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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

How does MRI use electromagnets?

  • An MRI uses electromagnets to produce an super strong magnetic field. This field causes changes in the behavior of cells and when the magnet is off those cells emit a detectable wave that is picked up by sensors. A computer then interprets those signals and creates a picture of the tissue. The picture is then looked at by specialists to find things that are not normal compared to surrounding tissue.

What does essentially normal mean?

Normal is a hard thing to define. If the "normal" height for a woman is 66 inches, is a woman of 64 inches abnormal? No, she's "essentially normal." While it's not a very descriptive phrase, essentially normal means that it's within the range of normal human anatomy/physiology.

Are you free to approach an MRI machine if it has been turned off?

Yes, and even when MRI machines are in use, they are very safe if proper procedures are employed.

What advantage does the MRI scan have over the Pet scan for the subject?

A PET scan shows what level / stage (if any) the cancer is at. An MRI scan doesn't do this, the reader, looks for abnormalities on the scan which shows up everything in the body.

Do you have to fast before an MRI?

Eating Before Having An MRIFor certain kinds of MRI scan (e.g. an MRCP which looks at the biliary system) it's very important that you don't eat or drink for 4-6 hours before the scan. If you're having a scan of your pelvis it's often best not to eat beforehand so that artefact from bowel motion is reduced. The radiographers or technologists at the MRI Unit will advise you on the specific requirements for your scan though.

Is MRI safe with titanium dental implants in jaw?

Yes, it is generally safe to have an MRI (Magnetic Resonance Imaging) if you have titanium dental implants. Titanium is a non-magnetic material that is commonly used for dental implants precisely because it is compatible with medical imaging techniques like MRI.

Titanium is not affected by the magnetic field of an MRI machine, so it does not pose a risk of movement or displacement during the imaging process. However, it's always important to inform the MRI technician or radiologist about any implants or metal objects in your body before undergoing an MRI. They can provide specific instructions and ensure that appropriate precautions are taken to ensure your safety and the quality of the imaging.

In some cases, the presence of dental implants may cause artifacts on the MRI images, which can make it slightly more challenging to interpret the results. However, modern MRI machines are equipped with advanced imaging techniques that can minimize or compensate for these artifacts, allowing for a clear visualization of the area of interest.

It's worth noting that if you have any other metal implants or devices in your body, such as certain types of joint replacements or pacemakers, there may be additional considerations or precautions to take before undergoing an MRI. Therefore, it's crucial to provide a comprehensive list of any implants, devices, or metal objects to the medical staff prior to the MRI.

In summary, having titanium dental implants should not prevent you from safely undergoing an MRI. However, it's important to inform the MRI technician about your dental implants and any other metal objects in your body to ensure appropriate safety measures are taken and to obtain the most accurate imaging results.

How are MRI images formed?

The magnetic and radio wave bursts stimulate signals from hydrogen atoms in the patient's tissues that, when subjected to computer analysis, create a cross-sectional image of internal structures and organs

Can you have MRI scan with titanium implant?

No, Titanium is not magnetic so the MRI won't bother the implants. The implants don't show up very well on the scans either but they will on an x-ray. My wife had brain surgery and they used a titaniun plate to cover the hole in her head and she gets required MRI scans of her head.

Are picc lines safe for an mri exam?

There are no indications whether a picc line is safe with a MRI. I would not see any reason why not.

What are the health hazards of MRI scan?

MRI scans are one of the safest type of scan in modern medicine. The detailed results it gives without the danger of radiation is remarkable. There is one well known hazard however, that is that any metal in a persons body will damage the body due to the magnetic aspects of the MRI.

What does it mean to have white spots show in a mri results?

I've been researching a little and one white spot might be one attack of the immune system, single scelorosis. this is a possibility. it can mean so many other things. more than one spot might mean multiple sclerosis.

What is mri internal auditory meatus both?

An MRI (magnetic resonance imaging) is a tool used to examine internal body structures. An MRI of the internal auditory meatus is an MRI scan used to look for a problem with the nerves supplying the inner ear.

When is the mri scanner used and to see what?

Dr. Raymond Damadian, a physician and scientist, toiled for years trying to produce a machine that could noninvasively scan the body with the use of magnets. Along with some graduate students, he constructed a superconducting magnet and fashioned a coil of antenna wires. Since no one wanted to be the first one in this contraption, Damadian volunteered to be the first patient.

When he climbed in, however, nothing happened. Damadian was looking at years wasted on a failed invention, but one of his colleagues bravely suggested that he might be too big for the machine. A svelte graduate student volunteered to give it a try, and on July 3, 1977, the first MRI exam was performed on a human being. It took almost five hours to produce one image, and that original machine, named the "Indomitable," is now owned by the Smithsonian Institution.

Hope it helps xx

DD

Does an MRI show up glass?

does glass show up on xray

Does mri use radiation?

CT Scan is the short form of Computed Tomography, also known as CAT scans. In this technique, the patients are exposed to higher radiation levels compared to most of other imaging techniques.

CT Scan technology involves the use of an X-ray generating device that rotates around the patient's body. These powerful beams are picked up by an array of detectors and used by a computer to generate a three-dimensional view of a body region.

Experts agree that when used correctly, such scans can save lives. However, according to some estimates, the radiation exposure a patient receives from a full-body CT scan is often 500 times that of a conventional X-ray and about the same as that received by people living 2.4 kilometres away from the centres of the World War II atomic blasts in Japan.

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Related URLs:

http://www.newscientist.com/article/dn11827-ct-scan-radiation-can-equal-nuclear-bomb-exposure-.html

http://www.radiologyinfo.org/en/info.cfm?PG=bodyct

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By Gipson Edappazham

What are the best MRI technician schools?

In order to obtain a job as an MRI tech, it is best to get an associates degree in radiologic technology. This will help you have an understanding for how the technology works. There are also certificates you can obtain that you have the ability to operate an MRI machine.

What neurological disorders can be diagnosed by the mri?

Lots! Most abnormalities of the brain can be seen on MRI better than on a CAT scan e.g. brain tumours, multiple sclerosis, Parkinson's, blood clots and lesions. Neuro science is a complex area with numerous diseases and the MRI has greatly assisted in diagnosing neurological conditions.

When was the first mri scan done?

i was, honestly, it doesnt hurt. just shocking orcoucre becasue of what i was going through. my name is Sophie perkins and is there anythoing you woulkd like to ask me about it. i'llbe happy to help you.