Difference between revisions of "Generating graphs"

Latest revision as of 20:22, 21 February 2012

MIPAV allows you to generate intensity profiles, or contour VOI graphs, for VOI contours. For delineated VOIs, you can generate 2D, 3D, or 4D intensity graphs. You can also generate a 3D intensity graph at a specific point across all slices in a dataset. For information on how to contour a VOI, refer to Chapter 1, "Segmenting Images Using Contours and Masks,"

Generating contour VOI graphs

Contour VOI graphs display the intensity values of the selected contour's boundary in the Contour VOI Graph window (Figure 10). You can generate either 2D or 3D contour VOI graphs.

To generate 2D contour VOI graphs
1 Open an image.
2 Delineate a 2D VOI on the image using one of the 2D icons in the MIPAV window.

3 Select the VOI.
As an option, copy the VOI to other slices in the dataset by selecting VOI > Propagate and one of the following commands:

• To Next Slice
  
• To Previous Slice
  
• To All Slices
  

4 Do one of the following:

• Select VOI > Graph > Boundary Intensity in the MIPAV window.
  
• Right click on the VOI and then select Graph > Boundary Intensity.
  
• The Contour VOI Graph window (Figure 10) opens.
  

To generate 3D contour VOI graphs
1 Open an image.
2 Delineate a VOI on the image using the 3D rectangular VOI icon, in the MIPAV window.
3 Select the VOI.
As an option, copy the VOI to other slices in the dataset by selecting VOI > Propagate and one of the following commands:

• To Next Slice
  
• To Previous Slice
  
• To All Slices
  

4 Do one of the following:

• Select VOI > Graph > Boundary Intensity in the MIPAV window.
  
• Right-click on the VOI and then select Graph > Boundary Intensity.
  

The Contour VOI Graph window (Figure 10) opens. This window displays a graph of the intensity values of the selected contour's boundary.

Generating intensity graphs

Intensity profiles, or graphs, present information on the intensity values of the VOI region in an image. The intensity graph appears in the Intensity Graph window (Figure 11).

To generate 2D intensity graphs
1 Open an image.
2 Delineate a 2D VOI on the image using one of the 2D icons in the MIPAV window.
< 3 Select the VOI.
As an option, copy the VOI to other slices in the dataset by selecting VOI > Propagate and one of the following commands:

• To Next Slice
  
• To Previous Slice
  
• To All Slices
  

4 Do one of the following:
Select VOI > Graph in the MIPAV window and either of the following:

• 2.5D Total Intensity -To generate a graph of the sum of the intensity values of the VOI region.
  
• 2.5D Average Intensity -To generate a graph of the average of the intensity values of the VOI region.
  

Right-click on the VOI and then select Graph and one of the following commands:

• 2.5D Total Intensity -To generate a graph of the sum of the intensity values of the area delineated by the VOI per slice.
  
• 2.5D Average Intensity -To generate a graph of the average of the intensity values of the VOI region.
  
• 2.5D Total Intensity with Threshold -TBD.
  
• 2.5D Average Intensity with Threshold -TBD.
  

The Intensity Graph window (Figure 11) opens.

To generate 3D intensity graphs of all slices in a dataset at a specific point
1 Open an image.
2 Draw a point VOI on the image (Figure 12).
3 Select the VOI.
4 Do one of the following:

• Select the Propagate VOI to all slices icon.
  
• Select VOI > Propagate > To All Slices.
  
• Right-click on the VOI, then select Propagate > To All Slices (Figure 12).
  

5 Right-click on the VOI and select Show VOI Graph (Figure 12).