Wednesday, September 8, 2010

What is An MRI Scan?

MRI Scan

An MRI scan is a safe and painless test that can provide detailed pictures of organs and other structures inside your body.


What is an MRI scan?

MRI stands for magnetic resonance imaging. An MRI scan uses a strong magnetic field and radio waves to create pictures, on a computer, of tissues, organs and other structures inside your body.

How does an MRI scan work?

Your body contains millions of hydrogen atoms. When you are in an MRI scanner:
  • A strong magnetic field aligns particles called protons which are within the hydrogen atoms. All the protons line up in parallel to the magnetic field, like tiny magnets. (Normally the millions of protons all lie in random directions.)
  • Then, short bursts of radio waves are sent from the scanner into your body. The radio waves knock the protons from their position.
  • When the burst of radio waves stops, the protons realign back into place. As they do so they emit radio signals. The protons in different tissues of the body realign at different speeds. Therefore, the signal emitted from different body tissues varies. So, for example, softer tissues can be distinguished from harder tissues on the basis of the signals sent.
  • These signals are detected by a receiving device in the scanner.
  • The receiving device transmits the signals to a computer. The computer creates a picture based on the radio signals emitted from the body.

What does an MRI scan involve?

The MRI scanner is like a tunnel about 1.5 meters long surrounded by a large circular magnet. You lie on a couch which then slides into the scanner. A 'receiving device', like an aerial, is placed behind, or around, the part of the body being examined. This detects the tiny radio signals emitted from your body. When each 'picture' is being taken you need to keep still for a few minutes, otherwise the scan picture may be blurred.

The scan itself is painless. The whole procedure can take 15-40 minutes. It may be a little uncomfortable lying still on the couch for this time. Small children may need a general anaesthetic to keep them still long enough for the pictures to be taken. In some cases, an injection of a special contrast dye is given into the bloodstream via a vein on the arm. This helps to give clearer pictures of certain tissues or organs being examined.

The radiographer sits in the control room next to the scanner and observes through the window. However, you can talk to them, usually via an intercom, and you will be observed at all times on a monitor.

The scanner is noisy so you will be given some headphones or earplugs to protect your ears from the noise. Quite often you can listen to the radio through the headphones or bring a CD to listen to.

What is an MRI scan used for?

An MRI scan can create clear pictures of most parts of the body. So, it is useful for all sorts of reasons where other tests (such as X-rays) do not give enough information required. It is commonly used to get detailed pictures of the brain and spinal cord, to detect abnormalities and tumours. Even torn ligaments around joints can be detected by an MRI scan. So, it is being used more and more following sports injuries.

What preparation do I need to do before an MRI scan?

Usually very little. Your local hospital should give you information about what is required before you come for the scan. The MRI scanner uses an extremely strong magnet, so people with certain types of medical implant cannot be scanned. This is because the magnet can potentially move medical devices with metal in them, or affect their function.


Therefore, before you enter the scanning area you should be asked if you have any medical devices in your body. (You may have to fill in a safety questionnaire that asks about things that may contain metal.) The following is not a definitive list but may help remind you of the type of things radiographers need to know about:
  • Internal (implanted) defibrillator or pacemaker.
  • Cochlear (ear) implant.
  • Surgical clips such as those used on brain aneurysms.
  • Artificial heart valves.
  • Implanted drug infusion ports.
  • Implanted electronic device, including a cardiac pacemaker.
  • Artificial limbs or metallic joints.
  • Implanted nerve stimulators.
  • Pins, screws, plates, stents or surgical staples.
It is also important to tell the radiographer if you have ever had any metal fragments lodged in your eyes or your body. In some cases you may need an X-ray before an MRI scan to make sure you are safe to enter the scanner.

Are there any possible complications

MRI scans are painless and safe. Unlike X-rays and some other imaging tests, an MRI scan does not use radiation. However:
  • Rarely, some people have reactions to the contrast dye which is sometimes used.
  • Pregnant women are usually advised not to have an MRI scan unless it is urgent. Although the scan is thought to be safe, the long-term effects of strong magnetic fields on a developing baby are not yet known.

What can I expect after the scan?

There are no after-effects from the scan. You can return to your normal activities as soon as the scan is over. The pictures from the scan are studied by an X-ray doctor (a radiologist) who sends a report to the doctor who requested the scan.

58 comments:

  1. It is amazing on MRI SCAN. What information is given. Can you give me cost and other details on MRI SCAN.

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  2. I think MRI SCAN is so costly for the middle person is it right can you guide me cheap and best way to save poor.

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  3. MRI SCAN for knee is a revolution in science I think it is best option for the patient who is effected.

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  4. Brain is softest part of the body and sensational one MRI SCAN proves the best probing the diseases.

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  5. Video media is more effective about MRI Scan if possible please give more about explanation about details.

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  6. Video media is more effective about MRI Scan if possible please give more about explanation about details.

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  7. Hi can you send me working details of MRI Scan?

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  8. How Brain MRI Scan is possible and what is cost and availability

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  9. What is CT scan and how it is different from MRI Scan?

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  10. It is good one on MRI Scan I like it thanks.

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  11. Is MRI Scan is safest or has it more side effects. I want details and clarification if you may provide.

