Enhanced gray-white matter differentiation on non-enhanced CT using a frequency selective non-linear blending.
Neuroradiology
; 58(7): 649-55, 2016 Jul.
Article
em En
| MEDLINE
| ID: mdl-26961306
ABSTRACT
INTRODUCTION:
The aim if this study is to find out if contrast between gray (GM) and white matter (WM) on non-enhanced brain CT (NECT) can be enhanced by using a frequency selective non-linear blending.METHODS:
Thirty consecutive patients (40 % female; mean age 67.73 ± 12.71 years), who underwent NECT of the brain, were retrospectively included in this study. Brain scan readings were performed by two radiologists independently, for NECT and subsequently the images were read using a new frequency selective non-linear blending algorithm (best contrast, BC). Optimal settings of BC for enhanced delineation of anatomical structures were set at an averaged center of 30 HU, averaged delta of 5 HU, and a slope of 5. For contrast-to-noise ratio calculation (CNR), gray and white matter attenuation values were measured for both NECT and BC in different anatomical structures.RESULTS:
CNR increase in the gray matter was 5.91 ± 2.45 for the cortical gray matter and 4.41 ± 1.82 for the basal ganglia. The contrast ratio between cortical gray and white matter was 1.87 and 1.7 (basal ganglia/WM) for BC quantification vs. 1.43 (cortex/WM) and 1.33 (basal ganglia/WM) for standard NECT (both p < 0.0001). Improved CNR did not depend on the anatomical structures measured.CONCLUSION:
Frequency selective non-linear blending allows better discrimination between WM and GM and therefore may enhance diagnostic accuracy of NECT.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Encéfalo
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Interpretação de Imagem Radiográfica Assistida por Computador
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Intensificação de Imagem Radiográfica
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Tomografia Computadorizada Multidetectores
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Substância Cinzenta
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Substância Branca
Tipo de estudo:
Diagnostic_studies
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Prognostic_studies
Limite:
Aged
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Female
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Humans
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Male
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article