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Improving detection of ischemic lesions at 3Tesla with optimized diffusion-weighted magnetic resonance imaging
- Source :
- Journal de Neuroradiologie / Journal of Neuroradiology, Journal de Neuroradiologie / Journal of Neuroradiology, Elsevier Masson, 2014, 41 (1), pp.45-51. ⟨10.1016/j.neurad.2013.04.003⟩, Journal de Neuroradiologie / Journal of Neuroradiology, 2014, 41 (1), pp.45-51. ⟨10.1016/j.neurad.2013.04.003⟩
- Publication Year :
- 2014
- Publisher :
- HAL CCSD, 2014.
-
Abstract
- International audience; BACKGROUND AND PURPOSE: This study compared three different combinations of DWI parameters: three and six diffusion imaging directions (3dir and 6dir, respectively) using b=1000 or 2000s/mm(2) (b1000 or b2000, respectively) to improve detection of recent ischemic lesions at 3Tesla (3T). MATERIALS AND METHODS: A total of 47 consecutive patients underwent three DWI scans: 3dir b1000; 6dir b1000; and 6dir b2000. Qualitative visual analysis was performed by three readers based on evaluation of the number of lesions, presence of artifacts and diagnostic confidence. Interobserver agreement, sensitivity, specificity, and positive and negative predictive values were calculated. RESULTS: Forty-five lesions were detected by 3dir b1000, 52 by 6dir b1000 and 56 by 6dir b2000 in 30 patients. The additional lesions identified by 6dir b2000 were either small or located in the posterior fossa. Sensitivity with 6dir b2000 was significantly higher than with 3dir b1000 (98.1% vs 77.4%; P
- Subjects :
- Adult
Male
medicine.medical_specialty
Posterior fossa
DWI
Sensitivity and Specificity
Brain Ischemia
Diffusion
Positive predicative value
Image Interpretation, Computer-Assisted
medicine
Humans
Radiology, Nuclear Medicine and imaging
[SDV.NEU] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]
Stroke
Aged
Aged, 80 and over
Observer Variation
Radiological and Ultrasound Technology
business.industry
Brain
Reproducibility of Results
Middle Aged
medicine.disease
Image Enhancement
Diffusion-Weighted Magnetic Resonance Imaging
Diffusion imaging
Diffusion Magnetic Resonance Imaging
Female
[SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]
Neurology (clinical)
Radiology
Nuclear medicine
business
MRI
Subjects
Details
- Language :
- English
- ISSN :
- 01509861
- Database :
- OpenAIRE
- Journal :
- Journal de Neuroradiologie / Journal of Neuroradiology, Journal de Neuroradiologie / Journal of Neuroradiology, Elsevier Masson, 2014, 41 (1), pp.45-51. ⟨10.1016/j.neurad.2013.04.003⟩, Journal de Neuroradiologie / Journal of Neuroradiology, 2014, 41 (1), pp.45-51. ⟨10.1016/j.neurad.2013.04.003⟩
- Accession number :
- edsair.doi.dedup.....2ef3e38579a84d2f09da24cab2d627f0