Abstract:
:Newly developed fuzzy logic-derived structural parameters were used to characterize trabecular bone architecture in high-resolution magnetic resonance imaging (HR-MRI) of human cadaver calcaneus specimens. These parameters were compared to standard histomorphological structural measures and analyzed concerning performance in discriminating vertebral fracture status and estimating proximal femur fracture load. Sets of 60 sagittal 1.5 T and 3.0 T HR-MRI images of the calcaneus were obtained in 39 cadavers using a fast gradient recalled echo sequence. Structural parameters equivalent to bone histomorphometry and fuzzy logic-derived parameters were calculated using two chosen regions of interest. Calcaneal, spine, and hip bone mineral density (BMD) measurements were also obtained. Fracture status of the thoracic and lumbar spine was assessed on lateral radiographs. Finally, mechanical strength testing of the proximal femur was performed. Diagnostic performance in discriminating vertebral fracture status and estimating femoral fracture load was calculated using regression analyses, two-tailed t-tests of significance, and receiver operating characteristic (ROC) analyses. Significant correlations were obtained at both field strengths between all structural and fuzzy logic parameters (r up to 0.92). Correlations between histomorphological or fuzzy logic parameters and calcaneal BMD were mostly significant (r up to 0.78). ROC analyses demonstrated that standard structural parameters were able to differentiate persons with and without vertebral fractures (area under the curve [A(Z)] up to 0.73). However, none of the parameters obtained in the 1.5-T images and none of the fuzzy logic parameters discriminated persons with and without vertebral fractures. Significant correlations were found between fuzzy or structural parameters and femoral fracture load. Using multiple regression analysis, none of the structural or fuzzy parameters were found to add discriminative value to BMD alone. In summary significant correlations were obtained at both field strengths between all structural and fuzzy logic parameters. However, fuzzy logic-based calcaneal parameters were not well suited for vertebral fracture discrimination. Although significant correlations were found between fuzzy or structural parameters and femoral fracture load, multiple regression analysis showed limited improvement for estimating femoral failure load in addition to femoral BMD alone. Local femoral measurements are still needed to estimate femoral bone strength. Overall, parameters obtained at 3.0 T performed better than those at 1.5 T.
journal_name
Calcif Tissue Intjournal_title
Calcified tissue internationalauthors
Patel PV,Eckstein F,Carballido-Gamio J,Phan C,Matsuura M,Lochmüller EM,Majumdar S,Link TMdoi
10.1007/s00223-007-9058-5subject
Has Abstractpub_date
2007-10-01 00:00:00pages
294-304issue
4eissn
0171-967Xissn
1432-0827journal_volume
81pub_type
杂志文章abstract::The present study reports on the separation of fluid from soft, "cheeselike" enamel of porcine permanent teeth in the secretory stage, and the determination of its chemical composition. The enamel tissues were dissected from mandibles of 5 to 6-month-old piglets and pooled under mineral oil in centrifuge tubes, and th...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02555250
更新日期:1987-08-01 00:00:00
abstract::The effects of fluoride on human enamel and selachian enameloid in vitro were visualized in TEM and analyzed with electron diffraction. It is demonstrated that under precise pH conditions, inducing concentration balance between F-ions and apatite, calcium fluoride is no longer formed, and crystalline changes occur ins...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02409406
更新日期:1981-01-01 00:00:00
abstract::The effects of a series of novel phosphonates on the kinetics of mineral development in an ionophore-primed 7:2:1 phosphatidylcholine (PC): dicetylphosphate (DCP): cholesterol (Chol) liposomal model system are reported. When present at 2.5 micromol/liter or 25 micromol/liter concentrations in the solution surrounding ...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02509384
更新日期:1996-05-01 00:00:00
abstract::To define the quantitative aspects of ossification of human fetal spine, we performed a high resolution densitometric study by lateral and postero-anterior scanning of five fetal spines (18-36 weeks of conceptual age) and one spine of a 4-month-old infant. The data were plotted against developmental age for each spine...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF00299001
更新日期:1995-07-01 00:00:00
