Performance of PROPELLER relative to standard FSE T2-weighted imaging in pediatric brain MRI.
Pediatr Radiol
; 39(10): 1038-47, 2009 Oct.
Article
em En
| MEDLINE
| ID: mdl-19669747
ABSTRACT
BACKGROUND:
T2-weighted fast spin-echo imaging (T2-W FSE) is frequently degraded by motion in pediatric patients. MR imaging with periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) employs alternate sampling of k-space to achieve motion reduction.OBJECTIVE:
To compare T2-W PROPELLER FSE (T2-W PROP) with conventional T2-W FSE for (1) image quality; (2) presence of artefacts; and (3) ability to detect lesions. MATERIALS ANDMETHODS:
Ninety-five pediatric patients undergoing brain MRI (1.5 T) were evaluated with T2-W FSE and T2-W PROP. Three independent radiologists rated T2-W FSE and T2-W PROP, assessing image quality, presence of artefacts, and diagnostic confidence. Chi-square analysis and Wilcoxon signed rank test were used to assess the radiologists' responses.RESULTS:
Compared with T2-W FSE, T2-W PROP demonstrated better image quality and reduced motion artefacts, with the greatest benefit in children younger than 6 months. Although detection rates were comparable for the two sequences, blood products were more conspicuous on T2-W FSE. Diagnostic confidence was higher using T2-W PROP in children younger than 6 months. Average inter-rater agreement was 87%.CONCLUSION:
T2-W PROP showed reduced motion artefacts and improved diagnostic confidence in children younger than 6 months. Thus, use of T2-W PROP rather than T2-W FSE should be considered in routine imaging of this age group, with caution required in identifying blood products.
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Base de dados:
MEDLINE
Assunto principal:
Algoritmos
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Encéfalo
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Encefalopatias
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Interpretação de Imagem Assistida por Computador
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Aumento da Imagem
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Artefatos
Tipo de estudo:
Diagnostic_studies
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Evaluation_studies
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Prognostic_studies
Limite:
Female
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Humans
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Male
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Newborn
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article