4.11. Other Final Checks

4.11.1. O2 Monitoring

The O2 Monitor is clear tube on the right of the door as you enter the MSR. Make sure that the tube is up against the ceiling.

4.11.2. Check Head Coils

Check the head coils for cracks in their coating, protruding wires etc. The head coils will be hanging from the Head Coil Box on the nearside of the MEG dewar, see (Figure 4.17). If a coil is broken, it should be replaced with a new one, which may be found in the grey cabinet labelled “1”.

Figure 4.17. Head Coil Interface Box.

Head Coil Interface Box.

4.11.3. Check Velcro on Dewar Arm

Check the velcro that attaches the cable from the RC cage to the Head Coil Box is securely fastened to the dewar arm. The cable should be housed in the velcro sheath, and the velcro sheath should be attached to the velcro strip on the dewar arm. It is vitally important you check that this is in place. If the cable is hanging lose, it may become taught underneath the dewar arm when you move the dewar RC cage, and tilt the dewar. If this happens whilst there is a participant in the scanner, there is a very real danger that you may cause the participant an neck injury.

4.11.4. Set Up Visual Screen If Approriate

If you are operating a visual study you will need to set up the appropriate screen for the respective study.

  1. For seated presentations, you need to hang the material screen up. This screen is attached by two black clips that are on the metal runners, either side of the MEG suite. The only caveat to this is when you are using the eye-tracker, where you'll need to have the mirrored screen. If using the mirrored screen, move this into a convenient position, but do not move it to where the participant will be until the participant is in place.

  2. For supine presentations, you need to use the mirrored screen which projects the image above the participant. Move this into a convenient position, but do not move it to where the participant will be until the participant is in place.

4.11.5. Check Auditory Etymotics

Check that the connections on the etymotics are secure, and get some ear tips ready for the participant. The ear tips are in the Auditory drawer of the chest of drawers that back on to the MSR.