Definitions for magnetic resonance imaging
mag·netic res·o·nance imag·ing

Princeton's WordNetRate this definition:0.0 / 0 votes

1. magnetic resonance imaging, MRInoun

   the use of nuclear magnetic resonance of protons to produce proton density images

GCIDERate this definition:0.0 / 0 votes

1. magnetic resonance imagingnoun

   a medical diagnostic procedure utilizing the phenomenon of nuclear magnetic resonance to generate images of internal parts of the body. It depends on the differential absorption of electromagnetic radiation by different types of living tissue in a magnetic field. It is complementary to X-ray imaging in that the softer tissue show more prominently in magnetic resonance images, rather than bone, as with X-rays. It is a non-invasive procedure, allowing such images to be obtained without penetration of the tissue by objects. It is abbreviated MRI. As with computerized tomography, the results are usually presented as images of sequential planar sections of that part of the body of concern to the physician.

WiktionaryRate this definition:0.0 / 0 votes

1. magnetic resonance imagingnoun

   A technique that uses nuclear magnetic resonance to form cross sectional images of the human body for diagnostic purposes.

WikipediaRate this definition:0.0 / 0 votes

1. Magnetic resonance imaging

   Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes of the body. MRI scanners use strong magnetic fields, magnetic field gradients, and radio waves to generate images of the organs in the body. MRI does not involve X-rays or the use of ionizing radiation, which distinguishes it from CT and PET scans. MRI is a medical application of nuclear magnetic resonance (NMR) which can also be used for imaging in other NMR applications, such as NMR spectroscopy. MRI is widely used in hospitals and clinics for medical diagnosis, staging and follow-up of disease. Compared to CT, MRI provides better contrast in images of soft-tissues, e.g. in the brain or abdomen. However, it may be perceived as less comfortable by patients, due to the usually longer and louder measurements with the subject in a long, confining tube, though "Open" MRI designs mostly relieve this. Additionally, implants and other non-removable metal in the body can pose a risk and may exclude some patients from undergoing an MRI examination safely. MRI was originally called NMRI (nuclear magnetic resonance imaging), but "nuclear" was dropped to avoid negative associations. Certain atomic nuclei are able to absorb radio frequency energy when placed in an external magnetic field; the resultant evolving spin polarization can induce a RF signal in a radio frequency coil and thereby be detected. In clinical and research MRI, hydrogen atoms are most often used to generate a macroscopic polarization that is detected by antennas close to the subject being examined. Hydrogen atoms are naturally abundant in humans and other biological organisms, particularly in water and fat. For this reason, most MRI scans essentially map the location of water and fat in the body. Pulses of radio waves excite the nuclear spin energy transition, and magnetic field gradients localize the polarization in space. By varying the parameters of the pulse sequence, different contrasts may be generated between tissues based on the relaxation properties of the hydrogen atoms therein. Since its development in the 1970s and 1980s, MRI has proven to be a versatile imaging technique. While MRI is most prominently used in diagnostic medicine and biomedical research, it also may be used to form images of non-living objects, such as mummies. Diffusion MRI and functional MRI extend the utility of MRI to capture neuronal tracts and blood flow respectively in the nervous system, in addition to detailed spatial images. The sustained increase in demand for MRI within health systems has led to concerns about cost effectiveness and overdiagnosis.

ChatGPTRate this definition:0.0 / 0 votes

1. magnetic resonance imaging

   Magnetic Resonance Imaging (MRI) is a non-invasive diagnostic technique that uses strong magnetic fields and radio waves to create detailed images of the internal structures within the body. Unlike X-rays and CT scans, MRI does not use ionizing radiation. It is used for detecting various medical conditions in organs, tissues, bones and blood vessels by producing detailed cross-sectional, 3D and 4D (in motion) images, which allow doctors to examine parts of the body in high resolution and in multiple planes.

WikidataRate this definition:0.0 / 0 votes

1. Magnetic resonance imaging

   Magnetic resonance imaging, nuclear magnetic resonance imaging, or magnetic resonance tomography is a medical imaging technique used in radiology to visualize internal structures of the body in detail. MRI makes use of the property of nuclear magnetic resonance to image nuclei of atoms inside the body. MRI can create more detailed images of the human body than possible with X-rays. An MRI scanner is a device in which the patient lies within a large, powerful magnet where the magnetic field is used to align the magnetization of some atomic nuclei in the body, and radio frequency magnetic fields are applied to systematically alter the alignment of this magnetization. This causes the nuclei to produce a rotating magnetic field detectable by the scanner—and this information is recorded to construct an image of the scanned area of the body. Magnetic field gradients cause nuclei at different locations to precess at different speeds, which allows spatial information to be recovered using Fourier analysis of the measured signal. By using gradients in different directions, 2D images or 3D volumes can be obtained in any arbitrary orientation. MRI provides good contrast between the different soft tissues of the body, which makes it especially useful in imaging the brain, muscles, the heart, and cancers compared with other medical imaging techniques such as computed tomography or X-rays. Unlike CT scans or traditional X-rays, MRI does not use ionizing radiation.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Magnetic Resonance Imaging

   Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.

Matched Categories

1. • Imaging

How to pronounce magnetic resonance imaging?

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How to say magnetic resonance imaging in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of magnetic resonance imaging in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of magnetic resonance imaging in Pythagorean Numerology is: 1

Examples of magnetic resonance imaging in a Sentence

1. James Brown:

   The economy is changing with an emphasis on technology skills across all sectors. The emphasis now is that not all STEM jobs require four-year degrees. When I was growing up, you had what were called ‘blue collar jobs,’ now you have technicians who need to be highly skilled in tech. You need people who can repair MRI (magnetic resonance imaging) machines, or work on electric cars, you now need technicians who need to have really hard STEM skills. That’s a skill set that will be growing over the next five years, it will be more in demand, and giving students the foundation for those kinds of careers starts in school.

2. Manuela Ferreira:

   Adults with sudden back pain do not need to rush to get an X-ray or magnetic resonance imaging (MRI), unless the clinician suspects the patient has a more serious condition, such as fracture or cancer, less than 5 percent of patients with low back pain, however, will fall into this category.

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=magnetic resonance imaging
2. ^ GCIDE
   https://gcide.gnu.org.ua/?q=magnetic resonance imaging
3. ^ Wiktionary
   https://en.wiktionary.org/wiki/Magnetic_Resonance_Imaging
4. ^ Wikipedia
   https://en.wikipedia.org/wiki/Magnetic_Resonance_Imaging
5. ^ ChatGPT
   https://chat.openai.com
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=magnetic resonance imaging