| Autor: |
R, Valkema, H, Prpic, J A, Blokland, J A, Camps, S E, Papapoulos, O L, Bijvoet, E K, Pauwels |
| Rok vydání: |
1994 |
| Předmět: |
|
| Zdroj: |
Acta radiologica (Stockholm, Sweden : 1987). 35(1) |
| ISSN: |
0284-1851 |
| Popis: |
A gamma camera was equipped with a special collimator and arm assembly for bone mineral measurements with dual photon absorptiometry (DPA). The system was evaluated in vitro and in vivo and compared both with a rectilinear DPA and a dual energy X-ray (DEXA) system. All 3 systems showed a linear response in measurements of 4 vials, containing different amounts of hydroxyapatite. Phantom measurements with the gamma camera system showed a precision of 1.6% to 2.8%. Results obtained in 8 healthy volunteers with rectilinear and gamma camera systems were well correlated (R2 = 0.78). With the photon beam directed from posterior to anterior, the separation of vertebrae was easy with the gamma camera system. We conclude that bone mineral measurements can be made with a gamma camera for assessment of fracture risk and in the decision process whether a patient needs treatment or not. For follow-up, the precision of DPA with a gamma camera is inadequate. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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