DUAL-ENERGY X-RAY ABSORPTIOMETRY OF LUMBAR VERTEBRAE - RELATIVE CONTRIBUTION OF BODY AND POSTERIOR ELEMENTS AND ACCURACY IN RELATION WITH NEUTRON-ACTIVATION ANALYSIS

被引:27
作者
LOUIS, O
VANDENWINKEL, P
COVENS, P
SCHOUTENS, A
OSTEAUX, M
机构
[1] UNIV LIBRE BRUXELLES,HOP ERASME,DEPT NUCL MED,B-1050 BRUSSELS,BELGIUM
[2] VRIJE UNIV BRUSSELS,AKAD ZIEKENHUIS,DEPT CYCLOTRON,B-1090 BRUSSELS,BELGIUM
关键词
OSTEODENSITOMETRY; BONE MINERAL CONTENT; CALCIUM CONTENT;
D O I
10.1016/8756-3282(92)90076-9
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
The bone mineral content of 34 lumbar vertebrae obtained from ten cadavers (three men, seven women; age 61-88 years) was measured using a pulsed source dual-energy X-ray absorptiometry (DEXA) apparatus. Scanning was performed in the frontal projection and was repeated on the vertebral bodies obtained after removal of the posterior elements of the vertebrae. Subsequently a nondestructive neutron activation analysis (NAA) was performed. The mineral content of the vertebral bodies was found to represent (mean, SEM) 53.0% (1.9%) of the content of the whole vertebrae. The mineral content of the vertebral bodies assessed with NAA (BMC NAA) and with DEXA (BMC DEXA) showed a high correlation: BMC NAAA = (1.016 x BMC DEXA) + 0.990 r = 0.949 (p < 0.001). We conclude that the mineral content of lumbar vertebral bodies can be accurately measured in vitro in a water environment by DEXA, and that the mean contribution of the posterior elements of the vertebra to the calcium hydroxyapatite content of whole vertebrae measured in the frontal projection is as high as 47.0%.
引用
收藏
页码:317 / 320
页数:4
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