Polynomial dual energy inverse functions for bone Calcium/Phosphorus ratio determination and experimental evaluation.
Appl Radiat Isot
; 118: 18-24, 2016 Dec.
Article
em En
| MEDLINE
| ID: mdl-27571965
ABSTRACT
An X-ray dual energy (XRDE) method was examined, using polynomial nonlinear approximation of inverse functions for the determination of the bone Calcium-to-Phosphorus (Ca/P) mass ratio. Inverse fitting functions with the least-squares estimation were used, to determine calcium and phosphate thicknesses. The method was verified by measuring test bone phantoms with a dedicated dual energy system and compared with previously published dual energy data. The accuracy in the determination of the calcium and phosphate thicknesses improved with the polynomial nonlinear inverse function method, introduced in this work, (ranged from 1.4% to 6.2%), compared to the corresponding linear inverse function method (ranged from 1.4% to 19.5%).
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fósforo
/
Osso e Ossos
/
Algoritmos
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Interpretação de Imagem Radiográfica Assistida por Computador
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Absorciometria de Fóton
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Cálcio
Tipo de estudo:
Diagnostic_studies
/
Evaluation_studies
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Prognostic_studies
/
Risk_factors_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article