In preparation for the scan, the chair / bed needs to be moved to suitable height so that the participant can get on to it with ease.
A control pad adjusts the height of the bed. To raise the bed press either "up" () buttons must be pressed. Press both to increase speed. To lower the bed press either "down" () button.
For a seated experiment start with the bed at ground level.
For a supine experiment start with the bed at a height roughly equivalent to the height of the dewar helmet. Leave the step-stool by the bed, so that the participant may use it to help them get onto the bed.
The height fo the bed will need to be adjusted when a participant is in the scanner. Remember to inform the participant before changing the height of the bed, and make sure that their head is in a safe position before starting to move the chair / bed.