Perform substance combination by putting each possible overlap areas from the images into a different range. Only the entered slice ranges for each image  will be included in the combination, all other values are ignored. All ranges are contained between 1 and 250.

Output

	Select Single Values to create image(s) where each substance is represented by a single, unique value.
	Select Range to create image(s) where each substance has a unique range of values.

Method

	Select Threshold Only to use the thresholds to determine the areas for each substance.
	Select Roi Only to use regions of interest to determine the areas for each substance.  The regions of interest should be saved for each image with "voi" for and extension.
	Select Threshold under Roi to use thresholds under each region of interest to determine the areas for each substance. The regions of interest should be saved for each image with "voi" for an extension.

Slice Ranges

	Enter a value for the lower value of the slice range for the first image in Low (Image 1).
	Enter a value for the upper value of the slice range for the first image in High (Image 1). . . .
	Enter a value for the lower value of the slice range for the nth image in Low (Image n).
	Enter a value for the upper value of the slice range for the nth image in High (Image n).

Note

Theses are used only when Threshold Only or Threshold under Roi are selected.

Defaults

Low = 0.25, High = 1.75.

Include

Use this option to select which tissues to use and which to combine into an "other" category.  If selected, the tissue will be used, otherwise, the tissue will be put in the other category.  All tissues that are not included are treated as a single tissue, called "other."

Substance Reassignments

	S1: 1: Assignment of the first substance (overlap area) to a possibly different substance.  The 1 indicates the area where the first image overlaps no other image.
	S2: 1,2: Assignment of the second substance (overlap area) to a possibly different substance.  The 1,2 indicates the area where image 1 overlaps image 2. . . .
	Sm: n: Assignment of the last substance (overlap area) to a possibly different substance.  The n indicates the area where n, the last image, overlaps no other image.

Note

By default all overlap areas are not reassigned. Those that the user reassigns will be mapped into the alternate overlap area, which will reduce the number of substance overlaps in the final image.  This option permits more values for each remaining substance.

Volume

Press Volume to calculate the volume of the substances, using optional regions of interest to define the area to calculate the volume over.

Select Calculate Length to calculate the longest dimension of each overlap region.

Repeat

Press Repeat to perform substance on other images.  The images will be put in the correct order after processing has completed.

Note

Previous results of repeat processing need to be deleted manually for images saved in Dicom format.

Cancel

Press Cancel to remove the Substance dialog.

Help

Press Help to display help for the Substance dialog.