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As the patient enters an MRI scanner a large magnet surrounds the patient. The scanner subjects nuclei of the body's atoms to a radio signal, temporarily knocking select ones out of alignment. When the signal stops, the nuclei return to the aligned position, releasing their own faint radio frequencies, which are sent to a computer to build up detailed images of the patient's anatomy.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoA strong field is applied to a person's body. This causes the hydrogen atoms inside their water molecules to rotate with a particular frequency. This rotation produces a signal that can be detected by the MRI scanner.
Wiki User
∙ 14y agoIt basically works by detecting blood flow in the brain. Areas that use more energy in the brain require more blood flow and thus more oxygen. A more oxygen-rich blood flow produces a different magnetic resonance (the "MR" in fMRI) than oxygen-poor blood flow. Magnetic fields combine with radio waves cause the nuclei of atoms to "flip". This property is known as magnetic resonance. Thus an fMRI scan sends out magnetic and radio waves to find the high levels of oxygen-rich blood.
Wiki User
∙ 11y agou go 2 the docs
Wiki User
∙ 14y agohttp://www.simplyphysics.com/page2_1.html
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Do MRI scanners have any adverse effects?
MRI scanners have practically no adverse effects. MRI or magnetic resonance imaging works by noting difference of various images created by varying response of different body tissues.
Do you say an MRI or a MRI?
an MRI
Do you say a MRI or an MRI?
an MRI
Where can I find open MRI technician certification?
If you want to get certified for MRI technician you can find open MRI technician certification at: http://education-portal.com/articles/MRI_Technician_Training_Certificate_and_Certification_Program_Options.html More info here: http://www.ehow.com/about_6619926_mri-tech-certification.html and here: http://www.innerbody.com/careers-in-health/guide-to-becoming-mri-tech.html
Will my head be out of the MRI for an MRI of my tibia?
If the MRI technologist positions you with your leg going into the magnet (the MRI machine) then your head would be out of it. Call the facility where you are scheduled to have the MRI and ask to speak with the MRI technologist and they can fully explain to you exactly how you will be positioned.
Where can you find an mri tech job?
You can find an mri tech job at www.indeed.com/q-MRI-Technologist-jobs.html, www.simplyhired.com/a/jobs/list/q-mri+technologist, www.careerbuilder.com/Jobs/Keyword/Mri-Technologist/
Is a MRI a treatment?
No. It is not a treatment it is a scan. An MRI is a Magnetic Resonance Imaging. MRI are used for imaging tissues.
Where is the magnetic field in a MRI?
manly in the middle of the mri
What is true about MRI images?
MRI can damage cells
What cpt code for MRI of kidneys?
renal MRI
How does mri work on the brain?
It sends of pictures of the brain to the dumb people at answers.com that let you answer your own question or it shows the activity in your brain....but that works too.
What is an MRI referring agency?
The agency that referred the patient for the MRI; the doctor or clinic.
