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Topic: MRI


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  Howstuffworks "How MRI Works"
This event was the first MRI exam ever performed on a human being.
As late as 1982, there were but a handful of MRI scanners in the entire United States.
MRI is a very complicated technology not well understood by many.
www.howstuffworks.com /mri.htm   (249 words)

  
  Musculoskeletal MR
Because MRI can give such clear pictures of soft tissue structures near and around bones, it is usually the best choice for examination of the body's major joints, the spine for disk disease and soft tissues of the extremities.
MRI is a unique imaging method because, unlike the usual radiographs (x-rays), radioisotope studies or even CT, it does not rely on ionizing radiation.
MRI may not always distinguish between tumor tissue and edema fluid, and does not detect calcium when this is present within a tumor.
www.radiologyinfo.org /en/info.cfm?pg=muscmr   (1633 words)

  
 Cardiovascular Magnetic Resonance Imaging (MRI)
MRI is an imaging method that produces pictures of the body using a magnet and radio waves.
MRI is done to evaluate the structure and function of the heart and blood vessels.
MRI may provide your/your child’s cardiologist with information that cannot be obtained by other tests such as an X-ray picture of the chest, ECG, echocardiogram (cardiac ultrasound), or other tests.
www.americanheart.org /presenter.jhtml?identifier=3005170   (1078 words)

  
 Magnetic Resonance Imaging - MSN Encarta
MRI is possible in the human body because the body is filled with small biological “magnets,” the most abundant and responsive of which is the proton, the nucleus of the hydrogen atom.
Because it does not use ionizing radiation, MRI is risk free except for patients with cardiac pacemakers, patients who might have iron filings next to their eyes (for example, sheet metal workers), patients with inner ear transplants, and patients with aneurysm clips in their brains.
In the early 2000s open MRI scanners were introduced as an alternative to the standard MRI machine, which encloses the body, requires the patient to lie immobile for 45 minutes, and makes disturbing, loud noises.
encarta.msn.com /encnet/refpages/RefArticle.aspx?refid=761579758   (563 words)

  
 MedlinePlus Medical Encyclopedia: Heart MRI
MRI also should not be used for people with metallic objects in their bodies such as inner ear (cochlear) implants, brain aneurysm clips, some artificial heart valves, older vascular stents, and recently placed artificial joints.
MRI is sometimes used to avoid the dangers of angiography, repeated exposure to radiation, or exposure to iodinated contrast dye.
MRI is usually not recommended for traumatic injuries, because traction and life-support equipment cannot safely enter the scanner area, and scan times are relatively lengthy.
www.nlm.nih.gov /medlineplus/ency/article/003795.htm   (1211 words)

  
 Magnetic Resonance Imaging (MRI scan)
An MRI scan is particularly useful as an aid in the assessment of certain back conditions by providing detail of the spinal disc (such as for degenerative disc disease, isthmic spondylolisthesis) and nerve roots (such as for lumbar disc herniation, lumbar spinal stenosis).
MRI scans are also useful to rule out tumors or spinal infections.
Because most MRI scanners are fairly tight, certain patients may feel uncomfortable, or may not tolerate, lying in a tight tunnel for 45 to 60 minutes while the scan is being performed.
www.spine-health.com /topics/diag/mri/mri02.html   (371 words)

  
 New Page 2   (Site not responding. Last check: 2007-10-10)
MRI uses a strong magnetic field and a radio beam to create high quality images of internal organs.
A MRI scanner consists of a large and super strong magnet in which the patient lies.
MRI is expensive, and is therefore usually reserved for cases where other imaging methods are not sufficient.
www.sinc.sunysb.edu /Class/cei511/mri.htm   (648 words)

  
 Magnetic Resonance Imaging (MRI)
MRI can look at the brain for tumors, an aneurysm, bleeding in the brain, nerve injury, and other problems, such as damage caused by a stroke.
MRI of the chest may also be used to look for breast or lung cancer.
MRI can check for problems of the bones and joints, such as arthritis, problems with the temporomandibular joint, bone marrow problems, bone tumors, cartilage problems, torn ligaments or tendons, or infection.
www.webmd.com /hw/health_guide_atoz/hw214278.asp   (2023 words)

  
 Magnetic Resonance Imaging (MRI) - Lucile Packard Children's Hospital
MRI (magnetic resonance imaging) is a diagnostic procedure that uses a combination of a large magnet, radiofrequencies, and a computer to produce detailed images of organs and structures within the body.
If your child's physician schedules a MRI scan and decides to use contrast dye to enhance the pictures, your child may need to be NPO (fasting, nothing by mouth) for several hours prior to the procedure.
Parents may be able to stay with their child in the MRI room until he/she becomes sleepy, but are usually asked to wait in another area during the procedure to avoid exposure to unnecessary radiation.
www.lpch.org /DiseaseHealthInfo/HealthLibrary/cardiac/mri.html   (893 words)

