group were 110. 0HU, 112. 5HU, 92. 4HU, and 98. 7HU compared to the non-osteorosis group, respectively. Conclusions Wrist BMD is a simple way to measure lumbar BMD. The preoperative wrist DXA can accurately reflect the lumbar vertebral bone disease.

Source link: https://doi.org/10.21203/rs.3.rs-1540685/v1

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions