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HIGH FIELD MRI

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High field MRI systems operate at stronger field strengths and typically provide clearer, more detailed, and easier to read scans as compared to open or other systems. On a high field, or closed, MRI system, the slices can be thinner, improving the information available for the physician to use to diagnose any problems. Scans also take less time due to the stronger magnetic field.

 

Types of scans that should be performed on a high field scanner include:

  • Temporomandibular joints (TMJ)
  • Brain
  • Abdominal
  • Angiography
  • Recent CVA
  • Patients in severe pain that require faster scan time

ABOUT MRIs

Magnetic Resonance Imaging (MRI) is a method of obtaining detailed pictures of internal body structures without the use of radiation or radioactive substances of any kind. This is accomplished by placing the patient in a magnetic field while harmless radio waves are turned on and off. This causes the body to emit its own weak radio signals which vary according to tissue characteristics. These signals are then picked up by a sensitive antenna and fed to a computer which produces detailed images of the body for interpretation by a radiologist.

High Field MRI utilizes a cylindrical tube in which the magnet is enclosed. Patients are placed in the unit lying down, either head first or feet first.

Because this configuration produces optimum magnetic field strength, the signal and images produced are of the highest quality. High Field MRI exams usually take 5-15 minutes.

Saint Pete MRI also offers DTI

Diffusion Tensor Imaging also known as DTI is a specialized type of MRI that measures the movement of fluid in the brain, detecting areas where the normal flow is disrupted. A disrupted flow indicates where there could be an underlying abnormality.

A neuro-radiologist who specializes in a specific area of the body (brain) will review the images.

MRA

MR angiography (MRA) is an MRI study of the arteries. It utilizes MRI technology to detect, diagnose and aid the treatment of heart disorders, stroke, and arterial diseases. An injection of IV contrast may be required; this depends on the particular exam ordered.

COMMON USES

  • Patients with arterial disease will often benefit from an MRA as it helps find problem areas and gives the doctor a way to determine the best treatment.
  • The carotid arteries, which conduct blood flow to the brain, are a common site of atherosclerosis, which may severely narrow or block off an artery reducing blood flow to the brain and even cause a stroke. If an ultrasound study shows that such disease is present, many surgeons will request confirmation with MRA before performing the necessary operation, dispensing with the need for catheter angiography.
  • Diseased intracranial (in the head) arteries can also be diagnosed with an MRA, so that only those with positive findings will need to undergo a more invasive catheter study.
  • MRA is also used to detect disease in the aorta and in the arteries supplying the kidneys, lungs and legs.
  • Patients with a family history of aneurysms, a ballooning out of a segment of the arterial wall, can be screened with MRA to see if they have a similar disorder that has not produced symptoms. If found, the doctor can then take the necessary steps to treat it.
  • It can also be used to diagnose a variety of conditions like the following:
    • Aneurysms, bulges, in the aorta.
    • Dissections, tears, in the aorta.
    • Congenital heart defects.
    • Renal artery stenosis, a narrowing of the arteries in and around the kidneys.
    • Vasculitis, inflammation of the blood vessels.
    • Atherosclerosis, a hardening of the arteries.
    • Carotid artery disease, blockages in the major arteries that supply blood to the brain.