title: [In vivo densitometry of the skeleton by single energy CT body scanner for clinical use. Technical procedure. Cross-sectional study of 124 subjects on the role of age and sex. Evaluation of the cortical/spongiosa ratio as a function of age].
abstract: CT 5005 EMI Scanner 140 kVp. Abstraction of the HN in the cortical of the right femural diaphysis and in the spongiosa of the vertebral body (L1). 124 clinically normal subjects of both sexes (63 males and 61 females), aged between 20 and 87 years were grouped into 7 categories according to age decade. Cortical-male - The variations of bone mineral content are not correlated either with age or with sex. Cortical-female - Modest correlation with age but not calculable with sex. Spongiosa-male - Excellent correlation with age (r = --0,975; (p less than 0,005). In each decade the average male values are superior to the female values. Spongiosa-female - Excellent linear correlation with age (r = --0,945; p less than 0,005). The average values for each decade are inferior to those of the males. The cortical/spongiosa ratio increases in relation to age: in males (r = --0,896; p less than 0,01) and in females (r = --0,885; p less than 0,01). The bone mineral content loss in the IX decade compared to the III decade is equal in males and in females in both the cortical (--20%) and the spongiosa (--65%). The reduction curves with the CT body scanner are not comparable to those obtained with other techniques. They result as being compatible with those obtained through histomorphometry (trabecular bone density).
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000375:Aging; D001842:Bone and Bones / Q000000981:diagnostic imaging*; D002113:Calcification, Physiologic; D003430:Cross-Sectional Studies; D003720:Densitometry / Q000295:instrumentation / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011877:Radionuclide Imaging; D012737:Sex Factors; D014057:Tomography, X-Ray Computed / Q000295:instrumentation* / Q000379:methods
vernacular_title: Densitometria "in vivo" dello scheletro con TC body a singola energia per uso clinico. Procedimento tecnico. Studio trasversale in 124 soggetti in funzione dell'età e del sesso. Valutazione del rapporto corticale/spongiosa in funzione dell'età.