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Functional Checks
System
Checking and adjusting the patient intercom functionality
GOC Audio Assembly (GOCAA) controls are adjusted at factory for best sound quality. This document describes how to check and confirm volume and quality of sound heard from speaker in the magnet bore and from speaker at the Scan Control and Intercom Module (SCIM). Directions for sound adjustments are also provided if needed.

Functional Checks
- Functional Checks
- System
  - Doing a compressor pressure check
    Do a check of the cryocooler compressor supply pressure.
  - Checking the RF screen room door
    Make sure the RF screen room door is functioning correctly.
  - B0 Drift Functional Check
  - Doing a check scan
    A check scan is done at the conclusion of many procedures. This functional check assures the unit is in good clinical working order.
  - Emergency Stop (E-Stop) planned maintenance
  - Emergency Off (E-Off) planned maintenance
  - fMRI QA Tool
  - HEC Hose Inspection, Coolant Fill, and Coolant Leak Check
  - Finalizing the HEC hose inspection, coolant fill, and coolant leak check
  - Identifying the Image Compute Node (ICN)
  - MDP power and ground and battery replacement label check
    MDP power and ground connections must be tight in order to avoid system failures.
  - Magnet Rundown Unit (MRU) Functional Check
  - Doing an MRU yearly service check (MRU, ERU, or EDU PM testing matrix)
    The model number is listed on the side of the MRU, ERU, or EDU. Refer to the appropriate vendor manual available from the online documentation library for applicable testing procedures.
  - Peripheral Pulse Probe Check
  - Spike Noise Check
  - System Level Correlated Noise Check
  - Checking the oxygen monitor
    References to various Oxygen Monitor Subsystem Manuals.
  - Checking and adjusting the patient intercom functionality
    GOC Audio Assembly (GOCAA) controls are adjusted at factory for best sound quality. This document describes how to check and confirm volume and quality of sound heard from speaker in the magnet bore and from speaker at the Scan Control and Intercom Module (SCIM). Directions for sound adjustments are also provided if needed.
    - Checking the patient microphone
    - Checking the patient speaker
    - Adjusting the intercom for the GOC audio assembly
      Adjust the minimum and maximum volume of the keyboard speaker (patient’s voice) and the maximum volume of the patient speaker (operator's voice).
  - Checking the gradient and system PDU power and ground connection
    PDU power and ground connections need to be tight in order to avoid system failures.
- Radio Frequency (RF)
- Coils
- Magnet Enclosure
- Patient Table
- Patient/PAC
- Grounding and Leakage Current

Optima MR450w BASE 1.5T System Service Methods
5690012-2EN Revision 3
Object ID: 00000018WIA3090C630GYZ
Topic ID: id_2011596 Version: 6.0
Date: Feb 21, 2021 9:11:50 PM

Checking and adjusting the patient intercom functionality

Prerequisites


Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	-	5 minutes	-


Safety
Before working in any GE Healthcare MR suite or performing any GE Healthcare service procedure, you must: Have read and understood all hazard conditions and safety requirements in the latest revision of the GE Healthcare MR Service Safety Manual (5452735). Have successfully completed all relevant GE Healthcare Environmental Health and Safety (EHS) courses (or for non-GE employees, equivalent workplace training courses). Comply with all site-specific training and workplace safety requirements. If you have any safety concerns at any time, do not begin work or immediately stop work and move to a safe location. Immediately contact your supervisor or site safety officer for instructions on how to proceed.

About this task

Adjustment of GOCAA should only be necessary if:

Field Engineer or customer determines that adjustment is required after performing checks or usage.
GOCAA factory ideal settings are lost as a result of a past adjustment on the site.

Two types of speaker volume settings can be adjusted during checks:

Operator Volume - Controls the speaker volume in the bore (Operator’s voice).
Patient Volume - Controls the volume of the speaker from the Scan Control and Intercom Module (SCIM)/keyboard (Patient’s voice)

Perform all available checks for Operator Volume and Patient Volume before making any adjustments.

Figure 1. Volume on SCIM

Procedure

Advance the cradle from the Home location 500 mm onto the bridge.
Press Landmark, then Advance to Scan to position the cradle in the bore.

Home
Functional Checks
System
Checking and adjusting the patient intercom functionality
GOC Audio Assembly (GOCAA) controls are adjusted at factory for best sound quality. This document describes how to check and confirm volume and quality of sound heard from speaker in the magnet bore and from speaker at the Scan Control and Intercom Module (SCIM). Directions for sound adjustments are also provided if needed.