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MRI
MRI stands for magnetic resonance imaging. It is a particularly useful scan for neurology, cardiology and oncology patients. Questions on how they work, their development and uses can go in this category.
800 Questions
Will a MRI work without a magnet?
No. Put simply, an MRI scanner utilised radio waves and a magnetic field. Without a magnet, there is no magnetic resonance imaging (MRI).
What is T2 hyperintense mass involving the brainstem in a child?
A T2 weighted image, on a MRI, is not diagnostic, in and of itself. T2 hyperintensity could represent tumor, infarction, hemorrhage, or trauma, for instance. In the context of the clinical picture, the MRI is extremely helpful. If there has been no trauma, then the location and appearance of the T2 hyperintensity can point to a vascular cause versus a space-occupying lesion. The clinical course of the patient will cinch the diagnosis, when combined with the MRI findings - in cases such as these.
In the case of a mass in the brainstem of a child, the most common cause would be that of a brainstem glioma. These account for anywhere between 10-20% of all brain tumors in children. However, this is not the only possibility (see above).
What does rule out HNP mean when they request it on a cervical mri?
"Rule out HNP" means check to see if there's a disk herniation in the neck.
How is M.R.I technology being improved for children?
I heard that the have cartoon wallpapers wrapped around the X-Ray machines, and also let the kids parents hold there hands during the scan with a new type of machine
It seems that they can do MRI without injecting contrast agents read the article below, this is part of a Wikipedia entry To see it all go to the related link(Magnetic resonance imaging) below.
The body is largely composed of water molecules which each contain two hydrogen nuclei or protons. When a person goes inside the powerful magnetic field of the scanner, the magnetic moments of these protons align with the direction of the field.
A radio frequency electromagnetic field is then briefly turned on, causing the protons to alter their alignment relative to the field. When this field is turned off the protons return to the original magnetization alignment. These alignment changes create a signal which can be detected by the scanner. The frequency at which the protons resonate depends on the strength of the magnetic field. The position of protons in the body can be determined by applying additional magnetic fields during the scan which allows an image of the body to be built up. These are created by turning gradient coils on and off which creates the knocking sounds heard during an MR scan.
Diseased tissue, such as tumors, can be detected because the protons in different tissues return to their equilibrium state at different rates. By changing the parameters on the scanner this effect is used to create contrast between different types of body tissue.
Contrast agents may be injected intravenously to enhance the appearance of blood vessels, tumors or inflammation. Contrast agents may also be directly injected into a joint in the case of arthrograms, MR images of joints. Unlike CT, MRI uses no ionizing radiation and is generally a very safe procedure. Patients with some metal implants, cochlear implants, and cardiac pacemakers are prevented from having an MRI scan due to effects of the strong magnetic field and powerful radio frequency pulses.
MRI is used to image every part of the body, and is particularly useful for neurological conditions, for disorders of the muscles and joints, for evaluating tumors, and for showing abnormalities in the heart and blood vessels.
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Nothing metal. Other than the no-metal rule, each hospital will have its own MRI dress code. Sometimes you have to wear the gown, sometimes you can just wear shorts and a t-shirt.
What is MRI and how do you explain it?
Magnetic resonance imaging (MRI) is the newest, and perhaps most versatile, medical imaging technology available. Doctors can get highly refined images of the body's interior without surgery, using MRI. By using strong magnets and pulses of radio waves to manipulate the natural magnetic properties in the body, this technique makes better images of organs and soft tissues than those of other scanning technologies. MRI is particularly useful for imaging the brain and spine, as well as the soft tissues of joints and the interior structure of bones. The entire body is visible to the technique, which poses few known health risks.
the Magnetic Resonance Imaging formally known as MRI first used on April 4, 1989 in Oxford, England!! Haha sike
The discs in your spine are starting to herniate outwards (they are like jelly sacs surrounded by hard tough flesh) which is causing pressure on some of the nerves in your spinal cord.
Lagers and ales are the two families of beer, distinguished by the type of yeast and the temperature of fermentation. Lagers are fermented at cooler temperatures by so-called "bottom fermenting" yeast. Beers in the lager family need to be conditioned-or "lagered"-somewhere cool for a number of weeks before they are ready to drink. Ales are fermented at warmer temperature by top-fermenting yeast strains, and are ready to drink sooner.
There are many distinct styles of beer within the lager and ale families: for example, pilsner is one of the most popular lager styles; and porter and stout are examples of ale styles. And in both families, beers can run the gamut from light to dark-colored, and from weak to strong alcohol.
How do you read my shoulder MRI film?
Here is a website that shows a tear http://orthoinfo.aaos.org/topic.cfm?topic=A00064&return_link=0 Here is another website that I found that shows more of the shoulder http://www.e-radiography.org/academia/Lecture%203.pdf hope that helps J
What do you mean by quench in relation to MRI scanners?
Most of the MRI scanners today use superconducting magnets that need liquid helium to keep them cold enough for proper function. A malfunction may, however, cause the helium to convert to gas and rapidly escape the cryogenic chamber that effectively demagnetizes the main MRI magnet. When this happens, a MRI magnet is said to have "quenched". This not only incurs expensive repairs to the equipment but the rapidly escaping helium in the close confines of a MRI suite may also cause asphyxiation injury to any person present there. Fortunately this catastrophe is extremely rare and has been virtually eliminated in the newer equipment through improved design.
If you are having symptoms of a medical problem, you should consult your doctor. Medical care obtained over the Internet is dangerous, since serious problems could be overlooked. Even the most innocuous symptoms could be manifestations of serious diseases.
Is a rash a reaction to the dye used for a MRI?
It could be however reactions to mri contrast are uncommon. Reactions are more often seen with use of contrast in x-ray and ct procedures due to the iodine content. Mri contrast does not contain iodine, it is made with gadolinium.With that being said anyone can have a rection to just about anything. I would suggest taking some benadryl. If it doesnt improve maybe a call to your doctor wouldn't hurt. Of course if you experienced anything like shortness of breath or swelling of the face go to the emergency room. Hope this was helpful.
Does sacroiliitis show up on xray or mri?
Yes, it can... May depend on just how long you've been having the pain... Physical exam is probably the best way to make the diagnosis... A fair screening test is to lie on your side on a firtm surface and have someone smash down [heavily] on your hip... or lie on your back, place one leg over the other [like crossing your legs] and have someone press down on your knee... this will put stress on the SI joint on that side of your body, resulting in a lot of pain [that's IF you have sacroiliitis on that side of your hip]...
What a finding on a mri saying mild inferior cerebellar ectopia means?
It may be a normal finding, depending on the clinical history. It may also represent a congenital disorder or, something worse, like an intracranial mass or edema. The clinical history is important. If the radiologist though the ectopia was an important diagnostic clue, more emphasis would be placed with recommendations.
MRI stands for "magnetic resonance imaging." An MRI is used in the medical field and provides a strong contrast of soft tissues that most medical equipment like a CT or X-ray cannot provide. A strong and expensive magnet is used to scan the body's healthy and diseased tissue. These machines may cost in the millions and will have varied strengths depending on the medical need for the scan.
MRI stands for Magnetic Resonance Imaging. It is a device used to visualize internal structures of the body in detail. It is especially useful in measuring the brain, muscles, the heart and cancers. This is due to the fact that it provides good contrast between soft tissues.
