Fig. 2From: Impact of region-of-interest method on quantitative analysis of DTI data in the optic tractsSchematic illustration of an ROI (blue squares) of the left optic tract. All ROIs aimed to start at the posterior part of the optic chiasm and to include the central portion of the optic tract. The most anterior 15 mm of all optic tracts could be clearly identified in all subjects, thus the length of an ROI was set to cover a 15 mm anterior-to-posterior distanceBack to article page