Dual photon absorptiometry using a gamma camera.
The most common technique for bone mineral densitometry is Dual Photon Absorptiometry with a dedicated scanning device. In principle, a gamma camera could be adapted to perform the same function, but little work along these lines has been reported in the literature. Tests made using a standard gamma camera with a 153Gd source at the focus of a magnifying collimator show that satisfactory results can be obtained on water/aluminium phantoms. A calibration is used to help ensure long term precision and stability. Measurements made using the same equipment but 241Am/99mTc sources gave poor results.
Gledhill
M
M
Department of Physics, University of Otago, Dunedin, New Zealand.
McQueen
M
M
D015502:Absorptiometry, Photon / Q000295:instrumentation / Q000379:methods*; D015519:Bone Density / Q000502:physiology; D002138:Calibration; D008954:Models, Biological; D008961:Models, Structural