- [Anthropometric, densitometric and histometric investigations into the development of the femoral bone in human foetuses]. [Journal Article]
- AAAnn Acad Med Stetin 2013; 59(1):91-9
- The purpose of this study was the estimation of foetal femoral bone development, based on anthropometric, densitometric and histometric examination.
The purpose of this study was the estimation of foetal femoral bone development, based on anthropometric, densitometric and histometric examination.
- Prevalence of vertebral fracture in oldest old nursing home residents. [Multicenter Study]
- OIOsteoporos Int 2012; 23(11):2601-6
- CONCLUSIONS: In oldest old nursing home residents, osteoporosis and vertebral fracture were frequently detected. Ten-year fracture probability appeared to be mainly determined by age and clinical risk factors obtained by medical history, rather than by BMD or vertebral fracture.
- The relationship between panoramic radiomorphometric indices of the mandible and calcaneus bone mineral density. [Journal Article]
- MMedicina (Kaunas) 2010; 46(2):95-103
- CONCLUSIONS: Bone mineral density in the calcaneus and the mandible measured using dual energy x-ray and laser osteodensitometer DXL Calscan and by applying panoramic radiography reflect general changes in the mineralization of these bones, characteristic of the postmenopausal period.
- [Osteoporosis: modern approaches and new possibilities in the prevention and treatment]. [Review]
- KMKlin Med (Mosk) 2006; 84(9):4-7
- Contemporary evidence-based approaches to the diagnostics, treatment, and prophylaxis of system osteoporosis (OP) are presented in the article. The main principles of therapeutic and preventive measu…
Contemporary evidence-based approaches to the diagnostics, treatment, and prophylaxis of system osteoporosis (OP) are presented in the article. The main principles of therapeutic and preventive measures in OP are formulated. Bone tissue mineral density was studied with dual-energy x-ray absorptiometry using a QDR-4500A HOLOGIC osteodensitometer; the results and the authors' own experience in the application of pharmaceuticals was analyzed.
- Peak bone mineral area density and determinants among females aged 9 to 24 years in Mexico. [Journal Article]
- OIOsteoporos Int 2003; 14(7):539-47
- CONCLUSIONS: For Mexican females in the state of Morelos, the BMD are similar to that reported in a number of ethnic groups. In mestizo females the timing of PBM is highly site specific with some skeletal regions acquiring PBM earlier: specifically, in the femoral region where PBM rapidly reached a plateau. In Mexico, early strategies for preventing osteoporosis should be focused on promoting physical activity and appropriate eating habits (control of obesity, among others) during the puberty stage.
- [Osteometric features of duodenal ulcer disease in children depending on the clinical course of the illness]. [Journal Article]
- EKEksp Klin Gastroenterol 2003; (1):39-41, 182
- In order to study the state of the bone tissue in children with duodenal ulcer, we conducted research of peripheral parts of the radius and ulna at the computer osteodensitometer DTX-100 (Denmark) wi…
In order to study the state of the bone tissue in children with duodenal ulcer, we conducted research of peripheral parts of the radius and ulna at the computer osteodensitometer DTX-100 (Denmark) with the help of the quality X-ray absorptiometry method. Osteopenias of various degrees of severity were revealed in 47.22% of patients under study. The critical age periods for osteopenia formation in children with duodenal ulcers is the age of 12-15 in girls and 13-16 in boys. We revealed a clear dependence of the mineral content and mineral density of the bone tissue on particular characteristics of the duodenal ulcer clinical course.
