• Topic ID: id_11038691
  • Version: 4.0
  • Date: Sep 13, 2021 2:13:39 AM

Center Phantom

Prerequisites

Overview

This document provides the necessary steps to center the Quality Assurance Phantom in the scan plane.

Procedure

  1. Move table to longitudinal home position.
  2. Attach phantom holder to gantry end of cradle.
  3. Mount phantom to phantom holder.
  4. Place bubble level on top of phantom, positioned along Z-axis. Adjust phantom holder back knob until phantom is level front to back.

    Figure 1. Phantom Back Adjustment Knob

  5. Turn on laser alignment lights.
  6. Move cradle into gantry until axial external alignment light is aligned with phantom's axial reference mark.
  7. Adjust phantom holder side knob until sagittal external alignment light is aligned with phantom’s sagittal reference mark.
  8. Elevate table until coronal external alignment light is aligned with phantom’s coronal reference mark.
  9. Click SCANNER UTILITIES.
  10. Click CENTER PHANTOM.
  11. Click CONFIRM.
  12. Press START on GSCB when it flashes.
  13. Adjust phantom position if results are out of specification range.
    note:

    Phantom center specification is ± 1.0mm.

  14. Repeat steps 11 – 13 until the phantom is centered.
  15. Click DONE in Phantom Centering window.
  16. Click QUIT in Scanner Utilities window.

Finalization

No finalization steps.