SIGNA MR355 / SIGNA MR360
Service Manual
5856356-3EN Revision 5.0
Basic Service Documentation. Copyright General Electric Company.
Object ID: 00000018WIA303E6E20GYZ
Topic ID: id_13106959 Version: 3.0
Date: Aug 29, 2019 1:36:00 AM

First Image

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	Not Applicable	15 minutes	Not Applicable

Table 2. Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
DQA Phantom	1	-	2131027-2	-

Table 3. Safety

Warning

POISON HAZARD!

1.5T and 1.0T PHANTOMs CONTAINS NICKEL, A SUSPECT CARCINOGEN.

DO NOT INGEST. DISPOSE OF AS A HAZARDOUS WASTE ACCORDING TO STATE AND FEDERAL REGULATIONS.

Warning

Poison Hazard!

3.0T phantoms contain dimethyl Silicone Fluid. Do Not ingest.

If Lead or spill occurs, wipe up or absorb in inert material and place in a container for disposal. Incineration or landfill is the recommended disposal method.

Table 4. Required conditions
Condition	Reference	Effectivity
Signa software fully operational	-	-
Magnet mechanically shimmed	-	-

About this task

Procedure for obtaining the first image after the system installation.


Last Update	09/28/2004

Procedure

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
Landmark at the landmark lines of the phantom.
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.

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.

Table 5. FIRST IMAGE PROTOCOL
Note: This is the alternate proprietary procedure available for GE use, and to sites with a valid Advanced Service Package Limited License. (If you have not already done so:) Click on New Pt, and Enter Patient Id: `geservice`Enter Patient Name: `first image`Enter Weight (Lb): `111`Enter Set Patient Protocols to Service. 2. In the Protocol field, type `o.20.1` (o=Other, 1=series number), or select the corresponding “first image” protocol from the Service list. 3. For TwinSpeed, select GradMode=WHOLE Save Series, then Download.

Select Scan (system Auto Prescans first).
For TwinSpeed, repeat Step 4 and Step 5 with GradMode=ZOOM.
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.