7. Scanning: Experimental Procedures
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7. Scanning: Experimental Procedures

[Note]Before You Start

Know the study requirements in the Experimental Setup sheet. Experimental Setup sheets for each study can be found in the MEG study setup folder, near megmap. Once you are familiar with the study, ensure the following is done before starting:

  • Log into megmap.

    If you have problems doing this, see Chapter 6 (Software Acquisition Setup).

  • Set up the MSR accordingly; is the chair / bed prepared accordingly? Is there blue hygienic couch paper on the bed / chair and cushions?

    If there are any problems here, see Chapter 4 (MSR - Magnetically Shielded Room).

  • Set up the stimulus hardware.

    If you have problems doing this, see Chapter 5 (Stimulus Delivery and Equipment Setup).

  • Check the stimulus software; can you see triggers on the Real Time Display?

    If you have problems doing this, see Chapter 4 (MSR - Magnetically Shielded Room).

  • Check that the camera and intercom working properly?

    If you have problems doing this, see Chapter 4 (MSR - Magnetically Shielded Room).

  • Check that the O2 level is appropriate?

    If you have problems doing this, see Chapter 3 (Entry into MEG).

7.1. Participant Preparation

7.1.1. Briefing the participant

Firstly, verify that the participant has completed and understood the Full YNiC Consent forms.

Remember, you as the Operator have ultimate responsibility for ensuring that everything on the Full Consent form has been completed and is correct.

  1. Ensure the participant is aware of the closest fire exit from the MEG room.
  2. Make sure that the participant has removed all metallic items from their person. These include less obvious items e.g. belts, underwear, makeup and hair bands.
  3. Explain how to open the MEG room door from the inside. Be sure to cover both standard and emergency procedures. (see Chapter 4 MSR - Magnetically Shielded Room).
  4. Verify that the participant has not had an MRI within 3-4 days before the MEG scan, as there is a possibility of residual magnetization. This generates noise on the MEG scan. If they have had an MRI within 3-4 days, it is up to the Principle Investigator (PI) for the study whether you should procede or not. You as the operator are only responsible for identifying whether there has been a recent MRI, and informing the PI of this information.

7.1.2. Hygiene

Please remember to keep MEG as clean and tidy as possible and that a standard level of cleanliness must be maintained. Patients and participants should feel that they are entering a professional, clinical environment when they enter MEG.

7.1.2.1. Hand Cleaning

Antiseptic hand cleansing gel must be used before and after handling a participant.

7.1.2.2. Antiseptic Skin Wipes

Participants must wipe their foreheads and ears with the alcohol-free wipes before the coils are attached. Explain to the participant that the wipes will remove moisturiser, makeup and natural oils from the skin to aid coil attachment.

Figure 7.3. Acquisition Setup - Choosing a Scan

Acquisition Setup - Choosing a Scan

You are now ready to put the participant in the MSR.

You are now ready to start the experiment

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6.2. Setting up a New Scan Home 7.2. MEG Software Setup