• Object ID: 00000018WIA3083EE20GYZ
  • Topic ID: id_13105890 Version: 3.4
  • Date: Apr 23, 2020 7:31:49 PM

GEM MCQA Setup - Posterior Array (PA) upper

Prerequisites

Table 1. Personnel requirements
Required personsPreliminary requirementsProcedureFinalization
1-30 minutes-

The 1.5T GEM Coil MCQA will use the 1.5T phantoms, which are green in color.

Note:

Coils do not ship with phantoms. Phantoms come in a Unified Phantom set with the MR System.

Table 2. Tools and test equipment
ItemQuantityEffectivityPart numberManufacturer
TL Unified Phantom (for 1.5T)2-

5343347

-
PA Phantom Positioner (for both 1.5T and 3.0T)1-

5405748

-

Procedure

  1. Place the flat filler panel on the GEM table in the recess closest to the magnet bore.
    Figure 1. Flat filler panel
    1Flat filler panel
    2Bore
  2. Landmark at the straight edge of the flat filler panel.
    Figure 2. Landmark location
    1Landmark/bottom edge of the flat filler panel
    2Bore
  3. From Landmark 0 mm (at the bottom edge of the flat filler panel), move the table from bore until the system LCD displays s 50 mm.
    Figure 3. Phantom position
    1Bore
    2s 50 mm
    350mm overlap
    4Landmark 0 mm
  4. Place two TL unified phantoms on the GEM table centered in the right to left direction and the front edge of the phantom closest to the bore aligned with the s 50 mm laser mark.
    Important: Make sure that the front end of the first phantom (closest to the bore) overlaps the bottom edge of the flat filler panel 50mm. A slight misalignment of the phantoms and landmark may cause a false negative result from MCQA.
  5. Important: Do not change the landmark.
    Press Advance to Scan.
  6. Run the MCQA Tool. Make sure that the correct coil is selected in the Current Coil field:
    • For the original PA coil: 1.5T_GEM_PA1
    • For the latest PA coil: 1.5T_GEM_PA_1 (note the extra underscore between "PA" and the number)
    Figure 4. MCQA Tool Menu