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47.7 MB (5.7 MB compressed)
3347 x 4986 pixels
28.4 x 42.2 cm ⏐ 11.2 x 16.6 in (300dpi)
J.C. REVY, ISM / SCIENCE PHOTO LIBRARY J.C. REVY, ISM / SCIENCE PHOTO LIBRARY
Osteoporosis: false-colour dual photon densitometry scan of part of the spine of a woman suffering from mild osteoporosis (brittle bone disease). The colour-coding shows the variation in bone mineral density, from yellow (most dense) through blue to green (least dense). The mean value in this case was 0.776 gcm-2; bone is considered to be osteoporotic below 0.8 gcm-2. Osteoporosis describes a reduction in bone density, resulting in an increase in brittleness and a greater risk of fractures, particularly of the vertebrae & the head of the femur. Its higher incidence in women is attributed to a decline in hormone production following the menopause.
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