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Titolo:
VERTEBRAL BONE-DENSITY EVALUATED BY DUAL-ENERGY X-RAY ABSORPTIOMETRY AND QUANTITATIVE COMPUTED-TOMOGRAPHY IN-VITRO
Autore:
EBBESEN EN; THOMSEN JS; BECKNIELSEN H; NEPPERRASMUSSEN HJ; MOSEKILDE L;
Indirizzi:
ODENSE UNIV HOSP,DEPT ENDOCRINOL DK-5000 ODENSE C DENMARK ODENSE UNIV HOSP,DEPT RADIOL DK-5000 ODENSE C DENMARK UNIV AARHUS,INST ANAT,DEPT CELL BIOL AARHUS DENMARK
Titolo Testata:
Bone (New York, N.Y.)
fascicolo: 3, volume: 23, anno: 1998,
pagine: 283 - 290
SICI:
8756-3282(1998)23:3<283:VBEBDX>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
BODY COMPRESSIVE STRENGTH; MINERAL DENSITY; LUMBAR SPINE; GENDER DIFFERENCES; TRABECULAR BONE; OSTEOPOROSIS; PREDICTION; DIAGNOSIS; MASS; DENSITOMETRY;
Keywords:
DUAL-ENERGY X-RAY ABSORPTIOMETRY; QUANTITATIVE COMPUTED TOMOGRAPHY; VERTEBRAE; DENSITOMETRY; AGE-RELATED DIFFERENCES; GENDER-RELATED DIFFERENCES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
E.N. Ebbesen et al., "VERTEBRAL BONE-DENSITY EVALUATED BY DUAL-ENERGY X-RAY ABSORPTIOMETRY AND QUANTITATIVE COMPUTED-TOMOGRAPHY IN-VITRO", Bone (New York, N.Y.), 23(3), 1998, pp. 283-290

Abstract

Vertebral bone density is evaluated mainly by dual-energy X-ray absorptiometry (DSA) or quantitative computed tomography (QCT), Densitometry is used as an estimator of bone strength and forms the basis for choice of treatment. DSA expresses bone density in grams per square centimeter (area density) and QCT expresses bone density in milligrams per cubic centimeter (volumetric density). The aim of this study was to identify the differences between the two techniques, DXA and QCT, when applied to a group of female and male subjects over a wide age range. The data consisted of 221 lumbar vertebral bodies (L3 and L4) excised at autopsy, There were 90 females with a mean age of 65.6 (range 18-94)years and 131 males with a mean age of 62.0 (range 21-94) years. The vertebrae were scanned en bloc in demineralized water in Plexiglas containers with both DXA and QCT, DXA was performed using posteroanterior(PA) and lateral projection. QCT was performed in the center of each vertebra with 1 cm slice thickness. Both methods shelved decreasing bone density with age, Lateral DXA showed a decrease in bone density with age from approximately 0.8 g/cm(2) to approximately 0.4 g/cm(2), QCTshowed a decrease in bone density with age from approximately 180 mg/cm(3) to approximately 30 mg/cm(3), Lateral DXA bone mineral densities(BMD) were correlated with QCT densities in both females (r(2) = 0.68, p < 0.00001) and males (r(2) = 0.53, p < 0.00001), but females had constantly lower DXA BMDs than males at a given QCT density, QCT and width-adjusted midlateral DXA (g/cm(3)) were significantly correlated, with r(2) = 0.64 (p < 0.00001) for females and r(2) = 0.61 (p < 0.00001) for males. In conclusion, age- and gender-related differences in human vertebral bone density were shown to be dependent on the scanning method used, DXA bone mineral content (BMC) and BR ID showed that females had lower values than males at all ages. When the ''volumetric'' DXA measurements and QCT were used, the females had the highest densities in the younger decades and males had the highest densities in the oldest decades. Finally, the area density (BMD) measured by DXA was lower in females than in males with identical QCT volumetric bone densities, (Bone 23:283-290; 1998) (C) 1998 by Elsevier Science Inc, All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 16:05:12