A comparison of mean displacement values using high b-value Q-space diffusion-weighted MRI with conventional apparent diffusion coefficients in patients with stroke.
Acad Radiol
; 18(7): 837-41, 2011 Jul.
Article
em En
| MEDLINE
| ID: mdl-21419670
ABSTRACT
RATIONALE AND OBJECTIVES:
Q-space analysis using high b-value diffusion-weighted magnetic resonance (MR) data provides information on tissue microstructure in contrast to conventional MR imaging (MRI) based on low b-value diffusion-weighted imaging (DWI). The purpose of this study was to evaluate the use of mean displacement (MDP) map in stroke patients using q-space diffusion-weighted MRI (QSI). MATERIALS ANDMETHODS:
Twenty-one patients presenting with a total of 22 acute or subacute cerebral infarctions were included. MR protocol consisted of conventional MR sequences, DWI (b-value; 1000 s/mm(2)) and QSI (b-value; maximum 12,000 s/mm(2)). Apparent diffusion coefficient (ADC) maps of conventional DWI and MDP maps of QSI data were obtained and compared in the ischemic lesions and corresponding normal tissues.RESULTS:
Decreased ADC values were present in all lesions. There was no correlation between ADC and MDP values in the lesions (r = 0.21). MDP values of the lesions were 8.60 ± 1.26 µm (mean ± SD). Most of the lesions (16/22) had higher MDP values than normal brain tissue. Three lesions showed lower MDP values and three showed mixed MDP values.CONCLUSIONS:
The MDP maps using QSI data provides additional information for stroke patients compared to conventional DWI.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Algoritmos
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Imageamento por Ressonância Magnética
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Aumento da Imagem
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Acidente Vascular Cerebral
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Infarto Encefálico
Tipo de estudo:
Diagnostic_studies
Limite:
Adult
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Aged
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Aged80
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Acad Radiol
Assunto da revista:
RADIOLOGIA
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Japão