VoTracer Segmentation

Segmentation Top ← this page

• 1) Segmentation Slice By Slice
• 2) Segmentation Region Growing
• 3) Segmentation Graph Cut
• 4) Segmentation Curved Cylinder
• 5) Segmentation Contour Mesh (B-HRBF)

Volume segmentation is a task where ROIs (regions of interest) are cutout and assign a region ID.
In VoTracer [0-255] region IDs are available. (note ID:0 is the initial ID for all voxels.)
Each voxel have a single ID. (it is impossible to assign multiple IDs for a voxel.)

領域分割とは，興味のある領域ごとに異なるIDを塗り分けていく作業です．
VoTracerでは，256個のIDが利用できます(ただし0は初期領域IDのなので実質1-255の255個のIDが利用可能です)
各画素につけられるIDは１つだけです．(ある画素が領域A(ID1)にも領域B(ID2)にも含まれる，ような抽出は行えません．)

• At the beginning, all voxel has ID:0.
• By using segmentation tools, you can cutout a ROI and assign IDs to it.
• It is also possible to cutout ROI from already segmented ROIs.

1) Select "Menu > ModeSwitch > Segmentation * " to start segmentation mode
In VoTracer, 5 segmentation tools are available.

1. Segmentation Slice By Slice　 -- Tool for paint region ID on each slice (full manual segmentation)．
2. Segmentation Region Growing -- Thresholding tool and region growing segmentation tool ．
3. Segmentation Graph Cut -- Graph Cut Image Segmentation.
4. Segmentation Curved Cylinder -- Interactive tool for segmenting linear region (e.g. blood vesseles)．
5. Segmentation Contour Mesh (B-HRBF)　-- Interactive tool for segmenting region by contours．

2) Select the target region IDs

When starting segmentation tool, it is necessary to select segmentation target region (ID) from which a new ROI will be cutout. When target region selection dialog appear (left), select multiple target regions and press OK. Subsequent segmentation operation affects only the selected target region. Non-selected regions are locked and do not change.． At the beginning, all voxels have ID:0, and then select ID:0. 例1) 上図の骨や筋肉の抽出時は，全体についた初期領域ID=0を選択すれば良い． 例2) 上図の筋肉(ID=3)領域の内の腫瘍を抽出する場合，領域ID=3を選択すれば良い．

3) Cutout ROI (Region of Interst)
Cutout ROI by using segmentation tools above.
See page of each tool for detail.


4) Assign ID for the obtain ROI.
After cutting out a ROI by a segmentation tool, a new region ID can be assigned to it. After obtaining ROI, i) press “finish” button (in segmentation tool dialog), and select new ID from a dialog.