2.23 SUV Measurement

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Functionality is available in the Pro edition
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SUV (Standardized Uptake Value) is a value reflecting the intensity of contrast accumulation in tissues. To measure the SUV:

  1. Open a series suitable for SUV measuring.

  2. Select the Image main menu, select the SUV item and the Show SUV command. If the selected series is not suitable for SUV measuring, then the Show SUV command is disabled. If SUV measuring is already activated, then the Show SUV command is marked with a flag.

  3. If necessary, change the CLUT to [WL]PET by selecting it from the drop-down list or by pressing the Shift+F8 key combination on the keyboard. For details, see Section 2.22.1.

  4. If the data contained in the study is insufficient, then the dialog shown in Fig. 2.76 appears. Specify the following data:


    PIC

    Figure 2.76: SUV Settings


  5. To change the SUV calculation settings, select the Image main menu, select the SUV item and the Settings... item.

  6. When the SUV measurement is activated, the value at the point where the cursor is located appears in the top left-hand corner of the window. For example: SUVlbm: -0.092 g/ml. Move the cursor over the image to measure the SUV. Please note that the Display information PIC button must be pressed (see Section 2.26).

  7. To calculate the SUV in a particular area or point, use the ROI tools (see Section 2.19.6). Please note that the Use SUV for ROI box must be checked in the SUV settings.

If the time and the date of the series creation is greater than the time and the date of the study, then the message Warning: This series may be post-processed in which date of series creation unrelated to acquisition appears in the SUV Settings dialog.

To disable the SUV measurement, select the SUV on the main menu Image and select the Show SUV command. The density information will be displayed for the built ROIs.