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Contents contributed and discussions participated by chasefortier

chasefortier

What are the risks of an MRI scan? - MRI: Get the Facts and Risks of Magnetic Resonance... - 0 views

  • There are no known side effects of an MRI scan.
  • Metallic chips, materials, surgical clips, or foreign material (artificial joints, metallic bone plates, or prosthetic devices, etc.) can significantly distort the images obtained by the MRI scanner.
chasefortier

MRI Specialized Imaging Studies - 0 views

  • MR Angiography: MR angiography can provide diagnostic images of the vascular system without the need for arterial puncture or catheters.  A quick, non-invasive means for evaluating most vascular problems is now available. MR angiography is used to evaluate aneurysms and other malformations in blood vessels, to screen for arterial diseases and abnormalities in the body’s circulating system.  Intravenous Gadolinium contrast is used to visualize abnormalities in the neck, abdomen, renal system and extremities. Non-Invasive Prostate Imaging: MRI can provide extremely accurate information for the diagnosis and pre-treatment planning of prostate cancer.  In the past, this predominantly involved the use of a coil placed within the rectum.  Now, with advances in coil technology and software, these studies can be performed with a coil placed over the pelvic area.  These new coils provide images of similar resolution without the discomfort of the endo-rectal coil. Breast MRI: Breast MRI has emerged as a valuable addition to conventional imaging modalities in the detection of primary and recurrent breast cancer.  It is mainly used in cases that are difficult to evaluate with mammography or ultrasound, or where there are conflicting findings between these two modalities.  MRI also allows early diagnosis of primary and recurrent breast cancer in high-risk patients.
chasefortier

Inventor of the Week: Archive - 0 views

  • Experimenting on rats, Damadian discovered dramatic differences in the quality and duration of NMR signals emitted by cancerous versus healthy tissues that confirmed his idea of the MR body scanner.
  • Finally, in 1977, Damadian's team produced the first MRI scan of the human body, using a prototype device he called "Indomitable" (now installed in the Smithsonian Institution).
  • The first MRI scan provided a clear image of the heart, lungs and chest wall with no side effects. Today, MRI scanners can instantly map and analyze any part of the human body in minute detail, allowing visual diagnosis of virtually any medical condition, from strained muscles to tumors. They can also provide the chemical composition of the tissue being scanned.
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  • Later the company developed the first FDA-approved, first mobile, and first whole-body MR scanners. FONAR's patented Iron Circuit™ technology has enabled the company to develop seven different MRI products including the recently cleared-for-marketing FONAR 360°, a full-size room with two circular structures (the poles of the magnet) projecting from the ceiling and the floor. There are no obstructions between the patient and the walls of the scanner room, and the patient is accessible from any direction. Damadian is also working on the Stand-Up MRI™, the only scanner that allows MRI patients to be scanned while standing up.
chasefortier

Course Information Technology: How MRI Changed the World - 0 views

  • MRI, has improved findings of malignant diseases and saved thousands of lives.
  • It has made early diagnosing of certain diseases possible.
  • especially useful in neurological (brain), musculoskeletal, cardiovascular, and oncological (cancer) imaging.
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  • Damadian's invention came from his observations that the tissue in a cancerous tumor looked differently than healthy tissue, after both tissue samples had been exposed to nuclear magnetic resonance.
  • first MRI examination was performed on July 3, 1977
  • first commercially available MRI was sold in 1980
  • MRI was originally a technique that was referred to as nuclear magnetic resonance imaging (NMRI). However, because the word nuclear was associated in the public mind with ionizing radiation exposure, it is generally now referred to simply as MRI.
  • In a recent study that compared radiography and MRI, MRI demonstrated significantly more erosions than radiography.” (Mak & Hunter, 2009).  MRI has particular advantages in that it is non-invasive, using non-ionizing radiation, and has a high soft-tissue resolution and discrimination in any imaging plane. It may also provide both morphological and functional information.
  • Without this ability, it would be a challenge for physicians to diagnose the correct illness. Instead, to understand what exactly is going on inside the patient, the physicians might have to surgically open the patient.
  • MRI scans have provided valuable images, two dimensional and three dimensional, that aid physicians when they diagnose diseases or problems.
chasefortier

HowStuffWorks "How MRI Works" - 1 views

  • An MRI scan is the best way to see inside the human body without cutting it open.
  • Doctors may order MRI scans to help diagnose multiple sclerosis, brain tumors, torn ligaments, tendonitis, cancer and strokes,
chasefortier

Magnetic resonance imaging - 0 views

  • MRI is very good at finding and pinpointing some cancers. An MRI with contrast dye is the best way to see brain tumors. Using MRI, doctors can sometimes tell if a tumor is benign (not cancer) or malignant (cancer).
  • Special MRI machines, now available in some hospitals, are designed just for looking inside the breast.
  • 45 and 60 minutes and sometimes up to 2 hours
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    cancer detection with the MRI
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