To reduce or avoid ocular lens exposure, the scan angle should be parallel to a line created by the
supraorbital ridge and the inner table of the posterior margin of the foramen magnum. This may be
accomplished by either tilting the patient’s chin toward the chest (“tucked” position) or tilting the gantry.
While there may be some situations where this is not possible due to scanner or patient positioning
limitations, it is considered good practice to perform one or both of these maneuvers whenever possible.