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| Fontes-Pereira,A.; Matusin,D.P.; Rosa,P.; Schanaider,A.; von Krüger,M.A.; Pereira,W.C.A.. |
| A simple experimental protocol applying a quantitative ultrasound (QUS) pulse-echo technique was used to measure the acoustic parameters of healthy femoral diaphyses of Wistar rats in vivo. Five quantitative parameters [apparent integrated backscatter (AIB), frequency slope of apparent backscatter (FSAB), time slope of apparent backscatter (TSAB), integrated reflection coefficient (IRC), and frequency slope of integrated reflection (FSIR)] were calculated using the echoes from cortical and trabecular bone in the femurs of 14 Wistar rats. Signal acquisition was performed three times in each rat, with the ultrasound signal acquired along the femur's central region from three positions 1 mm apart from each other. The parameters estimated for the three... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bone; Tissue characterization; Quantitative ultrasound; Clinical research protocols; Animal model. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000500403 |
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| Braga Júnior,J.W.R.; Neves,R.M.S.; Pinheiro,M.M.; Frisoli Júnior,A.; Castro,C.H.M.; Szejnfeld,V.L.; Carvalho,A.B.. |
| We evaluated the prevalence of low bone mineral density (BMD) and osteoporotic fractures in kidney transplantation (KT) patients and determined risk factors associated with osteoporotic fractures. The study was conducted on 191 patients (94 men and 97 women) with first KT for 3 years or more presenting stable and preserved renal function (serum creatinine levels lower than 2.5 mg/dl). KT patients were on immunosuppressive therapy and the cumulative doses of these drugs were also evaluated. BMD was determined by dual-energy X-ray absorptiometry at multiple sites (spine, femur and total body). Quantitative ultrasound of the calcaneus (broadband ultrasound attenuation, speed of sound, and stiffness index, SI) was also performed. Twenty-four percent (46) of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Kidney transplantation; Bone density; Quantitative ultrasound; Osteoporosis; Fracture. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000100016 |
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