Whatever we scan (i.e. head, knee or hand etc.) needs to be at the center of the tube. So, if we are scanning your brain, your head will be in the centre, but probably (depending on your height) a good portion of your body will be out of the magnet.
http://sunnybrook.ca/content/?page=img-mri-faqs
A knee MRI uses magnets and radio waves to capture images inside your body. Unlike X-rays and CT scans, an MRI does not use radiation. The MRI procedure typically takes between 30 minutes to an hour.
http://www.healthline.com/health/knee-mri-scan
Magnetic resonance imaging (MRI) of the knee is done to: 1  Check for the cause of unexplained knee pain or the knee giving out for no reason. 2  Find problems in the knee joint , such as arthritis, bone tumors, or infection, or damaged cartilage, meniscus , ligaments, or tendons. 3  Find out if a knee arthroscopy is needed.
http://www.webmd.com/pain-management/knee-pain/magnetic-resonance-imaging-mri-of-the-knee
Highlights. 1  A knee MRI uses magnets and radio waves to capture images inside your body. 2  Unlike X-rays and CT scans, an MRI does not use radiation. 3  The MRI procedure typically takes between 30 minutes to an hour. 1  An MRI test uses magnets and radio waves to capture images inside your body without making a surgical incision. It can be performed on any part of your body, but a knee MRI looks specifically at your knee and its surrounding areas.
http://www.healthline.com/health/knee-mri-scan
Magnetic resonance imaging (MRI) is a test done with a large machine that uses a magnetic field and pulses of radio wave energy to make pictures of the knee . The radiologist may discuss preliminary results of the MRI with you right after the test. Complete results are usually available for your doctor in 1 to 2 days.
http://www.webmd.com/pain-management/knee-pain/magnetic-resonance-imaging-mri-of-the-knee
Magnetic resonance imaging (MRI) of the knee is done to: Check for the cause of unexplained knee pain or the knee giving out for no reason. Find problems in the knee joint , such as arthritis, bone tumors, or infection, or damaged cartilage, meniscus , ligaments, or tendons.
http://www.webmd.com/pain-management/knee-pain/magnetic-resonance-imaging-mri-of-the-knee
How long does the MRI scan take? For most exams, expect to be in the department for a minimum of one hour. We need time to prepare you for your scan, and then take you into the room for the actual exam. For most body cases (exams like liver, pelvis, heart) expect to be in the department for two hours.
http://sunnybrook.ca/content/?page=img-mri-faqs
In brief: MRI scan length. The MRI can take between 20 minutes and 1 hour, depending on the body part. It can take longer if there is any motion, so try to stay still. Leave time for filling out paper work and getting dressed for the scan as well. The MRI can take between 20 minutes and 1 hour, depending on the body part.
https://www.healthtap.com/user_questions/1341840-how-much-time-does-and-mri-scan-take
During the MRI itself, the machine tends to generate very loud noises, and patients are often issued with headphones. Many hospitals provide patients with music to listen to so that they can relax. The knee MRI can take 30 minutes to an hour. It is important to stay still during this period. Patients who know that they will have trouble lying down may ask if they can take a sedative or a drug for pain management.
http://www.wisegeekhealth.com/what-should-i-expect-from-a-knee-mri.htm
Rating Newest Oldest. Best Answer: A MRI of the knee will take anywhere from 30-60 minutes, depending on the machine used and how many imaging sequences are done. You will need to call the imaging facility, where you are having your MRI. They will tell you how long it takes to do this scan at their facility.
https://answers.yahoo.com/question/index?qid=20080815073859AAivr01
how long does a mri of the knee take
The magnetic resonance imaging of the knee takes 30 to 60 minutes, depending on the machine used and how many imaging sequences are done. A  Mri of the knee take is 30-60 minutes long.