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### Magnifying a region of interest (ROI)

You can use the Magnifying Glass, to magnify a small area of an image. As a result, the region of interest (ROI) can be reviewed in detail. Typically, the Magnifying Glass is used for CR studies.

In addition, you can:

| • | Adjust the size of the Magnifying Glass and the zoom multiplier value

Note: The magnification factor of the Magnifying Glass is obtained by applying the zoom multiplier value to the image zoom ratio. For example, if the glass zoom multiplier value is 2, and the image zoom ratio is 75%, the Magnifying Glass shows the ROI at 150% of its original size. For details on image zoom ratio, see Zooming and panning images.

| • | Apply one of the following Window/Level values to the ROI:

| - | Window/Level specified for the image

| - | Window/Level estimated for the ROI (see Estimate Window/Level)

| • | Apply post processing to the ROI (see About post processing)

Restrictions for magnifying a ROI

The following restrictions exist:

| • | The Magnifying Glass cannot be used when the images are in Cine mode. For details on the series display modes, see Selecting the series display mode.

| • | The post processing option of the Magnifying Glass is not available for mammography diagnosis.

| • | Annotations on the magnified image are not displayed.

Steps for this task

To magnify a ROI:

| 1. | Click the image.

| 2. | Click the Glass icon on the main toolbar.

The Magnifying Glass is placed on the center of the image.

In addition, the Magnifying Glass dialog box is displayed.

| 3. | Optionally, adjust the Magnifying Glass properties:

To... | Do this...
Adjust the size of the Magnifying Glass |
| • | Drag the edge of the Magnifying Glass, then release the mouse button.
Note: Changing the size of the Magnifying Glass enables you to adjust the size of the ROI. It does not relocate the center point of the Magnifying Glass, or change the zoom multiplier value.
Adjust the glass zoom multiplier value |
| • | Drag the slider under the Magnifying Glass, in the appropriate direction:
| - | To increase the zoom multiplier value, drag the slider to the right
| - | To decrease the zoom multiplier value, drag the slider to the left
Note: Changing the zoom multiplier value does not relocate the center point of the Magnifying Glass.

| 4. | In the Magnifying Glass dialog box , specify the Window/Level to apply to the ROI:

To... | Do this...
Apply the Estimate Window/Level |
| 1. | Select the Use W/L Estimation check box.
| 2. | To apply the Estimate Window/Level to all images in the series, click Apply to Series.
Apply the image Window/Level |
| • | Clear the Use W/L Estimation check box.

| 5. | In the dialog box , apply post processing to the ROI, or remove post processing from it:

To... | Do this...
Apply post processing to the ROI |
| 1. | Click the Method box, and select Sharp-Smooth.
| 2. | Sharpen or smoothen the ROI as follows:
| - | To sharpen the ROI, drag the slider to the left.
| - | To smoothen the ROI, drag the slider to the right.
Remove post processing from the ROI |
| • | Click the Method box, and select None.

| 6. | Drag the Magnifying Glass around, to review the ROI. To magnify a ROI on another image, drag the Magnifying Glass to that image.

| 7. | Click Close.

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