Bone densitometry by dual energy methods

Osteoporosis is mainly diagnosed by means of bone densitometry. Dual X-ray absorptiometry examinations represent the basis for a highly reproducible a nd correct measurement. At present, densitometry is the only method at our disposal capable of assessing material-related fracture risk. The calculati on of general fracture risk is dependent on a number of varies factors and is, therefore, not to be deduced from bone density values only. Reference v alues are necessary in order to estimate bone strength. The most sensible w ay to achieve this is to compare measured values with a normal, healthy pop ulation (T score). Material-related fracture risk increases with the decrea se of bone density.