how long does an mri on your head take
Best Answer: I have had a few head MRIs and they usually take between 10 and 30 minutes, but you have to be very still, the slightest movement and you will have to start all over.ating Newest Oldest. Best Answer: I have had a few head MRIs and they usually take between 10 and 30 minutes, but you have to be very still, the slightest movement and you will have to start all over. If you are nervous or scared they can administer a sedative to help you relax.