Projects/Diffusion/2007 Project Week Contrasting Tractography Measures/ROI Definitions
Contents
Boundaries for the ROI's, mainly using FA maps & color by orientation, followed by the color coding of the labelmaps.
Cingulum Bundle
ROI 1) on the superior side of the corpus, flush with the most anterior part of the corpus (based on sag view, but drawn on coronal view)
ROI 2) on the first coronal slice where the L & R corpus connect, on the superior side of the corpus.
ROI 3) on the first coronal slice where the L & R corpus connect, on the inferior side of the corpus.
ROI 4) on the first coronal slice where the meddle cerebellar peduncle is present.
- 7= Left ROI 1
- 9= Left ROI 2
- 11= Left ROI 3
- 13= Left ROI 4
- 8= Right ROI 1
- 16= Right ROI 2
- 12= Right ROI 3
- 14= Right ROI 4
Fornix
ROI 1) on Coronal view, the first slice where the middle cerebellar peduncles are present
ROI 2) posterior to ROI 1; large blobs drawn on coronal view where the middle cerebellar peduncle is clearly connected at bottom of slice
- 7= ROI 1 for both Left and Right
-
- 11 or 13 = Left ROI 2
- 12 or 14 = Right ROI 2
[[Image:Fornix2ROIs.png|thumb|left|300px|Fornix ROI 2 (right)]
IC - Internal Capsule
ROI 1) find anterior commisure on axial view and draw ROI on coronal slice on each side on midsag line
Top boundary for ROI 1: Caudate/putamen line
Bottom boundary for ROI 1: draw entire plane of AC; IC is only superior to AC line.
ROI 2) go to the anterior most point of the corpus collosum according to saggital view. Draw ROI so it covers entire (left or right) hemisphere of brain on the perpendicular Coronal Slice.
- 7= Left ROI 1
- 11= Left ROI 2
-
- 8= Right ROI 1
- 12= Right ROI 2
-
- 15= Inferior Boundary... do not track from this.
unc - Uncinate Fasciculus
Find the most prominant (central) slice of the fornix according to saggital view. Go one slice anterior to the most anterior point of the fornix and draw Left and Right ROI 1 and ROI 2.
- 7= Left ROI 1
- 11= Left ROI 2
-
- 8= Right ROI 1
- 12= Right ROI 2
