An MRI (magnetic resonance imaging) scan is a type of medical imaging that uses a magnetic field and radio waves to generate pictures of structures inside the body, like bones, organs, and soft tissues. There are two main types of MRI systems: open MRI and closed MRI.

An open MRI machine has magnets on both the top and bottom of the machine and is designed with a wider opening, which makes it more comfortable and easier to tolerate than traditional closed machines. Open MRIs have a clear view of the scan area, making them ideal for certain types of scans, such as brain scans. They are also more spacious and less confining, which decreases the risk of claustrophobia and panic attacks in patients. Open MRI machines are suitable for patients who are claustrophobic, overweight, or obese.

However, open MRI machines use a lower magnetic field strength than closed MRI machines, which can result in lower quality images and an inability to diagnose certain problems. Open MRI machines are also unable to take images of certain areas of the body.

In contrast, a closed MRI machine has a ring of magnets that forms an open hole or tube in the middle where the patient lies to get the images. Closed-bore MRI machines are narrow with tight head-to-ceiling space, which can cause anxiety and discomfort for some people, but these MRI machines take the best quality images.

In summary, an open MRI is a type of MRI machine that is more spacious and less confining than a traditional closed MRI machine. It is suitable for patients who are claustrophobic, overweight, or obese. However, open MRI machines use a lower magnetic field strength than closed MRI machines, which can result in lower quality images and an inability to diagnose certain problems.