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  12. I want MRI Brain Scan Pictures more if you can provide on my email raja@gmail.com

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  13. Please send me details of MRI SCAN MACHINE

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  14. What is An MRI Scan? Can you explain more please?

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  15. History of MRI SCAN I need if you provide.

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  16. Who invented MRI SCAN I want information if you can answer.

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  17. I am finding a suitable hospital for MRI SCAN in India can you help me ?

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  18. Can we do MRI SCAN all parts what we need and what is cost of whole body MRI SCAN?

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  19. Brain is softest part of the body and sensational one MRI SCAN proves the best probing the diseases.

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  20. The whole body scan is possible through MRI SCAN. I am agree with it.

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  21. MRI SCAN for knee is a revolution in science I think it is best option for the patient who is effected.

    ReplyDelete
  22. It is good one. What about MRI SCAN machine I need details for my project please help me.

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  23. I think MRI SCAN is so costly for the middle person is it right can you guide me cheap and best way to save poor.

    ReplyDelete
  24. It is amazing on MRI SCAN. What information is given. Can you give me cost and other details on MRI SCAN.

    ReplyDelete
  25. It is nice one on MRI SCAN. I like it

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  26. Can you explain more please? What is An MRI Scan?

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  27. I am seeking MRI Scan for Spine. This is nice.

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  28. I like it . It is good one on MRI SCAN.

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  29. It is awesome about MRI Scan I love it.

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  30. Thanks for such useful information about MRI Scan.

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  31. MRI Scan is a great technique to use in medical science.

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  32. I think MRI SCAN should not be so costly for the middle person is it right can you guide me cheap and best way to save poor.

    ReplyDelete
  33. It is astonishing on MRI SCAN. What information is given. Can you arrange me cost and other details on MRI SCAN.

    ReplyDelete
  34. Brain is prime part of the body and sensational one MRI SCAN proves the best probing the diseases.

    ReplyDelete
  35. I am searching a suitable hospital for MRI SCAN in India can you help me ?

    ReplyDelete
  36. What is the best use of MRI in body ailments scanning?

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  37. How can we protect and examine a human diseased body through MRI Scan.

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  38. What is MRI brain scanning and how it works please send details.

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  39. What is use of knee MRI I am finding a suitable treatment but doctors told me first MRI.

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  40. Can you define brain MRI properly so that I can arrange treatment for my brain?

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  41. What is best use of MRI scan while disease affects brain?

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  42. Should we go to MRI expert before treatment in wound on head?

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  43. Can MRI scan whole body properly?

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  44. Thanks for such good information on MRI Scan.

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  45. Send me details of MRI SCAN MACHINE.

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  46. How Brain MRI Scan is possible and what cost and accessibility of scan?

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  47. This is good one I am searching MRI Scan for Spine.

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  48. I like it. It is good one on MRI body SCAN.

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  49. Is whole body scan is easy through MRI SCAN.

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  50. Medical science is using all the ways to save a life like. MRI Scan

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  51. MRI SCAN knee is a surprising change. It is great data.

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  52. History

    The idea of creating MRI Scan Group began several years ago, when our parent company focused primarily on providing quality, custom-built MRI scanners for hospitals and imaging centers. While we were able to save these imaging centers thousands of dollars by creating scanners that fit their needs and budgets, we realized that the cost of scans for patients were still extremely high. We decided that if we can help imaging facilities, we can help patients. Since then we have dedicated our time and energy into becoming the most specialized, well-connected MRI scheduling service available.

    Mission & Values

    MRI Scan Group believes that healthcare should be affordable for everyone, and that charging upwards of fifteen-hundred dollars for an MRI scan is unacceptable. We believe that we can more efficiently connect supply with demand by giving patients easy access to affordable procedures. We strive to provide timely, custom, quality service to both patients and MRI facilities, and are dedicated to keeping standards in the health care industry high, and prices low. We also believe in innovation, new ideas, and an honest, strong work ethic. So if you have any suggestions, questions, or concerns, we want to hear from you.

    What we provide: A simple, safe, and cost effective connection to outpatient centers which perform quality MRI scans that meet industry standards. Our prices include not only the scan, but also the radiologist read, which is essential to making certain that you are diagnosed correctly. Our personable staff is trained to answer any and all questions you may have. So please, don’t hesitate to call or write us at info@mriscangroup.com This e-mail address is being protected from spambots. You need JavaScript enabled to view it . We will be happy to serve you.

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  53. MRI's are able to detect certain diseases much earlier than other medical imaging technologies, therefore often lowering diagnostic work-up and later late stage surgeries and procedures. This often saves money by preventing unnecessary invasive diagnostic and surgical procedures in patients where the procedures performed do very little to help diagnose the condition. This often makes the MRI the diagnostic tool of choice for many medical professionals and insurance companies.

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  54. Awesome picture on knee MRI Scan.

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  55. Superb information on MRI Scan.

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  56. I am seeking more details on MRI Scan machine if you can provide..

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  57. In an MRI machine a radio frequency transmitter is briefly turned on, producing an electromagnetic field. The photons of this field have just the right energy, known as the resonance frequency, to flip the spin of the aligned protons in the body.

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