title: Phantom studies of triple photon absorptiometry and bone mineral measurement at a hip prosthesis.
abstract: The feasibility of using triple photon absorptiometry (TPA) for the measurement of bone mineral mass about a hip prosthesis was examined. A theoretical expression describing the variance of TPA measurements was verified using a triple photon source and phantom materials which simulate the soft tissue-bone mineral-metal prosthesis system. The expression for the variance was used to determine an optimized set of photon energies. It was shown that a precision of 3% could be obtained for reasonable measurement times using this optimized set of energies, and that TPA should be a feasible approach for measurement of bone mineral about a hip prosthesis.
authors.affiliation: Department of Nuclear Medicine, Chedoke McMaster Hospitals, Hamilton, On, Canada.
authors.forename: T J
authors.initials: TJ
authors.lastname: Farrell
authors.forename: C E
authors.initials: CE
authors.lastname: Webber
mesh_terms: D015502:Absorptiometry, Photon / Q000379:methods*; D015519:Bone Density; D006622:Hip Prosthesis; D006801:Humans; D008961:Models, Structural; D008962:Models, Theoretical