abstract::Calcium and phosphate were allowed to diffuse into gelatin and Type I collagen gels which were then cut into slices and analyzed for ion concentrations. Solutions of calcium and phosphate were then prepared, with ion concentrations equivalent to the highest levels in the slices, and mixed together, whereupon a rapid a...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02556459
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abstract::Familial hypocalciuric hypercalcemia (FHH) is often considered in the differential diagnosis of hyperparathyroidism, but is rarely diagnosed. So far, FHH has not been documented in Israel. This report presents preliminary evidence for the occurrence of FHH in Israel. ...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900290
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abstract::High resolution transmission electron microscopy (Hr TEM) studies on biological and synthetic calcium phosphate have provided information on the dissolution process at the crystal level. The purpose of this study was to investigate the dissolution of ceramic hydroxyapatite (HA) after implantation using Hr TEM. Recover...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02561408
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abstract::The dentin-enamel junction (DEJ) plays an important role in preventing crack propagation from enamel into dentin. This function stems from its complex structure and materials properties that are different from either dentin or enamel. The molecular structural differences in both mineral and organic matrix across the D...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-008-9212-8
更新日期:2009-03-01 00:00:00
abstract::The values of in vivo T1 relaxation time (T1) of phosphorus atoms of wrist bone have been measured by phosphorus-31 magnetic resonance spectroscopy (MRS) in 65 menopausal women separated into three groups: (1) age-matched women without any paraclinical or clinical osteoporosis; (2) patients with paraclinical osteoporo...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF00298583
更新日期:1995-06-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF01351838
更新日期:1993-11-01 00:00:00
abstract::The aim of this work was a preliminary assessment of the feasibility of using in vivo measurements of mechanical properties of bones to detect mineral loss and further to relate them to the tendency of the bone to fracture in the case of loss of minerals, such as in osteoporosis. Previous studies of bone strength in v...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF00298727
更新日期:1993-03-01 00:00:00
abstract::Twenty boys were followed during their puberty for about 2 years with examinations every third month. At each examination we determined serum concentrations of 25OHD3, 1,25(OH)2D3, 24,25(OH)2D3, 25.26(OH)2D3, alkaline phosphatase (AP) and testosterone together with bone mineral content (BMC) at the distal forearm. Hig...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02556871
更新日期:1986-03-01 00:00:00
abstract::Non-steroidal anti-inflammatory drugs (NSAID) have been recommended to prevent of heterotopic ossification (HO) after total hip arthroplasty (THA), but debates are still ongoing. The present Bayesian network meta-analysis of randomized clinical trials (RCTs) compared all available pathways of NSAID treatment as prophy...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-020-00763-7
更新日期:2021-02-01 00:00:00
abstract::Hyperthyroidism and thyroid hormone substitutive therapy with serum iT3 in the normal range of values are known to lead to increased bone remodeling and loss of bone mass. We looked for a relationship between serum iT3 and bone metabolic or bone mass parameters in 402 euthyroid women aged 44-60. In a group of 93 preme...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02565128
更新日期:1991-08-01 00:00:00
abstract::Even though indirect evidence indicates that PTH exerts an anabolic effect on dentinogenesis, the existence of PTH receptors and any second-messenger response in odontoblasts have not been demonstrated. The aim of this study was to investigate whether rat incisor odontoblasts express PTH receptors, and to identify whi...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900426
更新日期:1998-03-01 00:00:00
abstract::The five-year survival rate for primary bone cancers is ~ 70% while almost all cases of secondary metastatic bone cancer are terminal. Hypoxia, the deficiency of oxygen which occurs as the rate of tumour growth exceeds the supply of vascularisation, is a key promoter of tumour progression. Hypoxia-driven effects in th...
