Sliding thin-slab acquisition of three-dimensional mra data

Details Sliding thin-slab acquisition of three-dimensional mra data Sliding thin-slab acquisition of three-dimensional mra data

A - Human Necessities

61

B

A61B 6/02 (2006.01) G01R 33/54 (2006.01) G01R 33/563 (2006.01) G01R 33/565 (2006.01)

Patent

CA 2221549

A 3DFT gradient-recalled echo pulse sequence is employed to acquire NMR data from which an MR angiogram is produced. A thin slab excitation is employed and this thin slab is incremented in slice-thickness steps through the volume of interest as the NMR data is acquired. Navigator echoes are acquired at each thin slab location to correct the NMR data for phase errors produced by the sliding slab technique.

Une séquence d'impulsions d'écho rappelées par gradient 3DFT permet d'acquérir des données RMN (résonance magnétique nucléaire) destinées à la production d'un angiogramme RM. Une excitation par couche mince est utilisée, l'épaisseur de la couche étant accrue par étapes dans le volume d'intérêt à mesure que les données RMN sont acquises. Des échos de navigateur sont acquis à chaque emplacement de couche mince afin de corriger dans les données RMN les erreurs de phase dues à la technique des couches « mobiles ».

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