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MR Angiography

What is MRI?
MRI is a noninvasive medical test that helps physicians diagnose and treat medical conditions.
MRI uses a powerful magnetic field, radio frequency pulses and a computer to produce detailed pictures of Organs, soft tissues, bone and virtually all other internal body structures. The images can then be examined On A computer monitor, transmitted electronically, printed or copied to a CD. MRI does not use ionizing Radiation (x-rays).
Detailed MR images allow physicians to evaluate various parts of the body and determine the presence of Certain diseases.

Why should I do it?
Physicians use the procedure to:

  • Identify abnormalities, such as aneurysms, in the aorta, both in the chest and abdomen, or in other Arteries.
  • Detect atherosclerotic (plaque) disease in the carotid artery of the neck, which may limit blood flow to The brain and cause a stroke.
  • Identify a small aneurysm or arteriovenous malformation (abnormal communications between blood vessels) inside the brain.
  • Detect atherosclerotic disease that has narrowed the arteries to the legs and help prepare for Endovascular intervention or surgery.
  • Detect disease in the arteries to the kidneys or visualize blood flow to help prepare for a kidney Transplant.
  • Guide interventional radiologists and surgeons making repairs to diseased blood vessels, such as Implanting stents or evaluating a stent after implantation.
  • Detect injury to one or more arteries in the neck, chest, abdomen, pelvis or extremities in patients after Trauma.
  • Evaluate arteries feeding a tumor prior to surgery or other procedures such as chemoembolization or Selective internal radiation therapy.
  • Identify dissection or splitting in the aorta in the chest or abdomen or its major branches.
  • Show the extent and severity of atherosclerosis in the coronary arteries and plan for a surgical Operation, such as a coronary bypass and stenting.
  • Sample blood from specific veins in the body to detect any endocrine disease.
  • Examine pulmonary arteries in the lungs to detect pulmonary embolism (blood clots, such as those Traveling from leg veins).
  • Look at congenital abnormalities in blood vessels, especially arteries in children (e.g., malformations in The heart or other blood vessels due to birth defects).
  • Evaluate obstructions of vessels.

Any preparations needed?

  • Guidelines about eating and drinking before an MRI exam vary with the specific exam.
  • The radiologist or technologist may ask if you have allergies of any kind, such as allergy to iodine or x-Ray contrast material, drugs, food, the environment, or asthma.
  • The radiologist should also know if you have any serious health problems, or if you have recently had Surgery.
  • Women should always inform their physician or technologist if there is any possibility that they are Pregnant.
  • If you have claustrophobia (fear of enclosed spaces) or anxiety, you may want to ask your physician for a Prescription for a mild sedative prior to the scheduled examination.
  • Jewelry and other accessories should be left at home if possible, or removed prior to the MRI scan. These items include
    • Jewelry, watches, credit cards and hearing aids, all of which can be damaged.
    • Pins, hairpins, metal zippers and similar metallic items, which can distort MRI images.
    • Removable dental work.
    • Pens, pocket knives and eyeglasses.
  • People with the following implants cannot be scanned and should not enter the MRI scanning area unless explicitly instructed to do so by a radiologist or Technologist who is aware of the presence of any of the following:
    • Internal (implanted) defibrillator or pacemaker
    • Cochlear (ear) implant
    • Some types of clips used on brain aneurysms
    • Some types of metal coils placed within blood vessels
  • You should tell the technologist if you have medical or electronic devices in your body, because they may interfere with the exam or potentially pose a risk, Depending on their nature and the strength of the MRI magnet. Some implanted devices require a short period of time after placement (usually six weeks) Before being safe for MRI examinations. Examples include but are not limited to:
    • Artificial heart valves
    • Implanted drug infusion ports
    • Implanted electronic device, including a cardiac pacemaker
    • Artificial limbs or metallic joint prostheses
    • Implanted nerve stimulators
    • Metal pins, screws, plates, stents or surgical staples
  • A recently placed artificial joint may require the use of another imaging procedure. If there is any question of their presence, an x-ray may be taken to detect And identify any metal objects.
  • Patients who might have metal objects in certain parts of their bodies may also require an x-ray prior to an MRI.
  • Parents who accompany children into the scanning room also need to remove metal objects and notify the technologist of any medical or electronic devices They may have.
  • Infants and young children may require sedation or anesthesia to complete an MRI exam without moving