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Commit 05e3b786 authored by Stephen Smith's avatar Stephen Smith
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CVS: ----------------------------------------------------------------------

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...@@ -12,10 +12,11 @@ from that voxel reaching the target mask. <b>find_the_biggest</b> classifies ...@@ -12,10 +12,11 @@ from that voxel reaching the target mask. <b>find_the_biggest</b> classifies
seed voxels according to the target mask with which they show the highest seed voxels according to the target mask with which they show the highest
probability of connection. It is run as follows: probability of connection. It is run as follows:
<p><b>find_the_biggest list_of_volumes outputname</b> <p><b>find_the_biggest list_of_volumes outputname</b>
Where the list of volumes is the outputs of <b>Connectivity based seed Where the list of volumes is the outputs of <b>Connectivity-based seed
classification</b> (i.e., files named seeds_to_target1 etc etc) and threshold classification</b> (i.e., files named seeds_to_target1 etc etc).
is experessed as a number of samples
<p><IMG ALIGN=RIGHT height=300 SRC="fdt_images/fdt_seeds2targets_thal.gif" <p><IMG ALIGN=RIGHT height=300 SRC="fdt_images/fdt_seeds2targets_thal.gif"
ALT="connectivity-based classification of thalamus"> ALT="connectivity-based classification of thalamus">
<p>The example on the right uses ProbTrack and find_the_biggest to perform hard segmentation <p>The example on the right uses ProbTrack and find_the_biggest to perform hard segmentation
of the thalamus on the basis of its connections to cortex of the thalamus on the basis of its connections to cortex.
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...@@ -9,4 +9,6 @@ possible to display these vectors using <b>RGB</b> coding (where the colours ...@@ -9,4 +9,6 @@ possible to display these vectors using <b>RGB</b> coding (where the colours
red,green and blue represent diffusion in the x,y,z axes respectively) or red,green and blue represent diffusion in the x,y,z axes respectively) or
using <b>lines</b> where a line at each voxel represent the principle using <b>lines</b> where a line at each voxel represent the principle
diffusion direction at that voxel. For more details see the relevant fslview diffusion direction at that voxel. For more details see the relevant fslview
<a href="http://www.fmrib.ox.ac.uk/fsl/fslview/dti_tutorial.html">tutorial</a> <a href="http://www.fmrib.ox.ac.uk/fsl/fslview/dti_tutorial.html"
\ No newline at end of file target="_top">tutorial</a>.
...@@ -3,7 +3,7 @@ BACKGROUND="fdt_images/fsl-bg.jpg"> ...@@ -3,7 +3,7 @@ BACKGROUND="fdt_images/fsl-bg.jpg">
<h3>proj_thresh</h3> <h3>proj_thresh</h3>
<b>proj_thresh</b> is a command line utility that provides an alternative way of <b>proj_thresh</b> is a command line utility that provides an alternative way of
expressing connection probability in connectivity-based segmentation. It is expressing connection probability in connectivity-based segmentation. It is
run on the output of <b>connectivity-based seed run on the output of the <b>connectivity-based seed
classification</b> mode within <a href="fdt_probtrack.html"> <b>ProbTrack</b></a>. classification</b> mode within <a href="fdt_probtrack.html"> <b>ProbTrack</b></a>.
<p>The output of <b>Connectivity-based seed classification</b> is a single volume for <p>The output of <b>Connectivity-based seed classification</b> is a single volume for
each target mask, named <b>seeds_to_{target}</b> where {target} is replaced each target mask, named <b>seeds_to_{target}</b> where {target} is replaced
...@@ -12,10 +12,10 @@ value of each voxel within the seed mask is the number of samples seeded ...@@ -12,10 +12,10 @@ value of each voxel within the seed mask is the number of samples seeded
from that voxel reaching the target mask. from that voxel reaching the target mask.
<br><b>proj_thresh</b> is run as follows: <br><b>proj_thresh</b> is run as follows:
<p><b>proj_thresh list_of_volumes threshold</b></p> <p><b>proj_thresh list_of_volumes threshold</b></p>
Where the list of volumes is the outputs of <b>Connectivity based seed Where the list of volumes is the outputs of <b>Connectivity-based seed
classification</b> (i.e., files named seeds_to_target1 etc etc) and threshold is experessed as a number of samples classification</b> (i.e., files named seeds_to_target1 etc etc) and threshold is expressed as a number of samples
<br>For each voxel in the seeds mask that has a value above threshold for at <br>For each voxel in the seeds mask that has a value above threshold for at
least target mask, <b>proj_thresh</b> calculates the number of samples reaching each target mask least one target mask, <b>proj_thresh</b> calculates the number of samples reaching each target mask
as a proportion of the total number of samples reaching any target mask. The as a proportion of the total number of samples reaching any target mask. The
output of <b>proj_thresh</b> is a single volume for each target mask, names output of <b>proj_thresh</b> is a single volume for each target mask.
<b>???</b> where seed voxels will have values between zero and one.
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