What to expect from your MEG scanMagnetoencephalography (MEG) uses no radiation, requires no injections, makes no noise and is completely safe for the subject. Most subjects find the scan to be a relaxing experience. Your experienced technician will guide you through the whole process.
What is a MEG scan?
Magnetoencephalography (MEG) is a completely non-invasive scan which records the tiny changes in magnetic fields generated by brain function. Because the scanner is so sensitive it is contained in a special room which excludes the electromagnetic fields of our everyday environment.
MEG uses no radiation, requires no injections, makes no noise and is completely safe for the subject. Most subjects find the scan to be a relaxing experience. Your experienced technician will guide you through the whole process.
Do I need to prepare for my scan?
Before having your MEG scan you may be asked to change into a gown to ensure that there are no metallic objects or materials in your clothing. You will complete a questionnaire to ensure that you have no contra-indications to having a scan. The technician will ask about any medication you are on and check for certain implanted bio-mechanical or electrical devices which could affect the scan.
Will anything be attached to my head?
Usually 5 small coils will be taped to your forehead for the duration of the scan. These coils allow the MEG system to record the position of your head in the scanner during the scan. The operator will register the position of these coils using a special pen called a stylus. The operator may also use this pen to trace the shape of your head to improve the accuracy of subsequent data analysis.
Where will I be for the scan?
The scan itself will be performed with you seated in special chair or lying down on the system bed inside the shielded room. Your head will be placed into the fixed scanner helmet, and soft pads may be used to make you more comfortable and to help keep you still during the scan.
What actually happens during the scan?
During the scan you will usually be in the scan room by yourself. The whole thing will usually last between 30-40 minutes, and you can ask for breaks if you need to. There is a microphone system which will allow you to talk to the operator and you will be provided with a buzzer to alert the operator if you want or need to stop the scan urgently. Children or vulnerable adults can have someone inside the shielded room with them during the scan if necessary. The operator will tell you when the scan begins but you won’t hear any noise when it starts or ends. Just sit back and relax!