6-7
Patient Positioning and Protocols
990400 Rev C 2010 May 1
Instruct Patients Prior to Exam
It is important to inform patients of what to expect during a scan so
that they are prepared and avoid movement during the scan.
Patients should be informed of the following:
• The turret rotates around the head during the scan.
• The exposure buzzer sounds for the duration of the rotation.
• The scan takes less than 10 seconds to complete.
Patients should be instructed to perform the following prior to or
during the exam:
• Remove all metal objects from the shoulders up, including
spectacles.
• Place hands in lap or hold on to the bottom of chair.
• Do not swallow during scan.
• Breath through nose during scan.
• Stay as still as possible until the turret has finished moving.
• Close eyes during scan.
• Keep teeth gently together and in same position
Previews and Dry Runs
NOTE: Preview scans and Dry Runs are described in detail in the
Acquisitioning chapter.
It is recommended that a Preview scan be performed to verify
Patient positioning. A Preview scan exposes the Patient to a fraction
of a second of radiation, but provides an image that can be used to
verify that the Patient is positioned to capture desired field of view
(FOV) during acquisition.
A Dry Run is recommended for Patients who want a demonstration
of the machine motion, and to check shoulder clearance. A Dry Run
simply rotates the turret in the exact manner that is required for the
selected protocol, but does not expose the Patient to any radiation.
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