journal_title:Calcified tissue international
pub_type: 杂志文章,评审
doi:10.1007/s00223-017-0352-6
更新日期:2018-02-01 00:00:00
abstract::The acute-phase response (APR) is a frequent occurrence after infusion of zoledronic acid and is caused by activation of γδ T cells. Vitamin D receptor is expressed in immune cells, and vitamin D has immunomodulatory properties. The aim of this prospective study was to test the effect of vitamin D (cholecalciferol) on...
journal_title:Calcified tissue international
pub_type: 杂志文章,随机对照试验
doi:10.1007/s00223-012-9577-6
更新日期:2012-04-01 00:00:00
abstract::Crouzon syndrome is a debilitating congenital disorder involving abnormal craniofacial skeletal development caused by mutations in fibroblast growth factor receptor-2 (FGFR2). Phenotypic expression in humans exhibits an autosomal dominant pattern that commonly involves premature fusion of the coronal suture (craniosyn...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-013-9701-2
更新日期:2013-05-01 00:00:00
abstract::Serum immunoreactive osteocalcin (irOC) consists of two fractions that differ from each other by their affinity for hydroxyapatite. The high and low affinity fractions are referred to as irOCbound and irOCfree, respectively. To evaluate whether these fractions are determinants for different characteristics of bone or ...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900543
更新日期:1998-11-01 00:00:00
abstract::Seventy-two eugonadal women, mean age 39 +/- 4 years, with a z score for total body bone mineral content (BMC) of less than -1.5 (mean -1.80 +/- 0.12) were selected from a previous screening study of normal values of total body and regional BMC in women using dual-energy X-ray absorptiometry. The women were distribute...
journal_title:Calcified tissue international
pub_type: 临床试验,杂志文章
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02565132
更新日期:1991-08-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-018-0506-1
更新日期:2019-04-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-006-0008-4
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abstract::The aim of the investigation was to measure the effect of fluoride on vertebral trabecular bone compressive strength and to correlate this with fluoride-induced changes in bone density. This correlation would express changes in the quality of bone during fluoride treatment. Pigs were used in the experiment because the...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02556693
更新日期:1987-06-01 00:00:00
abstract::To test the hypothesis that the relationship between fat mass (FM) and bone mineral density (BMD) is mediated by leptin. The study involved 611 individuals aged 20-89 years who were randomly sampled from Ho Chi Minh City (Vietnam). BMD at the femoral neck (FN), lumbar spine (LS), and whole body (WB) was measured by DX...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-016-0196-5
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abstract::The aims of this study were to compare the response to therapy in disease activity in pagetic patients with and without skull involvement and the usefulness of bone markers in the evaluation of these patients. Forty patients with Paget's disease treated with tiludronate and 26 healthy controls were included. Serum tot...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-005-0247-9
更新日期:2006-07-01 00:00:00
abstract::Each of the presently available noninvasive methods used to determine the nature and degree of changes in skeletal mass has significant advantages and limitations. Dual photon absorptiometric techniques generally have a very low radiation dose. They are also less expensive to construct than other systems. However, the...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02411281
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abstract::The present study examined calcium phosphate precipitation in aqueous suspensions of multilamellar liposomes as a possible in vitro model for matrix vesicle mineralization. Liposomes were prepared by dispersing CHCl3-evaporated thin films of 7:2:1 and 7:1:1 molar mixtures of phosphatidylcholine, dicetyl phosphate, and...
journal_title:Calcified tissue international
pub_type: 杂志文章
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02556592
更新日期:1986-01-01 00:00:00
abstract::Ribbon-like crystals, from developing enamel of human fetuses, were studied by high resolution electron microscopy. These crystals were classically described as the first organized mineral formed during amelogenesis. They were characterized by a mean width-to-thickness ratio (W.T-1) of 9.5, and 40% were bent. On latti...
journal_title:Calcified tissue international
pub_type: 杂志文章
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