An ERMF can be applied to images in XA, RF, DX, or MG studies. ERMF calibrates images to compensate for the effects of projection onto film. If appropriate, you can use the Customize dialog to apply ERMF by default to all studies from a particular modality.
 | CAUTION! The DICOMheader of an image may already contain pixel spacing values that account for the estimated radiographic magnification factor. In this case, you should not enable ERMF. To find out whether the pixel spacing from a particular modality includes ERMF, read the modality conformance statement. |
To set ERMF calibration preferences
If setting preferences for other users, impersonate the user or role.
Press F12 or, from the Image area top toolbar, click Customize.
In the Customize dialog, switch to the Modality Preferences tab.
From the Modality list, select XA, RF, DX, or MG.
If the list is available, select a Body Part.
To apply ERMF to all body parts for this modality, select DEFAULT as the Body Part.
To apply ERMF by default to all images from this modality (and body part, if selected), under Calibration, select the Apply Estimated Radiographic Magnification Factor checkbox.
Read the warning message and click OK.
To save the changes and close the Customize dialog, click OK.
ERMF calibration is now applied by default to studies of the selected modality. To change calibration source for a specific study, use the User Image Calibration tool.
Required permissions
General: Image Area Tools > Customize operation
Study-based: Image Area Tools > Save User Image Calibration operation