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DTI Artifacts in IBIS Data Visible in Color FA

DTI Artifacts in IBIS Data Visible in Color FA. All-Over Red Artifact. Red covering most of the brain. Notice “flattened” appearance of the tracts as they track laterally instead of superiorly in line with the red coloring. Regional Artifact.

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DTI Artifacts in IBIS Data Visible in Color FA

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  1. DTI Artifacts in IBIS DataVisible in Color FA

  2. All-Over Red Artifact Red covering most of the brain • Notice “flattened” appearance of the tracts as they track laterally instead of superiorly in line with the red coloring

  3. Regional Artifact Red artifacts that cover a region of the brain, not a local artifact or a anterior/posterior artifact • Example, frontal lobe • Genu is tracking into the regional artifact • Blue “border” is unrelated to all regional artifacts, but is present in this case

  4. Anterior/Posterior Red artifact: Genu and Splenium “Wrapping” • Red artifact found in anterior and posterior sections of the brain • Almost always associated with “wrapping” of genu and splenium into the red sections • “Wrapping” effect varies with each case, to the left is a severe example

  5. Local artifact Smaller, localized regions of red artifact • Occasionally, tracking into an artifact occurs • Rarely, the artifact is visible in DWIs in certain gradients and may be removed

  6. Local artifactLocal artifacts visible in DWIs • If visible in DWIs, many times local artifacts are present across numerous gradients • However, some cases occur only in certain gradients, and these gradients are excluded • These exclusions range in efficacy from “some effect” to “no effect” on visibly red artifacts

  7. “Borderline” red artifacts Local and anterior/posterior red artifacts that show little to no evidence of abnormality within fiducial seeding QC pipeline • Example, small red artifact in frontal lobe • All other major tracts appear to have usual shapes • One tract (genu in this case) displaying some abnormality

  8. Unusual Color • Isolated case displaying highly unusual green “coloration” • Fiducial seeding produced distorted and shifted tracts (sagittal view)

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