Cropping images

You can adjust the appearance of graphs to interpret the information more clearly or easily. To customize graphs, you use the Modify Graph dialog box , which is accessible through Views > Modify Graph Features in both the Contour VOI window and the Intensity Graph window. The Modify Graph dialog box includes the following four tabbed pages:

• Graph tab, which allows you to show or hide the gridlines and tick marks, change the number of gridlines and background color of the graph, change the labels on the graph, and change the range values.
  
• Legend tab, which lets you determine whether a legend should appear on the graph and allows you to assign a specific name to each function.
  
• Functions tab , which allows you to change the appearance of the functions in the graph.
  
• Fitted Functions tab, which allows you to modify the functions.
  

Figure 13. The Graph page of the Modify Graph dialog box

Graph tab
Gridlines visible	Displays, if selected, gridlines on the graph in the Intensity Graph window.
Minor tick marks visible	Displays, if selected, the tick marks on the X and Y axes of the graph in the Intensity Graph window.
Number of X-axis gridlines	Indicates the number of gridlines that appear on the X axis of the graph. The default number of gridlines is 4. You can specify from 1 to 50 gridlines.
Number of Y-axis gridlines	Indicates the number of gridlines that display on the Y axis of the graph. The default number of gridlines is 4. You can specify from 1 to 50 gridlines.
Title	Specifies the name of the graph. By default, the name is Intensity Graph. However, you can replace this name with any name you choose.
X axis label	Specifies the name that appears for the X axis. By default, the name is Position on curve (mm).
Y axis label	Specifies the name that appears for the Y axis. By default, the name is Intensity.
Change background color	Allows you to choose the color of the background of the graph. When you select this icon, the Pick Background Color dialog box opens. By default, the background color for graphs is light gray. The HSB values are 0 hue, 0 saturation, and 100 brightness and the RGB values are 255 red, green, and blue.
Auto Shrink Range	Check/uncheck this box to expand or shrink the graph.
Min. for range	The default minimum range is 207,437.0. If you specify another range, it must be less than the default range.
Max for range	The default maximum range is 595,910.0. If you specify another range, it must be more than the default range.
Reset default range	Erases the current minimum and maximum ranges and replaces the values with the default minimum and maximum ranges.
Apply	Applies the changes you made in this dialog box.
Cancel	Disregards any changes you made in this dialog box, closes the dialog box, and does not change the threshold.
Help	Displays online help for this dialog box.

To display or hide the points, or tick marks, on graphs
1 Open an image.
2 Delineate a VOI on the image.
3 Generate an intensity profile (refer to "Generating graphs" ). Either the Contour VOI Graph window or the Intensity Graph window opens.
4 Select Views > Modify Graph Features in either the Contour VOI Graph window or the Intensity Graph window. The Graph page of the Modify Graph dialog box appears.
5 Do one of the following:
If you want to make the points appear on the graph, select Minor tick marks visible. A check mark appears in the check box.
If you want to make the points invisible, clear Minor tick marks visible.
6 Click Apply.
If you selected Minor tick marks visible, the tick marks along the X and Y axes in the graph appear.
If you cleared Minor tick marks visible, the tick marks disappear from the graph.
7 Do one of the following:

• Close the Modify Graph dialog box.
  
• Keep the Modify Graph dialog box open to continue modifying the graph.
  

To display or hide the gridlines on graphs
1 Open an image.
2 Delineate a VOI on the image.
3 Generate an intensity profile (refer to "Generating graphs"). Either the Contour VOI Graph window (Figure 10) or the Intensity Graph window (Figure 11) opens.
4 Select Views > Modify Graph Features in either Contour VOI Graph window or the Intensity Graph window. The Graph page of the Modify Graph dialog box (Figure 13) appears.
5 Do one of the following:

• To make the gridlines appear on the graph, select, if not already selected, Gridlines visible. A check mark appears in the check box.
  
• To make the gridlines disappear from the graph, clear Gridlines visible. The check box is empty.
  

Figure 14. Displaying or hiding the gridlines and tick marks on the graph

6 Click Apply.
If you selected Gridlines visible, horizontal and vertical gridlines appear in the graph.
If you cleared the check box, the gridlines disappear from the graph.
7 Do one of the following:

• Close the Modify Graph dialog box.
  
• Keep the Modify Graph dialog box open to continue modifying the graph.
  

To change the number of gridlines in graphs
1 Select Views > Modify Graph Features in either the Contour VOI Graph window (Figure 10) or the Intensity Graph window (Figure 11). The Graph page of the Modify Graph dialog box (Figure 13) appears.
2 Change the number of X -axis gridlines in Number of X -axis gridlines (Figure 15) by specifying a value from 1 to 50. The default number of gridlines is 4.
3 Change the number of Y -axis gridlines in Number of Y -axis gridlines (Figure 15) by specifying a value from 1 to 50. The default number of gridlines is 4.

Figure 15. Number of X -axis and Y -axis gridlines

4 Click Apply.
The number of horizontal and vertical gridlines that you specified appear in the graph in the Intensity Graph window.
Tip: If you specify many gridlines, to see the gridlines more clearly, resize the Modify Graph dialog box.
5 Do one of the following:

• Close the Modify Graph dialog box.
  
• Keep the Modify Graph dialog box open to continue modifying the graph.
  

To change the graph title and labels on the X and Y axes
1 Open an image.
2 Delineate a VOI on the image.
3 Generate an intensity profile (refer to "Generating graphs". Either the Contour VOI Graph window or the Intensity Graph window opens.
4 Select Views > Modify Graph Features in Contour VOI Graph window or the Intensity Graph window. The Graph page of the Modify Graph dialog box appears.
5 Type the new title and axes labels in Title, X-axis label, and Y -axis label boxes (Figure 16).

Figure 16. Title, X -axis label, and Y -axis label boxes in the Modify Graph dialog box

6 Click Apply.
The new title appears number of horizontal and vertical gridlines that you specified now appear in the graph (Figure 17).
Tip: If you specify many gridlines, you might want to resize the Modify Graph dialog box to see the gridlines more clearly.
7 Do one of the following:

• Close the Modify Graph dialog box.
  
• Keep the Modify Graph dialog box open to continue modifying the graph.
  

Figure 17. Changed title and axes labels in the Intensity Graph window

To change the background color of graphs
1 Open an image.
2 Delineate a VOI on the image.
3 Generate an intensity profile (refer to "Generating graphs"). Either the Contour VOI Graph window or the Intensity Graph window opens.
4 Select Views > Modify Graph Features in either the Contour VOI Graph window or the Intensity Graph window. The Graph page of the Modify Graph dialog box (Figure 13) appears.
5 Select Change background color.

Figure 18. Change background color button

The Pick Background Color dialog box (Figure 19) opens.

Figure 19. Pick Background Color dialog box

6 Select a color from one of the three pages in this dialog box. Refer to "To change background and border colors" for information on how to select a color. Refer to "To change background and border colors" for information on how to select a color.
7 Click OK to apply the color to the graph background. The Pick Background Color dialog box closes, and the graph background (Figure 20) changes to the color you selected.

Figure 20. Changed background color for the graph

To reset graphs to their original background colors To return either the intensity graph or the contour VOI graph back to its default colors, select Views > Reset Graph to Original or press Ctrl Z in either the Contour VOI Graph window or Intensity Graph window as appropriate.

Changing the legends for functions