Abstract
AbstractPurpose to evaluate the feasibility and to compare the results of different algorithms of tractography by diffusion weighted (DWI) magnetic resonance imaging (MRI) coupled with retinotopy by functional MRI (fMRI) at 1,5 tesla, to study the optic radiations.Methods one healthy subject had: (1) a fMRI with visual stimulations by sectorial contrast alternating checkerboard patterns (2) a DWI MRI and (3) anatomical acquisitions. Optic radiations were tracked by both deterministic and probabilistic algorithms, using anatomical and functional data.Results the optic radiations reconstructions agreed with literature data. The deterministic reconstruction algorithm is conceivable in current practice, and can correctly tracked the optic radiations with a good view of the Meyer loop, unlike the probabilistic reconstruction algorithm, whose post treatment is long and results disappointing.Conclusion tractography coupled with the retinotopy is feasible at 1,5 tesla to study the optic radiations with deterministic reconstruction algorithm but not with probabilistic algorithm.
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