Mitsubishi P91W Instruction Manual download pdf (Page 99)

Analysis Toolbox Tools

Relative quantities are displayed in the Relative Quantity column in the

analysis table (Volume Table tab). The relative quantity is the ratio of the

background-adjusted volume divided by the background-adjusted reference

volume.

All other volumes now display numerical values relative to your reference

volume. Values above 1.0 indicate that the volume is greater than the

reference volume. Values below 1.0 indicate the volume is less than the

reference volume.

ABSOLUTE VOLUME QUANTITY

Note: Absolute volume quantity analysis is not available for

multichannel images.

If you have drawn your volume around an object of known quantity, you can

use it to calculate the quantity of your unknown volumes. The quantities of

your unknown volumes are calculated based on the standard volumes and the

selected regression method.

To classify a particular volume as a standard:

1. Double-click the volume. This opens the Volume Properties dialog box.

2. Select the Standard option button and enter the quantity in the Quantity

box.

3. Click OK to close the dialog box.

Standard volumes will have the default names S1, S2, and so on, based on

the sequence of their creation.

To review the regression curve:

• Open the Standard Curve window and select the Volume Standard

Curve tab

REGRESSION METHODS

Three regression methods are available to generate the volume quantitation

curve used for absolute quantity: linear, point-to-point, and cubic spline. To

display the standard curve, click the Standard Curve button in the toolbar and

select the Volume Standard Curve tab in the Standard Curve dialog box. See

Appendix E. Regression Calculation Methods to learn how each of these

methods is calculated.

The data for volume standards are found in the Absolute Quantity column of

the Volume Table.

Note: Selecting the Force Through Origin checkbox always starts

the standard curve graph at 0,0, regardless of the best curve fit.

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Mitsubishi P91W Instruction Manual Page 99