First Image

Prerequisites

Procedure for obtaining the first image after the system installation.

Procedure

  1. Place the DQA phantom in the head coil. Positioning the fill plugs up and toward the rear of the magnet. See Figure 1.

    Figure 1. DQA PHANTOM POSITIONING

  2. Landmark at the landmark lines of the phantom.
  3. At the keypad on the front of the magnet enclosure, press LANDMARK and MOVE TO SCAN.
    note:

    Exact location of isocenter will be found in a later procedure. The DQA should now be approximately centered longitudinally in body coil assembly. A good first estimate is about 32 inches behind front edge of body coil assembly.

  4. At the operator work space, prepare the system for a “First Image” scan using the scan protocol shown in the Service Protocols procedure located on the service methods CD-ROM, or for the alternate proprietary procedure, see Table 5.
  5. Select Scan (system Auto Prescans first).
  6. For TwinSpeed, repeat Step 4 and Step 5 with GradMode=ZOOM.
  7. DISPLAY IMAGE

    Verify that the images on the monitor correspond with Figure 2. Do not be concerned with image quality at this time; it will be addressed during the Performance Checks.

    Figure 2. DQA PHANTOM GEOMETRY FOR "FIRST IMAGE"

Finalization

No finalization steps.