There may be several sequences and the technologists will explain this to you over the intercom. The technologist can see you clearly throughout the scan. Be sure to tell the technologist if you are feeling anxious. There are many ways they can help you feel more comfortable and relaxed during your procedure. During the scan, you will hear a knocking or a thumping sound as the machine operates.
Some scans are louder than others.
Ask the technologist to adjust the volume of the earphone if needed. You will need to lie very still during the scanning procedure. Movement causes the images to blur, in which case the whole sequence may have to be repeated. The technologist will explain to you ahead of time and throughout the scan when it is ok to move and when it is necessary to hold still. The average scan time, once your are positioned on the table, is approximately 30 minutes.