Signal To Noise Check-Surface Coils

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	-	-	-

Table 2. Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
Phantom for SNR Check, Refer to manual shipped with each Surface Coil	1	-	-	-

Table 3. Safety

Warning

POISON HAZARD!

THE PHANTOM CONTAINS NICKEL CHLORIDE, A SUSPECTED CARCINOGEN

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

Table 4. Required conditions
Condition	Reference	Effectivity
No image artifacts	-	-
System Gain Calibration complete	-	-

At the operator workspace, select the scan icon in the desktop control panel.
If necessary, exit out of any previous exams by selecting End Exam.
Click on New Pt and enter the following:
1. Id: geservice
2. Name: snr check
3. Weight (lb.): 111
  
  Note: Possible equipment damage. Completely remove the Quad Head Coil from the cradle before performing any body scans. Failure to do so may damage the Head Coil T/R Network.
Remove the Quad Head Coil (if present) from the cradle.
Place the surface coil to be tested on the table.
Connect the coil connector to its mating connector in the Carriage Assembly.
Setup Coil and phantom by referring to manual shipped with Surface Coil.
LANDMARK, and MOVE TO SCAN. by referring to manual shipped with Surface Coil.
At the operator workspace, prepare the system for an SNR Check (Surface Coils) scan using the scan protocol shown in the "Service Protocols" procedure located on the service methods CD-ROM.
Click on Autoview, just below the Autoview image display screen, to automatically display your images.
Click on Save Series, then Prepare to Scan.
Click on Auto Prescan to properly calibrate the RF power level for the 90-degree and 180-degree pulses.
Click on Scan. Record the Exam number and Series number for SNR Calculations. After the first scan is complete, click on Scan again (two back-to-back scans).
For analysis, see Section Image Analysis.
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No finalization steps.