  
 MRI
MRI often is used in the diagnosis of central nervous system disorders, such as multiple sclerosis, because of its high-resolution images of the brain and spinal cord's white and gray matter.
The presence of metal in your body may be a safety hazard or affect a portion of the MRI image.
Some MRI units may be wider, shorter or open on all sides, which may be more comfortable for you.
home.gwu.edu /~yongj/MRIcon.htm   (1108 words)

  
 BWH MRI Home Page
MRI is very helpful in looking for soft tissue, such as organs, muscle, cartilage, ligaments, and tendons in many parts of the body.
MRI was developed in England and Untied States in the 1980's.
MRI was first used at the Brigham and Women's Hospital in 1983.
www.brighamandwomens.org /mri   (199 words)

  
 MedlinePlus Medical Encyclopedia: MRI
MRI images taken after a special dye (contrast) is delivered into the body may provide additional information about the blood vessels.
MRI is usually not recommended for acute trauma situations, because traction and life-support equipment cannot safely enter the scanner area and the exam can take quite a bit of time.
People have been harmed in MRI machines when they did not remove metal objects from their clothes or when metal objects were left in the room by others.
www.nlm.nih.gov /medlineplus/ency/article/003335.htm   (1094 words)

  
 What is MRI?   (Site not responding. Last check: 2007-10-10)
MRI is a way of getting pictures of various parts of your body without the use of x-rays, unlike regular x-rays pictures and CAT scans.
MRI is quite safe in the majority of patients.
MRI scanners are good at looking at the non-bony parts or "soft tissues" of the body.
www.mritutor.org /mritutor/WhatisMR.html   (581 words)

  
 MRI scan
MRI (magnetic resonance imaging) is a fairly new technique that has been used since the beginning of the 1980s.
The MRI scan uses magnetic and radio waves, meaning that there is no exposure to X-rays or any other damaging forms of radiation.
An MRI scan is also able to provide clear pictures of parts of the body that are surrounded by bone tissue, so the technique is useful when examining the brain and spinal cord.
www.netdoctor.co.uk /health_advice/examinations/mriscan.htm   (858 words)

  
 Magnetic Resonance Imaging (MRI)
MRI is commonly used to examine the brain, spine, joints, abdomen, and pelvis.
An MRI of the brain produces very detailed pictures of the brain and is commonly used to study people with such problems as headaches, seizures, weakness, hearing loss, and blurry vision.
MRI of the abdomen is most frequently used to look more specifically at an abnormality seen on another test, such as an ultrasound or a CT scan.
www.emedicinehealth.com /magnetic_resonance_imaging_mri/article_em.htm   (639 words)

  
 MRI: Magnetic Resonance Imaging   (Site not responding. Last check: 2007-10-10)
The best MRI technique involves the use of a special "breast coil." During an MRI, you lie still and are moved in and out of a narrow tube as the machine creates images of your body.
MRI is sometimes used successfully in women who have breast cancer cells in an underarm lymph node, but have no breast mass that doctors are able to feel or see on a mammogram.
MRI can help determine if a cancer is limited to one area of the breast, or if it is "multicentric" and involves more than one area.
www.breastcancer.org /testing_mri.html   (593 words)

  
 Video: MRI - MayoClinic.com
Tell your MRI technologist if you have metal or electronic devices in your body, because their presence may be a safety hazard.
MRIs that require your head to be in the machine often include a mirror for you to see out.
Once your MRI is complete, you may be asked to wait until the images are reviewed to make sure that no additional imaging is necessary.
www.mayoclinic.com /health/mri/MM00395   (717 words)

  
 MRI
An MRI (or magnetic resonance imaging) scan is a radiology technique that uses radio waves, magnetism, and a computer to produce images of body architectures.
MRI scanning is painless and does not involve x-ray.
Magnetic resonance imaging (MRI) is a safe and painless test that produces very clear cross-sectional or three-dimensional images of the body’s tissues, even through bone and other obstructions.
www.radiology83.com /Services/MRI.htm   (496 words)

  
 Magnetic resonance imaging - Wikipedia, the free encyclopedia
MRI has also found many novel applications outside of the medical and biological fields such as rock permeability to hydrocarbons and certain non-destructive testing methods such as produce and timber quality characterization.
Most MRI centers require an orbital x-ray be performed on anyone who suspects they may have small metal fragments in their eyes, perhaps from a previous accident, something not uncommon in metalworking.
Reflecting the fundamental importance and applicability of MRI in the medical field, Paul Lauterbur and Sir Peter Mansfield were awarded the 2003 Nobel Prize in Medicine for their "discoveries concerning magnetic resonance imaging".
en.wikipedia.org /wiki/MRI   (6894 words)

