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Magnetic Resonance Imaging

That original machine, which now sits in the Smithsonian Institution, was a machine that helped to change the outlook of modern medicine, as we know it. .
             Many people through out the world probably have no idea what an MRI machine looks like. The basic design is a giant cube-like structure that is generally seven feet tall by seven feet wide by ten feet long. In the center of this cube, there is a horizontal table called a bore. (www.howstuffworks.com) The bore runs through the magnet from the front of the machine to the back. The person who is receiving the test lies on their back and depending on the exam will be slid in head first or feet first. The way the "body responds to those fields and how it relaxes when the magnetic field is removed is noted and sent to a computer along with information about where the interaction occurred." (www.heathcommunities.com) At the same time, radio wave pulses of energy can pick out a very small point inside the body of a patient and deceivers which type of tissue it is. The MRI system goes "through the patient's body point-by-point, building up a 2-D or 3-D map of tissue types." (www.wellnessweb.com) The displayed results in the end are images of slices or cross-sections of the body that give doctors and surgeons an unparalleled view inside of any human body. The slices can be taken n any plane chosen by the machine operator. The parts of the body such as fat have a high signal and are displayed with the color white. Other parts of the body such as air in the lungs are seen in the color black. Muscles and tendons generally show up in the color gray. (www.wellnessweb.com) The machine operators are able to change the parameters and that causes the tissue in the body to take on different appearances which is very helpful to doctors because it allows them to see if something is normal or not. The MRI gives doctors and surgeons an unbelievable view inside the human body with a level of detail that is extraordinary when compared to other imaging machines used by hospitals.


Essays Related to Magnetic Resonance Imaging

1. Advancements In Diagnostic Imaging Techniques Of The Brain

... appear brighter. Because gadolinium normally stays in blood vessels, it has the effect of making vessels, highly vascular tissues, and areas of blood leakage appear brighter (Sutton 209-21). Functional Magnetic Resonance Imaging, a groundbreaking method of scanning the brain's activity that needs no radioactive materials and produces images at a higher resolution than PET is based on differences in the ... look at the brain and how it functions. PET scanners actually provide a working image of the brain in motion. Brain imaging has witnessed significant progress in recent years. The BOL...

  • Word Count: 3038
  • Approx Pages: 12
  • Has Bibliography
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2. Brain-Imaging Studies Advanced Our Understanding

... and advanced people understanding of the brain. In the study of brain, many new technologies have been released. The function neuroimaging techniques, PET (Positron Emission Temography) and fMRI (functional Magnetic Resonance Imaging), offer sufficient experimental result and efficient way of brain study. PET and fMRI are new kind of medical instrument which is different from the physical tools, without having to open ... changes in haemodynamic responses that are correlated with changes in neuronal activity: PET is sensitive to local changes in blood flow, and fMRI is sensitive to oxyg...

  • Word Count: 1359
  • Approx Pages: 5
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3. The Human Brain and Methods of Discovery

... possible for better and more accurate techniques to be applied to scan the human body. These methods employ various scanners like the CT (computerized tomography), PET (positron emission tomography), MRI (magnetic resonance imaging) and SPECT (single photon emission computed tomography). The CT is an acronym for computerized tomography. This method of scanning involves computer-enhanced X rays of brain structures, shot from many angles ... . Doctors and scientists are able to view the three dimensional format on a computer screen. MRI stands for magnetic resonance imaging. This scan uses...

  • Word Count: 1710
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4. Diagnostic Medical Sonography

... the rise, the need for adequately trained personnel is a hard one to meet. Diagnostic Medical Sonography is becoming an increasingly attractive alternative to radiologic procedures such as X ray and magnetic resonance imaging (MRI). Accounting for approximately 33,000 jobs in the United States in 2000, compared to the 167,000 jobs held by radiologic technicians, Sonography is a small, but rapidly growing ... are several different procedures that help the doctors when diagnosing ailments. Radiology, commonly known as x ray, uses radiation to produce a picture on film. Another common imag...

  • Word Count: 1300
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5. Radiology and Medicine

... 1972. Sir Goodfry Hounsfield of Great Britain invented computer tomography imagining. Ultra sounds technology became available in the same time providing 2-d imagines and soon 3-d images. Radiological imaging is constantly evolving as computer technology advances. The author of this article is Mr. Otha W. Linton he is an executive Director of the American College of Radiology and ... needed to adjust analyses for confounding variables. As the diagnostic requirements are increasing, more sensitive and sophisticated radiological methods, such as high-resolution computed tomography, magnetic...

  • Word Count: 1093
  • Approx Pages: 4
  • Grade Level: High School

6. Effects of Methamphetamine Abuse on Neurotransmission

... ) and Volkow et al. (2001a) provide evidence of the long-term effects of methamphetamine abuse on dopamine transport systems, neurocognition, and psychomotor functioning. Researchers use a variety of imaging techniques in order to determine the degree of neuronal damage in the brain of methamphetamine abusers. The most commonly used instrument for measuring dopamine transport activity in the brain is ... pulse sequences to identify areas of the brain containing certain types of neurotransmitters. It is a noninvasive technique very similar to an additional device used in neurotransmitter ...

  • Word Count: 2798
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7. Superconductor

... wires that can be wound to make generators, motors, and electromagnets. These commercial superconductors have critical temperatures in the range of 10 K. They can generate very powerful magnetic fields, and they have a current density of around 2000 amperes per square millimeter. Most of the current superconductivity applications use the commercial niobium-titanium or vanadium-gallium superconductors ... communication systems. Medicine. There are many uses of superconductivity in medicine, and most of them revolve around one system called MRI. MRI, or Magnetic Resonance Imaging, is the m...

  • Word Count: 2790
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8. Applications of Electromagnetism

... the cone. This pushing and pulling creates sound waves. Some of the more significant uses of electromagnetism are such as in magnetic resonance imaging or MRI's. when a patient receives and MRI he/she is put into a large tube which is like a giant solenoid with super conducting ... radio like transmissions. The strength of the magnetic field inside the solenoid can be varied in order to detect different molecules in different parts of the body as well. With this, it is possible to produce a computer generated resonance image. These pictures can help doctors to ... come up with images t...

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9. cancer

... used to find lung cancer and to see where in the body it may have spread include x-rays, CT scan (computed tomography), MRI (magnetic resonance imaging), PET (positron emission tomography) scans, and bone scans. Sputum cytology: a sample of phlegm (spit) is looked at under a microscope to see if cancer cells are present. Needle biopsy: a needle is ... but who are at risk for developing a second lung cancer. The greatest risk for patients with stage I NSCLC is that micrometastases (deposits of cancer too small to be detected by imaging tests) are present even when surgeons believe that ...

  • Word Count: 4620
  • Approx Pages: 18
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