Comparison of inhomogeneity distortion correction methods in diffusion MRI of the spinal cord

Haykel Snoussi (1) , Emmanuel Caruyer (1) , Olivier Commowick (1) , Elise Bannier (1, 2) , Anne Kerbrat (3) , Christian Barillot (1)

1 VisAGeS - Vision, Action et Gestion d'informations en Santé
2 Département de Radiologie [CHU de Rennes]
3 Service de Neurologie [Rennes] = Neurology [Rennes]

Purpose / Introduction Diffusion MRI (dMRI) is a modality that describes the geometry of neural architecture. Diffusion images suffer from various artifacts originating from subject and physiological motion, eddy currents and B0-field inhomogeneity. These can severely affect image quality particularly in the spine region. However, strategies exist to correct these distortions, including co-registration, point spread function, phase field map and reversed gradient polarity method (RGPM). In this work, we focus on the comparative evaluation of correction methods using RGPM which provides best results [1]. More precisely, we compare Voss [1,2] plus two other recent methods: FSL’s Topup [3] and SPM’s HySCO [4].

Domaines: Ingénierie biomédicale

Haykel Snoussi, Emmanuel Caruyer, Olivier Commowick, Elise Bannier, Anne Kerbrat, et al.. Comparison of inhomogeneity distortion correction methods in diffusion MRI of the spinal cord. ESMRMB - 34th Annual Scientific Meeting European Society for Magnetic Resonance in Medecine and Biology, Oct 2017, Barcelone, Spain. ⟨inserm-01579134v2⟩