X線CTによる椎体海綿骨の骨塩量の定量的評価 : 健常例における検討

概要

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127 normal values of spinal trabecular bone mineral content (BMC) for 67 males (age range : 20〜77) and 60 females (age range : 23〜76) were studied by quantitative computed tomography (QCT). We have measured L1, L2 and L3 vertebrae, but there is no signifcant difference between L1, L2 and L3 BMC, so we caliculated the individual BMC from the average of the three vertebrae data. The BMC value was found to be greatly enfluenced by age. Its maximum at the age of 20 years for males and females, and decreases gradually with an increase in age with a much more reduction seen in the females. The mean value of BMC for the males was approximately 171 mg/ml K_2HPO_4 equivalent to the 20-40 age range years and the females was approximately 183 mg/ml, so that by the age 70, the males were reduced by 35% to approximately 110 mg/ml, the females were reduced by 50% to approximately 92 mg/ml. The interrelation was analyzed by using a cubic regression study which revealed an adequate correlation (r=0.77 in the males, r=0.85 in the females) between BMC and age.
公益社団法人日本放射線技術学会の論文
1988-11-01