- Comparison of two Hologic DXA systems (QDR 1000 and QDR 4500/A) for in vivo bone mass measurement in the baboon (Papio ursinus). [Journal Article]
- JCJ Clin Densitom 2002; 5(3):313-8
- Dual-energy X-ray absorptiometry (DXA) is the gold standard for bone mass measurement in humans. New generation osteodensitometers have been introduced and numerous studies have been performed to com…
Dual-energy X-ray absorptiometry (DXA) is the gold standard for bone mass measurement in humans. New generation osteodensitometers have been introduced and numerous studies have been performed to compare new and old devices for in vivo measurements of bone mineral density (BMD). However similar studies in nonhuman primates have yet to be performed. In this longitudinal study, two generation of osteodensitometers from the same manufacturer (Hologic QDR 1000 and Hologic QDR 4500/A) were used to detect bone changes in a cohort of 24 ovariectomized (OVX) Chacma baboons (Papio ursinus) during a period of 36 mo. Correlation between the same osteodensitometers were also obtained for the lumbar spine (L1-L4) area, BMD, and bone mineral content (BMC) in a cohort of 33 adult female baboons and for the total hip area, BMD, and BMC in a group of 25 adult female baboons. The QDR 1000 to QDR 4500/A area, BMC, and BMD correlation coefficient (r(2)) were 0.848, 0.939, and 0.916, respectively; r(2) for total hip BMD was 0.818. Percentage of variation (PV) among the total vertebral (L1-L4) area measured by the two osteodensitometers was 5.3 +/- 2.3 (mean +/- SD). BMC had the lowest PV and the highest r(2). The mean lumbar BMD was higher when measured by QDR 1000 with a PV% of 7.7 +/- 3.1 (mean +/- SD). The mean hip BMD was higher measured by QDR 1000 with a PV% of 9.3 +/- 7.1 (mean +/- SD). Slopes of two regression lines for the lumbar spine (L1-L4) and total hip BMD were 0.928 and 0.914, respectively. Longitudinal analysis of lumbar BMD in OVX baboons showed that QDR 4500/A detected a significant bone density increase at 36 and 48 mo post- OVX, compared to time 12, whereas the QDR 1000 did not. Our results indicate that both osteodensitometers can be used to measure bone changes in longitudinal studies in primates, but that before upgrading to a newgeneration osteodensitometer, a calibration curve has to be obtained so that both devices can be equally used in regular experimental study in nonhuman primates.
- Effects of long-term use of high-dose inhaled steroids on bone density and calcium metabolism. [Clinical Trial]
- JAJ Allergy Clin Immunol 1994; 94(5):796-803
- CONCLUSIONS: This study shows that although the serum osteocalcin level was lower and the urinary phosphorus level was higher in subjects using high-dose inhaled steroids for a mean of 34 months, compared with a control group, no significant difference in bone density or other markers of bone metabolism was found between the two groups.
- Switching from DXA pencil-beam to fan-beam. I: Studies in vitro at four centers. [Multicenter Study]
- BONEBone 1994 Nov-Dec; 15(6):667-70
- The performance of the Hologic QDR-2000 DXA osteodensitometer was critically evaluated at four centers, using at all four centers one bone equivalent humanoid spine phantom supplied by the manufactur…
The performance of the Hologic QDR-2000 DXA osteodensitometer was critically evaluated at four centers, using at all four centers one bone equivalent humanoid spine phantom supplied by the manufacturer. Results were compared with results from Hologic QDR-1000/W using that phantom tested at the same centers. It appears that the concept of fan-beam scanning--as used in the QDR-2000: a fan-beam, a linear array detector above the phantom, and an x-ray tube located rather close to the spine below the phantom--creates problems due to the magnification effect of the fan beam. The effect of decreasing the distance between the "vertebrae" of the phantom and the couch are: bone mineral content (BMC) increases by 2.8% per cm, projected area (Area) by 2.8% per cm, and bone mineral density (BMD) is unchanged. When QDR-1000/W is upgraded to QDR-2000, BMD is relatively constant, but there are shifts of BMC and Area which are partly due to the magnification effect of the fan-beam. Replacement of a QDR-1000/W with a QDR-2000 can invalidate longitudinal measurements, even for BMD, unless the proportionality factors of the QDR-2000 are checked and, if necessary, changed. This is true for switching from QDR-1000/W to pencil-beam mode of QDR-2000 or to fan-beam mode of QDR-2000. Even with pencil-beam mode, the long-term precision error with phantoms is higher for QDR-2000 than for QDR-1000/W (for BMD, 0.47% versus 0.35%).
- Measurement of bone mineral content (BMC) of the lumbar spine, II. correlation between forearm BMC and lumbar spine BMC. [Journal Article]
- SJScand J Clin Lab Invest 1980; 40(7):665-70
- A comparison between forearm bone mineral content (BMC) and lumbar BMC was made in post-menopausal women. Women without symptoms, women with clinical spinal osteoporosis, and women with prednisone-tr…
A comparison between forearm bone mineral content (BMC) and lumbar BMC was made in post-menopausal women. Women without symptoms, women with clinical spinal osteoporosis, and women with prednisone-treated rheumatoid arthritis were studied. A conventional two-dimensional single-photon osteodensitometer was used for measurement of forearm BMC. A new two-dimensional dual-photon osteodensitometer was used for measurement of lumbar BMC. Its radioactive source was 153Gadolinium. The mean lumbar BMC was significantly reduced in women with clinical spinal osteoporosis (P < 0.001). The mean forearm of BMC of those patients was normal. Thus, forearm BMC was a poor indicator of spinal osteopenia. If forearm BMC was used to predict lumbar BMC erroneously high results were obtained in women with clinical spinal osteoporosis, and erroneously low values were obtained in prednisone-treated women with rheumatoid arthritis.