[The clinical application of quantitative computed tomography to osteoporosis and it's related disorders].

: Bone mineral in spinal vertebral bone, using the methods of single and dual energy tomographies (SEQCT and DEQCT) were applied to the studies of osteoporosis. The measurement of bone mineral in spinal bone with DEQCT was useful for elimination of fat mass effect in bone marrow, but has poorer reprocibility and higher dose-expose of radioactivity, compared with these of bone mineral by the SEQCT method. Bone mineral in the third lumbar spine of osteoporosis patients without bone fracture was employed in the SEQCT method, indicated that bone loss was age dependent in both sex and bone mineral showed O level which might be influenced by the fat mass in the marrow. The fat mass in the marrow was age-dependent. Bone mineral, in addition to fat mass effect was evaluated to give a diagnosis of osteoporosis. Physical activity was responsible for an increase of bone mineral. The more disable physical activity life was, the more diminished bone mineral was. The role of bone mineral was rationally distributed, and unbalanced bone mineral disposition permitted to induction into the degenerative central nervous system. The measurement of bone mineral in the spinal bone by the SEQCT method made possible a diagnosis and prevention of osteoporosis and observation of the therapeutic effect and clinical course was possible in osteoporosis patients.