  
 Do I need an MRI scan?
An MRI scan is generally considered to be the single best imaging study of the spine to help plan treatment for back pain.
MRI scans are extremely sensitive to picking up information about the health of the discs, as well as the presence of any tumors or a lumbar disc herniation (see figure 1) pinching the nerve roots and causing back pain.
The developed MRI scan image shows anatomy by differentiating between tissues that have a lot of water (such as fat, cerebrospinal fluid or discs) and tissues that do not have much water (such as bone, cartilage, and nerve roots).
www.spine-health.com /topics/diag/mri/mri03.html   (420 words)

  
 MRI Information on Healthline
MRI is a non-invasive procedure that uses powerful magnets and radio waves to construct pictures of the body.
Since MRI makes use of radio waves very close in frequency to those of ordinary FM radio stations, the scanner must be located within a specially shielded room to avoid outside interference.
MRI also should not be used for people with metallic objects in their bodies, such as:
www.healthline.com /adamcontent/mri   (676 words)

  
 MRI: Viewing your brain and other soft tissues - MayoClinic.com
MRI is a noninvasive way for your doctor to examine your body, in particular your brain, neck, spinal cord and soft tissues.
MRI often helps with the diagnosis of central nervous system disorders, such as multiple sclerosis, because it produces such high-resolution images of the brain and spinal cord.
Some types of MRI scans can be enhanced by the injection of a contrast material via an intravenous line placed in your hand or arm.
www.mayoclinic.com /health/mri/SM00035   (1169 words)

  
 MRI
During a MRI examination the part of your body to be studied will be positioned in the center of the magnet and imaged.
MRI uses magnetic fields, radio waves and complex computer processing to produce detailed images of the body.
MRI can be used to examine arteries of the brain, neck, chest, abdomen and MRA.
www.harthosp.org /radiology/mr.asp   (1206 words)

  
 National MS Society | Sourcebook: MRI   (Site not responding. Last check: 2007-10-10)
Because MRI is particularly useful in detecting central nervous system demyelination, it is a powerful tool in helping to establish the diagnosis of MS.
Also, since many lesions seen on MRI may be in so-called "silent" areas of the brain, it is not always possible to make a specific correlation between what is seen on the MRI scan and the patient's clinical signs and symptoms.
MRI is particularly helpful in patients who have had a single demyelinating attack that is suggestive of MS, also called a clinically-isolated syndrome.
www.nationalmssociety.org /Sourcebook-MRI.asp   (763 words)

  
 CHFpatients.com - CHF Tests - MRI
While quality of an MRI exam depends on a lot of factors, a standard (closed) high field magnet will perform better than a low or midfield open magnet, if everything else is the same.
However, the fast cine MRI stress test should not be used in patients with pacemakers, cochlear (ear) implants, metal clips or pins, or ICDs.
The fast cine MRI is able to capture the heart's movement at almost the same time the heart is actually contracting and relaxing - almost "real time." Patients get an IV drug called dobutamine and are placed in the MRI machine.
www.chfpatients.com /tests/mri.htm   (2643 words)

  
 Lymphoma Information Network - Testing: MRI
MRI produces pictures of various parts of your body without the use of x-rays (unlike regular x-rays pictures and CT scans) and without the use of nuclear element injection like gallium scans.
MRI is quite safe in the majority of patients and there are no documented side effects.
Advances in MRI technology have led to open MRI machines that are less confining than the tunnel type MRI machines of old.
www.lymphomainfo.net /tests/mri.html   (829 words)

  
 Athens Regional Medical Center
In addition to the high-field MRI located inside the hospital, the Physician's Imaging Center on King Avenue is home to our new Open-Access MRI.
MRI is a method used by physicians to look inside the body to help determine what, if anything, is wrong.
MRI produces images of the body without the use of radiation, unlike x-ray and CT scanning.
www.armc.org /health/pic/mri.shtml   (453 words)

  
 What Is Magnetic Resonance Imaging (MRI)?
Magnetic Resonance Imaging, or MRI, is a painless and safe diagnostic procedure that uses a powerful magnet and radio waves to produce detailed images of the body's organs and structures, without the use of X-rays or other radiation.
MRI is arguably the greatest advance in diagnostic medical techniques over the past century.
The MRI scanning machine is a large donut-shaped magnet with a sliding scanning table.
www.ehealthmd.com /library/mri/MRI_whatis.html   (553 words)

  
 1. Noble Nobel?
Right: MRI of a 7-year-old child's brain clearly shows a large malignancy (arrows) involving the brain stem and mid-brain.
In fl and white, Raymond Damadian, one of the pioneers of magnetic resonance imaging (MRI) in medicine, was telling the Nobel committee that the 2003 awards had ignored one of the inventors of MRI.
MRIs, magnetic resonance images, are pictures of the body's interior made by computerized manipulation of data produced by magnetic resonance.
whyfiles.org /188nobel_mri   (892 words)

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