Quantitative analysis of the effect of energy separation in k-edge digital subtraction imaging.
Phys Med Biol
; 52(11): 3015-26, 2007 Jun 07.
Article
em En
| MEDLINE
| ID: mdl-17505086
ABSTRACT
The aim of the work is to quantitatively compare the effect of the energy separation in the k-edge digital subtraction imaging technique. Images of a custom-made, iodine filled (k-edge = 33.17 keV) test object have been acquired with monochromatic x-ray beams (energy spread <0.1 keV) at the ID17 biomedical beamline of the ESRF. Image acquisition has been performed using two energy separations, namely 0.65 keV (32.85 keV and 33.5 keV, respectively) and 4.4 keV (31.2 keV and 35.6 keV, respectively), using beams of energies on either side of the iodine k-edge. Signal and signal-to-noise ratio (SNR) analysis has been performed as a function of DeltaE and the contrast medium concentrations. The results show that the SNR values measured for DeltaE < 1 keV are only slightly higher than those measured for DeltaE = 4.4 keV. This preliminary study shows that monochromaticity and the energy separation obtained with quasi monochromatic beams from conventional x-ray sources might be suitable for this imaging technique.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Diagnóstico por Imagem
/
Intensificação de Imagem Radiográfica
/
Técnica de Subtração
/
Síncrotrons
Tipo de estudo:
Diagnostic_studies
/
Risk_factors_studies
Limite:
Humans
Idioma:
En
Revista:
Phys Med Biol
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Itália